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* ndisc: Unexport ndisc_{build,send}_skb().YOSHIFUJI Hideaki2012-12-121-16/+11
| | | | | | | | | | | | These symbols were exported for bonding device by commit 305d552a ("bonding: send IPv6 neighbor advertisement on failover"). It bacame obsolete by commit 7c899432 ("bonding, ipv4, ipv6, vlan: Handle NETDEV_BONDING_FAILOVER like NETDEV_NOTIFY_PEERS") and removed by commit 4f5762ec ("bonding: Remove obsolete source file 'bond_ipv6.c'"). Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* pkt_sched: avoid requeues if possibleEric Dumazet2012-12-124-6/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With BQL being deployed, we can more likely have following behavior : We dequeue a packet from qdisc in dequeue_skb(), then we realize target tx queue is in XOFF state in sch_direct_xmit(), and we have to hold the skb into gso_skb for later. This shows in stats (tc -s qdisc dev eth0) as requeues. Problem of these requeues is that high priority packets can not be dequeued as long as this (possibly low prio and big TSO packet) is not removed from gso_skb. At 1Gbps speed, a full size TSO packet is 500 us of extra latency. In some cases, we know that all packets dequeued from a qdisc are for a particular and known txq : - If device is non multi queue - For all MQ/MQPRIO slave qdiscs This patch introduces a new qdisc flag, TCQ_F_ONETXQUEUE to mark this capability, so that dequeue_skb() is allowed to dequeue a packet only if the associated txq is not stopped. This indeed reduce latencies for high prio packets (or improve fairness with sfq/fq_codel), and almost remove qdisc 'requeues'. Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵John W. Linville2012-12-1113-16/+62
|\ | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
| * Merge branch 'for-john' of git://git.sipsolutions.net/mac80211-nextJohn W. Linville2012-12-1113-16/+62
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| | * minstrel: update stats after processing statusJohannes Berg2012-12-101-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | Instead of updating stats before sending a packet, update them after processing the packet's status. This makes minstrel in line with minstrel_ht. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: a few whitespace fixesJohannes Berg2012-12-102-3/+3
| | | | | | | | | | | | Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * wext: explicitly cast -110 to u8Johannes Berg2012-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | This doesn't generate any different code, but will suppress a spurious smatch warning. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: warn only once if ampdu_action isn't assignedChaitanya2012-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | New drivers that might not support ampdu_action yet while in development cause a lot of warnings, use WARN_ON_ONCE instead. Signed-off-by: T Krushna Chaitanya <chaitanyatk@posedge.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: cancel work instead of waiting for it to do nothingJohannes Berg2012-12-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If the sdata work is pending while the interface is stopped, we currently flush it. If it's not running this means waiting for it to run, which could take a while if the workqueue is backlogged. However, the work exits right away if it starts to run while the interface is already stopping. There's no point in waiting for that, so use cancel_work_sync() instead. Reported-by: Ben Greear <greearb@candelatech.com> Tested-by: Ben Greear <greearb@candelatech.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: don't drop mesh peering frames from unknown STAMarco Porsch2012-12-061-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Previously, mesh peering frames from a STA without a station entry were being dropped. Mesh Peering Open and other frames (WLAN_CATEGORY_SELF_PROTECTED) are valid mesh peering frames even if received from a yet unknown station; the STA entry will be created in mesh_peer_init later. The problem didn't occur previously since both STAs receive each other's beacons which created the STA entry. However, this causes an unnecessary delay and beacons might not be received if either node is in PS mode. Signed-off-by: Marco Porsch <marco.porsch@etit.tu-chemnitz.de> [reword commit log a bit] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: skip radiotap space calculation if no monitor existsHelmut Schaa2012-12-051-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The radiotap header length "needed_headroom" is only required if we're sending the skb to a monitor interface. Hence, move the calculation a bit later so the calculation can be skipped if no monitor interface is present. Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: introduce IEEE80211_HW_TEARDOWN_AGGR_ON_BAR_FAILStanislaw Gruszka2012-12-051-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit f0425beda4d404a6e751439b562100b902ba9c98 "mac80211: retry sending failed BAR frames later instead of tearing down aggr" caused regression on rt2x00 hardware (connection hangs). This regression was fixed by commit be03d4a45c09ee5100d3aaaedd087f19bc20d01 "rt2x00: Don't let mac80211 send a BAR when an AMPDU subframe fails". But the latter commit caused yet another problem reported in https://bugzilla.kernel.org/show_bug.cgi?id=42828#c22 After long discussion in this thread: http://mid.gmane.org/20121018075615.GA18212@redhat.com and testing various alternative solutions, which failed on one or other setup, we have no other good fix for the issues like just revert both mentioned earlier commits. To do not affect other hardware which benefit from commit f0425beda4d404a6e751439b562100b902ba9c98, instead of reverting it, introduce flag that when used will restore mac80211 behaviour before the commit. Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com> [replaced link with mid.gmane.org that has message-id] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: add debug file for mic failureSaravana2012-12-053-1/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mic failure count provides the number of mic failures that have happened on a given key (without a countermeasure being started, since that would remove the key). Signed-off-by: Saravana <saravanad@posedge.com> [fix NULL pointer issues] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * cfg80211: check no-OFDM flag for channels wider than 20 MHzJohannes Berg2012-12-041-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | For channels wider than 20 MHz OFDM will be used, so when checking whether or not a channel is usable, check for the no-OFDM flag if the channel is wider than 20 MHz. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | * mac80211: adapt slot time in IBSS modeSimon Wunderlich2012-12-041-0/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In 5GHz/802.11a, we are allowed to use short slot times. Doing this may increases performance by 20% for legacy connections (54 MBit/s). I can confirm this in my tests (27% more throughput using iperf), and also have a small positive effect (5% more throughput) for HT rates, tested on 1 stream. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Mathias Kretschmer <mathias.kretschmer@fokus.fraunhofer.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
* | | net: gro: avoid double copy in skb_gro_receive()Eric Dumazet2012-12-111-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | __copy_skb_header(nskb, p) already copied p->cb[], no need to copy it again. Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | bridge: fix seq check in br_mdb_dump()Cong Wang2012-12-113-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of rehashing, introduce a global variable 'br_mdb_rehash_seq' which gets increased every time when rehashing, and assign net->dev_base_seq + br_mdb_rehash_seq to cb->seq. In theory cb->seq could be wrapped to zero, but this is not easy to fix, as net->dev_base_seq is not visible inside br_mdb_rehash(). In practice, this is rare. Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Graf <tgraf@suug.ch> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: remove obsolete simple_strto<foo>Abhijit Pawar2012-12-113-3/+0
| | | | | | | | | | | | | | | | | | | | | This patch removes the redundant occurences of simple_strto<foo> Signed-off-by: Abhijit Pawar <abhi.c.pawar@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: gro: dev_gro_receive() cleanupEric Dumazet2012-12-111-26/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | __napi_gro_receive() is inlined from two call sites for no good reason. Lets move the prep stuff in a function of its own, called only if/when needed. This saves 300 bytes on x86 : # size net/core/dev.o.after net/core/dev.o.before text data bss dec hex filename 51968 1238 1040 54246 d3e6 net/core/dev.o.before 51664 1238 1040 53942 d2b6 net/core/dev.o.after Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: Allow DCBnl to use other namespaces besides init_netJohn Fastabend2012-12-101-5/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Allow DCB and net namespace to work together. This is useful if you have containers that are bound to 'phys' interfaces that want to also manage their DCB attributes. The net namespace is taken from sock_net(skb->sk) of the netlink skb. CC: "Eric W. Biederman" <ebiederm@xmission.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: remove obsolete simple_strto<foo>Abhijit Pawar2012-12-104-4/+18
| | | | | | | | | | | | | | | | | | | | | | | | This patch replace the obsolete simple_strto<foo> with kstrto<foo> Signed-off-by: Abhijit Pawar <abhi.c.pawar@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | bridge: make buffer larger in br_setlink()Dan Carpenter2012-12-101-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We pass IFLA_BRPORT_MAX to nla_parse_nested() so we need IFLA_BRPORT_MAX + 1 elements. Also Smatch complains that we read past the end of the array when in br_set_port_flag() when it's called with IFLA_BRPORT_FAST_LEAVE. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Acked-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | caif_usb: Make the driver name check more efficientBen Hutchings2012-12-091-10/+3
