- 11 Dec, 2014 4 commits
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Nimrod Andy authored
For i.MX6SX FEC controller, there have interrupt mask and event field extension. To support all SOCs FEC, we clear all interrupt events during MAVC initial process. Signed-off-by:
Fugang Duan <B38611@freescale.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Nimrod Andy authored
On some i.MX6 serial boards, phy power and refrence clock are supplied or controlled by SOC. When do suspend/resume test, the power and clock are disabled, so phy device link down. For current driver, fep->link is still up status, which cause extra operation like below code. To avoid the dumy operation, we set fep->link to down when phy device is real down. ... if (fep->link) { napi_disable(&fep->napi); netif_tx_lock_bh(ndev); fec_stop(ndev); netif_tx_unlock_bh(ndev); napi_enable(&fep->napi); fep->link = phy_dev->link; status_change = 1; } ... Signed-off-by:
Fugang Duan <B38611@freescale.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexei Starovoitov authored
0day robot reported the following crash: [ 21.233581] BUG: unable to handle kernel NULL pointer dereference at 0000000000000007 [ 21.234709] IP: [<ffffffff8156ebda>] sk_attach_bpf+0x39/0xc2 It's due to bpf_prog_get() returning ERR_PTR. Check it properly. Reported-by:
Fengguang Wu <fengguang.wu@intel.com> Fixes: 89aa0758 ("net: sock: allow eBPF programs to be attached to sockets") Signed-off-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Gu Zheng authored
Introduce helper macro for_each_cmsghdr as a wrapper of the enumerating cmsghdr from msghdr, just cleanup. Signed-off-by:
Gu Zheng <guz.fnst@cn.fujitsu.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 10 Dec, 2014 32 commits
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Stephen Rothwell authored
Signed-off-by:
Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller authored
Conflicts: drivers/net/ethernet/amd/xgbe/xgbe-desc.c drivers/net/ethernet/renesas/sh_eth.c Overlapping changes in both conflict cases. Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
Making things const is a good thing. (x86-64 defconfig with all irda) $ size net/irda/built-in.o* text data bss dec hex filename 109276 1868 244 111388 1b31c net/irda/built-in.o.new 108828 2316 244 111388 1b31c net/irda/built-in.o.old Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
It's better when function pointer arrays aren't modifiable. Net change: $ size net/llc/built-in.o.* text data bss dec hex filename 61193 12758 1344 75295 1261f net/llc/built-in.o.new 47113 27030 1344 75487 126df net/llc/built-in.o.old Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
It's better when function pointer arrays aren't modifiable. Net change from original: $ size net/llc/built-in.o.* text data bss dec hex filename 61065 12886 1344 75295 1261f net/llc/built-in.o.new 47113 27030 1344 75487 126df net/llc/built-in.o.old Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Joe Perches authored
It's better when function pointer arrays aren't modifiable. Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Daniel Borkmann says: ==================== Kill arch_fast_hash Due to the size of changes I have based this against net-next, also given 3.18 is already out. I've split this into 3 parts, the first two to remove existing users (so they can optionally go to stable) and the last one to kill the remaining library bits. Let me know if there are any issues. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
As there are now no remaining users of arch_fast_hash(), lets kill it entirely. This basically reverts commit 71ae8aac ("lib: introduce arch optimized hash library") and follow-up work, that is f.e., commit 23721754 ("lib: hash: follow-up fixups for arch hash"), commit e3fec2f7 ("lib: Add missing arch generic-y entries for asm-generic/hash.h") and last but not least commit 6a02652d ("perf tools: Fix include for non x86 architectures"). Cc: Francesco Fusco <fusco@ntop.org> Cc: Thomas Graf <tgraf@suug.ch> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
This patch effectively reverts commit 500f8087 ("net: ovs: use CRC32 accelerated flow hash if available"), and other remaining arch_fast_hash() users such as from nfsd via commit 6282cd56 ("NFSD: Don't hand out delegations for 30 seconds after recalling them.") where it has been used as a hash function for bloom filtering. While we think that these users are actually not much of concern, it has been requested to remove the arch_fast_hash() library bits that arose from [1] entirely as per recent discussion [2]. The main argument is that using it as a hash may introduce bias due to its linearity (see avalanche criterion) and thus makes it less clear (though we tried to document that) when this security/performance trade-off is actually acceptable for a general purpose library function. Lets therefore avoid any further confusion on this matter and remove it to prevent any future accidental misuse of it. For the time being, this is going to make hashing of flow keys a bit more expensive in the ovs case, but future work could reevaluate a different hashing discipline. [1] https://patchwork.ozlabs.org/patch/299369/ [2] https://patchwork.ozlabs.org/patch/418756/ Cc: Neil Brown <neilb@suse.de> Cc: Francesco Fusco <fusco@ntop.org> Cc: Jesse Gross <jesse@nicira.com> Cc: Thomas Graf <tgraf@suug.ch> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Daniel Borkmann authored
