- Jan 19, 2013
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Mugunthan V N authored
When there is heavy transmission traffic in the CPDMA, then Rx descriptors memory is also utilized as tx desc memory looses all rx descriptors and the driver stops working then. This patch adds boundary for tx and rx descriptors in bd ram dividing the descriptor memory to ensure that during heavy transmission tx doesn't use rx descriptors. This patch is already applied to davinci_emac driver, since CPSW and davici_dmac shares the same CPDMA, moving the boundry seperation from Davinci EMAC driver to CPDMA driver which was done in the following commit commit 86d8c07f Author: Sascha Hauer <s.hauer@pengutronix.de> Date: Tue Jan 3 05:27:47 2012 +0000 net/davinci: do not use all descriptors for tx packets The driver uses a shared pool for both rx and tx descriptors. During open it queues fixed number of 128 descriptors for receive packets. For each received packet it tries to queue another descriptor. If this fails the descriptor is lost for rx. The driver has no limitation on tx descriptors to use, so it can happen during a nmap / ping -f attack that the driver allocates all descriptors for tx and looses all rx descriptors. The driver stops working then. To fix this limit the number of tx descriptors used to half of the descriptors available, the rx path uses the other half. Tested on a custom board using nmap / ping -f to the board from two different hosts. Signed-off-by:
Mugunthan V N <mugunthanvnm@ti.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Alan Ott authored
Handle the reception of uncompressed packets (dispatch type = IPv6). Signed-off-by:
Alan Ott <alan@signal11.us> Signed-off-by:
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Alan Ott authored
Refactor the handing of the skb's to the individual lowpan devices into a function. Signed-off-by:
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Frank Li authored
The limition of imx6 internal bus cause fec can't achieve 1G perfomance. There will be many packages lost because FIFO over run. This patch enable pause frame flow control. Before this patch iperf -s -i 1 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 10.192.242.153 port 5001 connected with 10.192.242.94 port 49773 [ ID] Interval Transfer Bandwidth [ 4] 0.0- 1.0 sec 6.35 MBytes 53.3 Mbits/sec [ 4] 1.0- 2.0 sec 3.39 MBytes 28.5 Mbits/sec [ 4] 2.0- 3.0 sec 2.63 MBytes 22.1 Mbits/sec [ 4] 3.0- 4.0 sec 1.10 MBytes 9.23 Mbits/sec ifconfig RX packets:46195 errors:1859 dropped:1 overruns:1859 frame:1859 After this patch iperf -s -i 1 [ 4] local 10.192.242.153 port 5001 connected with 10.192.242.94 port 49757 [ ID] Interval Transfer Bandwidth [ 4] 0.0- 1.0 sec 49.8 MBytes 418 Mbits/sec [ 4] 1.0- 2.0 sec 50.1 MBytes 420 Mbits/sec [ 4] 2.0- 3.0 sec 47.5 MBytes 399 Mbits/sec [ 4] 3.0- 4.0 sec 45.9 MBytes 385 Mbits/sec [ 4] 4.0- 5.0 sec 44.8 MBytes 376 Mbits/sec ifconfig RX packets:2348454 errors:0 dropped:16 overruns:0 frame:0 Signed-off-by:
Frank Li <Frank.Li@freescale.com> Signed-off-by:
Fugang Duan <B38611@freescale.com> Signed-off-by:
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Lucas Stach authored
ASIX AX88772B started to pack data even more tightly. Packets and the ASIX packet header may now cross URB boundaries. To handle this we have to introduce some state between individual calls to asix_rx_fixup(). Signed-off-by:
Lucas Stach <dev@lynxeye.de> Signed-off-by:
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Lucas Stach authored
The device comes up with a MAC address of all zeros. We need to read the initial device MAC from EEPROM so it can be set properly later. Signed-off-by:
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David S. Miller authored
Jeff Kirsher says: ==================== This series contains updates to e1000e and igb. Most notably is the added timestamp support in e1000e and additional software timestamp support in igb. As well as, the added thermal data support and SR-IOV configuration support in igb. v2- dropped the following patches from the previous 14 patch series because changes were requested from the community: e1000e: add support for IEEE-1588 PTP igb: Report L4 Rx hash via skb->l4_rxhash ==================== Signed-off-by:
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- Jan 18, 2013
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Matthew Vick authored
Rather than use an extra #define for something that already exists, use the kernel #define for the PTP port. Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
Matthew Vick <matthew.vick@intel.com> Acked-by:
Jacob Keller <Jacob.e.keller@intel.com> Tested-by:
Aaron Brown <aaron.f.brown@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Matthew Vick authored
To prevent a race condition where an skb has been saved to return the Tx timestamp later and the driver is removed, add a check to determine if we have an skb stored and, if so, free it. Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Matthew Vick authored
Add a check against possible Rx timestamp freezing in the hardware via watchdog mechanism. This situation can occur when an Rx timestamp has been latched, but the packet has been dropped because the Rx ring is full. Whenever a packet comes in that should be timestamped, the Rx timestamp gets latched into the hardware registers and we will store the jiffy value in the rx_ring. The watchdog will keep track of his own jiffy timer whenever there is no valid timestamp in the registers. If the watchdog detects a valid timestamp in the registers, meaning that no Rx packet has consumed it yet, it will check which time is most recent: the last time in the watchdog or any time in the rx_rings. If the most recent "event" was more than 5 seconds ago, it will flush the Rx timestamp and print a warning message to the syslog. Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