| | | | | | | | | | | | | | | | | | | | | | | | Use the device model to get just the name, rather than using the ethtool API to get all driver information. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | caif_usb: Check driver name before reading driver state in netdev notifierBen Hutchings2012-12-091-2/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In cfusbl_device_notify(), the usbnet and usbdev variables are initialised before the driver name has been checked. In case the device's driver is not cdc_ncm, this may result in reading beyond the end of the netdev private area. Move the initialisation below the driver name check. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: Handle encapsulated offloads before fragmentation or handing to lower devAlexander Duyck2012-12-092-2/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This change allows the VXLAN to enable Tx checksum offloading even on devices that do not support encapsulated checksum offloads. The advantage to this is that it allows for the lower device to change due to routing table changes without impacting features on the VXLAN itself. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | net: Add support for hardware-offloaded encapsulationJoseph Gasparakis2012-12-091-0/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds support in the kernel for offloading in the NIC Tx and Rx checksumming for encapsulated packets (such as VXLAN and IP GRE). For Tx encapsulation offload, the driver will need to set the right bits in netdev->hw_enc_features. The protocol driver will have to set the skb->encapsulation bit and populate the inner headers, so the NIC driver will use those inner headers to calculate the csum in hardware. For Rx encapsulation offload, the driver will need to set again the skb->encapsulation flag and the skb->ip_csum to CHECKSUM_UNNECESSARY. In that case the protocol driver should push the decapsulated packet up to the stack, again with CHECKSUM_UNNECESSARY. In ether case, the protocol driver should set the skb->encapsulation flag back to zero. Finally the protocol driver should have NETIF_F_RXCSUM flag set in its features. Signed-off-by: Joseph Gasparakis <joseph.gasparakis@intel.com> Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | Merge branch 'tipc_net-next_v2' of ↵David S. Miller2012-12-085-212/+225
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux Paul Gortmaker says: ==================== Changes since v1: -get rid of essentially unused variable spotted by Neil Horman (patch #2) -drop patch #3; defer it for 3.9 content, so Neil, Jon and Ying can discuss its specifics at their leisure while net-next is closed. (It had no direct dependencies to the rest of the series, and was just an optimization) -fix indentation of accept() code directly in place vs. forking it out to a separate function (was patch #10, now patch #9). Rebuilt and re-ran tests just to ensure nothing odd happened. Original v1 text follows, updated pull information follows that. --------- Here is another batch of TIPC changes. The most interesting thing is probably the non-blocking socket connect - I'm told there were several users looking forward to seeing this. Also there were some resource limitation changes that had the right intent back in 2005, but were now apparently causing needless limitations to people's real use cases; those have been relaxed/removed. There is a lockdep splat fix, but no need for a stable backport, since it is virtually impossible to trigger in mainline; you have to essentially modify code to force the probabilities in your favour to see it. The rest can largely be categorized as general cleanup of things seen in the process of getting the above changes done. Tested between 64 and 32 bit nodes with the test suite. I've also compile tested all the individual commits on the chain. I'd originally figured on this queue not being ready for 3.8, but the extended stabilization window of 3.7 has changed that. On the other hand, this can still be 3.9 material, if that simply works better for folks - no problem for me to defer it to 2013. If anyone spots any problems then I'll definitely defer it, rather than rush a last minute respin. =================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | tipc: refactor accept() code for improved readabilityPaul Gortmaker2012-12-071-41/+48
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In TIPC's accept() routine, there is a large block of code relating to initialization of a new socket, all within an if condition checking if the allocation succeeded. Here, we simply flip the check of the if, so that the main execution path stays at the same indentation level, which improves readability. If the allocation fails, we jump to an already existing exit label. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: add lock nesting notation to quiet lockdep warningYing Xue2012-12-071-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TIPC accept() call grabs the socket lock on a newly allocated socket while holding the socket lock on an old socket. But lockdep worries that this might be a recursive lock attempt: [ INFO: possible recursive locking detected ] --------------------------------------------- kworker/u:0/6 is trying to acquire lock: (sk_lock-AF_TIPC){+.+.+.