- 13 May, 2015 1 commit
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Justin Cormack authored
The macvtap driver tries to emulate all the ioctls supported by a normal tun/tap driver, however it was missing the generic SIOCGIFHWADDR and SIOCSIFHWADDR ioctls to get and set the mac address that are supported by tun/tap. This patch adds these. Signed-off-by:
Justin Cormack <justin@netbsd.org> Signed-off-by:
David S. Miller <davem@davemloft.net>
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- 12 May, 2015 38 commits
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David S. Miller authored
Scott Feldman says: ==================== switchdev: spring cleanup v7: Address review comments: - [Jiri] split the br_setlink and br_dellink reverts into their own patches - [Jiri] some parameter cleanup of rocker's memory allocators - [Jiri] pass trans mode as formal parameter rather than hanging off of rocker_port. v6: Address review comments: - [Jiri] split a couple of patches into one-logical-change per patch - [Joe Perches] revert checkpatch -f changes for wrapped lines with long symbols. v5: Address review comments: - [Jiri] include Jiri's s/swdev/switchdev rename patches up front. - [Jiri] squash some patches. Now setlink/dellink/getlink patches are in three parts: new implementation, convert drivers to new, delete old impl. - [Jiri] some minor variable renames - [Jiri] use BUG_ON rather than WARN when COMMIT phase fails when PREPARE phase said it was safe to come into the water. - [Simon] rocker: fix a few transaction prepare-commit cases that were wrong. This was the bulk of the changes in v5. v4: Well, it was a lot of work, but now prepare-commit transaction model is how davem advises: if prepare fails, abort the transaction. The driver must do resource reservations up front in prepare phase and return those resources if aborting. Commit phase would use reserved resources. The good news is the driver code (for rocker) now handles resource allocation failures better by not leaving partially device or driver states. This is a side-effect of the prepare phase where state isn't modified; only validation of inputs and resource reservations happen in the prepare phase. Since we're supporting setting attrs and add objs across lower devs in the stacked case, we need to hold rtnl_lock (or ensure rtnl_lock is held) so lower devs don't move on us during the prepare-commit transaction. DSA driver code skips the prepare phase and goes straight for the commit phase since no up-front allocations are done and no device failures (that could be detected in the prepare phase) can happen. Remove NETIF_F_HW_SWITCH_OFFLOAD from rocker and the swdev_attr_set/get wrappers. DSA doesn't set NETIF_F_HW_SWITCH_OFFLOAD, so it can't be in swdev_attr_set/get. rocker doesn't need it; or rather can't support NETIF_F_HW_SWITCH_OFFLOAD being set/cleared at run-time after the device port is already up and offloading L2/L3. NETIF_F_HW_SWITCH_OFFLOAD is still left as a feature flag for drivers that can use it. Drop the renaming patch for netdev_switch_notifier. Other renames are a result of moving to the attr get/set or obj add/del model. Everything but the netdev_switch_notifier is still prefixed with "swdev_". v3: Move to two-phase prepare-commit transaction model for attr set and obj add. Driver gets a change in prepare phase to NACK transaction if lack of resources or support in device. v2: Address review comments: - [Jiri] squash a few related patches - [Roopa] don't remove NETIF_F_HW_SWITCH_OFFLOAD - [Roopa] address VLAN setlink/dellink - [Ronen] print warning is attr set revert fails Not address: - Using something other than "swdev_" prefix - Vendor extentions The patch set grew a bit to not only support port attr get/set but also add support for port obj add/del. Example of port objs are VLAN, FDB entries, and FIB entries. The VLAN support now allows the swdev driver to get VLAN ranges and flags like PVID and "untagged". Sridhar will be adding FDB obj support in follow-on patch. v1: The main theme of this patch set is to cleanup swdev in preparation for new features or fixes to be added soon. We have a pretty good idea now how to handle stacked drivers in swdev, but there where some loose ends. For example, if a set failed in the middle of walking the lower devs, we would leave the system in an undefined state...there was no way to recover back to the previous state. Speaking of sets, also recognize a pattern that most swdev API accesses are gets or sets of port attributes, so go ahead and make port attr get/set the central swdev API, and convert everything that is set-ish/get-ish to this new API. Features/fixes that should follow from this cleanup: - solve the duplicate pkt forwarding issue - get/set bridge attrs, like ageing_time, from/to device - get/set more bridge port attrs from/to device There are some rename cleanups tagging along at the end, to give swdev consistent naming. And finally, some much needed updates to the switchdev.txt documentation to hopefully capture the state-of-the-art of swdev. Hopefully, we can do a better job keeping this document up-to-date. Tested with rocker, of course, to make sure nothing functional broke. There are a couple minor tweaks to DSA code for getting switch ID and setting STP updates to use new API, but not expecting amy breakage there. ==================== Signed-off-by: -
Scott Feldman authored
Much need updated of switchdev documentation to cover what's been implmented to-date. There are some XXX comments in the text for unimplemented or broken items. I'd like to keep these in there (poor-man's TODO list) and update the document once each issue is resolved. Signed-off-by:
Scott Feldman <sfeldma@gmail.com> Acked-by:
Jiri Pirko <jiri@resnulli.us> Signed-off-by:
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Scott Feldman authored
Well almost clean: ignore the CHECKs for space after cast operator and some longer-than-80 char cases where for readability it's better to keep as-is. Signed-off-by:
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Scott Feldman authored
Roopa said remove the feature flag for this series and she'll work on bringing it back if needed at a later date. Signed-off-by:
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Scott Feldman authored
The IPv4 FIB ops convert nicely to the switchdev objs and we're left with only four switchdev ops: port get/set and port add/del. Other objs will follow, such as FDB. So go ahead and convert IPv4 FIB over to switchdev obj for consistency, anticipating more objs to come. Signed-off-by:
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Scott Feldman authored
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Scott Feldman authored
Like bridge_setlink, add switchdev wrapper to handle bridge_getlink and call into port driver to get port attrs. For now, only BR_LEARNING and BR_LEARNING_SYNC are returned. To add more, we'll probably want to break away from ndo_dflt_bridge_getlink() and build the netlink skb directly in the switchdev code. Signed-off-by:
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Scott Feldman authored
This is revert of: commit 68e331c7 ("bridge: offload bridge port attributes to switch asic if feature flag set") Restore br_dellink back to original and don't call into SELF port driver. rtnetlink.c:bridge_dellink() already does a call into port driver for SELF. bridge vlan add/del cmd defaults to MASTER. From man page for bridge vlan add/del cmd: self the vlan is configured on the specified physical device. Required if the device is the bridge device. master the vlan is configured on the software bridge (default). Signed-off-by:
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Scott Feldman authored
Now we can remove old wrappers for dellink. Signed-off-by:
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Scott Feldman authored
Rocker, bonding and team and switch over to the new switchdev_port_bridge_dellink to avoid duplicating code in each driver. Signed-off-by:
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Scott Feldman authored
Same change as setlink. Provide the wrapper op for SELF ndo_bridge_dellink and call into the switchdev driver to delete afspec VLANs. Signed-off-by:
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Scott Feldman authored
This is revert of: commit 68e331c7 ("bridge: offload bridge port attributes to switch asic if feature flag set") Restore br_setlink back to original and don't call into SELF port driver. rtnetlink.c:bridge_setlink() already does a call into port driver for SELF. bridge set link cmd defaults to MASTER. From man page for bridge link set cmd: self link setting is configured on specified physical device master link setting is configured on the software bridge (default) The link setting has two values: the device-side value and the software bridge-side value. These are independent and settable using the bridge link set cmd by specifying some combination of [master] | [self]. Furthermore, the device-side and bridge-side settings have their own initial value, viewable from bridge -d link show cmd. Restoring br_setlink back to original makes rocker (the only in-kernel user of SELF link settings) work as first implement: two-sided values. It's true that when both MASTER and SELF are specified from the command, two netlink notifications are generated, one for each side of the settings. The user-space app can distiquish between the two notifications by observing the MASTER or SELF flag. Signed-off-by:
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Scott Feldman authored
New attr-based bridge_setlink can recurse lower devs and recover on err, so remove old wrapper (including ndo_dflt_switchdev_port_bridge_setlink). Signed-off-by:
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Scott Feldman authored
Rocker, bonding, and team can now use the switchdev bridge setlink to parse raw netlink; no need to duplicate this code in each driver. Signed-off-by:
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Scott Feldman authored
Add new switchdev_port_bridge_setlink that can be used by drivers implementing .ndo_bridge_setlink to set switchdev bridge attributes. Basically turn the raw rtnl_bridge_setlink netlink into switchdev attr sets. Proper netlink attr policy checking is done on the protinfo part of the netlink msg. Currently, for protinfo, only bridge port attrs BR_LEARNING and BR_LEARNING_SYNC are parsed and passed to port driver. For afspec, VLAN objs are passed so switchdev driver can set VLANs assigned to SELF. To illustrate with iproute2 cmd, we have: bridge vlan add vid 10 dev sw1p1 self master To add VLAN 10 to port sw1p1 for both the bridge (master) and the device (self). Signed-off-by:
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Scott Feldman authored
rocker: use switchdev get/set attr for bridge port flags Signed-off-by:
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Scott Feldman authored
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Scott Feldman authored
