- 23 May, 2018 22 commits
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Jakub Kicinski authored
Changing switch mode may want to register and unregister devlink ports. Therefore similarly to DEVLINK_CMD_PORT_SPLIT/UNSPLIT it should not take the instance lock. Drivers don't depend on existing locking since it's a very recent addition. Signed-off-by:
Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by:
Jiri Pirko <jiri@mellanox.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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Jakub Kicinski authored
nfp_apps can currently associate their structures with vNICs but not representors. Add app priv pointer to representors as well. Signed-off-by:
Dirk van der Merwe <dirk.vandermerwe@netronome.com> Signed-off-by:
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Jakub Kicinski authored
ABM NIC requires more complex vNIC handling, allocate per-vNIC structure. Find out RX queue base and PCI PF id. There will be multiple PFs sharing the same MAC port, therefore the MAC address assigned to the vNIC must be looked up in the HWInfo database. Signed-off-by:
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Jakub Kicinski authored
Add a very rudimentary active buffer management NIC support. For now it's like a core NIC without SR-IOV support. Next commits will extend its functionality. Signed-off-by:
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Jakub Kicinski authored
Current code doesn't enforce length requirements on 32bit accesses with action NFP_CPP_ACTION_RW to memory units, but if the access is only aligned to 4 bytes as well we will fall into the explicit access case and error out. Such accesses are correct, allow them by lowering the width earlier. While at it use a switch statement to improve readability. Signed-off-by:
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Jakub Kicinski authored
Allow app FW to advertise its shared buffer pool information. Use the per-PF mailbox to configure them from devlink. Signed-off-by:
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Jakub Kicinski authored
When working with devlink-related functionality for locking reasons it's easier to create a new mailbox per-PCI PF device than try to use one of the netdev/vNIC mailboxes. Define new mailbox structure and resolve its symbol during probe. For forward compatibility allow silent truncation of mailbox command data. Signed-off-by:
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Jakub Kicinski authored
nfp_net_pf_rtsym_read_optional() and nfp_net_pf_map_rtsym() are not really related to networking code. Move them to the PF code and remove the net from their names. They will soon be needed by code outside of nfp_net_main.c anyway. Signed-off-by:
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David S. Miller authored
Alexei Starovoitov says: ==================== bpfilter v2->v3: - followed Luis's suggestion and significantly simplied first patch with shmem_kernel_file_setup+kernel_write. Added kdoc for new helper - fixed typos and race to access pipes with mutex - tested with bpfilter being 'builtin'. CONFIG_BPFILTER_UMH=y|m both work. Interesting to see a usermode executable being embedded inside vmlinux. - it doesn't hurt to enable bpfilter in .config. ip_setsockopt commands sent to usermode via pipes and -ENOPROTOOPT is returned from userspace, so kernel falls back to original iptables code v1->v2: this patch set is almost a full rewrite of the earlier umh modules approach The v1 of patches and follow up discussion was covered by LWN: https://lwn.net/Articles/749108/ I believe the v2 addresses all issues brought up by Andy and others. Mainly there are zero changes to kernel/module.c Instead of teaching module loading logic to recognize special umh module, let normal kernel modules execute part of its own .init.rodata as a new user space process (Andy's idea) Patch 1 introduces this new helper: int fork_usermode_blob(void *data, size_t len, struct umh_info *info); Input: data + len == executable file Output: struct umh_info { struct file *pipe_to_umh; struct file *pipe_from_umh; pid_t pid; }; Advantages vs v1: - the embedded user mode executable is stored as .init.rodata inside normal kernel module. These pages are freed when .ko finishes loading - the elf file is copied into tmpfs file. The user mode process is swappable. - the communication between user mode process and 'parent' kernel module is done via two unix pipes, hence protocol is not exposed to user space - impossible to launch umh on its own (that was the main issue of v1) and impossible to be man-in-the-middle due to pipes - bpfilter.ko consists of tiny kernel part that passes the data between kernel and umh via pipes and much bigger umh part that doing all the work - 'lsmod' shows bpfilter.ko as usual. 'rmmod bpfilter' removes kernel module and kills corresponding umh - signed bpfilter.ko covers the whole image including umh code Few issues: - the user can still attach to the process and debug it with 'gdb /proc/pid/exe pid', but 'gdb -p pid' doesn't work. (a bit worse comparing to v1) - tinyconfig will notice a small increase in .text +766 | TEXT | 7c8b94806bec umh: introduce fork_usermode_blob() helper ==================== Signed-off-by:
