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2011-12-05caif: Stash away hijacked skb destructor and call it latersjur.brandeland@stericsson.com
This patch adds functionality for avoiding orphaning SKB too early. The original skb is stashed away and the original destructor is called from the hi-jacked flow-on callback. If CAIF interface goes down and a hi-jacked SKB exists, the original skb->destructor is restored. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-05caif: Add support for flow-control on device's tx-queuesjur.brandeland@stericsson.com
Flow control is implemented by inspecting the qdisc queue length in order to detect potential overflow on the TX queue. When a threshold is reached flow-off is sent upwards in the CAIF stack. At the same time the skb->destructor is hi-jacked by orphaning the SKB and the original destructor is replaced with a "flow-on" callback. When the "hi-jacked" SKB is consumed the queue should be empty, and the "flow-on" callback is called and xon is sent upwards in the CAIF stack. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-12-05caif: Add support for CAIF over CDC NCM USB interfacesjur.brandeland@stericsson.com
NCM 1.0 does not support anything but Ethernet framing, hence CAIF payload will be put into Ethernet frames. Discovery is based on fixed USB vendor 0x04cc (ST-Ericsson), product-id 0x230f (NCM). In this variant only CAIF payload is sent over the NCM interface. The CAIF stack (cfusbl.c) will when USB interface register first check if we got a CDC NCM USB interface with the right VID, PID. It will then read the device's Ethernet address and create a 'template' Ethernet TX header, using a broadcast address as the destination address, and EthType 0x88b5 (802.1 Local Experimental - vendor specific). A protocol handler for 0x88b5 is setup for reception of CAIF frames from the CDC NCM USB interface. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-30caif: Remove unused enum and parameter in cfserlsjur.brandeland@stericsson.com
Remove unused enum cfcnfg_phy_type and the parameter to cfserl_create. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-30caif: Restructure how link caif link layer enrollsjur.brandeland@stericsson.com
Enrolling CAIF link layers are refactored. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-30caif: Allow cfpkt_extr_head to process empty messagesjur.brandeland@stericsson.com
Allow NULL pointer in cfpkt_extr_head in order to skip past header data. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-11-21caif: fix endian conversion in cffrml_transmit()Dan Carpenter
The "tmp" variable here is used to store the result of cpu_to_le16() so it should be an __le16 instead of an int. We want the high bits set and the current code works on little endian systems but not on big endian systems. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-31net: Add export.h for EXPORT_SYMBOL/THIS_MODULE to non-modulesPaul Gortmaker
These files are non modular, but need to export symbols using the macros now living in export.h -- call out the include so that things won't break when we remove the implicit presence of module.h from everywhere. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-31net: Fix files explicitly needing to include module.hPaul Gortmaker
With calls to modular infrastructure, these files really needs the full module.h header. Call it out so some of the cleanups of implicit and unrequired includes elsewhere can be cleaned up. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-10-25caif: Fix BUG() with network namespacesDavid Woodhouse
The caif code will register its own pernet_operations, and then register a netdevice_notifier. Each time the netdevice_notifier is triggered, it'll do some stuff... including a lookup of its own pernet stuff with net_generic(). If the net_generic() call ever returns NULL, the caif code will BUG(). That doesn't seem *so* unreasonable, I suppose — it does seem like it should never happen. However, it *does* happen. When we clone a network namespace, setup_net() runs through all the pernet_operations one at a time. It gets to loopback before it gets to caif. And loopback_net_init() registers a netdevice... while caif hasn't been initialised. So the caif netdevice notifier triggers, and immediately goes BUG(). We could imagine a complex and overengineered solution to this generic class of problems, but this patch takes the simple approach. It just makes caif_device_notify() *not* go looking for its pernet data structures if the device it's being notified about isn't a caif device in the first place. Cc: stable@kernel.org Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-10-03caif: add error handling for allocationDan Carpenter
