- 27 Jul, 2018 30 commits
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David S. Miller authored
Guillaume Nault says: ==================== l2tp: remove unused session fields Several fields of the session structures can be set, but remain unused otherwise. This series removes these fields and explicitely ignores the associated ioctls and netlink attributes. ==================== Signed-off-by:David S. Miller <davem@davemloft.net>
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Guillaume Nault authored
This field is not used. Treat PPPIOC*MRU the same way as PPPIOC*FLAGS: "get" requests return 0, while "set" requests vadidate the user supplied pointer but discard its value. Signed-off-by:
Guillaume Nault <g.nault@alphalink.fr> Signed-off-by:
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Guillaume Nault authored
This field is not used. Keep validating user input in PPPIOCSFLAGS. Even though we discard the value, it would look wrong to succeed if an invalid address was passed from userspace. Signed-off-by:
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Guillaume Nault authored
The value of this attribute is never used. Signed-off-by:
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Guillaume Nault authored
The value of this attribute is never used. Signed-off-by:
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Anders Roxell authored
Remove prefix 'CONFIG_' from CONFIG_IPV6 Fixes: ba7d7e26 ("net/rds/Kconfig: RDS should depend on IPV6") Reported-by:
Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by:
Anders Roxell <anders.roxell@linaro.org> Reviewed-by:
Eric Dumazet <edumazet@google.com> Signed-off-by:
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David S. Miller authored
Ido Schimmel says: ==================== mlxsw: Support DSCP prioritization and rewrite Petr says: On ingress, a network device such as a switch assigns to packets priority based on various criteria. Common options include interpreting PCP and DSCP fields according to user configuration. When a packet egresses the switch, a reverse process may rewrite PCP and/or DSCP headers according to packet priority. So far, mlxsw has supported prioritization based on PCP (802.1p priority tag). This patch set introduces support for prioritization based on DSCP, and DSCP rewrite. To configure the DSCP-to-priority maps, the user is expected to invoke ieee_setapp and ieee_delapp DCBNL ops, e.g. by using lldptool: To decide whether or not to pay attention to DSCP values, the Spectrum switch recognize a per-port configuration of trust level. Until the first APP rule is added for a given port, this port's trust level stays at PCP, meaning that PCP is used for packet prioritization. With the first DSCP APP rule, the port is configured to trust DSCP instead, and it stays there until all DSCP APP rules are removed again. Besides the DSCP (value 5) selector, another selector that plays into packet prioritization is Ethernet type (value 1) with PID of 0. Such APP entries denote default priority[1]: With this patch set, mlxsw uses these values to configure priority for DSCP values not explicitly specified in DSCP APP map. In the future we expect to also use this to configure default port priority for untagged packets. Access to DSCP-to-priority map, priority-to-DSCP map, and default priority for a port is exposed through three new DCB helpers. Like the already-existing dcb_ieee_getapp_mask() helper, these helpers operate in terms of bitmaps, to support the arbitrary M:N mapping that the APP rules allow. Such interface presents all the relevant information from the APP database without necessitating exposition of iterators, locking or other complex primitives. It is up to the driver to then digest the mapping in a way that the device supports. In this patch set, mlxsw resolves conflicts by favoring higher-numbered DSCP values and priorities. In this patchset: - Patch #1 fixes a bug in DCB APP database management. - Patch #2 adds the getters described above. - Patches #3-#6 add Spectrum configuration registers. - Patch #7 adds the mlxsw logic that configures the device according to APP rules. - Patch #8 adds a self-test. The test is added to the subdirectory drivers/net/mlxsw. Even though it's not particularly specific to mlxsw, it's not suitable for running on soft devices (which don't support the ieee_getapp et.al.), and thus isn't a good fit for the general net/forwarding directory. [1] 802.1Q-2014, Table D-9 ==================== Signed-off-by: -
Petr Machata authored
Add a test that exercises the new code. Send DSCP-tagged packets, and observe how they are prioritized in the switch and the DSCP is updated on egress again. Signed-off-by:
Petr Machata <petrm@mellanox.com> Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
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Petr Machata authored
The APP TLVs are used for communicating priority-to-protocol ID maps for a given netdevice. Support the following APP TLVs: - DSCP (selector 5) to configure priority-to-DSCP code point maps. Use these maps to configure packet priority on ingress, and DSCP code point rewrite on egress. - Default priority (selector 1, PID 0) to configure priority for the DSCP code points that don't have one assigned by the DSCP selector. In future this could also be used for assigning default port priority when a packet arrives without DSCP tagging. Besides setting up the maps themselves, also configure port trust level and rewrite bits. Port trust level determines whether, for a packet arriving through a certain port, the priority should be determined based on PCP or DSCP header fields. So far, mlxsw kept the device default of trust-PCP. Now, as soon as the first DSCP APP TLV is configured, switch to trust-DSCP. Only when all DSCP APP TLVs are removed, switch back to trust-PCP again. Note that the default priority APP TLV doesn't impact the trust level configuration. Rewrite bits determine whether DSCP and PCP fields of egressing packets should be updated according to switch priority. When port trust is switched to DSCP, enable rewrite of DSCP field. Signed-off-by:
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Petr Machata authored
This register controls mapping from Priority to DSCP for purposes of rewrite. Note that rewrite happens as the packet is transmitted provided that the DSCP rewrite bit is enabled for the packet. Signed-off-by:
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Petr Machata authored
This register configures the rewrite enable (whether PCP or DSCP value in packet should be updated according to packet priority) per receive port. Signed-off-by:
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Petr Machata authored
The QPTS register controls the port policy to calculate the switch priority and packet color based on incoming packet fields. Signed-off-by:
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Petr Machata authored
The QPDPM register controls the mapping from DSCP field to Switch Priority for IP packets. Signed-off-by:
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Petr Machata authored
On ingress, a network device such as a switch assigns to packets priority based on various criteria. Common options include interpreting PCP and DSCP fields according to user configuration. When a packet egresses the switch, a reverse process may rewrite PCP and/or DSCP values according to packet priority. The following three functions support a) obtaining a DSCP-to-priority map or vice versa, and b) finding default-priority entries in APP database. The DCB subsystem supports for APP entries a very generous M:N mapping between priorities and protocol identifiers. Understandably, several (say) DSCP values can map to the same priority. But this asymmetry holds the other way around as well--one priority can map to several DSCP values. For this reason, the following functions operate in terms of bitmaps, with ones in positions that match some APP entry. - dcb_ieee_getapp_dscp_prio_mask_map() to compute for a given netdevice a map of DSCP-to-priority-mask, which gives for each DSCP value a bitmap of priorities related to that DSCP value by APP, along the lines of dcb_ieee_getapp_mask(). - dcb_ieee_getapp_prio_dscp_mask_map() similarly to compute for a given netdevice a map from priorities to a bitmap of DSCPs. - dcb_ieee_getapp_default_prio_mask() which finds all default-priority rules for a given port in APP database, and returns a mask of priorities allowed by these default-priority rules. Signed-off-by:
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Petr Machata authored
The function dcb_app_lookup walks the list of specified DCB APP entries, looking for one that matches a given criteria: ifindex, selector, protocol ID and optionally also priority. The "don't care" value for priority is set to 0, because that priority has not been allowed under CEE regime, which predates the IEEE standardization. Under IEEE, 0 is a valid priority number. But because dcb_app_lookup considers zero a wild card, attempts to add an APP entry with priority 0 fail when other entries exist for a given ifindex / selector / PID triplet. Fix by changing the wild-card value to -1. Signed-off-by:
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Jiri Pirko authored
