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2014-09-19udp_tunnel: Seperate ipv6 functions into its own file.Andy Zhou3-64/+85
Add ip6_udp_tunnel.c for ipv6 UDP tunnel functions to avoid ifdefs in udp_tunnel.c Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net: sched: cls_cgroup need tcf_exts_init in all casesJohn Fastabend1-4/+3
This ensures the tcf_exts_init() is called for all cases. Fixes: 952313bd62589cae216a57 ("net: sched: cls_cgroup use RCU") Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16Merge branch 'net_next_ovs' of ↵David S. Miller10-126/+402
git://git.kernel.org/pub/scm/linux/kernel/git/pshelar/openvswitch Pravin B Shelar says: ==================== Open vSwitch Following patches adds recirculation and hash action to OVS. First patch removes pointer to stack object. Next three patches does code restructuring which is required for last patch. Recirculation implementation is changed, according to comments from David Miller, to avoid using recursive calls in OVS. It is using queue to record recirc action and deferred recirc is executed at the end of current actions execution. v1-v2: Changed subsystem name in subject to openvswitch v2-v3: Added patch to remove pkt_key pointer from skb->cb. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net: sched: cls_fw: add missing tcf_exts_init call in fw_change()John Fastabend1-0/+2
When allocating a new structure we also need to call tcf_exts_init to initialize exts. A follow up patch might be in order to remove some of this code and do tcf_exts_assign(). With this we could remove the tcf_exts_init/tcf_exts_change pattern for some of the classifiers. As part of the future tcf_actions RCU series this will need to be done. For now fix the call here. Fixes e35a8ee5993ba81fd6c0 ("net: sched: fw use RCU") Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net: sched: cls_cgroup fix possible memory leak of 'new'John Fastabend1-4/+9
tree: git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git master head: 54996b529ab70ca1d6f40677cd2698c4f7127e87 commit: c7953ef23042b7c4fc2be5ecdd216aacff6df5eb [625/646] net: sched: cls_cgroup use RCU net/sched/cls_cgroup.c:130 cls_cgroup_change() warn: possible memory leak of 'new' net/sched/cls_cgroup.c:135 cls_cgroup_change() warn: possible memory leak of 'new' net/sched/cls_cgroup.c:139 cls_cgroup_change() warn: possible memory leak of 'new' Fixes: c7953ef23042b7c4fc2be5ecdd216aac ("net: sched: cls_cgroup use RCU") Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net: sched: cls_u32 add missing rcu_assign_pointer and annotationJohn Fastabend1-3/+4
Add missing rcu_assign_pointer and missing annotation for ht_up in cls_u32.c Caught by kbuild bot, >> net/sched/cls_u32.c:378:36: sparse: incorrect type in initializer (different address spaces) net/sched/cls_u32.c:378:36: expected struct tc_u_hnode *ht net/sched/cls_u32.c:378:36: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:610:54: sparse: incorrect type in argument 4 (different address spaces) net/sched/cls_u32.c:610:54: expected struct tc_u_hnode *ht net/sched/cls_u32.c:610:54: got struct tc_u_hnode [noderef] <asn:4>*ht_up >> net/sched/cls_u32.c:684:18: sparse: incorrect type in assignment (different address spaces) net/sched/cls_u32.c:684:18: expected struct tc_u_hnode [noderef] <asn:4>*ht_up net/sched/cls_u32.c:684:18: got struct tc_u_hnode *[assigned] ht >> net/sched/cls_u32.c:359:18: sparse: dereference of noderef expression Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net: sched: fix unsued cpu variableJohn Fastabend1-3/+4
kbuild test robot reported an unused variable cpu in cls_u32.c after the patch below. This happens when PERF and MARK config variables are disabled Fix this is to use separate variables for perf and mark and define the cpu variable inside the ifdef logic. Fixes: 459d5f626da7 ("net: sched: make cls_u32 per cpu")' Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Cong Wang <cwang@twopensource.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net_sched: fix a null pointer dereference in tcindex_set_parms()WANG Cong1-1/+1