The allocation of "phyinfo" wasn't checked, and also the allocation wasn't freed on error paths. Sjur Brændeland pointed out as well that "phy_driver" should be freed on the error path too. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-09-22Merge branch 'master' of github.com:davem330/netDavid S. Miller
Conflicts: MAINTAINERS drivers/net/Kconfig drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c drivers/net/ethernet/broadcom/tg3.c drivers/net/wireless/iwlwifi/iwl-pci.c drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c drivers/net/wireless/rt2x00/rt2800usb.c drivers/net/wireless/wl12xx/main.c
2011-09-16caif: fix a potential NULL dereferenceEric Dumazet
Commit bd30ce4bc0b7 (caif: Use RCU instead of spin-lock in caif_dev.c) added a potential NULL dereference in case alloc_percpu() fails. caif_device_alloc() can also use GFP_KERNEL instead of GFP_ATOMIC. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> CC: Sjur Brændeland <sjur.brandeland@stericsson.com> Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-28caif: Remove OOM messages, use kzallocJoe Perches
Remove per site OOM messages because they duplicate the generic mm subsystem OOM message. Use kzalloc instead of kmalloc/memset when next to the OOM message removals. Reduces object size (allyesconfig ~2%) $ size -t drivers/net/caif/built-in.o.old net/caif/built-in.o.old text data bss dec hex filename 32297 700 8224 41221 a105 drivers/net/caif/built-in.o.old 72159 1317 20552 94028 16f4c net/caif/built-in.o.old 104456 2017 28776 135249 21051 (TOTALS) $ size -t drivers/net/caif/built-in.o.new net/caif/built-in.o.new text data bss dec hex filename 31975 700 8184 40859 9f9b drivers/net/caif/built-in.o.new 70748 1317 20152 92217 16839 net/caif/built-in.o.new 102723 2017 28336 133076 207d4 (TOTALS) Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-08-02rcu: convert uses of rcu_assign_pointer(x, NULL) to RCU_INIT_POINTERStephen Hemminger
When assigning a NULL value to an RCU protected pointer, no barrier is needed. The rcu_assign_pointer, used to handle that but will soon change to not handle the special case. Convert all rcu_assign_pointer of NULL value. //smpl @@ expression P; @@ - rcu_assign_pointer(P, NULL) + RCU_INIT_POINTER(P, NULL) // </smpl> Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-21Remove redundant linux/version.h includes from net/Jesper Juhl
It was suggested by "make versioncheck" that the follwing includes of linux/version.h are redundant: /home/jj/src/linux-2.6/net/caif/caif_dev.c: 14 linux/version.h not needed. /home/jj/src/linux-2.6/net/caif/chnl_net.c: 10 linux/version.h not needed. /home/jj/src/linux-2.6/net/ipv4/gre.c: 19 linux/version.h not needed. /home/jj/src/linux-2.6/net/netfilter/ipset/ip_set_core.c: 20 linux/version.h not needed. /home/jj/src/linux-2.6/net/netfilter/xt_set.c: 16 linux/version.h not needed. and it seems that it is right. Beyond manually inspecting the source files I also did a few build tests with various configs to confirm that including the header in those files is indeed not needed. Here's a patch to remove the pointless includes. Signed-off-by: Jesper Juhl <jj@chaosbits.net> Acked-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-20Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/wireless/iwlwifi/iwl-agn-rxon.c drivers/net/wireless/rtlwifi/pci.c net/netfilter/ipvs/ip_vs_core.c
2011-06-16caif: Bugfix - XOFF removed channel from caif-muxsjur.brandeland@stericsson.com
XOFF was mixed up with DOWN indication, causing causing CAIF channel to be removed from mux and all incoming traffic to be lost after receiving flow-off. Fix this by replacing FLOW_OFF with DOWN notification. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@conan.davemloft.net>
2011-06-06net: remove interrupt.h inclusion from netdevice.hAlexey Dobriyan
* remove interrupt.g inclusion from netdevice.h -- not needed * fixup fallout, add interrupt.h and hardirq.h back where needed. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-06-01caif: Fix race when conditionally taking rtnl locksjur.brandeland@stericsson.com
Take the RTNL lock unconditionally when calling dev_close. Taking the lock conditionally may cause race conditions. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-22caif: Plug memory leak for checksum errorsjur.brandeland@stericsson.com
In case of checksum error, the framing layer returns -EILSEQ, but does not free the packet. Plug this hole by freeing the packet if -EILSEQ is returned. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-22caif: Fix freezes when running CAIF loopback devicesjur.brandeland@stericsson.com