In case a chain is empty and not explicitly created by a user, such chain should not exist. The only exception is if there is an action "goto chain" pointing to it. In that case, don't show the chain in the dump. Track the chain references held by actions and use them to find out if a chain should or should not be shown in chain dump. Signed-off-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
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git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-nextDavid S. Miller authored
Steffen Klassert says: ==================== pull request (net-next): ipsec-next 2018-07-27 1) Extend the output_mark to also support the input direction and masking the mark values before applying to the skb. 2) Add a new lookup key for the upcomming xfrm interfaces. 3) Extend the xfrm lookups to match xfrm interface IDs. 4) Add virtual xfrm interfaces. The purpose of these interfaces is to overcome the design limitations that the existing VTI devices have. The main limitations that we see with the current VTI are the following: VTI interfaces are L3 tunnels with configurable endpoints. For xfrm, the tunnel endpoint are already determined by the SA. So the VTI tunnel endpoints must be either the same as on the SA or wildcards. In case VTI tunnel endpoints are same as on the SA, we get a one to one correlation between the SA and the tunnel. So each SA needs its own tunnel interface. On the other hand, we can have only one VTI tunnel with wildcard src/dst tunnel endpoints in the system because the lookup is based on the tunnel endpoints. The existing tunnel lookup won't work with multiple tunnels with wildcard tunnel endpoints. Some usecases require more than on VTI tunnel of this type, for example if somebody has multiple namespaces and every namespace requires such a VTI. VTI needs separate interfaces for IPv4 and IPv6 tunnels. So when routing to a VTI, we have to know to which address family this traffic class is going to be encapsulated. This is a lmitation because it makes routing more complex and it is not always possible to know what happens behind the VTI, e.g. when the VTI is move to some namespace. VTI works just with tunnel mode SAs. We need generic interfaces that ensures transfomation, regardless of the xfrm mode and the encapsulated address family. VTI is configured with a combination GRE keys and xfrm marks. With this we have to deal with some extra cases in the generic tunnel lookup because the GRE keys on the VTI are actually not GRE keys, the GRE keys were just reused for something else. All extensions to the VTI interfaces would require to add even more complexity to the generic tunnel lookup. So to overcome this, we developed xfrm interfaces with the following design goal: It should be possible to tunnel IPv4 and IPv6 through the same interface. No limitation on xfrm mode (tunnel, transport and beet). Should be a generic virtual interface that ensures IPsec transformation, no need to know what happens behind the interface. Interfaces should be configured with a new key that must match a new policy/SA lookup key. The lookup logic should stay in the xfrm codebase, no need to change or extend generic routing and tunnel lookups. Should be possible to use IPsec hardware offloads of the underlying interface. 5) Remove xfrm pcpu policy cache. This was added after the flowcache removal, but it turned out to make things even worse. From Florian Westphal. 6) Allow to update the set mark on SA updates. From Nathan Harold. 7) Convert some timestamps to time64_t. From Arnd Bergmann. 8) Don't check the offload_handle in xfrm code, it is an opaque data cookie for the driver. From Shannon Nelson. 9) Remove xfrmi interface ID from flowi. After this pach no generic code is touched anymore to do xfrm interface lookups. From Benedict Wong. 10) Allow to update the xfrm interface ID on SA updates. From Nathan Harold. 11) Don't pass zero to ERR_PTR() in xfrm_resolve_and_create_bundle. From YueHaibing. 12) Return more detailed errors on xfrm interface creation. From Benedict Wong. 13) Use PTR_ERR_OR_ZERO instead of IS_ERR + PTR_ERR. From the kbuild test robot. ==================== Signed-off-by: -
kbuild test robot authored
net/xfrm/xfrm_interface.c:692:1-3: WARNING: PTR_ERR_OR_ZERO can be used Use PTR_ERR_OR_ZERO rather than if(IS_ERR(...)) + PTR_ERR Generated by: scripts/coccinelle/api/ptr_ret.cocci Fixes: 44e2b838 ("xfrm: Return detailed errors from xfrmi_newlink") CC: Benedict Wong <benedictwong@google.com> Signed-off-by:
kbuild test robot <fengguang.wu@intel.com> Signed-off-by:
Steffen Klassert <steffen.klassert@secunet.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linuxDavid S. Miller authored
Saeed Mahameed says: ==================== mlx5e-updates-2018-07-26 (XDP redirect) This series from Tariq adds the support for device-out XDP redirect. Start with a simple RX and XDP cleanups: - Replace call to MPWQE free with dealloc in interface down flow - Do not recycle RX pages in interface down flow - Gather all XDP pre-requisite checks in a single function - Restrict the combination of large MTU and XDP Since now XDP logic is going to be called from TX side as well, generic XDP TX logic is not RX only anymore, for that Tariq creates a new xdp.c file and moves XDP related code into it, and generalizes the code to support XDP TX for XDP redirect, such as the xdp tx sq structures and xdp counters. XDP redirect support: Add implementation for the ndo_xdp_xmit callback. Dedicate a new set of XDP-SQ instances to satisfy the XDP_REDIRECT requests. These instances are totally separated from the existing XDP-SQ objects that satisfy local XDP_TX actions. Performance tests: xdp_redirect_map from ConnectX-5 to ConnectX-5. CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz Packet-rate of 64B packets. Single queue: 7 Mpps. Multi queue: 55 Mpps. ==================== Signed-off-by: -
Jakub Kicinski authored
The root directories of netdevsim should only be used by the core to create per-device subdirectories, so limit their visibility to the core file. Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Reviewed-by:
Quentin Monnet <quentin.monnet@netronome.com> Signed-off-by:
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David S. Miller authored
Tobin C. Harding says: ==================== docs: net: Convert netdev-FAQ to RST Jon answered all the tree questions on v1 so if you will please take this through your tree that would be awesome. v2: - Fix typo 'canonical_path_format' (thanks Edward) - Add patch fixing references netdev-FAQ ==================== Signed-off-by: -
Tobin C. Harding authored
File 'Documentation/networking/netdev-FAQ.txt' has been converted to RST format. We should update all links/references to point to the new file. Update references to netdev-FAQ Signed-off-by:
Tobin C. Harding <me@tobin.cc> Signed-off-by:
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Tobin C. Harding authored
Preferred kernel docs format is now restructured text. Convert netdev-FAQ.txt to restructured text. - Add SPDX license identifier. - Change file heading 'Information you need to know about netdev' to 'netdev FAQ' to better suit displayed index (in HTML). - Change question/answer layout to suit rst. Copy format in Documentation/bpf/bpf_devel_QA.rst - Fix indentation of code snippets - If multiple consecutive URLs appear put them in a list (to maintain whitespace). - Use uniform spelling of 'bug fix' throughout document (not bugfix or bug-fix). - Add double back ticks to 'net' and 'net-next' when referring to the trees. - Use rst references for Documentation/ links. - Add rst label 'netdev-FAQ' for referencing by other docs files. - Remove stale entry from Documentation/networking/00-INDEX Signed-off-by:
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Tobin C. Harding authored
In preparation to convert Documentation/network/netdev-FAQ.rst to restructured text format. We would like to be able to reference 'the canonical patch format' section. Add rest label: 'the_canonical_patch_format'. Signed-off-by:
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Jia-Ju Bai authored
starfire_init_one() is never called in atomic context. It calls mdelay() to busily wait, which is not necessary. mdelay() can be replaced with msleep(). This is found by a static analysis tool named DCNS written by myself. Signed-off-by:
Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by:
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Jia-Ju Bai authored
hisax_cs_new() and hisax_cs_setup() are never called in atomic context. They call kmalloc() and kzalloc() with GFP_ATOMIC, which is not necessary. GFP_ATOMIC can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by:
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Jia-Ju Bai authored
init_PStack() is never called in atomic context. It calls kmalloc() with GFP_ATOMIC, which is not necessary. GFP_ATOMIC can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by:
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Jia-Ju Bai authored
nj_probe() is never called in atomic context. It calls kzalloc() with GFP_ATOMIC, which is not necessary. GFP_ATOMIC can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by:
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Jia-Ju Bai authored