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Alexei Starovoitov authored
bpfilter.ko consists of bpfilter_kern.c (normal kernel module code) and user mode helper code that is embedded into bpfilter.ko The steps to build bpfilter.ko are the following: - main.c is compiled by HOSTCC into the bpfilter_umh elf executable file - with quite a bit of objcopy and Makefile magic the bpfilter_umh elf file is converted into bpfilter_umh.o object file with _binary_net_bpfilter_bpfilter_umh_start and _end symbols Example: $ nm ./bld_x64/net/bpfilter/bpfilter_umh.o 0000000000004cf8 T _binary_net_bpfilter_bpfilter_umh_end 0000000000004cf8 A _binary_net_bpfilter_bpfilter_umh_size 0000000000000000 T _binary_net_bpfilter_bpfilter_umh_start - bpfilter_umh.o and bpfilter_kern.o are linked together into bpfilter.ko bpfilter_kern.c is a normal kernel module code that calls the fork_usermode_blob() helper to execute part of its own data as a user mode process. Notice that _binary_net_bpfilter_bpfilter_umh_start - end is placed into .init.rodata section, so it's freed as soon as __init function of bpfilter.ko is finished. As part of __init the bpfilter.ko does first request/reply action via two unix pipe provided by fork_usermode_blob() helper to make sure that umh is healthy. If not it will kill it via pid. Later bpfilter_process_sockopt() will be called from bpfilter hooks in get/setsockopt() to pass iptable commands into umh via bpfilter.ko If admin does 'rmmod bpfilter' the __exit code bpfilter.ko will kill umh as well. Signed-off-by:
Alexei Starovoitov <ast@kernel.org> Signed-off-by:
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Alexei Starovoitov authored
Introduce helper: int fork_usermode_blob(void *data, size_t len, struct umh_info *info); struct umh_info { struct file *pipe_to_umh; struct file *pipe_from_umh; pid_t pid; }; that GPLed kernel modules (signed or unsigned) can use it to execute part of its own data as swappable user mode process. The kernel will do: - allocate a unique file in tmpfs - populate that file with [data, data + len] bytes - user-mode-helper code will do_execve that file and, before the process starts, the kernel will create two unix pipes for bidirectional communication between kernel module and umh - close tmpfs file, effectively deleting it - the fork_usermode_blob will return zero on success and populate 'struct umh_info' with two unix pipes and the pid of the user process As the first step in the development of the bpfilter project the fork_usermode_blob() helper is introduced to allow user mode code to be invoked from a kernel module. The idea is that user mode code plus normal kernel module code are built as part of the kernel build and installed as traditional kernel module into distro specified location, such that from a distribution point of view, there is no difference between regular kernel modules and kernel modules + umh code. Such modules can be signed, modprobed, rmmod, etc. The use of this new helper by a kernel module doesn't make it any special from kernel and user space tooling point of view. Such approach enables kernel to delegate functionality traditionally done by the kernel modules into the user space processes (either root or !root) and reduces security attack surface of the new code. The buggy umh code would crash the user process, but not the kernel. Another advantage is that umh code of the kernel module can be debugged and tested out of user space (e.g. opening the possibility to run clang sanitizers, fuzzers or user space test suites on the umh code). In case of the bpfilter project such architecture allows complex control plane to be done in the user space while bpf based data plane stays in the kernel. Since umh can crash, can be oom-ed by the kernel, killed by the admin, the kernel module that uses them (like bpfilter) needs to manage life time of umh on its own via two unix pipes and the pid of umh. The exit code of such kernel module should kill the umh it started, so that rmmod of the kernel module will cleanup the corresponding umh. Just like if the kernel module does kmalloc() it should kfree() it in the exit code. Signed-off-by: -
David S. Miller authored
Sudarsana Reddy Kalluru says: ==================== qed*: Add support for management firmware TLV request. Management firmware (MFW) requires config and state information from the driver. It queries this via TLV (type-length-value) request wherein mfw specificies the list of required TLVs. Driver fills the TLV data and responds back to MFW. This patch series adds qed/qede/qedf/qedi driver implementation for supporting the TLV queries from MFW. Changes from previous versions: ------------------------------- v2: Split patch (2) into multiple simpler patches. v2: Update qed_tlv_parsed_buf->p_val datatype to void pointer to avoid bunch of unnecessary typecasts. Please consider applying this series to "net-next". ==================== Signed-off-by: -
Manish Rangankar authored
Signed-off-by:
Manish Rangankar <manish.rangankar@cavium.com> Signed-off-by:
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Manish Rangankar authored
This patch adds callbacks for providing the ethernet protocol driver TLVs. Signed-off-by:
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Chad Dupuis authored
Signed-off-by:
Chad Dupuis <chad.dupuis@cavium.com> Signed-off-by:
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Chad Dupuis authored
This patch adds callbacks for providing the ethernet protocol driver TLVs. Signed-off-by:
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Sudarsana Reddy Kalluru authored
This patch adds callbacks for providing the ethernet protocol driver TLVs. Signed-off-by:
Sudarsana Reddy Kalluru <Sudarsana.Kalluru@cavium.com> Signed-off-by:
Ariel Elior <ariel.elior@cavium.com> Signed-off-by:
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Sudarsana Reddy Kalluru authored
MFW requests the TLVs in interrupt context. Extracting of the required data from upper layers and populating of the TLVs require process context. The patch adds work-queues for processing the tlv requests. It also adds the implementation for requesting the tlv values from appropriate protocol driver. Signed-off-by:
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Sudarsana Reddy Kalluru authored
Signed-off-by:
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Sudarsana Reddy Kalluru authored
Signed-off-by:
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Sudarsana Reddy Kalluru authored
The patch adds driver support for processing TLV requests/repsonses from the mfw and upper driver layers respectively. The implementation reads the requested TLVs from the shared memory, requests the values from upper layer drivers, populates this info (TLVs) shared memory and notifies MFW about the TLV values. Signed-off-by:
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Sudarsana Reddy Kalluru authored
The patch adds required management firmware (MFW) interfaces such as mailbox commands, TLV types etc. Signed-off-by:
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- 22 May, 2018 18 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/next-queueDavid S. Miller authored
Jeff Kirsher says: ==================== 40GbE Intel Wired LAN Driver Updates 2018-05-22 This series contains updates to i40e only. Jake provides all the changes in this series starting with making it consistent in how we approach the bit lock. Fixed the reporting of the VEB statistics and the queue statistics to always return every queue even if it is not currently in use. Use WARN_ONCE() so that the first time we end up with an incorrect size we will dump a stack trace and a message to help highlight the issue early in testing. Folded the fixed string prefix into the stat string definition. Instead of using a separate char *p pointer when copying strings, use the data pointer directly. Added code comments for several of the statistic functions to better explain the number and ordering of statistics. ==================== Signed-off-by: -
David S. Miller authored
Eric Dumazet says: ==================== tcp: reduce quickack pressure for ECN Small patch series changing TCP behavior vs quickack and ECN First patch is a refactoring, adding parameter to tcp_incr_quickack() and tcp_enter_quickack_mode() helpers. Second patch implements the change, lowering number of ACK packets sent after an ECN event. ==================== Signed-off-by: -
Eric Dumazet authored
ECN signals currently forces TCP to enter quickack mode for up to 16 (TCP_MAX_QUICKACKS) following incoming packets. We believe this is not needed, and only sending one immediate ack for the current packet should be enough. This should reduce the extra load noticed in DCTCP environments, after congestion events. This is part 2 of our effort to reduce pure ACK packets. Signed-off-by:
Eric Dumazet <edumazet@google.com> Acked-by:
Soheil Hassas Yeganeh <soheil@google.com> Acked-by:
Yuchung Cheng <ycheng@google.com> Acked-by:
Neal Cardwell <ncardwell@google.com> Signed-off-by:
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Eric Dumazet authored
We want to add finer control of the number of ACK packets sent after ECN events. This patch is not changing current behavior, it only enables following change. Signed-off-by:
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Vlad Buslov authored
Initial net_device implementation used ingress_lock spinlock to synchronize ingress path of device. This lock was used in both process and bh context. In some code paths action map lock was obtained while holding ingress_lock. Commit e1e992e5 ("[NET_SCHED] protect action config/dump from irqs") modified actions to always disable bh, while using action map lock, in order to prevent deadlock on ingress_lock in softirq. This lock was removed from net_device, so disabling bh, while accessing action map, is no longer necessary. Replace all action idr spinlock usage with regular calls that do not disable bh. Signed-off-by:
Vlad Buslov <vladbu@mellanox.com> Acked-by:
Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by:
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David S. Miller authored
