- 01 Jun, 2020 40 commits
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Anton Protopopov authored
For write-only stacks and queues bpf_map_update_elem should be allowed, but bpf_map_lookup_elem and bpf_map_lookup_and_delete_elem should fail with EPERM. Signed-off-by:
Anton Protopopov <a.s.protopopov@gmail.com> Signed-off-by:
Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20200527185700.14658-6-a.s.protopopov@gmail.comSigned-off-by:
Alexei Starovoitov <ast@kernel.org>
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Anton Protopopov authored
The map_lookup_and_delete_elem() function should check for both FMODE_CAN_WRITE and FMODE_CAN_READ permissions because it returns a map element to user space. Fixes: bd513cd0 ("bpf: add MAP_LOOKUP_AND_DELETE_ELEM syscall") Signed-off-by:
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Anton Protopopov authored
Make comments inside the test_map_rdonly and test_map_wronly tests consistent with logic. Signed-off-by:
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Anton Protopopov authored
The test_map_rdonly and test_map_wronly tests should close file descriptors which they open. Signed-off-by:
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Anton Protopopov authored
Trivial fix to a typo in the test_map_wronly test: "read" -> "write" Signed-off-by:
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Eelco Chaudron authored
In case the cpu_bufs are sparsely allocated they are not all free'ed. These changes will fix this. Fixes: fb84b822 ("libbpf: add perf buffer API") Signed-off-by:
Eelco Chaudron <echaudro@redhat.com> Signed-off-by:
Andrii Nakryiko <andriin@fb.com> Link: https://lore.kernel.org/bpf/159056888305.330763.9684536967379110349.stgit@ebuildSigned-off-by:
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John Fastabend authored
Lets test using probe* in SCHED_CLS network programs as well just to be sure these keep working. Its cheap to add the extra test and provides a second context to test outside of sk_msg after we generalized probe* helpers to all networking types. Signed-off-by:
John Fastabend <john.fastabend@gmail.com> Signed-off-by:
Yonghong Song <yhs@fb.com> Acked-by:
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John Fastabend authored
The test itself is not particularly useful but it encodes a common pattern we have. Namely do a sk storage lookup then depending on data here decide if we need to do more work or alternatively allow packet to PASS. Then if we need to do more work consult task_struct for more information about the running task. Finally based on this additional information drop or pass the data. In this case the suspicious check is not so realisitic but it encodes the general pattern and uses the helpers so we test the workflow. This is a load test to ensure verifier correctly handles this case. Signed-off-by:
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John Fastabend authored
Add helpers to use local socket storage. Signed-off-by:
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John Fastabend authored
Often it is useful when applying policy to know something about the task. If the administrator has CAP_SYS_ADMIN rights then they can use kprobe + networking hook and link the two programs together to accomplish this. However, this is a bit clunky and also means we have to call both the network program and kprobe program when we could just use a single program and avoid passing metadata through sk_msg/skb->cb, socket, maps, etc. To accomplish this add probe_* helpers to bpf_base_func_proto programs guarded by a perfmon_capable() check. New supported helpers are the following, BPF_FUNC_get_current_task BPF_FUNC_probe_read_user BPF_FUNC_probe_read_kernel BPF_FUNC_probe_read_user_str BPF_FUNC_probe_read_kernel_str Signed-off-by:
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John Fastabend authored
Add these generic helpers that may be useful to use from sk_msg programs. The helpers do not depend on ctx so we can simply add them here, BPF_FUNC_perf_event_output BPF_FUNC_get_current_uid_gid BPF_FUNC_get_current_pid_tgid BPF_FUNC_get_current_cgroup_id BPF_FUNC_get_current_ancestor_cgroup_id BPF_FUNC_get_cgroup_classid Signed-off-by:
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Yauheni Kaliuta authored
Since dynamic symbols are used for dynamic linking it makes sense to use them (readelf --dyn-syms) for abi check. Found with some configuration on powerpc where linker puts local *.plt_call.* symbols into .so. Signed-off-by:
Yauheni Kaliuta <yauheni.kaliuta@redhat.com> Signed-off-by:
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Chris Packham authored
Change 'handeled' to 'handled'. Signed-off-by:
Chris Packham <chris.packham@alliedtelesis.co.nz> Signed-off-by:
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Nikolay Borisov authored
Current 'make install' results in only pkg-config and library binaries being installed. For consistency also install headers as part of "make install" Signed-off-by:
Nikolay Borisov <nborisov@suse.com> Signed-off-by:
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Eelco Chaudron authored
This new API, perf_buffer__consume, can be used as follows: - When you have a perf ring where wakeup_events is higher than 1, and you have remaining data in the rings you would like to pull out on exit (or maybe based on a timeout). - For low latency cases where you burn a CPU that constantly polls the queues. Signed-off-by:
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Lukas Bulwahn authored
Commit 2b43470a ("xsk: Introduce AF_XDP buffer allocation API") added a new header file include/net/xsk_buff_pool.h, but commit 28bee21d ("MAINTAINERS, xsk: Update AF_XDP section after moves/adds") added a file entry referring to include/net/xsk_buffer_pool.h. Hence, ./scripts/get_maintainer.pl --self-test=patterns complains: warning: no file matches F: include/net/xsk_buffer_pool.h Adjust the entry in XDP SOCKETS to the actual file name. Signed-off-by:
Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by:
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Jakub Sitnicki authored
System calls encode returned errors as negative values. Fix a typo that breaks this convention for bpf(LINK_UPDATE) when bpf_link doesn't support update operation. Fixes: f9d04127 ("bpf: Refactor bpf_link update handling") Signed-off-by:
Jakub Sitnicki <jakub@cloudflare.com> Signed-off-by:
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Tobias Klauser authored
btf__parse_raw and btf__parse_elf return negative error numbers wrapped in an ERR_PTR, so the extracted value needs to be negated before passing them to strerror which expects a positive error number. Before: Error: failed to load BTF from .../vmlinux: Unknown error -2 After: Error: failed to load BTF from .../vmlinux: No such file or directory Signed-off-by:
Tobias Klauser <tklauser@distanz.ch> Signed-off-by:
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Quentin Monnet authored
Following the introduction of CAP_BPF, and the switch from CAP_SYS_ADMIN to other capabilities for various BPF features, update the capability checks (and potentially, drops) in bpftool for feature probes. Because bpftool and/or the system might not know of CAP_BPF yet, some caution is necessary: - If compiled and run on a system with CAP_BPF, check CAP_BPF, CAP_SYS_ADMIN, CAP_PERFMON, CAP_NET_ADMIN. - Guard against CAP_BPF being undefined, to allow compiling bpftool from latest sources on older systems. If the system where feature probes are run does not know of CAP_BPF, stop checking after CAP_SYS_ADMIN, as this should be the only capability required for all the BPF probing. - If compiled from latest sources on a system without CAP_BPF, but later executed on a newer system with CAP_BPF knowledge, then we only test CAP_SYS_ADMIN. Some probes may fail if the bpftool process has CAP_SYS_ADMIN but misses the other capabilities. The alternative would be to redefine the value for CAP_BPF in bpftool, but this does not look clean, and the case sounds relatively rare anyway. Note that libcap offers a cap_to_name() function to retrieve the name of a given capability (e.g. "cap_sys_admin"). We do not use it because deriving the names from the macros looks simpler than using cap_to_name() (doing a strdup() on the string) + cap_free() + handling the case of failed allocations, when we just want to use the name of the capability in an error message. The checks when compiling without libcap (i.e. root versus non-root) are unchanged. v2: - Do not allocate cap_list dynamically. - Drop BPF-related capabilities when running with "unprivileged", even if we didn't have the full set in the first place (in v1, we would skip dropping them in that case). - Keep track of what capabilities we have, print the names of the missing ones for privileged probing. - Attempt to drop only the capabilities we actually have. - Rename a couple variables. Signed-off-by:
Quentin Monnet <quentin@isovalent.com> Signed-off-by:
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Quentin Monnet authored
This is a clean-up for the formatting of the do_help functions for bpftool's subcommands. The following fixes are included: - Do not use argv[-2] for "iter" help message, as the help is shown by default if no "iter" action is selected, resulting in messages looking like "./bpftool bpftool pin...". - Do not print unused HELP_SPEC_PROGRAM in help message for "bpftool link". - Andrii used argument indexing to avoid having multiple occurrences of bin_name and argv[-2] in the fprintf() for the help message, for "bpftool gen" and "bpftool link". Let's reuse this for all other help functions. We can remove up to thirty arguments for the "bpftool map" help message. - Harmonise all functions, e.g. use ending quotes-comma on a separate line. Signed-off-by:
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Vladimir Oltean authored
Newer C compilers are complaining about the fact that there are no function prototypes in sja1105_vl.c for the non-static functions. Give them what they want. Signed-off-by:
Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by:
Florian Fainelli <f.fainelli@gmail.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Jeff Kirsher says: ==================== 100GbE Intel Wired LAN Driver Updates 2020-05-31 This series contains updates to the ice driver only. Brett modifies the driver to allow users to clear a VF's administratively set MAC address on the PF. Fixes the driver to recognize an existing VLAN tag when DMAC/SMAC is enabled in a packet. Fixes an issue, so that VF's are reset after any VF port VLAN modifications are made on the PF. Made sure the register QRXFLXP_CNTXT is cleared before writing a new value to ensure the previous value is not passed forward. Updates the PF to allow the VF to request a reset as soon as it has been initialized. Fixes an issue to ensure when a VSI is created, it uses the current coalesce value, not the default value. Paul allows untrusted VF's to add 16 filters. Dan increases the timeout needed after a PFR to allow ample time for package download. Chinh adjust the define value for the number of PHY speeds we currently support. Changes the driver to ignore EMODE error when configuring the PHY. Jesse fixes an issue which was preventing a user from configuring the interface before bringing it up. Henry fixes the logic for adding back perfect flows after flow director filter does a deletion. Bruce fixes line wrappings to make it more consistent. ==================== Signed-off-by: -
Roopa Prabhu authored
fix dereference of nexthop group in fdb nexthop group update validation path. Fixes: 1274e1cc ("vxlan: ecmp support for mac fdb entries") Reported-by:
Ido Schimmel <idosch@idosch.org> Suggested-by:
Roopa Prabhu <roopa@cumulusnetworks.com> Signed-off-by:
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Al Viro authored
no point getting compat_cmsghdr field-by-field Signed-off-by:
Al Viro <viro@zeniv.linux.org.uk> Signed-off-by:
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David S. Miller authored
Ioana Ciornei says: ==================== dpaa2-eth: add PFC support This patch set adds support for Priority Flow Control in DPAA2 Ethernet devices. The first patch make the necessary changes so that multiple traffic classes are configured. The dequeue priority of the maximum 8 traffic classes is configured to be equal. The second patch adds a static distribution to said traffic classes based on the VLAN PCP field. In the future, this could be extended through the .setapp() DCB callback for dynamic configuration. Also, add support for the congestion group taildrop mechanism that allows us to control the number of frames that can accumulate on a group of Rx frame queues belonging to the same traffic class. The basic subset of the DCB ops is implemented so that the user can query the number of PFC capable traffic classes, their state and reconfigure them if necessary. Changes in v3: - add patches 6-7 which add the PFC functionality - patch 2/7: revert to explicitly cast mask to u16 * to not get into sparse warnings Changes in v4: - really fix the sparse warnings in 2/7 ==================== Signed-off-by: -
Ioana Ciornei authored