This patch fixes the following crash: [ 42.199159] BUG: unable to handle kernel NULL pointer dereference at 0000000000000018 [ 42.200027] IP: [<ffffffff817e3fc4>] tcindex_set_parms+0x45c/0x526 [ 42.200027] PGD d2319067 PUD d4ffe067 PMD 0 [ 42.200027] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC [ 42.200027] CPU: 0 PID: 541 Comm: tc Not tainted 3.17.0-rc4+ #603 [ 42.200027] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.200027] task: ffff8800d22d2670 ti: ffff8800ce790000 task.ti: ffff8800ce790000 [ 42.200027] RIP: 0010:[<ffffffff817e3fc4>] [<ffffffff817e3fc4>] tcindex_set_parms+0x45c/0x526 [ 42.200027] RSP: 0018:ffff8800ce793898 EFLAGS: 00010202 [ 42.200027] RAX: 0000000000000001 RBX: ffff8800d1786498 RCX: 0000000000000000 [ 42.200027] RDX: ffffffff82114ec8 RSI: ffffffff82114ec8 RDI: ffffffff82114ec8 [ 42.200027] RBP: ffff8800ce793958 R08: 00000000000080d0 R09: 0000000000000001 [ 42.200027] R10: ffff8800ce7939a0 R11: 0000000000000246 R12: ffff8800d017d238 [ 42.200027] R13: 0000000000000018 R14: ffff8800d017c6a0 R15: ffff8800d1786620 [ 42.200027] FS: 00007f4e24539740(0000) GS:ffff88011a600000(0000) knlGS:0000000000000000 [ 42.200027] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.200027] CR2: 0000000000000018 CR3: 00000000cff38000 CR4: 00000000000006f0 [ 42.200027] Stack: [ 42.200027] ffff8800ce0949f0 0000000000000000 0000000200000003 ffff880000000000 [ 42.200027] ffff8800ce7938b8 ffff8800ce7938b8 0000000600000007 0000000000000000 [ 42.200027] ffff8800ce7938d8 ffff8800ce7938d8 0000000600000007 ffff8800ce0949f0 [ 42.200027] Call Trace: [ 42.200027] [<ffffffff817e4169>] tcindex_change+0xdb/0xee [ 42.200027] [<ffffffff817c16ca>] tc_ctl_tfilter+0x44d/0x63f [ 42.200027] [<ffffffff8179d161>] rtnetlink_rcv_msg+0x181/0x194 [ 42.200027] [<ffffffff8179cf9d>] ? rtnl_lock+0x17/0x19 [ 42.200027] [<ffffffff8179cfe0>] ? __rtnl_unlock+0x17/0x17 [ 42.200027] [<ffffffff817ee296>] netlink_rcv_skb+0x49/0x8b [ 43.462494] [<ffffffff8179cfc2>] rtnetlink_rcv+0x23/0x2a [ 43.462494] [<ffffffff817ec8df>] netlink_unicast+0xc7/0x148 [ 43.462494] [<ffffffff817ed413>] netlink_sendmsg+0x5cb/0x63d [ 43.462494] [<ffffffff810ad781>] ? mark_lock+0x2e/0x224 [ 43.462494] [<ffffffff817757b8>] __sock_sendmsg_nosec+0x25/0x27 [ 43.462494] [<ffffffff81778165>] sock_sendmsg+0x57/0x71 [ 43.462494] [<ffffffff81152bbd>] ? might_fault+0x57/0xa4 [ 43.462494] [<ffffffff81152c06>] ? might_fault+0xa0/0xa4 [ 43.462494] [<ffffffff81152bbd>] ? might_fault+0x57/0xa4 [ 43.462494] [<ffffffff817838fd>] ? verify_iovec+0x69/0xb7 [ 43.462494] [<ffffffff817784f8>] ___sys_sendmsg+0x21d/0x2bb [ 43.462494] [<ffffffff81009db3>] ? native_sched_clock+0x35/0x37 [ 43.462494] [<ffffffff8109ab53>] ? sched_clock_local+0x12/0x72 [ 43.462494] [<ffffffff810ad781>] ? mark_lock+0x2e/0x224 [ 43.462494] [<ffffffff8109ada4>] ? sched_clock_cpu+0xa0/0xb9 [ 43.462494] [<ffffffff810aee37>] ? __lock_acquire+0x5fe/0xde4 [ 43.462494] [<ffffffff8119f570>] ? rcu_read_lock_held+0x36/0x38 [ 43.462494] [<ffffffff8119f75a>] ? __fcheck_files.isra.7+0x4b/0x57 [ 43.462494] [<ffffffff8119fbf2>] ? __fget_light+0x30/0x54 [ 43.462494] [<ffffffff81779012>] __sys_sendmsg+0x42/0x60 [ 43.462494] [<ffffffff81779042>] SyS_sendmsg+0x12/0x1c [ 43.462494] [<ffffffff819d24d2>] system_call_fastpath+0x16/0x1b 'p->h' could be NULL while 'cp->h' is always update to date. Fixes: commit 331b72922c5f58d48fd ("net: sched: RCU cls_tcindex") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-By: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-16net_sched: fix memory leak in cls_tcindexWANG Cong1-7/+10
Fixes: commit 331b72922c5f58d48fd ("net: sched: RCU cls_tcindex") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-By: John Fastabend <john.r.fastabend@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15openvswitch: Add recirc and hash action.Andy Zhou6-12/+262
