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2014-06-25mac80211: support more than one band in scan requestDavid Spinadel
Some drivers (such as iwlmvm) can handle multiple bands in a single HW scan request. Add a HW flag to indicate that the driver support this. To hold the required data, create a separate structure for HW scan request that holds cfg scan request and data about different parts of the scan IEs. As this changes the mac80211 API, update all drivers using it to use the correct new function type/argument. Signed-off-by: David Spinadel <david.spinadel@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: protect TDLS discovery sessionArik Nemtsov
After sending a TDLS discovery-request, we expect a reply to arrive on the AP's channel. We must stay on the channel (no PSM, scan, etc.), since a TDLS setup-response is a direct packet not buffered by the AP. Add a new mac80211 driver callback to allow discovery session protection. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: make sure TDLS peer STA exists during setupArik Nemtsov
Make sure userspace added a TDLS peer station before invoking the transmission of the first setup frame. This ensures packets to the peer won't go through the AP path. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: add API to request TDLS operation from userspaceArik Nemtsov
Write a mac80211 to the cfg80211 API for requesting a userspace TDLS operation. Define TDLS specific reason codes that can be used here. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: implement proper Tx path flushing for TDLSArik Nemtsov
As the spec mandates, flush data in the AP path before transmitting the first setup frame. Data packets transmitted during setup are already dropped in the Tx path. For the teardown flow, flush all packets in the direct path before transmitting the teardown frame. Un-authorize the peer sta after teardown is sent, forcing all subsequent Tx to the peer through the AP. Make sure to flush the queues when disabling the link to get the teardown packet out. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> [adjust to Luca's new quuee API and stop only vif queues] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: split tdls_mgmt functionArik Nemtsov
There are setup/teardown specific actions to be done that accompany the sending of a TDLS management packet. Split the main function to simplify future additions. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: use TDLS initiator in tdls_mgmt operationsArik Nemtsov
The TDLS initiator is set once during link setup. If determines the address ordering in the link identifier IE. Use the value from userspace in order to have a correct teardown packet. With the current code, a teardown from the responder side fails the TDLS MIC check because of a bad link identifier IE. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23cfg80211: pass TDLS initiator in tdls_mgmt operationsArik Nemtsov
The TDLS initiator is set once during link setup. If determines the address ordering in the link identifier IE. Fix dependent drivers - mwifiex and mac80211. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: cleanup TDLS state during failed setupArik Nemtsov
When setting up a TDLS session, register a delayed work to remove the peer if setup times out. Prevent concurrent setups to support this capacity. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: set auth flags after other station infoArik Nemtsov
For TDLS, the AUTHORIZED flag arrives with all other important station info (supported rates, HT/VHT caps, ...). Make sure to set the station state in the low-level driver after transferring this information to the mac80211 STA entry. This aligns the STA information during sta_state callbacks with the non-TDLS case. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: clarify TDLS Tx handlingArik Nemtsov
Rename the flags used in the Tx path and add an explanation for the reasons to drop, send directly or through the AP. Signed-off-by: Arik Nemtsov <arikx.nemtsov@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: stop only the queues assigned to the vif during channel switchLuciano Coelho
Instead of stopping all the hardware queues during channel switch, which is especially bad when we have large CSA counts, stop only the queues that are assigned to the vif that is performing the channel switch. Additionally, check for (sdata->csa_block_tx) instead of calling ieee80211_csa_needs_block_tx(), which can now be removed. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: add functions to stop and wake all queues assigned to a vifLuciano Coelho
In some cases we may want to stop the queues of a single vif (for instance during a channel-switch). Add a function that stops all the queues that are assigned to a vif. If a queue is assigned to more than one vif, the corresponding netdev subqueue of the other vif(s) will also be stopped. If the HW doesn't set the IEEE80211_HW_QUEUE_CONTROL flag, then all queues are stopped. Also add a corresponding function to wake the queues of a vif back. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: introduce refcount for queue_stop_reasonsLuciano Coelho
Sometimes different vifs may be stopping the queues for the same reason (e.g. when several interfaces are performing a channel switch). Instead of using a bitmask for the reasons, use an integer that holds a refcount instead. In order to keep it backwards compatible, introduce a boolean in some functions that tell us whether the queue stopping should be refcounted or not. For now, use not refcounted for all calls to keep it functionally the same as before. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: don't stop all queues when flushingLuciano Coelho
There is no need to stop all queues when we want to flush specific queues, so stop only the queues that will be flushed. Signed-off-by: Luciano Coelho <luciano.coelho@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23net: Mac80211: Remove silly timespec danceThomas Gleixner