Leave congestion group taildrop enabled for all traffic classes when PFC is enabled. Notification threshold is low enough such that it will be hit first and this also ensures that FQs on traffic classes which are not PFC enabled won't drain the buffer pool. FQ taildrop threshold is kept disabled as long as any form of flow control is on. Since FQ taildrop works with bytes, not number of frames, we can't guarantee it will not interfere with the congestion notification mechanism for all frame sizes. Signed-off-by:
Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by:
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Ioana Ciornei authored
Add support in dpaa2-eth for PFC (Priority Flow Control) through the DCB ops. Instruct the hardware to respond to received PFC frames. Current firmware doesn't allow us to selectively enable PFC on the Rx side for some priorities only, so we will react to all incoming PFC frames (and stop transmitting on the traffic classes specified in the frame). Also, configure the hardware to generate PFC frames based on Rx congestion notifications. When a certain number of frames accumulate in the ingress queues corresponding to a traffic class, priority flow control frames are generated for that TC. The number of PFC traffic classes available can be queried through lldptool. Also, which of those traffic classes have PFC enabled is also controlled through the same dcbnl_rtnl_ops callbacks. Signed-off-by:
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Ioana Radulescu authored
Now that we have congestion group taildrop configured at all times, we can afford to increase the frame queue taildrop threshold; this will ensure a better response when receiving bursts of large-sized frames. Also decouple the buffer pool count from the Rx FQ taildrop threshold, as above change would increase it too much. Instead, keep the old count as a hardcoded value. With the new limits, we try to ensure that: * we allow enough leeway for large frame bursts (by buffering enough of them in queues to avoid heavy dropping in case of bursty traffic, but when overall ingress bandwidth is manageable) * allow pending frames to be evenly spread between ingress FQs, regardless of frame size * avoid dropping frames due to the buffer pool being empty; this is not a bad behaviour per se, but system overall response is more linear and predictable when frames are dropped at frame queue/group level. Signed-off-by:
Ioana Radulescu <ruxandra.radulescu@nxp.com> Signed-off-by:
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Ioana Radulescu authored
The increase in number of ingress frame queues means we now risk depleting the buffer pool before the FQ taildrop kicks in. Congestion group taildrop allows us to control the number of frames that can accumulate on a group of Rx frame queues belonging to the same traffic class. This setting coexists with the frame queue based taildrop: whichever limit gets hit first triggers the frame drop. Signed-off-by:
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Ioana Radulescu authored
Add convenient helper functions that determines whether Rx/Tx pause frames are enabled based on link state flags received from firmware. Signed-off-by:
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Ioana Radulescu authored
Configure static ingress classification based on VLAN PCP field. If the DPNI doesn't have enough traffic classes to accommodate all priority levels, the lowest ones end up on TC 0 (default on miss). Signed-off-by:
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Ioana Radulescu authored
The firmware reserves for each DPNI a number of RX frame queues equal to the number of configured flows x number of configured traffic classes. Current driver configuration directs all incoming traffic to FQs corresponding to TC0, leaving all other priority levels unused. Start adding support for multiple ingress traffic classes, by configuring the FQs associated with all priority levels, not just TC0. All settings that are per-TC, such as those related to hashing and flow steering, are also updated. Signed-off-by:
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Michael Walle authored
Don't export __bcm_phy_enable_rdb_access() and __bcm_phy_enable_legacy_access() functions. They aren't used outside this module and it was forgotten to provide a prototype for these functions. Just make them static for now. Fixes: 11ecf8c5 ("net: phy: broadcom: add cable test support") Reported-by:
kbuild test robot <lkp@intel.com> Signed-off-by:
Michael Walle <michael@walle.cc> Reviewed-by:
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Willem de Bruijn authored
Tun in IFF_NAPI_FRAGS mode calls napi_gro_frags. Unlike netif_rx and netif_gro_receive, this expects skb->data to point to the mac layer. But skb_probe_transport_header, __skb_get_hash_symmetric, and xdp_do_generic in tun_get_user need skb->data to point to the network header. Flow dissection also needs skb->protocol set, so eth_type_trans has to be called. Ensure the link layer header lies in linear as eth_type_trans pulls ETH_HLEN. Then take the same code paths for frags as for not frags. Push the link layer header back just before calling napi_gro_frags. By pulling up to ETH_HLEN from frag0 into linear, this disables the frag0 optimization in the special case when IFF_NAPI_FRAGS is used with zero length iov[0] (and thus empty skb->linear). Fixes: 90e33d45 ("tun: enable napi_gro_frags() for TUN/TAP driver") Signed-off-by:
Willem de Bruijn <willemb@google.com> Acked-by:
Petar Penkov <ppenkov@google.com> Signed-off-by:
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Guillaume Nault authored
Compiling with W=1 gives the following warning: net/sched/cls_flower.c:731:1: warning: ‘mpls_opts_policy’ defined but not used [-Wunused-const-variable=] The TCA_FLOWER_KEY_MPLS_OPTS contains a list of TCA_FLOWER_KEY_MPLS_OPTS_LSE. Therefore, the attributes all have the same type and we can't parse the list with nla_parse*() and have the attributes validated automatically using an nla_policy. fl_set_key_mpls_opts() properly verifies that all attributes in the list are TCA_FLOWER_KEY_MPLS_OPTS_LSE. Then fl_set_key_mpls_lse() uses nla_parse_nested() on all these attributes, thus verifying that they have the NLA_F_NESTED flag. So we can safely drop the mpls_opts_policy. Reported-by:
Guillaume Nault <gnault@redhat.com> Signed-off-by:
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David S. Miller authored
Horatiu Vultur says: ==================== bridge: mrp: Add support for MRA role This patch series extends the MRP with the MRA role. A node that has the MRA role can behave as a MRM or as a MRC. In case there are multiple nodes in the topology that has the MRA role then only one node can behave as MRM and all the others need to be have as MRC. The node that has the higher priority(lower value) will behave as MRM. A node that has the MRA role and behaves as MRC, it just needs to forward the MRP_Test frames between the ring ports but also it needs to detect in case it stops receiving MRP_Test frames. In that case it would try to behave as MRM. v2: - add new patch that fixes sparse warnings - fix parsing of prio attribute ==================== Signed-off-by: -
Horatiu Vultur authored
A node that has the MRA role, it can behave as MRM or MRC. Initially it starts as MRM and sends MRP_Test frames on both ring ports. If it detects that there are MRP_Test send by another MRM, then it checks if these frames have a lower priority than itself. In this case it would send MRP_Nack frames to notify the other node that it needs to stop sending MRP_Test frames. If it receives a MRP_Nack frame then it stops sending MRP_Test frames and starts to behave as a MRC but it would continue to monitor the MRP_Test frames send by MRM. If at a point the MRM stops to send MRP_Test frames it would get the MRM role and start to send MRP_Test frames. Signed-off-by:
Horatiu Vultur <horatiu.vultur@microchip.com> Signed-off-by:
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Horatiu Vultur authored
Each MRP instance has a priority, a lower value means a higher priority. The priority of MRP instance is stored in MRP_Test frame in this way all the MRP nodes in the ring can see other nodes priority. Signed-off-by:
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Horatiu Vultur authored
Replace u16/u32 with be16/be32 in the MRP frame types. This fixes sparse warnings like: warning: cast to restricted __be16 Signed-off-by:
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Jia-Ju Bai authored
The value adapter->rss_conf is stored in DMA memory, and it is assigned to rssConf, so rssConf->indTableSize can be modified at anytime by malicious hardware. Because rssConf->indTableSize is assigned to n, buffer overflow may occur when the code "rssConf->indTable[n]" is executed. To fix this possible bug, n is checked after being used. Signed-off-by:
Jia-Ju Bai <baijiaju1990@gmail.com> Signed-off-by:
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