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* tun: report orphan frags errors to zero copy callbackMichael S. Tsirkin2012-11-02
| | | | | | | | | | When tun transmits a zero copy skb, it orphans the frags which might need to allocate extra memory, in atomic context. If that fails, notify ubufs callback before freeing the skb as a hint that device should disable zerocopy mode. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* skb: api to report errors for zero copy skbsMichael S. Tsirkin2012-11-02
| | | | | | | | | | | | | Orphaning frags for zero copy skbs needs to allocate data in atomic context so is has a chance to fail. If it does we currently discard the skb which is safe, but we don't report anything to the caller, so it can not recover by e.g. disabling zero copy. Add an API to free skb reporting such errors: this is used by tun in case orphaning frags fails. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* skb: report completion status for zero copy skbsMichael S. Tsirkin2012-11-02
| | | | | | | | | | | | | | | | Even if skb is marked for zero copy, net core might still decide to copy it later which is somewhat slower than a copy in user context: besides copying the data we need to pin/unpin the pages. Add a parameter reporting such cases through zero copy callback: if this happens a lot, device can take this into account and switch to copying in user context. This patch updates all users but ignores the passed value for now: it will be used by follow-up patches. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'master' of ↵David S. Miller2012-11-02
|\ | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-next Jeff Kirsher says: ==================== This series contains updates to igb, ixgbe and e1000. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
| * e1000: fix concurrent accesses to PHY from watchdog and ethtoolMaxime Bizon2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | The e1000 driver currently does not protect concurrent accesses to the PHY from both the ethtool callbacks, and from the e1000_watchdog function. This patchs adds a new spinlock which is used by e1000_{read,write}_phy_reg in order to serialize concurrent accesses to the PHY. Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Signed-off-by: Florian Fainelli <ffainelli@freebox.fr> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * igb: Fix EEPROM writes via ethtool on i210Carolyn Wyborny2012-11-01
| | | | | | | | | | | | | | | | | | | | This patch fixes a problem where the driver would crash when trying to write a word to the EEPROM on i210 devices. Reported-by: Ekman Tsang <Ekman.Tsang@riverbed.com> Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * igb: Add function to read i211's invm versionCarolyn Wyborny2012-11-01
| | | | | | | | | | | | | | | | | | | | The i211's one-time programmable (invm) version field is different than the other fields contained in it. This patch adds a function to get the invm version of it and store it for output from ethtool. Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * igb: Remove workaround for EEE configuration on i210/I211Carolyn Wyborny2012-11-01
| | | | | | | | | | | | | | | | | | | | This patch removes a workaround that was needed on pre-release hardware. Released hardware should not have this setting, but any devices that do will get a warning message instead. Signed-off-by: Carolyn Wyborny <carolyn.wyborny@intel.com> Tested-by: Aaron Brown <aaron.f.brown@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * ixgbe: fix default setting of TXDCTL.WTHRESHEmil Tantilov2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | The q_vector->itr check in ixgbe_configure_tx_ring() was done prior to it being set, which resulted in TXDCTL.WTHRESH always being set to 1 on driver load, while consequent resets would set it to 8. This patch moves the setting of q_vector->itr in ixgbe_alloc_q_vector() to make sure that TXDCTL.WTHRESH is set to 8 by default. Signed-off-by: Emil Tantilov <emil.s.tantilov@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
| * ixgbe: fix uninitialized event.type in ixgbe_ptp_check_pps_eventJacob Keller2012-11-01
| | | | | | | | | | | | | | | | | | This patch fixes a bug in ixgbe_ptp_check_pps_event where the type was uninitialized and could cause unknown event outcomes. Signed-off-by: Jacob Keller <jacob.e.keller@intel.com> Tested-by: Phil Schmitt <phillip.j.schmitt@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
* | vlan: use IS_ENABLED()Amerigo Wang2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | #if defined(CONFIG_FOO) || defined(CONFIG_FOO_MODULE) can be replaced by #if IS_ENABLED(CONFIG_FOO) Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ipv6: use IS_ENABLED()Amerigo Wang2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | #if defined(CONFIG_FOO) || defined(CONFIG_FOO_MODULE) can be replaced by #if IS_ENABLED(CONFIG_FOO) Cc: David S. Miller <davem@davemloft.net> Signed-off-by: Cong Wang <amwang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | rtnl/ipv4: use netconf msg to advertise rp_filter statusNicolas Dichtel2012-11-01
| | | | | | | | | | Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ppp: make ppp_get_stats64 staticstephen hemminger2012-11-01
| | | | | | | | | | | | | | This was picked up by sparse. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | FEC: Add time stamping code and a PTP hardware clockFrank Li2012-11-01