}, at: [<c8c1226c>] accept+0x15c/0x310 [tipc] but task is already holding lock: (sk_lock-AF_TIPC){+.+.+.}, at: [<c8c12138>] accept+0x28/0x310 [tipc] other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(sk_lock-AF_TIPC); lock(sk_lock-AF_TIPC); *** DEADLOCK *** May be due to missing lock nesting notation [...] Tell lockdep that this locking is safe by using lock_sock_nested(). This is similar to what was done in commit 5131a184a3458d9 for SCTP code ("SCTP: lock_sock_nested in sctp_sock_migrate"). Also note that this is isn't something that is seen normally, as it was uncovered with some experimental work-in-progress code not yet ready for mainline. So no need for stable backports or similar of this commit. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: eliminate connection setup for implied connect in recv_msg()Ying Xue2012-12-071-7/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As connection setup is now completed asynchronously in BH context, in the function filter_connect(), the corresponding code in recv_msg() becomes redundant. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: introduce non-blocking socket connectYing Xue2012-12-071-65/+93
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | TIPC has so far only supported blocking connect(), meaning that a call to connect() doesn't return until either the connection is fully established, or an error occurs. This has proved insufficient for many users, so we now introduce non-blocking connect(), analogous to how this is done in TCP and other protocols. With this feature, if a connection cannot be established instantly, connect() will return the error code "-EINPROGRESS". If the user later calls connect() again, he will either have the return code "-EALREADY" or "-EISCONN", depending on whether the connection has been established or not. The user must have explicitly set the socket to be non-blocking (SOCK_NONBLOCK or O_NONBLOCK, depending on method used), so unless for some reason they had set this already (the socket would anyway remain blocking in current TIPC) this change should be completely backwards compatible. It is also now possible to call select() or poll() to wait for the completion of a connection. An effect of the above is that the actual completion of a connection may now be performed asynchronously, independent of the calls from user space. Therefore, we now execute this code in BH context, in the function filter_rcv(), which is executed upon reception of messages in the socket. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> [PG: minor refactoring for improved connect/disconnect function names] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: consolidate connection-oriented message reception in one functionYing Xue2012-12-071-24/+51
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Handling of connection-related message reception is currently scattered around at different places in the code. This makes it harder to verify that things are handled correctly in all possible scenarios. So we consolidate the existing processing of connection-oriented message reception in a single routine. In the process, we convert the chain of if/else into a switch/case for improved readability. A cast on the socket_state in the switch is needed to avoid compile warnings on 32 bit, like "net/tipc/socket.c:1252:2: warning: case value ‘4294967295’ not in enumerated type". This happens because existing tipc code pseudo extends the default linux socket state values with: #define SS_LISTENING -1 /* socket is listening */ #define SS_READY -2 /* socket is connectionless */ It may make sense to add these as _positive_ values to the existing socket state enum list someday, vs. these already existing defines. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> [PG: add cast to fix warning; remove returns from middle of switch] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: standardize across connect/disconnect function namingPaul Gortmaker2012-12-074-15/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we have tipc_disconnect and tipc_disconnect_port. It is not clear from the names alone, what they do or how they differ. It turns out that tipc_disconnect just deals with the port locking and then calls tipc_disconnect_port which does all the work. If we rename as follows: tipc_disconnect_port --> __tipc_disconnect then we will be following typical linux convention, where: __tipc_disconnect: "raw" function that does all the work. tipc_disconnect: wrapper that deals with locking and then calls the real core __tipc_disconnect function With this, the difference is immediately evident, and locking violations are more apt to be spotted by chance while working on, or even just while reading the code. On the connect side of things, we currently only have the single "tipc_connect2port" function. It does both the locking at enter/exit, and the core of the work. Pending changes will make it desireable to have the connect be a two part locking wrapper + worker function, just like the disconnect is already. Here, we make the connect look just like the updated disconnect case, for the above reason, and for consistency. In the process, we also get rid of the "2port" suffix that was on the original name, since it adds no descriptive value. On close examination, one might notice that the above connect changes implicitly move the call to tipc_link_get_max_pkt() to be within the scope of tipc_port_lock() protected region; when it was not previously. We don't see any issues with this, and it is in keeping with __tipc_connect doing the work and tipc_connect just handling the locking. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: change sk_receive_queue upper limitJon Maloy2012-12-071-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The sk_recv_queue upper limit for connectionless sockets has empirically turned out to be too low. When we double the current limit we get much fewer rejected messages and no noticable negative side-effects. Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: eliminate aggregate sk_receive_queue limitYing Xue2012-12-071-19/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As a complement to the per-socket sk_recv_queue limit, TIPC keeps a global atomic counter for the sum of sk_recv_queue sizes across all tipc sockets. When incremented, the counter is compared to an upper threshold value, and if this is reached, the message is rejected with error code TIPC_OVERLOAD. This check was originally meant to protect the node against buffer exhaustion and general CPU overload. However, all experience indicates that the feature not only is redundant on Linux, but even harmful. Users run into the limit very often, causing disturbances for their applications, while removing it seems to have no negative effects at all. We have also seen that overall performance is boosted significantly when this bottleneck is removed. Furthermore, we don't see any other network protocols maintaining such a mechanism, something strengthening our conviction that this control can be eliminated. As a result, the atomic variable tipc_queue_size is now unused and so it can be deleted. There is a getsockopt call that used to allow reading it; we retain that but just return zero for maximum compatibility. Signed-off-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> Cc: Neil Horman <nhorman@tuxdriver.com> [PG: phase out tipc_queue_size as pointed out by Neil Horman] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| * | | tipc: remove obsolete flush of stale reassembly bufferErik Hugne2012-12-061-44/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Each link instance has a periodic job checking if there is a stale ongoing message reassembly associated to the link. If no new fragment has been received during the last 4*[link_tolerance] period, it is assumed the missing fragment will never arrive. As a consequence, the reassembly buffer is discarded, and a gap in the message sequence occurs. This assumption is wrong. After we abandoned our ambition to develop packet routing for multi-cluster networks, only single-hop packet transfer remains as an option. For those, all packets are guaranteed to be delivered in sequence to the defragmentation layer. Any failure to achieve sequenced delivery will eventually lead to link reset, and the reassembly buffer will be flushed anyway. So we just remove this periodic check, which is now obsolete. Signed-off-by: Erik Hugne <erik.hugne@ericsson.com> Acked-by: Ying Xue <ying.xue@windriver.com> Signed-off-by: Jon Maloy <jon.maloy@ericsson.com> [PG: also delete get/inc_timer count, since they are now unused] Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* | | | bridge: export multicast database via netlinkCong Wang2012-12-074-1/+166
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | V5: fix two bugs pointed out by Thomas remove seq check for now, mark it as TODO V4: remove some useless #include some coding style fix V3: drop debugging printk's update selinux perm table as well V2: drop patch 1/2, export ifindex directly Redesign netlink attributes Improve netlink seq check Handle IPv6 addr as well This patch exports bridge multicast database via netlink message type RTM_GETMDB. Similar to fdb, but currently bridge-specific. We may need to support modify multicast database too (RTM_{ADD,DEL}MDB). (Thanks to Thomas for patient reviews) Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: Stephen Hemminger <shemminger@vyatta.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Graf <tgraf@suug.ch> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Cong Wang <amwang@redhat.com> Acked-by: Thomas Graf <tgraf@suug.ch> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | sctp: Add RCU protection to assoc->transport_addr_listThomas Graf2012-12-073-10/+28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | peer.transport_addr_list is currently only protected by sk_sock which is inpractical to acquire for procfs dumping purposes. This patch adds RCU protection allowing for the procfs readers to enter RCU read-side critical sections. Modification of the list continues to be serialized via sk_lock. V2: Use list_del_rcu() in sctp_association_free() to be safe Skip transports marked dead when dumping for procfs Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | sctp: proc: protect bind_addr->address_list accesses with rcu_read_lock()Thomas Graf2012-12-071-1/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | address_list is protected via the socket lock or RCU. Since we don't want to take the socket lock for each assoc we dump in procfs a RCU read-side critical section must be entered. V2: Skip local addresses marked as dead Cc: Vlad Yasevich <vyasevich@gmail.com> Cc: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Thomas Graf <tgraf@suug.ch> Acked-by: Vlad Yasevich <vyasevic@gmail.com> Acked-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | Merge branch 'for-davem' of ↵David S. Miller2012-12-0735-598/+1173