Converting time from one format to another seems to give coders a warm and fuzzy feeling. Use the proper interfaces. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: John Stultz <john.stultz@linaro.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: John W. Linville <linville@tuxdriver.com> [fix compile error] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: Use ktime_get_ts()Thomas Gleixner
do_posix_clock_monotonic_gettime() is a leftover from the initial posix timer implementation which maps to ktime_get_ts(). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: use csa counter offsets instead of csa_activeMichal Kazior
vif->csa_active is protected by mutexes only. This means it is unreliable to depend on it on codeflow in non-sleepable beacon and CSA code. There was no guarantee to have vif->csa_active update be visible before beacons are updated on SMP systems. Using csa counter offsets which are embedded in beacon struct (and thus are protected with single RCU assignment) is much safer. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: move csa counters from sdata to beacon/prespMichal Kazior
Having csa counters part of beacon and probe_resp structures makes it easier to get rid of possible races between setting a beacon and updating counters on SMP systems by guaranteeing counters are always consistent against given beacon struct. While at it relax WARN_ON into WARN_ON_ONCE to prevent spamming logs and racing. Signed-off-by: Michal Kazior <michal.kazior@tieto.com> [remove pointless array check] Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: allow tx via monitor iface when DFSJanusz Dziedzic
Allow send frames using monitor interface when DFS chandef and we pass CAC (beaconing allowed). This fix problem when old kernel and new backports used, in such case hostapd create/use also monitor interface. Before this patch all frames hostapd send using monitor iface were dropped when AP was configured on DFS channel. Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23cfg80211: make ethtool the driver's responsibilityJohannes Berg
Currently, cfg80211 tries to implement ethtool, but that doesn't really scale well, with all the different operations. Make the lower-level driver responsible for it, which currently only has an effect on mac80211. It will similarly not scale well at that level though, since mac80211 also has many drivers. To cleanly implement this in mac80211, introduce a new file and move some code to appropriate places. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: remove weak WEP IV accountingJohannes Berg
Since WEP is practically dead, there seems very little point in keeping WEP weak IV accounting. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23trivial: net/mac80211/mesh.c: fix typo s/Substract/Subtract/Antonio Ospite
Signed-off-by: Antonio Ospite <ao2@ao2.it> Cc: Luis Carlos Cobo <luisca@cozybit.com> Cc: Johannes Berg <johannes@sipsolutions.net> Cc: linux-wireless@vger.kernel.org Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: remove ignore_plink_timer flagBob Copeland
The mesh_plink code is doing some interesting things with the ignore_plink_timer flag. It seems the original intent was to handle this race: cpu 0 cpu 1 ----- ----- start timer handler for state X acquire sta_lock change state from X to Y mod_timer() / del_timer() release sta_lock acquire sta_lock execute state Y timer too soon However, using the mod_timer()/del_timer() return values to detect these cases is broken. As a result, timers get ignored unnecessarily, and stations can get stuck in the peering state machine. Instead, we can detect the case by looking at the timer expiration. In the case of del_timer, just ignore the timers in the following (LISTEN/ESTAB) states since they won't have timers anyway. Signed-off-by: Bob Copeland <me@bobcopeland.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: fix station/driver powersave raceJohannes Berg
It is currently possible to have a race due to the station PS unblock work like this: * station goes to sleep with frames buffered in the driver * driver blocks wakeup * station wakes up again * driver flushes/returns frames, and unblocks, which schedules the unblock work * unblock work starts to run, and checks that the station is awake (i.e. that the WLAN_STA_PS_STA flag isn't set) * we process a received frame with PM=1, setting the flag again * ieee80211_sta_ps_deliver_wakeup() runs, delivering all frames to the driver, and then clearing the WLAN_STA_PS_DRIVER and WLAN_STA_PS_STA flags In this scenario, mac80211 will think that the station is awake, while it really is asleep, and any TX'ed frames should be filtered by the device (it will know that the station is sleeping) but then passed to mac80211 again, which will not buffer it either as it thinks the station is awake, and eventually the packets will be dropped. Fix this by moving the clearing of the flags to exactly where we learn about the situation. This creates a problem of reordering, so introduce another flag indicating that delivery is being done, this new flag also queues frames and is cleared only while the spinlock is held (which the queuing code also holds) so that any concurrent delivery/TX is handled correctly. Reported-by: Andrei Otcheretianski <andrei.otcheretianski@intel.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-23mac80211: remove PID rate controlJohn W. Linville
Minstrel has long since proven its worth. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2014-06-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix checksumming regressions, from Tom Herbert. 2) Undo unintentional permissions changes for SCTP rto_alpha and rto_beta sysfs knobs, from Denial Borkmann. 3) VXLAN, like other IP tunnels, should advertize it's encapsulation size using dev->needed_headroom instead of dev->hard_header_len. From Cong Wang. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: sctp: fix permissions for rto_alpha and rto_beta knobs vxlan: Checksum fixes net: add skb_pop_rcv_encapsulation udp: call __skb_checksum_complete when doing full checksum net: Fix save software checksum complete net: Fix GSO constants to match NETIF flags udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookup vxlan: use dev->needed_headroom instead of dev->hard_header_len MAINTAINERS: update cxgb4 maintainer