David Ahern says: ==================== net/ipv6: Fix route append and replace use cases This patch set fixes a few append and replace uses cases for IPv6 and adds test cases that codifies the expectations of how append and replace are expected to work. In paricular it allows a multipath route to have a dev-only nexthop, something Thomas tried to accomplish with commit edd7ceb7 ("ipv6: Allow non-gateway ECMP for IPv6") which had to be reverted because of breakage, and to replace an existing FIB entry with a reject route. There are a number of inconsistent and surprising aspects to the Linux API for adding, deleting, replacing and changing FIB entries. For example, with IPv4 NLM_F_APPEND means insert the route after any existing entries with the same key (prefix + priority + TOS for IPv4) and NLM_F_CREATE without the append flag inserts the new route before any existing entries. IPv6 on the other hand attempts to guess whether a new route should be appended to an existing one, possibly creating a multipath route, or to add a new entry after any existing ones. This applies to both the 'append' (NLM_F_CREATE + NLM_F_APPEND) and 'prepend' (NLM_F_CREATE only) cases meaning for IPv6 the NLM_F_APPEND is basically ignored. This guessing whether the route should be added to a multipath route (gateway routes) or inserted after existing entries (non-gateway based routes) means a multipath route can not have a dev only nexthop (potentially required in some cases - tunnels or VRF route leaking for example) and route 'replace' is a bit adhoc treating gateway based routes and dev-only / reject routes differently. This has led to frustration with developers working on routing suites such as FRR where workarounds such as delete and add are used instead of replace. After this patch set there are 2 differences between IPv4 and IPv6: 1. 'ip ro prepend' = NLM_F_CREATE only IPv4 adds the new route before any existing ones IPv6 adds new route after any existing ones 2. 'ip ro append' = NLM_F_CREATE|NLM_F_APPEND IPv4 adds the new route after any existing ones IPv6 adds the nexthop to existing routes converting to multipath For the former, there are cases where we want same prefix routes added after existing ones (e.g., multicast, prefix routes for macvlan when used for virtual router redundancy). Requiring the APPEND flag to add a new route to an existing one helps here but is a slight change in behavior since prepend with gateway routes now create a separate entry. For the latter IPv6 behavior is preferred - appending a route for the same prefix and metric to make a multipath route, so really IPv4 not allowing an existing route to be updated is the limiter. This will be fixed when nexthops become separate objects - a future patch set. Thank you to Thomas and Ido for testing earlier versions of this set, and to Ido for providing an update to the mlxsw driver. Changes since RFC - cleanup wording in test script; add comments about expected failures and why ==================== Signed-off-by:
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David Ahern authored
Add IPv4 route tests covering add, append and replace permutations. Assumes the ability to add a basic single path route works; this is required for example when adding an address to an interface. $ fib_tests.sh -t ipv4_rt IPv4 route add / append tests TEST: Attempt to add duplicate route - gw [ OK ] TEST: Attempt to add duplicate route - dev only [ OK ] TEST: Attempt to add duplicate route - reject route [ OK ] TEST: Add new nexthop for existing prefix [ OK ] TEST: Append nexthop to existing route - gw [ OK ] TEST: Append nexthop to existing route - dev only [ OK ] TEST: Append nexthop to existing route - reject route [ OK ] TEST: Append nexthop to existing reject route - gw [ OK ] TEST: Append nexthop to existing reject route - dev only [ OK ] TEST: add multipath route [ OK ] TEST: Attempt to add duplicate multipath route [ OK ] TEST: Route add with different metrics [ OK ] TEST: Route delete with metric [ OK ] IPv4 route replace tests TEST: Single path with single path [ OK ] TEST: Single path with multipath [ OK ] TEST: Single path with reject route [ OK ] TEST: Single path with single path via multipath attribute [ OK ] TEST: Invalid nexthop [ OK ] TEST: Single path - replace of non-existent route [ OK ] TEST: Multipath with multipath [ OK ] TEST: Multipath with single path [ OK ] TEST: Multipath with single path via multipath attribute [ OK ] TEST: Multipath with reject route [ OK ] TEST: Multipath - invalid first nexthop [ OK ] TEST: Multipath - invalid second nexthop [ OK ] TEST: Multipath - replace of non-existent route [ OK ] Signed-off-by:David Ahern <dsahern@gmail.com> Signed-off-by:
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David Ahern authored
Add IPv6 route tests covering add, append and replace permutations. Assumes the ability to add a basic single path route works; this is required for example when adding an address to an interface. $ fib_tests.sh -t ipv6_rt IPv6 route add / append tests TEST: Attempt to add duplicate route - gw [ OK ] TEST: Attempt to add duplicate route - dev only [ OK ] TEST: Attempt to add duplicate route - reject route [ OK ] TEST: Add new route for existing prefix (w/o NLM_F_EXCL) [ OK ] TEST: Append nexthop to existing route - gw [ OK ] TEST: Append nexthop to existing route - dev only [ OK ] TEST: Append nexthop to existing route - reject route [ OK ] TEST: Append nexthop to existing reject route - gw [ OK ] TEST: Append nexthop to existing reject route - dev only [ OK ] TEST: Add multipath route [ OK ] TEST: Attempt to add duplicate multipath route [ OK ] TEST: Route add with different metrics [ OK ] TEST: Route delete with metric [ OK ] IPv6 route replace tests TEST: Single path with single path [ OK ] TEST: Single path with multipath [ OK ] TEST: Single path with reject route [ OK ] TEST: Single path with single path via multipath attribute [ OK ] TEST: Invalid nexthop [ OK ] TEST: Single path - replace of non-existent route [ OK ] TEST: Multipath with multipath [ OK ] TEST: Multipath with single path [ OK ] TEST: Multipath with single path via multipath attribute [ OK ] TEST: Multipath with reject route [ OK ] TEST: Multipath - invalid first nexthop [ OK ] TEST: Multipath - invalid second nexthop [ OK ] TEST: Multipath - replace of non-existent route [ OK ] Signed-off-by: -