For netlink, we shouldn't be using arch_fast_hash() as a hashing discipline, but rather jhash() instead. Since netlink sockets can be opened by any user, a local attacker would be able to easily create collisions with the DPDK-derived arch_fast_hash(), which trades off performance for security by using crc32 CPU instructions on x86_64. While it might have a legimite use case in other places, it should be avoided in netlink context, though. As rhashtable's API is very flexible, we could later on still decide on other hashing disciplines, if legitimate. Reference: http://thread.gmane.org/gmane.linux.kernel/1844123 Fixes: e341694e ("netlink: Convert netlink_lookup() to use RCU protected hash table") Cc: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by:
Daniel Borkmann <dborkman@redhat.com> Acked-by:
Thomas Graf <tgraf@suug.ch> Acked-by:
Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Tilman Schmidt says: ==================== ISDN patches for net-next Here's a series of patches for the Gigaset ISDN driver and one for the ISDN CAPI subsystem. Please merge as appropriate. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tilman Schmidt authored
Utility function command_2_index is always called with arguments of type u8. Adapt its declaration accordingly. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tilman Schmidt authored
Kernel CAPI has been the recommended ISDN subsystem for the Gigaset driver since kernel release 2.6.34.2. It provides full backwards compatibility to the old I4L subsystem thanks to the capidrv module. I4L has been marked as deprecated for more than seven years. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tilman Schmidt authored
No need to pass a member of the cardstate structure as a separate argument if the entire structure is already passed. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tilman Schmidt authored
Replace the flag-controlled retry loop by explicit goto statements in the error branches to make the control structure easier to understand. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Tilman Schmidt authored
Function gigaset_skb_sent was declared twice, identically, in gigaset.h. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Richard Alpe authored
commit 908344cd ("tipc: fix bug in multicast congestion handling") introduced a race in the broadcast link wakeup functionality. This patch eliminates this broadcast link wakeup race caused by operation on the wakeup list without proper locking. If this race hit and corrupted the list all subsequent wakeup messages would be lost, resulting in a considerable memory leak. Signed-off-by:
Richard Alpe <richard.alpe@ericsson.com> Signed-off-by:
Erik Hugne <erik.hugne@ericsson.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Govindarajulu Varadarajan authored
This patch adds support for setting/getting rss hash key using ethtool. v2: respin patch to support RSS hash function changes. Signed-off-by:
Govindarajulu Varadarajan <_govind@gmx.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David S. Miller authored
Alexander Duyck says: ==================== net: Alloc NAPI page frags from their own pool This patch series implements a means of allocating page fragments without the need for the local_irq_save/restore in __netdev_alloc_frag. By doing this I am able to decrease packet processing time by 11ns per packet in my test environment. ==================== Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This patch replaces the calls to netdev_alloc_skb_ip_align in the copybreak paths. Cc: Gary Zambrano <zambrano@broadcom.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Ariel Elior <ariel.elior@qlogic.com> Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This replaces most of the calls to netdev_alloc_skb_ip_align in the Realtek drivers. The one instance I didn't replace in 8139cp.c is because it was called as a part of init and as such is not always accessed from the softirq context. Cc: Realtek linux nic maintainers <nic_swsd@realtek.com> Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