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next John W. Linville says: ==================== This pull request is intended for 3.8... This includes a Bluetooth pull. Gustavo says: "A few more patches to 3.8, I hope they can still make it to mainline! The most important ones are the socket option for the SCO protocol to allow accept/refuse new connections from userspace. Other than that I added some fixes and Andrei did more AMP work." Also, a mac80211 pull. Johannes says: "If you think there's any chance this might make it still, please pull my mac80211-next tree (per below). This contains a relatively large number of fixes to the previous code, as well as a few small features: * VHT association in mac80211 * some new debugfs files * P2P GO powersave configuration * masked MAC address verification The biggest patch is probably the BSS struct changes to use RCU for their IE buffers to fix potential races. I've not tagged this for stable because it's pretty invasive and nobody has ever seen any bugs in this area as far as I know." Several other drivers get some attention, including ath9k, brcmfmac, brcmsmac, and a number of others. Also, Hauke gives us a series that improves watchdog support for the bcma and ssb busses. Finally, Bill Pemberton delivers a group of "remove __dev* attributes" for wireless drivers -- these generate some "section mismatch" warnings, but Greg K-H assures me that they will disappear by the time -rc1 is released. This also includes a pull of the wireless tree to avoid merge conflicts. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * \ \ \ Merge branch 'master' of ↵John W. Linville2012-12-0735-598/+1173
| |\ \ \ \ | | | |/ / | | |/| | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
| | * | | rfkill: remove __dev* attributesBill Pemberton2012-12-062-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Signed-off-by: Bill Pemberton <wfp5p@virginia.edu> Cc: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: John W. Linville <linville@tuxdriver.com>
| | * | | Merge branch 'for-john' of ↵John W. Linville2012-12-0625-517/+978
| | |\ \ \ | | | | |/ | | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Conflicts: drivers/net/wireless/mwifiex/sta_ioctl.c net/mac80211/scan.c
| | | * | cfg80211: fix channel error on mesh joinMarco Porsch2012-12-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix an error on mesh join when no channel has been explicitly set beforehand. Also remove a double semicolon. Signed-off-by: Marco Porsch <marco.porsch@etit.tu-chemnitz.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | mac80211: return if CSA is not handleSimon Wunderlich2012-12-031-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If channel contexts are enabled, the CSA should not be processed further. A return is missing here. Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | mac80211: simplify loop in minstrel_htJohannes Berg2012-11-301-5/+3
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | cfg80211: fix BSS struct IE access racesJohannes Berg2012-11-309-260/+292
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a BSS struct is updated, the IEs are currently overwritten or freed. This can lead to races if some other CPU is accessing the BSS struct and using the IEs concurrently. Fix this by always allocating the IEs in a new struct that holds the data and length and protecting access to this new struct with RCU. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | mac80211: remove probe response temporary buffer allocationJohannes Berg2012-11-302-24/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of allocating a temporary buffer to build IEs build them right into the SKB. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | mac80211: make ieee80211_build_preq_ies saferJohannes Berg2012-11-303-17/+41
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of assuming 200 bytes are always enough for all the IEs we add, give the length of the buffer to the function and warn instead of overrunning. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
| | | * | cfg80211: fix cmp_hidden_bssJohannes Berg2012-11-301-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The cmp_bss() comparator function uses memcmp() to compare the SSID. This means that cmp_hidden_bss() needs to similarly return a number bigger than zero (use 1) instead of -1 when ie1 is bigger than ie2, which is the case if an ie2 byte is non-zero. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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