Richard Cochran <richardcochran@gmail.com> Acked-by:
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Matthew Vick authored
When transmitting a packet that must return a Tx timestamp, a work item gets scheduled to poll for the Tx timestamp being completed in hardware. Add a timeout on this work item of 15 seconds from when the driver gets the skb, after which it will stop polling. Report via stats and system log if this occurs. Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Matthew Vick authored
Enable SW timestamping for situations where the user may prefer it over HW timestamping or there may not be HW timestamping. Cc: Richard Cochran <richardcochran@gmail.com> Signed-off-by:
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Carolyn Wyborny authored
Some of our adapters have internal sensors that report thermal data. This patch enables reporting of that data via sysfs. Signed-off-by:
Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by:
Jeff Pieper <jeffrey.e.pieper@intel.com> Signed-off-by:
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Carolyn Wyborny authored
Some of our devices have internal sensors for reporting thermal data. This patch creates the interface to the sensors for exporting via sysfs. Subsequent patch will actually export the data. Signed-off-by:
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Carolyn Wyborny authored
Some of our adapters have sensors on them accessible via i2c and a private interface. This patch implements the kernel interface for i2c to those sensors. Subsequent patches will provide functions to export that data. Signed-off-by:
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Greg Rose authored
Implement callback in the driver for the new PCI bus driver interface that allows the user to enable/disable SR-IOV virtual functions in a device via the sysfs interface. Signed-off-by:
Greg Rose <gregory.v.rose@intel.com> Tested-by:
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Bruce Allan authored
On 82574, 82583, 82579, I217 and I218 add support for hardware time stamping of all or no Rx packets and Tx packets which have the SKBTX_HW_TSTAMP flag set. Update the .get_ts_info ethtool operation to report the supported time stamping modes, and enable and disable hardware time stamping with the SIOCSHWTSTAMP ioctl. Signed-off-by:
Bruce Allan <bruce.w.allan@intel.com> Tested-by:
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Bjorn Helgaas authored
Use the standard #defines for PCIe Capability ASPM fields. Previously we used PCIE_LINK_STATE_L0S and PCIE_LINK_STATE_L1 directly, but these are defined for the Linux ASPM interfaces, e.g., pci_disable_link_state(), and only coincidentally match the actual register bits. PCIE_LINK_STATE_CLKPM, also part of that interface, does not match the register bit. Signed-off-by:
Bjorn Helgaas <bhelgaas@google.com> CC: e1000-devel@lists.sourceforge.net Acked-by:
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Bruce Allan authored
Add the ability to query and set Energy Efficient Ethernet parameters via ethtool for applicable devices. Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
CC: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
If neigh is not found, create new one. Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
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YOSHIFUJI Hideaki / 吉藤英明 authored
For RTF_GATEWAY route, return rt->rt6i_gateway. Otherwise, return 2nd argument (destination address). This will be used by following patches which remove rt->n dependency patches in ip6_dst_lookup_tail() and ip6_finish_output2(). Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
CC: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
This function, which looks up neighbour entry for an IPv6 address without touching refcnt, will be used for patches to remove dependency on rt->n (neighbour entry in rt6_info). Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
Do not depend on rt->n. Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
We can refer to nd_tbl directly. Signed-off-by:
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YOSHIFUJI Hideaki / 吉藤英明 authored
neigh->nud_state and neigh->updated are under protection of neigh->lock. Signed-off-by:
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Yuval Mintz authored
bnx2x does an internal GRO pass but doesn't provide gso_segs, thus breaking qdisc_pkt_len_init() in case ingress qdisc is used. We store gso_segs in NAPI_GRO_CB(skb)->count, where tcp_gro_complete() expects to find the number of aggregated segments. Signed-off-by:
Yuval Mintz <yuvalmin@broadcom.com> Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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Vipul Pandya authored
Signed-off-by:
Jay Hernandez <jay@chelsio.com> Signed-off-by:
Vipul Pandya <vipul@chelsio.com> Signed-off-by:
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Fabio Baltieri authored
Fix the 64bit optimized version of ipv6_prefix_equal to convert the bitmask to network byte order only after the bit-shift. The bug was introduced in: 38675170 ipv6: 64bit version of ipv6_prefix_equal(). Signed-off-by:
Fabio Baltieri <fabio.baltieri@linaro.org> Signed-off-by:
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Jesper Dangaard Brouer authored
Increase the amount of memory usage limits for incomplete IP fragments. Arguing for new thresh high/low values: High threshold = 4 MBytes Low threshold = 3 MBytes The fragmentation memory accounting code, tries to account for the real memory usage, by measuring both the size of frag queue struct (inet_frag_queue (ipv4:ipq/ipv6:frag_queue)) and the SKB's truesize. We want to be able to handle/hold-on-to enough fragments, to ensure good performance, without causing incomplete fragments to hurt scalability, by causing the number of inet_frag_queue to grow too much (resulting longer searches for frag queues). For IPv4, how much memory does the largest frag consume. Maximum size fragment is 64K, which is approx 44 fragments with MTU(1500) sized packets. Sizeof(struct ipq) is 200. A 1500 byte packet results in a truesize of 2944 (not 2048 as I first assumed) (44*2944)+200 = 129736 bytes The current default high thresh of 262144 bytes, is obviously problematic, as only two 64K fragments can fit in the queue at the same time. How many 64K fragment can we fit into 4 MBytes: 4*2^20/((44*2944)+200) = 32.34 fragment in queues An attacker could send a separate/distinct fake fragment packets per queue, causing us to allocate one inet_frag_queue per packet, and thus attacking the hash table and its lists. How many frag queue do we need to store, and given a current hash size of 64, what is the average list length. Using one MTU sized fragment per inet_frag_queue, each consuming (2944+200) 3144 bytes. 4*2^20/(2944+200) = 1334 frag queues -> 21 avg list length An attack could send small fragments, the smallest packet I could send resulted in a truesize of 896 bytes (I'm a little surprised by this). 4*2^20/(896+200) = 3827 frag queues -> 59 avg list length When increasing these number, we also need to followup with improvements, that is going to help scalability. Simply increasing the hash size, is not enough as the current implementation does not have a per hash bucket locking. Signed-off-by:
Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by:
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- Jan 17, 2013
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Vincent Bernat authored
While a privileged program can open a raw socket, attach some restrictive filter and drop its privileges (or send the socket to an unprivileged program through some Unix socket), the filter can still be removed or modified by the unprivileged program. This commit adds a socket option to lock the filter (SO_LOCK_FILTER) preventing any modification of a socket filter program. This is similar to OpenBSD BIOCLOCK ioctl on bpf sockets, except even root is not allowed change/drop the filter. The state of the lock can be read with getsockopt(). No error is triggered if the state is not changed. -EPERM is returned when a user tries to remove the lock or to change/remove the filter while the lock is active. The check is done directly in sk_attach_filter() and sk_detach_filter() and does not affect only setsockopt() syscall. Signed-off-by:
Vincent Bernat <bernat@luffy.cx> Signed-off-by:
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Cong Wang authored
__dev_get_by_name() doesn't refcount the network device, so we have to do this by ourselves. Noticed by Eric. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jiri Pirko <jiri@resnulli.us> Cc: David S. Miller <davem@davemloft.net> Signed-off-by:
Cong Wang <amwang@redhat.com> Signed-off-by:
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YOSHIFUJI Hideaki authored
Commit 3e4e4c1f ("ipv6: Introduce ip6_flow_hdr() to fill version, tclass and flowlabel.) uses ntohl(), which should be htonl(). Found by Fengguang Wu <fengguang.wu@intel.com>. Signed-off-by:
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Timo Teräs authored
After commit 6f0333b8 ("r8169: use 50% less ram for RX ring") the rx ring buffers are always copied making dirty_rx useless. Signed-off-by:
Timo Teräs <timo.teras@iki.fi> Acked-by:
Francois Romieu <romieu@fr.zoreil.com> Signed-off-by:
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Cong Wang authored
v4: hold rtnl lock for the whole netpoll_setup() v3: remove the comment v2: use RCU read lock This patch fixes the following warning: [ 72.013864] RTNL: assertion failed at net/core/dev.c (4955) [ 72.017758] Pid: 668, comm: netpoll-prep-v6 Not tainted 3.8.0-rc1+ #474 [ 72.019582] Call Trace: [ 72.020295] [<ffffffff8176653d>] netdev_master_upper_dev_get+0x35/0x58 [ 72.022545] [<ffffffff81784edd>] netpoll_setup+0x61/0x340 [ 72.024846] [<ffffffff815d837e>] store_enabled+0x82/0xc3 [ 72.027466] [<ffffffff815d7e51>] netconsole_target_attr_store+0x35/0x37 [ 72.029348] [<ffffffff811c3479>] configfs_write_file+0xe2/0x10c [ 72.030959] [<ffffffff8115d239>] vfs_write+0xaf/0xf6 [ 72.032359] [<ffffffff81978a05>] ? sysret_check+0x22/0x5d [ 72.033824] [<ffffffff8115d453>] sys_write+0x5c/0x84 [ 72.035328] [<ffffffff819789d9>] system_call_fastpath+0x16/0x1b In case of other races, hold rtnl lock for the entire netpoll_setup() function. Cc: Eric Dumazet <eric.dumazet@gmail.com> Cc: Jiri Pirko <jiri@resnulli.us> Cc: David S. Miller <davem@davemloft.net> Signed-off-by:
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Stephen Hemminger authored
The VMXNET3 device provides RSS hash value for received packets, but it is not being used. Signed-off-by:
Stephen Hemminger <stephen@networkplumber.org> Signed-off-by:
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