In order to use napi_alloc_skb I needed to pass a pointer to struct adapter instead of struct pci_dev. This allowed me to access &adapter->napi. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This change replaces calls to netdev_alloc_skb_ip_align with napi_alloc_skb. The advantage of napi_alloc_skb is currently the fact that the page allocation doesn't make use of any irq disable calls. There are few spots where I couldn't replace the calls as the buffer allocation routine is called as a part of init which is outside of the softirq context. Cc: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This change pulls the core functionality out of __netdev_alloc_skb and places them in a new function named __alloc_rx_skb. The reason for doing this is to make these bits accessible to a new function __napi_alloc_skb. In addition __alloc_rx_skb now has a new flags value that is used to determine which page frag pool to allocate from. If the SKB_ALLOC_NAPI flag is set then the NAPI pool is used. The advantage of this is that we do not have to use local_irq_save/restore when accessing the NAPI pool from NAPI context. In my test setup I saw at least 11ns of savings using the napi_alloc_skb function versus the netdev_alloc_skb function, most of this being due to the fact that we didn't have to call local_irq_save/restore. The main use case for napi_alloc_skb would be for things such as copybreak or page fragment based receive paths where an skb is allocated after the data has been received instead of before. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alexander Duyck authored
This patch splits the netdev_alloc_frag function up so that it can be used on one of two page frag pools instead of being fixed on the netdev_alloc_cache. By doing this we can add a NAPI specific function __napi_alloc_frag that accesses a pool that is only used from softirq context. The advantage to this is that we do not need to call local_irq_save/restore which can be a significant savings. I also took the opportunity to refactor the core bits that were placed in __alloc_page_frag. First I updated the allocation to do either a 32K allocation or an order 0 page. This is based on the changes in commmit d9b2938a where it was found that latencies could be reduced in case of failures. Then I also rewrote the logic to work from the end of the page to the start. By doing this the size value doesn't have to be used unless we have run out of space for page fragments. Finally I cleaned up the atomic bits so that we just do an atomic_sub_and_test and if that returns true then we set the page->_count via an atomic_set. This way we can remove the extra conditional for the atomic_read since it would have led to an atomic_inc in the case of success anyway. Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Acked-by:
Alexei Starovoitov <ast@plumgrid.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfsDavid S. Miller authored
More iov_iter work for the networking from Al Viro. Signed-off-by:
David S. Miller <davem@davemloft.net>
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Flavio Leitner authored
Use MODULE_VERSION() now that dummy driver has a version. Signed-off-by:
Flavio Leitner <fbl@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jiri Pirko authored
To cancel nesting, this function is more convenient. Signed-off-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Valdis.Kletnieks@vt.edu authored
commit 46e5da40 (net: qdisc: use rcu prefix and silence sparse warnings) triggers a spurious warning: net/sched/sch_fq_codel.c:97 suspicious rcu_dereference_check() usage! The code should be using the _bh variant of rcu_dereference. Signed-off-by:
Valdis Kletnieks <valdis.kletnieks@vt.edu> Acked-by:
Eric Dumazet <edumazet@google.com> Acked-by:
John Fastabend <john.r.fastabend@intel.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Lendacky, Thomas authored
The disable_irq_nosync function, not the disable_irq function, must be used to disable the DMA channel interrupt from within the interrupt service routine. Change the disable_irq call to disable_irq_nosync. Signed-off-by:
Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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David Vrabel authored
Commit 97a6d1bb (xen-netfront: Fix handling packets on compound pages with skb_linearize) attempted to fix a problem where an skb that would have required too many slots would be dropped causing TCP connections to stall. However, it filled in the first slot using the original buffer and not the new one and would use the wrong offset and grant access to the wrong page. Netback would notice the malformed request and stop all traffic on the VIF, reporting: vif vif-3-0 vif3.0: txreq.offset: 85e, size: 4002, end: 6144 vif vif-3-0 vif3.0: fatal error; disabling device Reported-by:
Anthony Wright <anthony@overnetdata.com> Tested-by:
Anthony Wright <anthony@overnetdata.com> Signed-off-by:
David Vrabel <david.vrabel@citrix.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Eric Dumazet authored
When I cooked commit c3658e8d ("tcp: fix possible NULL dereference in tcp_vX_send_reset()") I missed other spots we could deref a NULL skb_dst(skb) Again, if a socket is provided, we do not need skb_dst() to get a pointer to network namespace : sock_net(sk) is good enough. Reported-by:
Dann Frazier <dann.frazier@canonical.com> Bisected-by:
Dann Frazier <dann.frazier@canonical.com> Tested-by:
Dann Frazier <dann.frazier@canonical.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Fixes: ca777eff ("tcp: remove dst refcount false sharing for prequeue mode") Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 09 Dec, 2014 4 commits
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Jan Beulich authored
When xenvif_alloc() fails, it returns a non-NULL error indicator. To avoid eventual races, we shouldn't store that into struct backend_info as readers of it only check for NULL. Signed-off-by:
Jan Beulich <jbeulich@suse.com> Acked-by:
Ian Campbell <ian.campbell@citrix.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Nimrod Andy authored
On i.MX6SX sabreauto board, when there have no phy daughter board connection, there have kernel crash by NULL pointer: fec 2188000.ethernet eth0: could not attach to PHY Unable to handle kernel NULL pointer dereference at virtual address 00000220 pgd = 80004000 [00000220] *pgd=00000000 Internal error: Oops: 5 [#1] PREEMPT SMP ARM Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.14.24-01042-g27eaeea-dirty #405 task: d8078000 ti: d8076000 task.ti: d8076000 PC is at mutex_lock+0x10/0x54 LR is at phy_start+0x14/0x68 pc : [<806ad4e4>] lr : [<803b0f90>] psr: 60000113 sp : d8077d80 ip : 00000000 fp : d83cc000 r10: 0000100c r9 : d83cc800 r8 : 00000000 r7 : d83bcd0c r6 : 00000200 r5 : 00000220 r4 : 00000220 r3 : 00000000 r2 : 00000000 r1 : d83bcd90 r0 : 00000220 Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel Control: 10c5387d Table: 8000404a DAC: 00000015 Process swapper/0 (pid: 1, stack limit = 0xd8076240) Stack: (0xd8077d80 to 0xd8078000) 7d80: 00000000 803b0f90 00000001 00000000 d83bc800 803be034 00000007 805c3fb4 7da0: 00000003 80d4e0bc 805efcb8 fffffff1 fffffff0 00000000 00000000 d8077dfc 7dc0: 0000000d 80d6ce80 80d126b0 800499c8 d83bc800 d83bc800 806f0f40 d83bc82c 7de0: 00000000 00000000 80d6ce80 80d126b0 0000016b 80540250 d8076008 d83bc800 7e00: 0000016b d83bc800 00001003 00000001 00001002 805404d4 d83bc800 00000120 7e20: 00001002 00001002 00000000 805405d4 d83bc800 00000001 80d126c0 00001002 7e40: 80dbc5dc 80d02024 00000000 806ae360 00000002 d6128420 d6127198 12400000 7e60: 00000000 00000000 00000002 d61271e8 00000000 12400000 d801674c 800e49f0 7e80: d6127198 d6124e58 00000000 80238848 d61271c4 00000000 00000001 d8016700 7ea0: 80dd2e00 80d752c0 80d752c0 80cfdaec 0000010c 80239430 806c2e90 d800f080 7ec0: d800f380 804e46b4 ffffffbc 80d15cb0 00000007 80d752c0 80d752c0 80d01e94 7ee0: 0000010c d8076030 00000000 800088cc 80dbaba4 80bd411c d80a6f00 806b1e04 7f00: 00000000 00000000 00000000 80125b84 00000000 80d2c56c 60000113 00000001 7f20: ef7ff9df 806c80cc 0000010c 80043f5c 80c95eb8 00000007 ef7ffa1d 00000007 7f40: 80d2c55c 80d15cb0 00000007 80d752c0 80d752c0 80ccc50c 0000010c 80d0a114 7f60: 80d0a10c 80cccc04 00000007 00000007 80ccc50c 806ae410 00000000 8004cb84 7f80: 80d17bc0 00000000 806a4bd4 00000000 00000000 00000000 00000000 00000000 7fa0: 00000000 806a4bdc 00000000 8000e5f8 00000000 00000000 00000000 00000000 7fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 7fe0: 00000000 00000000 00000000 00000000 00000013 00000000 1e79a7bb e5337f77 [<806ad4e4>] (mutex_lock) from [<803b0f90>] (phy_start+0x14/0x68) [<803b0f90>] (phy_start) from [<803be034>] (fec_enet_open+0x448/0x5dc) [<803be034>] (fec_enet_open) from [<80540250>] (__dev_open+0xa8/0x110) [<80540250>] (__dev_open) from [<805404d4>] (__dev_change_flags+0x88/0x170) [<805404d4>] (__dev_change_flags) from [<805405d4>] (dev_change_flags+0x18/0x48) [<805405d4>] (dev_change_flags) from [<80d02024>] (ip_auto_config+0x190/0xf94) [<80d02024>] (ip_auto_config) from [<800088cc>] (do_one_initcall+0xe8/0x144) [<800088cc>] (do_one_initcall) from [<80cccc04>] (kernel_init_freeable+0x104/0x1c8) [<80cccc04>] (kernel_init_freeable) from [<806a4bdc>] (kernel_init+0x8/0xec) [<806a4bdc>] (kernel_init) from [<8000e5f8>] (ret_from_fork+0x14/0x3c) Code: e92d4010 e3a03000 e1a04000 ee073fba (e1903f9f) Add phydev check to fix the issue. Signed-off-by:
Fugang Duan <B38611@freescale.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Ying Xue authored
The commit fb9962f3 ("tipc: ensure all name sequences are properly protected with its lock") involves below errors: net/tipc/name_table.c:980 tipc_purge_publications() error: double lock 'spin_lock:&seq->lock' Reported-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
Ying Xue <ying.xue@windriver.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Florian Fainelli authored
Hook a ndo_set_mac_address callback, update the internal Ethernet MAC in the netdevice structure, and finally write that address down to the UniMAC registers. If the interface is down, and most likely clock gated, we do not update the registers but just the local copy, such that next ndo_open() call will effectively write down the address. Signed-off-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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