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| author | Pravin B Shelar <pshelar@nicira.com> | 2013-02-24 20:05:12 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-02-25 15:47:41 -0500 |
| commit | 7992ae6df9733677fcc2e63c40b97854c605c399 (patch) | |
| tree | a635fc0439ee21acbb1fcbad4cf7584dd4912978 /net/ipv4/ip_gre.c | |
| parent | 8f10098fb978c3cdd8ee7d72f7aa4330873f4544 (diff) | |
| download | lwn-7992ae6df9733677fcc2e63c40b97854c605c399.tar.gz lwn-7992ae6df9733677fcc2e63c40b97854c605c399.zip | |
Revert "ip_gre: propogate target device GSO capability to the tunnel device"
This reverts commit eb6b9a8cad65e820b145547844b108117cece3a0.
Above commit limits GSO capability of gre device to just TSO, but
software GRE-GSO is capable of handling all GSO capabilities.
This patch also fixes following panic which reverted commit introduced:-
BUG: unable to handle kernel NULL pointer dereference at 00000000000000a2
IP: [<ffffffffa0680fd1>] ipgre_tunnel_bind_dev+0x161/0x1f0 [ip_gre]
PGD 42bc19067 PUD 42bca9067 PMD 0
Oops: 0000 [#1] SMP
Pid: 2636, comm: ip Tainted: GF 3.8.0+ #83 Dell Inc. PowerEdge R620/0KCKR5
RIP: 0010:[<ffffffffa0680fd1>] [<ffffffffa0680fd1>] ipgre_tunnel_bind_dev+0x161/0x1f0 [ip_gre]
RSP: 0018:ffff88042bfcb708 EFLAGS: 00010246
RAX: 00000000000005b6 RBX: ffff88042d2fa000 RCX: 0000000000000044
RDX: 0000000000000018 RSI: 0000000000000078 RDI: 0000000000000060
RBP: ffff88042bfcb748 R08: 0000000000000018 R09: 000000000000000c
R10: 0000000000000020 R11: 000000000101010a R12: ffff88042d2fa800
R13: 0000000000000000 R14: ffff88042d2fa800 R15: ffff88042cd7f650
FS: 00007fa784f55700(0000) GS:ffff88043fd20000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000000000a2 CR3: 000000042d8b9000 CR4: 00000000000407e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process ip (pid: 2636, threadinfo ffff88042bfca000, task ffff88042d142a80)
Stack:
0000000100000000 002f000000000000 0a01010100000000 000000000b010101
ffff88042d2fa800 ffff88042d2fa000 ffff88042bfcb858 ffff88042f418c00
ffff88042bfcb798 ffffffffa068199a ffff88042bfcb798 ffff88042d2fa830
Call Trace:
[<ffffffffa068199a>] ipgre_newlink+0xca/0x160 [ip_gre]
[<ffffffff8143b692>] rtnl_newlink+0x532/0x5f0
[<ffffffff8143b2fc>] ? rtnl_newlink+0x19c/0x5f0
[<ffffffff81438978>] rtnetlink_rcv_msg+0x2c8/0x340
[<ffffffff814386b0>] ? rtnetlink_rcv+0x40/0x40
[<ffffffff814560f9>] netlink_rcv_skb+0xa9/0xd0
[<ffffffff81438695>] rtnetlink_rcv+0x25/0x40
[<ffffffff81455ddc>] netlink_unicast+0x1ac/0x230
[<ffffffff81456a45>] netlink_sendmsg+0x265/0x380
[<ffffffff814138c0>] sock_sendmsg+0xb0/0xe0
[<ffffffff8141141e>] ? move_addr_to_kernel+0x4e/0x90
[<ffffffff81420445>] ? verify_iovec+0x85/0xf0
[<ffffffff81414ffd>] __sys_sendmsg+0x3fd/0x420
[<ffffffff8114b701>] ? handle_mm_fault+0x251/0x3b0
[<ffffffff8114f39f>] ? vma_link+0xcf/0xe0
[<ffffffff81415239>] sys_sendmsg+0x49/0x90
[<ffffffff814ffd19>] system_call_fastpath+0x16/0x1b
CC: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: Pravin B Shelar <pshelar@nicira.com>
Acked-by: Dmitry Kravkov <dmitry@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ip_gre.c')
| -rw-r--r-- | net/ipv4/ip_gre.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c index 406512934507..d0ef0e674ec5 100644 --- a/net/ipv4/ip_gre.c +++ b/net/ipv4/ip_gre.c @@ -1106,14 +1106,8 @@ static int ipgre_tunnel_bind_dev(struct net_device *dev) tunnel->hlen = addend; /* TCP offload with GRE SEQ is not supported. */ if (!(tunnel->parms.o_flags & GRE_SEQ)) { - /* device supports enc gso offload*/ - if (tdev->hw_enc_features & NETIF_F_GRE_GSO) { - dev->features |= NETIF_F_TSO; - dev->hw_features |= NETIF_F_TSO; - } else { - dev->features |= NETIF_F_GSO_SOFTWARE; - dev->hw_features |= NETIF_F_GSO_SOFTWARE; - } + dev->features |= NETIF_F_GSO_SOFTWARE; + dev->hw_features |= NETIF_F_GSO_SOFTWARE; } return mtu; |