hfc_probe() is never called in atomic context. It calls kzalloc() with GFP_ATOMIC, which is not necessary. GFP_ATOMIC can be replaced with GFP_KERNEL. This is found by a static analysis tool named DCNS written by myself. Signed-off-by:
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YueHaibing authored
hns_dsaf_roce_reset is exported and used in hns_roce_hw_v1.c In commit 336a443b ("net: hns: Make many functions static") I make it static wrongly. drivers/infiniband/hw/hns/hns_roce_hw_v1.o: In function `hns_roce_v1_reset': hns_roce_hw_v1.c:(.text+0x37ac): undefined reference to `hns_dsaf_roce_reset' hns_roce_hw_v1.c:(.text+0x37cc): undefined reference to `hns_dsaf_roce_reset' Fixes: 336a443b ("net: hns: Make many functions static") Signed-off-by:
YueHaibing <yuehaibing@huawei.com> Signed-off-by:
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- 26 Jul, 2018 10 commits
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Tariq Toukan authored
Use designated function mlx5e_dma_get() to get the mlx5e_sq_dma object to be pushed into fifo. Signed-off-by:
Tariq Toukan <tariqt@mellanox.com> Reviewed-by:
Eran Ben Elisha <eranbe@mellanox.com> Signed-off-by:
Saeed Mahameed <saeedm@mellanox.com>
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Tariq Toukan authored
Pointers in DB are static, move them to read-only area so they do not share a cacheline with fields modified in datapath. Signed-off-by:
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Tariq Toukan authored
A loaded XDP program might write to the xdp_frame data area, prefetchw() it to avoid a potential cache miss. Performance tests: ConnectX-5, XDP_TX packet rate, single ring. CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz Before: 13,172,976 pps After: 13,456,248 pps 2% gain. Fixes: 22f45398 ("net/mlx5e: Support XDP over Striding RQ") Signed-off-by:
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Tariq Toukan authored
Add implementation for the ndo_xdp_xmit callback. Dedicate a new set of XDP-SQ instances to satisfy the XDP_REDIRECT requests. These instances are totally separated from the existing XDP-SQ objects that satisfy local XDP_TX actions. Performance tests: xdp_redirect_map from ConnectX-5 to ConnectX-5. CPU: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz Packet-rate of 64B packets. Single queue: 7 Mpps. Multi queue: 55 Mpps. Signed-off-by:
Eugenia Emantayev <eugenia@mellanox.com> Signed-off-by:
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Tariq Toukan authored
In the downstream patch that adds support to XDP_REDIRECT-out, the XDP xmit frame function doesn't share the same run context as the NAPI that polls the XDP-SQ completion queue. Hence, need to re-order the XDP-SQ fields to avoid cacheline false-sharing. Take redirect_flush and doorbell out of DB, into separated cachelines. Add a cacheline breaker within the stats struct. Signed-off-by:
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Tariq Toukan authored
Separate the XDP counters into two sets: (1) One set reside in the RQ stats, and they monitor XDP stats in the RQ side. (2) Another set is per XDP-SQ, and they monitor XDP stats that are related to XDP transmit flow. Signed-off-by:
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Tariq Toukan authored
Convert the XDP xmit functions to use the generic xdp_frame API in XDP_TX flow. Same functions will be used later in this series to transmit the XDP redirect-out packets as well. Signed-off-by:
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Tariq Toukan authored
Add per-ring and total stats for received packets that goes into XDP redirection. Signed-off-by:
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Tariq Toukan authored
Take XDP code out of the general EN header and RX file into new XDP files. Currently, XDP-SQ resides only within an RQ and used from a single flow (XDP_TX) triggered upon RX completions. In a downstream patch, additional type of XDP-SQ instances will be presented and used for the XDP_REDIRECT flow, totally unrelated to the RX context. Signed-off-by:
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Tariq Toukan authored
Add checks in control path upon an MTU change or an XDP program set, to prevent reaching cases where large MTU and XDP are set simultaneously. This is to make sure we allow XDP only with the linear RX memory scheme, i.e. a received packet is not scattered to different pages. Change mlx5e_rx_get_linear_frag_sz() accordingly, so that we make sure the XDP configuration can really be set, instead of assuming that it is. Signed-off-by:
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