David Ahern authored
Add option to pause after each test before cleanup is done. Allows user to do manual inspection or more ad-hoc testing after each test with the setup in tact. Signed-off-by:
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David Ahern authored
Add command line options for controlling pause on fail, controlling specific tests to run and verbose mode rather than relying on environment variables. Signed-off-by:
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David Ahern authored
As more tests are added, it is convenient to have a tally at the end. Signed-off-by:
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David Ahern authored
Bring consistency to ipv6 route replace and append semantics. Remove rt6_qualify_for_ecmp which is just guess work. It fails in 2 cases: 1. can not replace a route with a reject route. Existing code appends a new route instead of replacing the existing one. 2. can not have a multipath route where a leg uses a dev only nexthop Existing use cases affected by this change: 1. adding a route with existing prefix and metric using NLM_F_CREATE without NLM_F_APPEND or NLM_F_EXCL (ie., what iproute2 calls 'prepend'). Existing code auto-determines that the new nexthop can be appended to an existing route to create a multipath route. This change breaks that by requiring the APPEND flag for the new route to be added to an existing one. Instead the prepend just adds another route entry. 2. route replace. Existing code replaces first matching multipath route if new route is multipath capable and fallback to first matching non-ECMP route (reject or dev only route) in case one isn't available. New behavior replaces first matching route. (Thanks to Ido for spotting this one) Note: Newer iproute2 is needed to display multipath routes with a dev-only nexthop. This is due to a bug in iproute2 and parsing nexthops. Signed-off-by: -
David Ahern authored
Handle append for gateway based routes. Dev-only multipath routes will be handled by a follow on patch. Signed-off-by:
Ido Schimmel <idosch@mellanox.com> Signed-off-by:
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Jacob Keller authored
Since we no longer use i as an array index for the data variable, replace the use of 'j' with 'i' so that we match the general loop variable name. Signed-off-by:
Jacob Keller <jacob.e.keller@intel.com> Tested-by:
Andrew Bowers <andrewx.bowers@intel.com> Signed-off-by:
Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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Jacob Keller authored
Add documentation for the i40e_get_stats_count, i40e_get_stat_strings and i40e_get_ethtool_stats explaining that the number and ordering of statistics must remain constant for a given netdevice. Signed-off-by:
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Jacob Keller authored
A future patch is going to add a helper function i40e_add_ethtool_stats that will help lower the amount of boiler plate code in the i40e_get_ethtool_stats function. This conversion will take place over many patches, and the helper function will work by directly updating a reference to the data pointer. Since this would not work combined with the current method of accessing data like an array, update all the code that copies stats into the data buffer to use direct updates to the pointer instead of array accesses. This will prevent incorrect stat updates for patches in between the conversion. Similarly, when copying strings, we used a separate char *p pointer. Instead, use the data pointer directly as it's already a (u8 *) type which is the same size. Signed-off-by:
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Jacob Keller authored
We always prefix these stats with a fixed string, so just fold this prefix into the stat string definition. This preparatory work will make it easier to implement a helper function to copy stats and strings into the supplied buffers in a future patch. Signed-off-by:
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Jacob Keller authored
We don't really want to use BUG_ON here since that would completely crash the kernel, thus the reason we commented it out. We *can't* use BUILD_BUG_ON because at least now (a) the sizes aren't constant (we are fixing this) and (b) not all compilers are smart enough to understand that "p - data" is a constant. Instead, just use a WARN_ONCE so that the first time we end up with an incorrect size we will dump a stack trace and a message, hopefully highlighting the issues early in testing. Signed-off-by:
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