| | | | | | | | | | | | | | | | | | | | | | This patch adds a driver for the FEC(MX6) that offers time stamping and a PTP haderware clock. Because FEC\ENET(MX6) hardware frequency adjustment is complex, we have implemented this in software by changing the multiplication factor of the timecounter. Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ARM: imx6q: Set enet tx reference clk from anatop to support 1588Frank Li2012-11-01
| | | | | | | | | | | | | | | | | | Set GRP1 BIT21 ENET_CLK_SEL: Enet tx reference clk from internal clock from anatop (loopback through pad), this clock also sent out to external PHY Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ARM: dts: imx6q: Add ENET PTP clock pin and clock sourceFrank Li2012-11-01
| | | | | | | | | | | | | | | | | | Add ENET 1588 clock input pin MX6Q_PAD_GPIO_16__ENET_ANATOP_ETHERNET_REF_OUT and anatop PLL8 clock source for ENET Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net: fec: move fec_enet_private to header fileFrank Li2012-11-01
| | | | | | | | | | | | | | | | A new file fec_ptp.c will use fec_enet_private to support 1588 PTP move such structure to common header file fec.h Signed-off-by: Frank Li <Frank.Li@freescale.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | veth: allow changing the mac address while interface is upHannes Frederic Sowa2012-11-01
| | | | | | | | | | Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: support the HWTSTAMP ioctl and the CPTSRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | This patch hooks into the CPTS code and adds support for the HWTSTAMP ioctl. The patch includes code for the CPSW version found in the dm814x even though the background device tree support for this board is still missing. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpts: specify the input clock frequency via DTRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | This patch adds a way to configure the CPTS input clock scaling factors via the device tree. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: add a DT field for the active time stamping portRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | Because time stamping on both external ports of the switch simultaneously is positively useless from the application's point of view, this patch provides a DT configuration method to choose the active port. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: add a DT field for the cpts offsetRichard Cochran2012-11-01
| | | | | | | | | | Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpts: introduce time stamping code and a PTP hardware clock.Richard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | This patch adds a driver for the CPTS that offers time stamping and a PTP hardware clock. Because some of the CPTS hardware variants (like the am335x) do not support frequency adjustment, we have implemented this in software by changing the multiplication factor of the timecounter. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: support both silicon versionsRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | This patch fixes the cpsw driver to operate correctly with both the dm814x and the am335x versions of the switch hardware. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: remember the silicon versionRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | This patch lets the CPSW driver remember the version number in order to support the two different variants already in the wild. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: add missing fields to the CPSW_SS register bank.Richard Cochran2012-11-01
| | | | | | | | | | Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | cpsw: rename register banks to match the reference manualRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | The code mixes up the CPSW_SS and the CPSW_WR register naming. This patch changes the names to conform to the published Technical Reference Manual from TI, in order to make working on the code less confusing. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | drivers: net: ethernet: cpsw: add multicast address to ALE tableMugunthan V N2012-11-01
| | | | | | | | | | | | | | | | | | Adding multicast address to ALE table via netdev ops to subscribe, transmit or receive multicast frames to and from the network Signed-off-by: Mugunthan V N <mugunthanvnm@ti.com> Acked-by: Richard Cochran <richardcochran@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: add pinctrl consumer supportJean-Christophe PLAGNIOL-VILLARD2012-11-01