Fix spinlock bugs when running out of link-ids in loopback tests and avoid allocating link-id when error is set in link-setup-response. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-22caif: Fixes freeze on Link layer removal.sjur.brandeland@stericsson.com
CAIF Socket layer - caif_socket.c: - Plug mem-leak at reconnect. - Always call disconnect to cleanup CAIF stack. - Disconnect will always report success. CAIF configuration layer - cfcnfg.c - Disconnect must dismantle the caif stack correctly - Protect against faulty removals (check on id zero) CAIF mux layer - cfmuxl.c - When inserting new service layer in the MUX remove any old entries with the same ID. - When removing CAIF Link layer, remove the associated service layers before notifying service layers. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-22caif: Bugfix add check NULL pointer before calling functions.sjur.brandeland@stericsson.com
Add check on layer->dn != NULL before calling functions in layer below. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: remove unesesarry exportssjur.brandeland@stericsson.com
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Bugfix debugfs directory name must be unique.sjur.brandeland@stericsson.com
Race condition caused debugfs_create_dir() to fail due to duplicate name. Use atomic counter to create unique directory name. net_ratelimit() is introduced to limit debug printouts. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Handle dev_queue_xmit errors.sjur.brandeland@stericsson.com
Do proper handling of dev_queue_xmit errors in order to avoid double free of skb and leaks in error conditions. In cfctrl pending requests are removed when CAIF Link layer goes down. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: prepare support for namespacessjur.brandeland@stericsson.com
Use struct net to reference CAIF configuration object instead of static variables. Refactor functions caif_connect_client, caif_disconnect_client and squach files cfcnfg.c and caif_config_utils. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Protected in-flight packets using dev or sock refcont.sjur.brandeland@stericsson.com
CAIF Socket Layer and ip-interface registers reference counters in CAIF service layer. The functions sock_hold, sock_put and dev_hold, dev_put are used by CAIF Stack to protect from freeing memory while packets are in-flight. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Move refcount from service layer to sock and dev.sjur.brandeland@stericsson.com
Instead of having reference counts in caif service layers, we hook into existing refcount handling in socket layer and netdevice. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Add ref-count to framing layersjur.brandeland@stericsson.com
Introduce Per-cpu reference for lower part of CAIF Stack. Before freeing payload is disabled, synchronize_rcu() is called, and then ref-count verified to be zero. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Use RCU and lists in cfcnfg.c for managing caif link layerssjur.brandeland@stericsson.com
RCU lists are used for handling the link layers instead of array. When generating CAIF phy-id, ifindex is used as base. Legal range is 1-6. Introduced set_phy_state() for managing CAIF Link layer state. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Use RCU instead of spin-lock in caif_dev.csjur.brandeland@stericsson.com
RCU read_lock and refcount is used to protect in-flight packets. Use RCU and counters to manage freeing lower part of the CAIF stack if CAIF-link layer is removed. Old solution based on delaying removal of device is removed. When CAIF link layer goes down the use of CAIF link layer is disabled (by calling caif_set_phy_state()), but removal and freeing of the lower part of the CAIF stack is done when Link layer is unregistered. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-15caif: Use rcu_read_lock in CAIF mux layer.sjur.brandeland@stericsson.com
Replace spin_lock with rcu_read_lock when accessing lists to layers and cache. While packets are in flight rcu_read_lock should not be held, instead ref-counters are used in combination with RCU. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-17caif: Fix set-but-unused variables.David S. Miller
The variable 'caifdef' is set but unused in modemcmd(). Similarly for 'net' in receive(), and 'res' in caif_device_notify() and caif_exit_net(). Just kill them off. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-11caif: Add BUG_ON if dev_info is missing in packetSjur Brændeland
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-11caif: Don't resend if dev_queue_xmit fails.Sjur Brændeland