VLAN obj has flags (PVID and untagged) as well as start and end vid ranges. The switchdev driver can optimize programing the device using the ranges. Signed-off-by:
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Scott Feldman authored
Like switchdev attr get/set, add new switchdev obj add/del. switchdev objs will be things like VLANs or FIB entries, so add/del fits better for objects than get/set used for attributes. Use same two-phase prepare-commit transaction model as in attr set. Signed-off-by:
Sridhar Samudrala <sridhar.samudrala@intel.com> Acked-by:
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Scott Feldman authored
STP update is just a settable port attribute, so convert switchdev_port_stp_update to an attr set. For DSA, the prepare phase is skipped and STP updates are only done in the commit phase. This is because currently the DSA drivers don't need to allocate any memory for STP updates and the STP update will not fail to HW (unless something horrible goes wrong on the MDIO bus, in which case the prepare phase wouldn't have been able to predict anyway). Signed-off-by:
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Scott Feldman authored
For rocker, support prepare-commit transaction model for setting attributes (and for adding objects). This requires rocker to preallocate memory needed for the commit up front in the prepare phase. Since rtnl_lock is held between prepare-commit, store the allocated memory on a queue hanging off of the rocker_port. Also, in prepare phase, do everything right up to calling into HW. The same code paths are tranversed in the driver for both prepare and commit phases. In some cases, any state modified in the prepare phase must be reverted before returning so the commit phase makes the same decisions. As a consequence of holding rtnl_lock in process context for all attr sets (and obj adds), all memory is GFP_KERNEL allocated and we don't need to busy spin waiting for the device to complete the command. So the bulk of this patch is simplifying the memory allocations to only use GFP_KERNEL and to remove the nowait flag and busy spin loop. Signed-off-by:
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Scott Feldman authored
Switch ID is just a gettable port attribute. Convert switchdev op switchdev_parent_id_get to a switchdev attr. Note: for sysfs and netlink interfaces, SWITCHDEV_ATTR_PORT_PARENT_ID is called with SWITCHDEV_F_NO_RECUSE to limit switch ID user-visiblity to only port netdevs. So when a port is stacked under bond/bridge, the user can only query switch id via the switch ports, but not via the upper devices Signed-off-by:
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Scott Feldman authored
Add two new swdev ops for get/set switch port attributes. Most swdev interactions on a port are gets or sets on port attributes, so rather than adding ops for each attribute, let's define clean get/set ops for all attributes, and then we can have clear, consistent rules on how attributes propagate on stacked devs. Add the basic algorithms for get/set attr ops. Use the same recusive algo to walk lower devs we've used for STP updates, for example. For get, compare attr value for each lower dev and only return success if attr values match across all lower devs. For sets, set the same attr value for all lower devs. We'll use a two-phase prepare-commit transaction model for sets. In the first phase, the driver(s) are asked if attr set is OK. If all OK, the commit attr set in second phase. A driver would NACK the prepare phase if it can't set the attr due to lack of resources or support, within it's control. RTNL lock must be held across both phases because we'll recurse all lower devs first in prepare phase, and then recurse all lower devs again in commit phase. If any lower dev fails the prepare phase, we need to abort the transaction for all lower devs. If lower dev recusion isn't desired, allow a flag SWITCHDEV_F_NO_RECURSE to indicate get/set only work on port (lowest) device. Signed-off-by:
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Jiri Pirko authored
Turned out that "switchdev" sticks. So just unify all related terms to use this prefix. Signed-off-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Acked-by:
Andy Gospodarek <gospo@cumulusnetworks.com> Signed-off-by:
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Jiri Pirko authored
Turned out that "switchdev" sticks. So just unify all related terms to use this prefix. Signed-off-by:
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David Ward authored
In a GRED qdisc, if the default "virtual queue" (VQ) does not have drop parameters configured, then packets for the default VQ are not subjected to RED and are only dropped if the queue is larger than the net_device's tx_queue_len. This behavior is useful for WRED mode, since these packets will still influence the calculated average queue length and (therefore) the drop probability for all of the other VQs. However, for some drivers tx_queue_len is zero. In other cases the user may wish to make the limit the same for all VQs (including the default VQ with no drop parameters). This change adds a TCA_GRED_LIMIT attribute to set the GRED queue limit, in bytes, during qdisc setup. (This limit is in bytes to be consistent with the drop parameters.) The default limit is the same as for a bfifo queue (tx_queue_len * psched_mtu). If the drop parameters of any VQ are configured with a smaller limit than the GRED queue limit, that VQ will still observe the smaller limit instead. Signed-off-by:
David Ward <david.ward@ll.mit.edu> Signed-off-by:
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Nicolas Schichan authored
Signed-off-by:
Nicolas Schichan <nschichan@freebox.fr> Signed-off-by:
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David S. Miller authored
Alexander Duyck says: ==================== Refactor netdev page frags and move them into mm/ This patch series addresses several things. First I found an issue in the performance of the pfmemalloc check from build_skb. To work around it I have provided a cached copy of pfmemalloc to be used in __netdev_alloc_skb and __napi_alloc_skb. Second I moved the page fragment allocation logic into the mm tree and added functionality for freeing page fragments. I had to fix igb before I could do this as it was using a reference to NETDEV_FRAG_PAGE_MAX_SIZE incorrectly. Finally I went through and replaced all of the duplicate code that was calling put_page and replaced it with calls to skb_free_frag. With these changes in place a simple receive and drop test increased from a packet rate of 8.9Mpps to 9.8Mpps. The gains breakdown as follows: 8.9Mpps Before 9.8Mpps After ------------------------ ------------------------ 7.8% put_compound_page 9.1% __free_page_frag 3.9% skb_free_head 1.1% put_page 4.9% build_skb 3.8% __napi_alloc_skb 2.5% __alloc_rx_skb 1.9% __napi_alloc_skb ==================== Signed-off-by: -
Alexander Duyck authored
Signed-off-by:
Alexander Duyck <alexander.h.duyck@redhat.com> Signed-off-by:
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Alexander Duyck authored
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Alexander Duyck authored
Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by:
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Alexander Duyck authored
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Alexander Duyck authored
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Alexander Duyck authored
This change adds a function called skb_free_frag which is meant to compliment the function netdev_alloc_frag. The general idea is to enable a more lightweight version of page freeing since we don't actually need all the overhead of a put_page, and we don't quite fit the model of __free_pages. Signed-off-by:
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Alexander Duyck authored
This change moves the __alloc_page_frag functionality out of the networking stack and into the page allocation portion of mm. The idea it so help make this maintainable by placing it with other page allocation functions. Since we are moving it from skbuff.c to page_alloc.c I have also renamed the basic defines and structure from netdev_alloc_cache to page_frag_cache to reflect that this is now part of a different kernel subsystem. I have also added a simple __free_page_frag function which can handle freeing the frags based on the skb->head pointer. The model for this is based off of __free_pages since we don't actually need to deal with all of the cases that put_page handles. I incorporated the virt_to_head_page call and compound_order into the function as it actually allows for a signficant size reduction by reducing code duplication. Signed-off-by:
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Alexander Duyck authored
This change makes it so that we store the virtual address of the page in the netdev_alloc_cache instead of the page pointer. The idea behind this is to avoid multiple calls to page_address since the virtual address is required for every access, but the page pointer is only needed at allocation or reset of the page. While I was at it I also reordered the netdev_alloc_cache structure a bit so that the size is always 16 bytes by dropping size in the case where PAGE_SIZE is greater than or equal to 32KB. Signed-off-by:
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Alexander Duyck authored
This change updates igb so that it will correctly perform the descriptor count calculation. Previously it was taking NETDEV_FRAG_PAGE_MAX_SIZE into account with isn't really correct since a different value is used to determine the size of the pages used for TCP. That is actually determined by SKB_FRAG_PAGE_ORDER. Signed-off-by:
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Alexander Duyck authored
While testing I found that the testing for pfmemalloc in build_skb was rather expensive. I found the issue to be two-fold. First we have to get from the virtual address to the head page and that comes at the cost of something like 11 cycles. Then there is the cost for reading pfmemalloc out of the head page which can be cache cold due to the fact that put_page_testzero is likely invalidating the cache-line on one or more CPUs as the fragments can be shared. To avoid this extra expense I have added a pfmemalloc member to the netdev_alloc_cache. I then pushed pieces of __alloc_rx_skb into __napi_alloc_skb and __netdev_alloc_skb so that I could rewrite them to make use of the cached pfmemalloc value. The result is that my perf traces show a reduction from 9.28% overhead to 3.7% for the code covered by build_skb, __alloc_rx_skb, and __napi_alloc_skb when performing a test with the packet being dropped instead of being handed to napi_gro_receive. Signed-off-by:
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- 11 May, 2015 1 commit
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Eric Dumazet authored
Only left enqueue_root() user is netem, and it looks not necessary : qdisc_skb_cb(skb)->pkt_len is preserved after one skb_clone() Signed-off-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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