| | | | | | | | | | | | | | | | | | | | | | If no pinctrl available just report a warning as some architecture may not need to do anything. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> [nicolas.ferre@atmel.com: adapt the error path, remove unneeded headers] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: Offset first RX buffer by two bytesHavard Skinnemoen2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the ethernet frame payload word-aligned, possibly making the memcpy into the skb a bit faster. This will be even more important after we eliminate the copy altogether. Also eliminate the redundant RX_OFFSET constant -- it has the same definition and purpose as NET_IP_ALIGN. Signed-off-by: Havard Skinnemoen <havard@skinnemoen.net> [nicolas.ferre@atmel.com: adapt to newer kernel] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: better manage tx errorsNicolas Ferre2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Handle all TX errors, not only underruns. TX error management is deferred to a dedicated workqueue. Reinitialize the TX ring after treating all remaining frames, and restart the controller when everything has been cleaned up properly. Napi is not stopped during this task as the driver only handles napi for RX for now. With this sequence, we do not need a special check during the xmit method as the packets will be caught by TX disable during workqueue execution. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: ethtool interface: add register dump featureNicolas Ferre2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | Add macb_get_regs() ethtool function and its helper function: macb_get_regs_len(). The version field is deduced from the IP revision which gives the "MACB or GEM" information. An additional version field is reserved. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Ben Hutchings <bhutchings@solarflare.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: clean up ring buffer logicHavard Skinnemoen2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of masking head and tail every time we increment them, just let them wrap through UINT_MAX and mask them when subscripting. Add simple accessor functions to do the subscripting properly to minimize the chances of messing this up. This makes the code slightly smaller, and hopefully faster as well. Also, doing the ring buffer management this way will simplify things a lot when making the ring sizes configurable in the future. Available number of descriptors in ring buffer function by David Laight. Signed-off-by: Havard Skinnemoen <havard@skinnemoen.net> [nicolas.ferre@atmel.com: split patch in topics, adapt to newer kernel] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: tx status is more than 8 bits nowNicolas Ferre2012-11-01
| | | | | | | | | | | | | | | | On some revision of GEM, TSR status register has more information. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: remove macb_get_drvinfo()Nicolas Ferre2012-11-01
| | | | | | | | | | | | | | | | | | | | This function has little meaning so remove it altogether and let ethtool core fill in the fields automatically. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Reviewed-by: Ben Hutchings <bhutchings@solarflare.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: change debugging messagesHavard Skinnemoen2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | Convert some noisy netdev_dbg() statements to netdev_vdbg(). Defining DEBUG will no longer fill up the logs; VERBOSE_DEBUG still does. Add one more verbose debug for ISR status. Signed-off-by: Havard Skinnemoen <havard@skinnemoen.net> [nicolas.ferre@atmel.com: split patch in topics, add ISR status] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: memory barriers cleanupHavard Skinnemoen2012-11-01
| | | | | | | | | | | | | | | | | | | | Remove a couple of unneeded barriers and document the remaining ones. Signed-off-by: Havard Skinnemoen <havard@skinnemoen.net> [nicolas.ferre@atmel.com: split patch in topics] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | net/macb: Add support for Gigabit Ethernet modePatrice Vilchez2012-11-01
| | | | | | | | | | | | | | | | | | Add Gigabit Ethernet mode to GEM cadence IP and enable RGMII connection. Signed-off-by: Patrice Vilchez <patrice.vilchez@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Tested-by: Joachim Eastwood <manabian@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | time: remove the timecompare code.Richard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch removes the timecompare code from the kernel. The top five reasons to do this are: 1. There are no more users of this code. 2. The original idea was a bit weak. 3. The original author has disappeared. 4. The code was not general purpose but tuned to a particular hardware, 5. There are better ways to accomplish clock synchronization. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Acked-by: John Stultz <john.stultz@linaro.org> Tested-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bfin_mac: offer a PTP Hardware Clock.Richard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | The BF518 has a PTP time unit that works in a similar way to other MAC based clocks, like gianfar, ixp46x, and igb. This patch adds support for using the blackfin as a PHC. Although the blackfin hardware does offer a few ancillary features, this patch implements only the basic operations. Compile tested only. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Tested-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bfin_mac: replace sys time stamps with raw ones instead.Richard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch replaces the sys time stamps and timecompare code with simple raw hardware time stamps in nanosecond resolution. The only tricky bit is to find a PTP Hardware Clock period slower than the input clock period and a power of two. Compile tested only. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Tested-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | bfin_mac: only advertise hardware time stamped when enabled.Richard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | The hardware time stamping code is a compile time option for the blackfin. When it is not enabled, the driver should fall back to the standard ethtool reply to the get_ts_info query. Compile tested only. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Tested-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ptp: add an ioctl to compare PHC time with system timeRichard Cochran2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an ioctl for PTP Hardware Clock (PHC) devices that allows user space to measure the time offset between the PHC and the system clock. Rather than hard coding any kind of estimation algorithm into the kernel, this patch takes the more flexible approach of just delivering an array of raw clock readings. In that way, the user space clock servo may be adapted to new and different hardware clocks. Signed-off-by: Richard Cochran <richardcochran@gmail.com> Acked-by: Jacob Keller <jacob.e.keller@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ptp: Enable clock drivers along with associated net/PHY driversBen Hutchings2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Where a PTP clock driver is associated with a net or PHY driver, it should be enabled automatically whenever that driver is enabled. Therefore: - Make PTP clock drivers select rather than depending on PTP_1588_CLOCK - Remove separate boolean options for PTP clock drivers that are built as part of net driver modules. (This also fixes cases where the PTP subsystem is wrongly forced to be built-in.) - Set 'default y' for PTP clock drivers that depend on specific net drivers but are built separately Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | ptp: Make PTP_1588_CLOCK select rather than depend on PPSBen Hutchings2012-11-01
| | | | | | | | | | | | | | | | | | | | PTP hardware clock drivers that select PTP_1588_CLOCK must currently also select PPS. For those drivers that don't, the user must enable PPS, then enable PTP_1588_CLOCK, then the driver. Simplify things for developers and users by putting this selection in one place. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | pps, ptp: Remove dependencies on EXPERIMENTALBen Hutchings2012-11-01
| | | | | | | | | | | | | | | | | | These are now established subsystems, and we want drivers to be able to select PPS and PTP_1588_CLOCK without depending on EXPERIMENTAL. Further, the use of EXPERIMENTAL is now deprecated in general. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | sk-filter: Add ability to get socket filter program (v2)Pavel Emelyanov2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SO_ATTACH_FILTER option is set only. I propose to add the get ability by using SO_ATTACH_FILTER in getsockopt. To be less irritating to eyes the SO_GET_FILTER alias to it is declared. This ability is required by checkpoint-restore project to be able to save full state of a socket. There are two issues with getting filter back. First, kernel modifies the sock_filter->code on filter load, thus in order to return the filter element back to user we have to decode it into user-visible constants. Fortunately the modification in question is interconvertible. Second, the BPF_S_ALU_DIV_K code modifies the command argument k to speed up the run-time division by doing kernel_k = reciprocal(user_k). Bad news is that different user_k may result in same kernel_k, so we can't get the original user_k back. Good news is that we don't have to do it. What we need to is calculate a user2_k so, that reciprocal(user2_k) == reciprocal(user_k) == kernel_k i.e. if it's re-loaded back the compiled again value will be exactly the same as it was. That said, the user2_k can be calculated like this user2_k = reciprocal(kernel_k) with an exception, that if kernel_k == 0, then user2_k == 1. The optlen argument is treated like this -- when zero, kernel returns the amount of sock_fprog elements in filter, otherwise it should be large enough for the sock_fprog array. changes since v1: * Declared SO_GET_FILTER in all arch headers * Added decode of vlan-tag codes Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tuntap: choose the txq based on rxqJason Wang2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements a simple multiqueue flow steering policy - tx follows rx for tun/tap. The idea is simple, it just choose the txq based on which rxq it comes. The flow were identified through the rxhash of a skb, and the hash to queue mapping were recorded in a hlist with an ageing timer to retire the mapping. The mapping were created when tun receives packet from userspace, and was quired in .ndo_select_queue(). I run co-current TCP_CRR test and didn't see any mapping manipulation helpers in perf top, so the overhead could be negelected. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | tuntap: add ioctl to attach or detach a file form tuntap deviceJason Wang2012-11-01
| | | | | | | | | | | | | | | | | | | | | | | | Sometimes usespace may need to active/deactive a queue, this could be done by detaching and attaching a file from tuntap device. This patch introduces a new ioctls - TUNSETQUEUE which could be used to do this. Flag IFF_ATTACH_QUEUE were introduced to do attaching while IFF_DETACH_QUEUE were introduced to do the detaching. Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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