If CAIF Link Layer returns an error, we no longer try to re-build the CAIF packet and resend it. Instead, we simply return any transmission errors to the socket client. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-11caif: code cleanupStephen Hemminger
Cleanup of new CAIF code. * make local functions static * remove code that is never used * expand get_caif_conf() since wrapper is no longer needed * make args to comparison functions const * rename connect_req_to_link_param to keep exported names consistent Compile tested only. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-11caif: performance bugfix - allow radio stack to prioritize packets.Sjur Brændeland
In the CAIF Payload message the Packet Type indication must be set to UNCLASSIFIED in order to allow packet prioritization in the modem's network stack. Otherwise TCP-Ack is not prioritized in the modems transmit queue. Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-04-11caif: Bugfix use for_each_safe when removing list nodes.Sjur Brændeland
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-03-31Fix common misspellingsLucas De Marchi
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-02-08Merge branch 'master' of ↵David S. Miller
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/e1000e/netdev.c
2011-02-08net/caif: Fix dangling list pointer in freed object on error.David S. Miller
rtnl_link_ops->setup(), and the "setup" callback passed to alloc_netdev*(), cannot make state changes which need to be undone on failure. There is no cleanup mechanism available at this point. So we have to add the caif private instance to the global list once we are sure that register_netdev() has succedded in ->newlink(). Otherwise, if register_netdev() fails, the caller will invoke free_netdev() and we will have a reference to freed up memory on the chnl_net_list. Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-19net: cleanup unused macros in net directoryShan Wei
Clean up some unused macros in net/*. 1. be left for code change. e.g. PGV_FROM_VMALLOC, PGV_FROM_VMALLOC, KMEM_SAFETYZONE. 2. never be used since introduced to kernel. e.g. P9_RDMA_MAX_SGE, UTIL_CTRL_PKT_SIZE. Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com> Acked-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-15caif: checking the wrong variableDan Carpenter
In the original code we check if (servl == NULL) twice. The first time should print the message that cfmuxl_remove_uplayer() failed and set "ret" correctly, but instead it just returns success. The second check should be checking the value of "ret" instead of "servl". Signed-off-by: Dan Carpenter <error27@gmail.com> Acked-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-10CAIF: Fix IPv6 support in receive path for GPRS/3GKumar Sanghvi
Checks version field of IP in the receive path for GPRS/3G data and appropriately sets the value of skb->protocol. Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2011-01-10caif: don't set connection request param size before copying dataDan Rosenberg
The size field should not be set until after the data is successfully copied in. Signed-off-by: Dan Rosenberg <drosenberg@vsecurity.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-22Net: caif: Makefile: Remove deprecated itemsTracey Dent
Changed Makefile to use <modules>-y instead of <modules>-objs because -objs is deprecated and not mentioned in Documentation/kbuild/makefiles.txt. Also, use the ccflags-$ flag instead of EXTRA_CFLAGS because EXTRA_CFLAGS is deprecated and should now be switched. Last but not least, took out if-conditionals. Signed-off-by: Tracey Dent <tdent48227@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-03caif: Remove noisy printout when disconnecting caif socketsjur.brandeland@stericsson.com
Signed-off-by: Sjur Brændeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-11-03caif: Bugfix for socket priority, bindtodev and dbg channel.André Carvalho de Matos
Changes: o Bugfix: SO_PRIORITY for SOL_SOCKET could not be handled in caif's setsockopt, using the struct sock attribute priority instead. o Bugfix: SO_BINDTODEVICE for SOL_SOCKET could not be handled in caif's setsockopt, using the struct sock attribute ifindex instead. o Wrong assert statement for RFM layer segmentation. o CAIF Debug channels was not working over SPI, caif_payload_info containing padding info must be initialized. o Check on pointer before dereferencing when unregister dev in caif_dev.c Signed-off-by: Sjur Braendeland <sjur.brandeland@stericsson.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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