2014-06-15net: sctp: fix permissions for rto_alpha and rto_beta knobsDaniel Borkmann
Commit 3fd091e73b81 ("[SCTP]: Remove multiple levels of msecs to jiffies conversions.") has silently changed permissions for rto_alpha and rto_beta knobs from 0644 to 0444. The purpose of this was to discourage users from tweaking rto_alpha and rto_beta knobs in production environments since they are key to correctly compute rtt/srtt. RFC4960 under section 6.3.1. RTO Calculation says regarding rto_alpha and rto_beta under rule C3 and C4: [...] C3) When a new RTT measurement R' is made, set RTTVAR <- (1 - RTO.Beta) * RTTVAR + RTO.Beta * |SRTT - R'| and SRTT <- (1 - RTO.Alpha) * SRTT + RTO.Alpha * R' Note: The value of SRTT used in the update to RTTVAR is its value before updating SRTT itself using the second assignment. After the computation, update RTO <- SRTT + 4 * RTTVAR. C4) When data is in flight and when allowed by rule C5 below, a new RTT measurement MUST be made each round trip. Furthermore, new RTT measurements SHOULD be made no more than once per round trip for a given destination transport address. There are two reasons for this recommendation: First, it appears that measuring more frequently often does not in practice yield any significant benefit [ALLMAN99]; second, if measurements are made more often, then the values of RTO.Alpha and RTO.Beta in rule C3 above should be adjusted so that SRTT and RTTVAR still adjust to changes at roughly the same rate (in terms of how many round trips it takes them to reflect new values) as they would if making only one measurement per round-trip and using RTO.Alpha and RTO.Beta as given in rule C3. However, the exact nature of these adjustments remains a research issue. [...] While it is discouraged to adjust rto_alpha and rto_beta and not further specified how to adjust them, the RFC also doesn't explicitly forbid it, but rather gives a RECOMMENDED default value (rto_alpha=3, rto_beta=2). We have a couple of users relying on the old permissions before they got changed. That said, if someone really has the urge to adjust them, we could allow it with a warning in the log. Fixes: 3fd091e73b81 ("[SCTP]: Remove multiple levels of msecs to jiffies conversions.") Signed-off-by: Daniel Borkmann <dborkman@redhat.com> Cc: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-15net: Fix save software checksum completeTom Herbert
Geert reported issues regarding checksum complete and UDP. The logic introduced in commit 7e3cead5172927732f51fde ("net: Save software checksum complete") is not correct. This patch: 1) Restores code in __skb_checksum_complete_header except for setting CHECKSUM_UNNECESSARY. This function may be calculating checksum on something less than skb->len. 2) Adds saving checksum to __skb_checksum_complete. The full packet checksum 0..skb->len is calculated without adding in pseudo header. This value is saved in skb->csum and then the pseudo header is added to that to derive the checksum for validation. 3) In both __skb_checksum_complete_header and __skb_checksum_complete, set skb->csum_valid to whether checksum of zero was computed. This allows skb_csum_unnecessary to return true without changing to CHECKSUM_UNNECESSARY which was done previously. 4) Copy new csum related bits in __copy_skb_header. Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-13udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookupEric Dumazet
Its too easy to add thousand of UDP sockets on a particular bucket, and slow down an innocent multicast receiver. Early demux is supposed to be an optimization, we should avoid spending too much time in it. It is interesting to note __udp4_lib_demux_lookup() only tries to match first socket in the chain. 10 is the threshold we already have in __udp4_lib_lookup() to switch to secondary hash. Fixes: 421b3885bf6d5 ("udp: ipv4: Add udp early demux") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: David Held <drheld@google.com> Cc: Shawn Bohrer <sbohrer@rgmadvisors.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client Pull Ceph updates from Sage Weil: "This has a mix of bug fixes and cleanups. Alex's patch fixes a rare race in RBD. Ilya's patches fix an ENOENT check when a second rbd image is mapped and a couple memory leaks. Zheng fixes several issues with fragmented directories and multiple MDSs. Josh fixes a spin/sleep issue, and Josh and Guangliang's patches fix setting and unsetting RBD images read-only. Naturally there are several other cleanups mixed in for good measure" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client: (23 commits) rbd: only set disk to read-only once rbd: move calls that may sleep out of spin lock range rbd: add ioctl for rbd ceph: use truncate_pagecache() instead of truncate_inode_pages() ceph: include time stamp in every MDS request rbd: fix ida/idr memory leak rbd: use reference counts for image requests rbd: fix osd_request memory leak in __rbd_dev_header_watch_sync() rbd: make sure we have latest osdmap on 'rbd map' libceph: add ceph_monc_wait_osdmap() libceph: mon_get_version request infrastructure libceph: recognize poolop requests in debugfs ceph: refactor readpage_nounlock() to make the logic clearer mds: check cap ID when handling cap export message ceph: remember subtree root dirfrag's auth MDS ceph: introduce ceph_fill_fragtree() ceph: handle cap import atomically ceph: pre-allocate ceph_cap struct for ceph_add_cap() ceph: update inode fields according to issued caps rbd: replace IS_ERR and PTR_ERR with PTR_ERR_OR_ZERO ...