Recirc action allows a packet to reenter openvswitch processing. currently openvswitch lookup flow for packet received and execute set of actions on that packet, with help of recirc action we can process/modify the packet and recirculate it back in openvswitch for another pass. OVS hash action calculates 5-tupple hash and set hash in flow-key hash. This can be used along with recirculation for distributing packets among different ports for bond devices. For example: OVS bonding can use following actions: Match on: bond flow; Action: hash, recirc(id) Match on: recirc-id == id and hash lower bits == a; Action: output port_bond_a Signed-off-by: Andy Zhou <azhou@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-09-15openvswitch: simplify sample action implementationAndy Zhou1-24/+18
The current sample() function implementation is more complicated than necessary in handling single user space action optimization and skb reference counting. There is no functional changes. Signed-off-by: Andy Zhou <azhou@nicira.com> Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-09-15openvswitch: Use tun_key only for egress tunnel path.Pravin B Shelar8-47/+50
Currently tun_key is used for passing tunnel information on ingress and egress path, this cause confusion. Following patch removes its use on ingress path make it egress only parameter. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Andy Zhou <azhou@nicira.com>
2014-09-15openvswitch: refactor ovs flow extract API.Pravin B Shelar7-41/+71
OVS flow extract is called on packet receive or packet execute code path. Following patch defines separate API for extracting flow-key in packet execute code path. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Andy Zhou <azhou@nicira.com>
2014-09-15openvswitch: Remove pkt_key from OVS_CBPravin B Shelar3-17/+16
OVS keeps pointer to packet key in skb->cb, but the packet key is store on stack. This could make code bit tricky. So it is better to get rid of the pointer. Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
2014-09-15net: dsa: fix mii_bus to host_dev replacementFlorian Fainelli1-1/+1
dsa_of_probe() still used cd->mii_bus instead of cd->host_dev when building with CONFIG_OF=y. Fix this by making the replacement here as well. Fixes: b4d2394d01b ("dsa: Replace mii_bus with a generic host device") Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15net_sched: use tcindex_filter_result_init()WANG Cong1-4/+1
Fixes: commit 331b72922c5f58d48fd ("net: sched: RCU cls_tcindex") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15net_sched: fix suspicious RCU usage in tcindex_classify()WANG Cong1-1/+1
This patch fixes the following kernel warning: [ 44.805900] [ INFO: suspicious RCU usage. ] [ 44.808946] 3.17.0-rc4+ #610 Not tainted [ 44.811831] ------------------------------- [ 44.814873] net/sched/cls_tcindex.c:84 suspicious rcu_dereference_check() usage! Fixes: commit 331b72922c5f58d48fd ("net: sched: RCU cls_tcindex") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15net_sched: fix an allocation bug in tcindex_set_parms()WANG Cong1-1/+1
Fixes: commit 331b72922c5f58d48fd ("net: sched: RCU cls_tcindex") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15net_sched: fix suspicious RCU usage in cls_bpf_classify()WANG Cong1-1/+1
Fixes: commit 1f947bf151e90ec0baad2948 ("net: sched: rcu'ify cls_bpf") Cc: John Fastabend <john.fastabend@gmail.com> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: John Fastabend <john.r.fastabend@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15dsa: Replace mii_bus with a generic host deviceAlexander Duyck2-17/+9
This change makes it so that instead of passing and storing a mii_bus we instead pass and store a host_dev. From there we can test to determine the exact type of device, and can verify it is the correct device for our switch. So for example it would be possible to pass a device pointer from a pci_dev and instead of checking for a PHY ID we could check for a vendor and/or device ID. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15dsa: Split ops up, and avoid assigning tag_protocol and receive separatelyAlexander Duyck7-31/+53