2014-06-12Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-nextLinus Torvalds
Pull networking updates from David Miller: 1) Seccomp BPF filters can now be JIT'd, from Alexei Starovoitov. 2) Multiqueue support in xen-netback and xen-netfront, from Andrew J Benniston. 3) Allow tweaking of aggregation settings in cdc_ncm driver, from Bjørn Mork. 4) BPF now has a "random" opcode, from Chema Gonzalez. 5) Add more BPF documentation and improve test framework, from Daniel Borkmann. 6) Support TCP fastopen over ipv6, from Daniel Lee. 7) Add software TSO helper functions and use them to support software TSO in mvneta and mv643xx_eth drivers. From Ezequiel Garcia. 8) Support software TSO in fec driver too, from Nimrod Andy. 9) Add Broadcom SYSTEMPORT driver, from Florian Fainelli. 10) Handle broadcasts more gracefully over macvlan when there are large numbers of interfaces configured, from Herbert Xu. 11) Allow more control over fwmark used for non-socket based responses, from Lorenzo Colitti. 12) Do TCP congestion window limiting based upon measurements, from Neal Cardwell. 13) Support busy polling in SCTP, from Neal Horman. 14) Allow RSS key to be configured via ethtool, from Venkata Duvvuru. 15) Bridge promisc mode handling improvements from Vlad Yasevich. 16) Don't use inetpeer entries to implement ID generation any more, it performs poorly, from Eric Dumazet. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1522 commits) rtnetlink: fix userspace API breakage for iproute2 < v3.9.0 tcp: fixing TLP's FIN recovery net: fec: Add software TSO support net: fec: Add Scatter/gather support net: fec: Increase buffer descriptor entry number net: fec: Factorize feature setting net: fec: Enable IP header hardware checksum net: fec: Factorize the .xmit transmit function bridge: fix compile error when compiling without IPv6 support bridge: fix smatch warning / potential null pointer dereference via-rhine: fix full-duplex with autoneg disable bnx2x: Enlarge the dorq threshold for VFs bnx2x: Check for UNDI in uncommon branch bnx2x: Fix 1G-baseT link bnx2x: Fix link for KR with swapped polarity lane sctp: Fix sk_ack_backlog wrap-around problem net/core: Add VF link state control policy net/fsl: xgmac_mdio is dependent on OF_MDIO net/fsl: Make xgmac_mdio read error message useful net_sched: drr: warn when qdisc is not work conserving ...
2014-06-12rtnetlink: fix userspace API breakage for iproute2 < v3.9.0Michal Schmidt
When running RHEL6 userspace on a current upstream kernel, "ip link" fails to show VF information. The reason is a kernel<->userspace API change introduced by commit 88c5b5ce5cb57 ("rtnetlink: Call nlmsg_parse() with correct header length"), after which the kernel does not see iproute2's IFLA_EXT_MASK attribute in the netlink request. iproute2 adjusted for the API change in its commit 63338dca4513 ("libnetlink: Use ifinfomsg instead of rtgenmsg in rtnl_wilddump_req_filter"). The problem has been noticed before: http://marc.info/?l=linux-netdev&m=136692296022182&w=2 (Subject: Re: getting VF link info seems to be broken in 3.9-rc8) We can do better than tell those with old userspace to upgrade. We can recognize the old iproute2 in the kernel by checking the netlink message length. Even when including the IFLA_EXT_MASK attribute, its netlink message is shorter than struct ifinfomsg. With this patch "ip link" shows VF information in both old and new iproute2 versions. Signed-off-by: Michal Schmidt <mschmidt@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12tcp: fixing TLP's FIN recoveryPer Hurtig
Fix to a problem observed when losing a FIN segment that does not contain data. In such situations, TLP is unable to recover from *any* tail loss and instead adds at least PTO ms to the retransmission process, i.e., RTO = RTO + PTO. Signed-off-by: Per Hurtig <per.hurtig@kau.se> Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Nandita Dukkipati <nanditad@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12bridge: fix compile error when compiling without IPv6 supportLinus Lüssing
Some fields in "struct net_bridge" aren't available when compiling the kernel without IPv6 support. Therefore adding a check/macro to skip the complaining code sections in that case. Introduced by 2cd4143192e8c60f66cb32c3a30c76d0470a372d ("bridge: memorize and export selected IGMP/MLD querier port") Reported-by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12bridge: fix smatch warning / potential null pointer dereferenceLinus Lüssing
"New smatch warnings: net/bridge/br_multicast.c:1368 br_ip6_multicast_query() error: we previously assumed 'group' could be null (see line 1349)" In the rare (sort of broken) case of a query having a Maximum Response Delay of zero, we could create a potential null pointer dereference. Fixing this by skipping the multicast specific MLD Query parsing again if no multicast group address is available. Introduced by dc4eb53a996a78bfb8ea07b47423ff5a3aadc362 ("bridge: adhere to querier election mechanism specified by RFCs") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Linus Lüssing <linus.luessing@web.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs Pull vfs updates from Al Viro: "This the bunch that sat in -next + lock_parent() fix. This is the minimal set; there's more pending stuff. In particular, I really hope to get acct.c fixes merged this cycle - we need that to deal sanely with delayed-mntput stuff. In the next pile, hopefully - that series is fairly short and localized (kernel/acct.c, fs/super.c and fs/namespace.c). In this pile: more iov_iter work. Most of prereqs for ->splice_write with sane locking order are there and Kent's dio rewrite would also fit nicely on top of this pile" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (70 commits) lock_parent: don't step on stale ->d_parent of all-but-freed one kill generic_file_splice_write() ceph: switch to iter_file_splice_write() shmem: switch to iter_file_splice_write() nfs: switch to iter_splice_write_file() fs/splice.c: remove unneeded exports ocfs2: switch to iter_file_splice_write() ->splice_write() via ->write_iter() bio_vec-backed iov_iter optimize copy_page_{to,from}_iter() bury generic_file_aio_{read,write} lustre: get rid of messing with iovecs ceph: switch to ->write_iter() ceph_sync_direct_write: stop poking into iov_iter guts ceph_sync_read: stop poking into iov_iter guts new helper: copy_page_from_iter() fuse: switch to ->write_iter() btrfs: switch to ->write_iter() ocfs2: switch to ->write_iter() xfs: switch to ->write_iter() ...
2014-06-12sctp: Fix sk_ack_backlog wrap-around problemXufeng Zhang
Consider the scenario: For a TCP-style socket, while processing the COOKIE_ECHO chunk in sctp_sf_do_5_1D_ce(), after it has passed a series of sanity check, a new association would be created in sctp_unpack_cookie(), but afterwards, some processing maybe failed, and sctp_association_free() will be called to free the previously allocated association, in sctp_association_free(), sk_ack_backlog value is decremented for this socket, since the initial value for sk_ack_backlog is 0, after the decrement, it will be 65535, a wrap-around problem happens, and if we want to establish new associations afterward in the same socket, ABORT would be triggered since sctp deem the accept queue as full. Fix this issue by only decrementing sk_ack_backlog for associations in the endpoint's list. Fix-suggested-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Xufeng Zhang <xufeng.zhang@windriver.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Vlad Yasevich <vyasevich@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-12Merge commit '9f12600fe425bc28f0ccba034a77783c09c15af4' into for-linusAl Viro
Backmerge of dcache.c changes from mainline. It's that, or complete rebase... Conflicts: fs/splice.c Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2014-06-11Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller
Conflicts: net/core/rtnetlink.c net/core/skbuff.c Both conflicts were very simple overlapping changes. Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11net/core: Add VF link state control policyDoug Ledford