This change addresses several issues. First, it was possible to set tag_protocol without setting the ops pointer. To correct that I have reordered things so that rcv is now populated before we set tag_protocol. Second, it didn't make much sense to keep setting the device ops each time a new slave was registered. So by moving the receive portion out into root switch initialization that issue should be addressed. Third, I wanted to avoid sending tags if the rcv pointer was not registered so I changed the tag check to verify if the rcv function pointer is set on the root tree. If it is then we start sending DSA tagged frames. Finally I split the device ops pointer in the structures into two spots. I placed the rcv function pointer in the root switch since this makes it easiest to access from there, and I placed the xmit function pointer in the slave for the same reason. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15tcp: do not copy headers in tcp_collapse()Eric Dumazet1-15/+2
tcp_collapse() wants to shrink skb so that the overhead is minimal. Now we store tcp flags into TCP_SKB_CB(skb)->tcp_flags, we no longer need to keep around full headers. Whole available space is dedicated to the payload. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15tcp: allow segment with FIN in tcp_try_coalesce()Eric Dumazet2-4/+3
We can allow a segment with FIN to be aggregated, if we take care to add tcp flags, and if skb_try_coalesce() takes care of zero sized skbs. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-15tcp: use TCP_SKB_CB(skb)->tcp_flags in input pathEric Dumazet4-13/+17
Input path of TCP do not currently uses TCP_SKB_CB(skb)->tcp_flags, which is only used in output path. tcp_recvmsg(), looks at tcp_hdr(skb)->syn for every skb found in receive queue, and its unfortunate because this bit is located in a cache line right before the payload. We can simplify TCP by copying tcp flags into TCP_SKB_CB(skb)->tcp_flags. This patch does so, and avoids the cache line miss in tcp_recvmsg() Following patches will - allow a segment with FIN being coalesced in tcp_try_coalesce() - simplify tcp_collapse() by not copying the headers. Signed-off-by: Eric Dumazet <edumazet@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: bpf: correctly handle errors in sk_attach_filter()Sasha Levin1-2/+2
Commit "net: bpf: make eBPF interpreter images read-only" has changed bpf_prog to be vmalloc()ed but never handled some of the errors paths of the old code. On error within sk_attach_filter (which userspace can easily trigger), we'd kfree() the vmalloc()ed memory, and leak the internal bpf_work_struct. Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: filter: constify detection of pkt_type_offsetHannes Frederic Sowa1-29/+2
Currently we have 2 pkt_type_offset functions doing the same thing and spread across the architecture files. Remove those and replace them with a PKT_TYPE_OFFSET macro helper which gets the constant value from a zero sized sk_buff member right in front of the bitfield with offsetof. This new offset marker does not change size of struct sk_buff. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Daniel Borkmann <dborkman@redhat.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org> Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Acked-by: Alexei Starovoitov <ast@plumgrid.com> Acked-by: Daniel Borkmann <dborkman@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: dsa: change tag_protocol to an enumFlorian Fainelli2-5/+4
Now that we introduced an additional multiplexing/demultiplexing layer with commit 3e8a72d1dae37 ("net: dsa: reduce number of protocol hooks") that lives within the DSA code, we no longer need to have a given switch driver tag_protocol be an actual ethertype value, instead, we can replace it with an enum: dsa_tag_protocol. Do this replacement in the drivers, which allows us to get rid of the cpu_to_be16()/htons() dance, and remove ETH_P_BRCMTAG since we do not need it anymore. Suggested-by: Alexander Duyck <alexander.duyck@gmail.com> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: exit early in addrconf_notify() if IPv6 is disabledWANG Cong1-0/+3