Commit 1d8faf48c7 (net/core: Add VF link state control) added VF link state control to the netlink VF nested structure, but failed to add a proper entry for the new structure into the VF policy table. Add the missing entry so the table and the actual data copied into the netlink nested struct are in sync. Signed-off-by: Doug Ledford <dledford@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11net_sched: drr: warn when qdisc is not work conservingFlorian Westphal
The DRR scheduler requires that items on the active list are work conserving, i.e. do not hold on to skbs for throttling purposes, etc. Attaching e.g. tbf renders DRR useless because all other classes on the active list are delayed as well. So, warn users that this configuration won't work as expected; we already do this in couple of other qdiscs, see e.g. commit b00355db3f88d96810a60011a30cfb2c3469409d ('pkt_sched: sch_hfsc: sch_htb: Add non-work-conserving warning handler') The 'const' change is needed to avoid compiler warning ("discards 'const' qualifier from pointer target type"). tested with: drr_hier() { parent=$1 classes=$2 for i in $(seq 1 $classes); do classid=$parent$(printf %x $i) tc class add dev eth0 parent $parent classid $classid drr tc qdisc add dev eth0 parent $classid tbf rate 64kbit burst 256kbit limit 64kbit done } tc qdisc add dev eth0 root handle 1: drr drr_hier 1: 32 tc filter add dev eth0 protocol all pref 1 parent 1: handle 1 flow hash keys dst perturb 1 divisor 32 Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11net: Add skb_gro_postpull_rcsum to udp and vxlanTom Herbert
Need to gro_postpull_rcsum for GRO to work with checksum complete. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11net: Save software checksum completeTom Herbert
In skb_checksum complete, if we need to compute the checksum for the packet (via skb_checksum) save the result as CHECKSUM_COMPLETE. Subsequent checksum verification can use this. Also, added csum_complete_sw flag to distinguish between software and hardware generated checksum complete, we should always be able to trust the software computation. Signed-off-by: Tom Herbert <therbert@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11ceph: remove bogus externstephen hemminger
Sparse complained about this bogus extern on definition of a function. Signed-off-by: Stephen Hemminger <stephen@networkplumber.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11ipv4: fix a race in ip4_datagram_release_cb()Eric Dumazet
Alexey gave a AddressSanitizer[1] report that finally gave a good hint at where was the origin of various problems already reported by Dormando in the past [2] Problem comes from the fact that UDP can have a lockless TX path, and concurrent threads can manipulate sk_dst_cache, while another thread, is holding socket lock and calls __sk_dst_set() in ip4_datagram_release_cb() (this was added in linux-3.8) It seems that all we need to do is to use sk_dst_check() and sk_dst_set() so that all the writers hold same spinlock (sk->sk_dst_lock) to prevent corruptions. TCP stack do not need this protection, as all sk_dst_cache writers hold the socket lock. [1] https://code.google.com/p/address-sanitizer/wiki/AddressSanitizerForKernel AddressSanitizer: heap-use-after-free in ipv4_dst_check Read of size 2 by thread T15453: [<ffffffff817daa3a>] ipv4_dst_check+0x1a/0x90 ./net/ipv4/route.c:1116 [<ffffffff8175b789>] __sk_dst_check+0x89/0xe0 ./net/core/sock.c:531 [<ffffffff81830a36>] ip4_datagram_release_cb+0x46/0x390 ??:0 [<ffffffff8175eaea>] release_sock+0x17a/0x230 ./net/core/sock.c:2413 [<ffffffff81830882>] ip4_datagram_connect+0x462/0x5d0 ??:0 [<ffffffff81846d06>] inet_dgram_connect+0x76/0xd0 ./net/ipv4/af_inet.c:534 [<ffffffff817580ac>] SYSC_connect+0x15c/0x1c0 ./net/socket.c:1701 [<ffffffff817596ce>] SyS_connect+0xe/0x10 ./net/socket.c:1682 [<ffffffff818b0a29>] system_call_fastpath+0x16/0x1b ./arch/x86/kernel/entry_64.S:629 Freed by thread T15455: [<ffffffff8178d9b8>] dst_destroy+0xa8/0x160 ./net/core/dst.c:251 [<ffffffff8178de25>] dst_release+0x45/0x80 ./net/core/dst.c:280 [<ffffffff818304c1>] ip4_datagram_connect+0xa1/0x5d0 ??:0 [<ffffffff81846d06>] inet_dgram_connect+0x76/0xd0 ./net/ipv4/af_inet.c:534 [<ffffffff817580ac>] SYSC_connect+0x15c/0x1c0 ./net/socket.c:1701 [<ffffffff817596ce>] SyS_connect+0xe/0x10 ./net/socket.c:1682 [<ffffffff818b0a29>] system_call_fastpath+0x16/0x1b ./arch/x86/kernel/entry_64.S:629 Allocated by thread T15453: [<ffffffff8178d291>] dst_alloc+0x81/0x2b0 ./net/core/dst.c:171 [<ffffffff817db3b7>] rt_dst_alloc+0x47/0x50 ./net/ipv4/route.c:1406 [< inlined >] __ip_route_output_key+0x3e8/0xf70 __mkroute_output ./net/ipv4/route.c:1939 [<ffffffff817dde08>] __ip_route_output_key+0x3e8/0xf70 ./net/ipv4/route.c:2161 [<ffffffff817deb34>] ip_route_output_flow+0x14/0x30 ./net/ipv4/route.c:2249 [<ffffffff81830737>] ip4_datagram_connect+0x317/0x5d0 ??:0 [<ffffffff81846d06>] inet_dgram_connect+0x76/0xd0 ./net/ipv4/af_inet.c:534 [<ffffffff817580ac>] SYSC_connect+0x15c/0x1c0 ./net/socket.c:1701 [<ffffffff817596ce>] SyS_connect+0xe/0x10 ./net/socket.c:1682 [<ffffffff818b0a29>] system_call_fastpath+0x16/0x1b ./arch/x86/kernel/entry_64.S:629 [2] <4>[196727.311203] general protection fault: 0000 [#1] SMP <4>[196727.311224] Modules linked in: xt_TEE xt_dscp xt_DSCP macvlan bridge coretemp crc32_pclmul ghash_clmulni_intel gpio_ich microcode ipmi_watchdog ipmi_devintf sb_edac edac_core lpc_ich mfd_core tpm_tis tpm tpm_bios ipmi_si ipmi_msghandler isci igb libsas i2c_algo_bit ixgbe ptp pps_core mdio <4>[196727.311333] CPU: 17 PID: 0 Comm: swapper/17 Not tainted 3.10.26 #1 <4>[196727.311344] Hardware name: Supermicro X9DRi-LN4+/X9DR3-LN4+/X9DRi-LN4+/X9DR3-LN4+, BIOS 3.0 07/05/2013 <4>[196727.311364] task: ffff885e6f069700 ti: ffff885e6f072000 task.ti: ffff885e6f072000 <4>[196727.311377] RIP: 0010:[<ffffffff815f8c7f>] [<ffffffff815f8c7f>] ipv4_dst_destroy+0x4f/0x80 <4>[196727.311399] RSP: 0018:ffff885effd23a70 EFLAGS: 00010282 <4>[196727.311409] RAX: dead000000200200 RBX: ffff8854c398ecc0 RCX: 0000000000000040 <4>[196727.311423] RDX: dead000000100100 RSI: dead000000100100 RDI: dead000000200200 <4>[196727.311437] RBP: ffff885effd23a80 R08: ffffffff815fd9e0 R09: ffff885d5a590800 <4>[196727.311451] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 <4>[196727.311464] R13: ffffffff81c8c280 R14: 0000000000000000 R15: ffff880e85ee16ce <4>[196727.311510] FS: 0000000000000000(0000) GS:ffff885effd20000(0000) knlGS:0000000000000000 <4>[196727.311554] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 <4>[196727.311581] CR2: 00007a46751eb000 CR3: 0000005e65688000 CR4: 00000000000407e0 <4>[196727.311625] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 <4>[196727.311669] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 <4>[196727.311713] Stack: <4>[196727.311733] ffff8854c398ecc0 ffff8854c398ecc0 ffff885effd23ab0 ffffffff815b7f42 <4>[196727.311784] ffff88be6595bc00 ffff8854c398ecc0 0000000000000000 ffff8854c398ecc0 <4>[196727.311834] ffff885effd23ad0 ffffffff815b86c6 ffff885d5a590800 ffff8816827821c0 <4>[196727.311885] Call Trace: <4>[196727.311907] <IRQ> <4>[196727.311912] [<ffffffff815b7f42>] dst_destroy+0x32/0xe0 <4>[196727.311959] [<ffffffff815b86c6>] dst_release+0x56/0x80 <4>[196727.311986] [<ffffffff81620bd5>] tcp_v4_do_rcv+0x2a5/0x4a0 <4>[196727.312013] [<ffffffff81622b5a>] tcp_v4_rcv+0x7da/0x820 <4>[196727.312041] [<ffffffff815fd9e0>] ? ip_rcv_finish+0x360/0x360 <4>[196727.312070] [<ffffffff815de02d>] ? nf_hook_slow+0x7d/0x150 <4>[196727.312097] [<ffffffff815fd9e0>] ? ip_rcv_finish+0x360/0x360 <4>[196727.312125] [<ffffffff815fda92>] ip_local_deliver_finish+0xb2/0x230 <4>[196727.312154] [<ffffffff815fdd9a>] ip_local_deliver+0x4a/0x90 <4>[196727.312183] [<ffffffff815fd799>] ip_rcv_finish+0x119/0x360 <4>[196727.312212] [<ffffffff815fe00b>] ip_rcv+0x22b/0x340 <4>[196727.312242] [<ffffffffa0339680>] ? macvlan_broadcast+0x160/0x160 [macvlan] <4>[196727.312275] [<ffffffff815b0c62>] __netif_receive_skb_core+0x512/0x640 <4>[196727.312308] [<ffffffff811427fb>] ? kmem_cache_alloc+0x13b/0x150 <4>[196727.312338] [<ffffffff815b0db1>] __netif_receive_skb+0x21/0x70 <4>[196727.312368] [<ffffffff815b0fa1>] netif_receive_skb+0x31/0xa0 <4>[196727.312397] [<ffffffff815b1ae8>] napi_gro_receive+0xe8/0x140 <4>[196727.312433] [<ffffffffa00274f1>] ixgbe_poll+0x551/0x11f0 [ixgbe] <4>[196727.312463] [<ffffffff815fe00b>] ? ip_rcv+0x22b/0x340 <4>[196727.312491] [<ffffffff815b1691>] net_rx_action+0x111/0x210 <4>[196727.312521] [<ffffffff815b0db1>] ? __netif_receive_skb+0x21/0x70 <4>[196727.312552] [<ffffffff810519d0>] __do_softirq+0xd0/0x270 <4>[196727.312583] [<ffffffff816cef3c>] call_softirq+0x1c/0x30 <4>[196727.312613] [<ffffffff81004205>] do_softirq+0x55/0x90 <4>[196727.312640] [<ffffffff81051c85>] irq_exit+0x55/0x60 <4>[196727.312668] [<ffffffff816cf5c3>] do_IRQ+0x63/0xe0 <4>[196727.312696] [<ffffffff816c5aaa>] common_interrupt+0x6a/0x6a <4>[196727.312722] <EOI> <1>[196727.313071] RIP [<ffffffff815f8c7f>] ipv4_dst_destroy+0x4f/0x80 <4>[196727.313100] RSP <ffff885effd23a70> <4>[196727.313377] ---[ end trace 64b3f14fae0f2e29 ]--- <0>[196727.380908] Kernel panic - not syncing: Fatal exception in interrupt Reported-by: Alexey Preobrazhensky <preobr@google.com> Reported-by: dormando <dormando@rydia.ne> Signed-off-by: Eric Dumazet <edumazet@google.com> Fixes: 8141ed9fcedb2 ("ipv4: Add a socket release callback for datagram sockets") Cc: Steffen Klassert <steffen.klassert@secunet.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11net: add __pskb_copy_fclone and pskb_copy_for_cloneOctavian Purdila
There are several instances where a pskb_copy or __pskb_copy is immediately followed by an skb_clone. Add a couple of new functions to allow the copy skb to be allocated from the fclone cache and thus speed up subsequent skb_clone calls. Cc: Alexander Smirnov <alex.bluesman.smirnov@gmail.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Cc: Marek Lindner <mareklindner@neomailbox.ch> Cc: Simon Wunderlich <sw@simonwunderlich.de> Cc: Antonio Quartulli <antonio@meshcoding.com> Cc: Marcel Holtmann <marcel@holtmann.org> Cc: Gustavo Padovan <gustavo@padovan.org> Cc: Johan Hedberg <johan.hedberg@gmail.com> Cc: Arvid Brodin <arvid.brodin@alten.se> Cc: Patrick McHardy <kaber@trash.net> Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Cc: Lauro Ramos Venancio <lauro.venancio@openbossa.org> Cc: Aloisio Almeida Jr <aloisio.almeida@openbossa.org> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Jon Maloy <jon.maloy@ericsson.com> Cc: Allan Stephens <allan.stephens@windriver.com> Cc: Andrew Hendry <andrew.hendry@gmail.com> Cc: Eric Dumazet <edumazet@google.com> Reviewed-by: Christoph Paasch <christoph.paasch@uclouvain.be> Signed-off-by: Octavian Purdila <octavian.purdila@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11bridge: Support 802.1ad vlan filteringToshiaki Makita
This enables us to change the vlan protocol for vlan filtering. We come to be able to filter frames on the basis of 802.1ad vlan tags through a bridge. This also changes br->group_addr if it has not been set by user. This is needed for an 802.1ad bridge. (See IEEE 802.1Q-2011 8.13.5.) Furthermore, this sets br->group_fwd_mask_required so that an 802.1ad bridge can forward the Nearest Customer Bridge group addresses except for br->group_addr, which should be passed to higher layer. To change the vlan protocol, write a protocol in sysfs: # echo 0x88a8 > /sys/class/net/br0/bridge/vlan_protocol Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11bridge: Prepare for forwarding another bridge group addressesToshiaki Makita
If a bridge is an 802.1ad bridge, it must forward another bridge group addresses (the Nearest Customer Bridge group addresses). (For details, see IEEE 802.1Q-2011 8.6.3.) As user might not want group_fwd_mask to be modified by enabling 802.1ad, introduce a new mask, group_fwd_mask_required, which indicates addresses the bridge wants to forward. This will be set by enabling 802.1ad. Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-06-11bridge: Prepare for 802.1ad vlan filtering supportToshiaki Makita
This enables a bridge to have vlan protocol informantion and allows vlan tag manipulation (retrieve, insert and remove tags) according to the vlan protocol. Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp> Signed-off-by: David S. Miller <davem@davemloft.net>