If IPv6 is explicitly disabled before the interface comes up, it makes no sense to continue when it comes up, even just print a message. (I am not sure about other cases though, so I prefer not to touch) Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: refactor ipv6_dev_mc_inc()WANG Cong1-33/+49
Refactor out allocation and initialization and make the refcount code more readable. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: update the comment in mcast.cWANG Cong1-7/+5
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: drop some rcu_read_lock in mcastWANG Cong1-13/+4
Similarly the code is already protected by rtnl lock. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: drop ipv6_sk_mc_lock in mcastWANG Cong1-16/+2
Similarly the code is already protected by rtnl lock. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: refactor __ipv6_dev_ac_inc()WANG Cong1-23/+39
Refactor out allocation and initialization and make the refcount code more readable. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: clean up ipv6_dev_ac_inc()WANG Cong2-10/+5
Make it accept inet6_dev, and rename it to __ipv6_dev_ac_inc() to reflect this change. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: remove ipv6_sk_ac_lockWANG Cong1-14/+3
Just move rtnl lock up, so that the anycast list can be protected by rtnl lock now. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13ipv6: drop useless rcu_read_lock() in anycastWANG Cong2-18/+14
These code is now protected by rtnl lock, rcu read lock is useless now. Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: rcu'ify cls_bpfJohn Fastabend1-47/+47
This patch makes the cls_bpf classifier RCU safe. The tcf_lock was being used to protect a list of cls_bpf_prog now this list is RCU safe and updates occur with rcu_replace. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: rcu'ify cls_rsvpJohn Fastabend1-70/+90
Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: make cls_u32 locklessJohn Fastabend1-73/+110
Make cls_u32 classifier safe to run without holding lock. This patch converts statistics that are kept in read section u32_classify into per cpu counters. This patch was tested with a tight u32 filter add/delete loop while generating traffic with pktgen. By running pktgen on vlan devices created on top of a physical device we can hit the qdisc layer correctly. For ingress qdisc's a loopback cable was used. for i in {1..100}; do q=`echo $i%8|bc`; echo -n "u32 tos: iteration $i on queue $q"; tc filter add dev p3p2 parent $p prio $i u32 match ip tos 0x10 0xff \ action skbedit queue_mapping $q; sleep 1; tc filter del dev p3p2 prio $i; echo -n "u32 tos hash table: iteration $i on queue $q"; tc filter add dev p3p2 parent $p protocol ip prio $i handle 628: u32 divisor 1 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ match ip protocol 17 0xff link 628: offset at 0 mask 0xf00 shift 6 plus 0 tc filter add dev p3p2 parent $p protocol ip prio $i u32 \ ht 628:0 match ip tos 0x10 0xff action skbedit queue_mapping $q sleep 2; tc filter del dev p3p2 prio $i sleep 1; done Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: make cls_u32 per cpuJohn Fastabend1-16/+59
This uses per cpu counters in cls_u32 in preparation to convert over to rcu. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: RCU cls_tcindexJohn Fastabend1-94/+154
Make cls_tcindex RCU safe. This patch addds a new RCU routine rcu_dereference_bh_rtnl() to check caller either holds the rcu read lock or RTNL. This is needed to handle the case where tcindex_lookup() is being called in both cases. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: RCU cls_routeJohn Fastabend1-94/+132
RCUify the route classifier. For now however spinlock's are used to protect fastmap cache. The issue here is the fastmap may be read by one CPU while the cache is being updated by another. An array of pointers could be one possible solution. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: fw use RCUJohn Fastabend1-34/+77
RCU'ify fw classifier. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: cls_flow use RCUJohn Fastabend1-61/+84
Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: cls_cgroup use RCUJohn Fastabend1-24/+39
Make cgroup classifier safe for RCU. Also drops the calls in the classify routine that were doing a rcu_read_lock()/rcu_read_unlock(). If the rcu_read_lock() isn't held entering this routine we have issues with deleting the classifier chain so remove the unnecessary rcu_read_lock()/rcu_read_unlock() pair noting all paths AFAIK hold rcu_read_lock. If there is a case where classify is called without the rcu read lock then an rcu splat will occur and we can correct it. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: sched: cls_basic use RCUJohn Fastabend1-35/+45
Enable basic classifier for RCU. Dereferencing tp->root may look a bit strange here but it is needed by my accounting because it is allocated at init time and needs to be kfree'd at destroy time. However because it may be referenced in the classify() path we must wait an RCU grace period before free'ing it. We use kfree_rcu() and rcu_ APIs to enforce this. This pattern is used in all the classifiers. Also the hgenerator can be incremented without concern because it is always incremented under RTNL. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: rcu-ify tcf_protoJohn Fastabend16-84/+116
rcu'ify tcf_proto this allows calling tc_classify() without holding any locks. Updaters are protected by RTNL. This patch prepares the core net_sched infrastracture for running the classifier/action chains without holding the qdisc lock however it does nothing to ensure cls_xxx and act_xxx types also work without locking. Additional patches are required to address the fall out. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-13net: qdisc: use rcu prefix and silence sparse warningsJohn Fastabend4-11/+63
Add __rcu notation to qdisc handling by doing this we can make smatch output more legible. And anyways some of the cases should be using rcu_dereference() see qdisc_all_tx_empty(), qdisc_tx_chainging(), and so on. Also *wake_queue() API is commonly called from driver timer routines without rcu lock or rtnl lock. So I added rcu_read_lock() blocks around netif_wake_subqueue and netif_tx_wake_queue. Signed-off-by: John Fastabend <john.r.fastabend@intel.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-12udp: Fix inverted NAPI_GRO_CB(skb)->flush testScott Wood2-2/+2
Commit 2abb7cdc0d ("udp: Add support for doing checksum unnecessary conversion") caused napi_gro_cb structs with the "flush" field zero to take the "udp_gro_receive" path rather than the "set flush to 1" path that they would previously take. As a result I saw booting from an NFS root hang shortly after starting userspace, with "server not responding" messages. This change to the handling of "flush == 0" packets appears to be incidental to the goal of adding new code in the case where skb_gro_checksum_validate_zero_check() returns zero. Based on that and the fact that it breaks things, I'm assuming that it is unintentional. Fixes: 2abb7cdc0d ("udp: Add support for doing checksum unnecessary conversion") Cc: Tom Herbert <therbert@google.com> Signed-off-by: Scott Wood <scottwood@freescale.com> Acked-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2014-09-12mac80211: Resolve sk_refcnt/sk_wmem_alloc issue in wifi ack pathAlexander Duyck2-11/+9
There is a possible issue with the use, or lack thereof of sk_refcnt and sk_wmem_alloc in the wifi ack status functionality. Specifically if a socket were to request acknowledgements, and the socket were to have sk_refcnt drop to 0 resulting in it waiting on sk_wmem_alloc to reach 0 it would be possible to have sock_queue_err_skb orphan the last buffer, resulting in __sk_free being called on the socket. After this the buffer is enqueued on sk_error_queue, however the queue has already been flushed resulting in at least a memory leak, if not a data corruption. Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com> Acked-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
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