- 12 Sep, 2018 9 commits
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Parav Pandit authored
During resolving address process, during route lookup and while performing src address translation in case of loopback mode, hold the rcu lock so that if netdevice is moving to different net namespace, or being unregistered, it can be synchronized with net/core/dev.c, ie change_net_namespace() ->dev_close_many() ->rt6_uncached_list_flush_dev() who would change dst->dev to loopback device of the given net namespace. Therefore, hold the rcu lock and sync with synchronize_net() of change_net_namespace() to ensure that netdevice cannot get freed while dst->dev is being used. Signed-off-by:
Parav Pandit <parav@mellanox.com> Reviewed-by:
Daniel Jurgens <danielj@mellanox.com> Signed-off-by:
Leon Romanovsky <leonro@mellanox.com> Signed-off-by:
Jason Gunthorpe <jgg@mellanox.com>
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Parav Pandit authored
Set and refer to rdma_dev_addr network type instead of dst->ndev to reduce dependency on accessing dst netdevice. Signed-off-by:
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Parav Pandit authored
Use common code flow for resolving neighbour and for finding source addresses. Signed-off-by:
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Parav Pandit authored
Now that rdma_copy_addr() only copies the source addresses and all callers are interested in copying only source addresses, simplify it to drop the destination address argument. Given that it only copies source layer2 addresses, rename it to rdma_copy_src_l2_addr for better code readability. Signed-off-by:
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Parav Pandit authored
rdma_translate_ip() is done while resolving address for the loopback addresses. The current flow is convoluted with resolve neighbor being optional. This patch simplifies the code in following ways. (a) Use common code between IPv4 and IPv6 for address translation, loopback checks and acquiring netdevice. (b) During neigh resolve in addr_resolve_neigh(), only copy destination address. (c) Always resolve the source address before the destination address, because it doesn't depend on resolving neigh being requested or not. This helps to reduce 3 calls of rdma_copy_addr and rdma_translate_ip to one and makes it easier to follow the code flow. Now that ib_nl_fetch_ha() doesn't depend on dst, drop dst argument from ib_nl_fetch_ha(). Signed-off-by: -
Parav Pandit authored
Current code typecasts destination address using extra variable but uses source address as is. Even though the compiler optimizes such code well, just let each protocol specific function typecast for src and dest both and have symmetric code. Signed-off-by:
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Parav Pandit authored
addr4_resolve() and addr6_resolve() are called by checking the value of sa_family. Both above functions overwrite the value after typecasting, this is not necessary. Signed-off-by:
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Parav Pandit authored
This fixes two issues: 1. When address family is other than IPv4 or v6, rdma_translate_ip() returns success which is incorrect. 2. When address familty is AF_INET6, and if the source address is not found, it returns success, which is also incorrect. Therefore, introduce and use rdma_find_ndev_for_src_ip_rcu() helper function which returns correct success or error status and is also useful for future code refactor in addr_resolve(). Signed-off-by:
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Moni Shoua authored
The transition is allowed from any state and the atrribute mask must be IB_QP_STATE. Fixes: c32a4f29 ("IB/mlx5: Add support for DC Initiator QP") Signed-off-by:
Moni Shoua <monis@mellanox.com> Reviewed-by:
Artemy Kovalyov <artemyko@mellanox.com> Signed-off-by:
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- 11 Sep, 2018 24 commits
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Michael J. Ruhl authored
HFI IRQ enable bits are not being set correctly. Send context error and DC IRQs are not being enabled correctly. In addition, send context error IRQs are not being delivered. Because of this, send context errors are not being handled correctly when they occur. When setting the IRQ bits, if an IRQ range is used, and the last bit is on a register boundary (bit 63), the calculated index for the final register modification is incorrect (index + 1 vs. index). The incorrect index calculation causes incorrect IRQ bits to be set. In this case the send context error IRQ is NOT enabled. Fix by using the 'last' value rather than the counted 'src' value to determine the final index to use. This satisfies all cases. Fixes: a2f7bbdc ("IB/hfi1: Rework the IRQ API to be more flexible") Reviewed-by:
Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by:
Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by:
Michael J. Ruhl <michael.j.ruhl@intel.com> Signed-off-by:
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Michael J. Ruhl authored
If the set_txreq_header_agh() function returns an error, the exit path is chosen. In this path, the code fails to set the return value. This will cause the caller to not realize an error has occurred. Set the return value correctly in the error path. Signed-off-by:
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Michael J. Ruhl authored
Hardware limits the maximum number of packets to u16 packets. Match that size for all relevant sequence numbers in the user_sdma engine. Reviewed-by:
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Michael J. Ruhl authored
Packet queue state is over used to determine SDMA descriptor availablitity and packet queue request state. cpu 0 ret = user_sdma_send_pkts(req, pcount); cpu 0 if (atomic_read(&pq->n_reqs)) cpu 1 IRQ user_sdma_txreq_cb calls pq_update() (state to _INACTIVE) cpu 0 xchg(&pq->state, SDMA_PKT_Q_ACTIVE); At this point pq->n_reqs == 0 and pq->state is incorrectly SDMA_PKT_Q_ACTIVE. The close path will hang waiting for the state to return to _INACTIVE. This can also change the state from _DEFERRED to _ACTIVE. However, this is a mostly benign race. Remove the racy code path. Use n_reqs to determine if a packet queue is active or not. Reviewed-by:
Mitko Haralanov <mitko.haralanov@intel.com> Reviewed-by:
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Michael J. Ruhl authored
pq_update() can only be called in two places: from the completion function when the complete (npkts) sequence of packets has been submitted and processed, or from setup function if a subset of the packets were submitted (i.e. the error path). Currently both paths can call pq_update() if an error occurrs. This race will cause the n_req value to go negative, hanging file_close(), or cause a crash by freeing the txlist more than once. Several variables are used to determine SDMA send state. Most of these are unnecessary, and have code inspectible races between the setup function and the completion function, in both the send path and the error path. The request 'status' value can be set by the setup or by the completion function. This is code inspectibly racy. Since the status is not needed in the completion code or by the caller it has been removed. The request 'done' value races between usage by the setup and the completion function. The completion function does not need this. When the number of processed packets matches npkts, it is done. The 'has_error' value races between usage of the setup and the completion function. This can cause incorrect error handling and leave the n_req in an incorrect value (i.e. negative). Simplify the code by removing all of the unneeded state checks and variables. Clean up iovs node when it is freed. Eliminate race conditions in the error path: If all packets are submitted, the completion handler will set the completion status correctly (ok or aborted). If all packets are not submitted, the caller must wait until the submitted packets have completed, and then set the completion status. These two change eliminate the race condition in the error path. Reviewed-by:
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Dan Carpenter authored
The error code isn't set on this path. Signed-off-by:
Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by:
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Michael J. Ruhl authored
The post_send() path determines if it should post directly or, schedule the post for later. The current logic is: if the swqe ring is empty or (for hfi1) wqe->length <= piothreshold post the send else schedule This can allow large requests to call the send engine directly. Large requests can potentially produce a large number of packets prior to returning to the caller, blocking the caller from posting more requests, and allowing better parallel processing. Allow the driver(s) more say in this logic (pass call_send to the driver, rather than examining a return value). Update hfi1/qib logic to schedule the send engine if an RC or UC message is larger than the QP MTU size. Reviewed-by:Ira Weiny <ira.weiny@intel.com> Signed-off-by:
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zhong jiang authored
debugfs_remove has taken the IS_ERR_OR_NULL into account. Just remove the unnecessary condition. Signed-off-by:
zhong jiang <zhongjiang@huawei.com> Signed-off-by:
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Mark Bloch authored
Currently a matcher can only be created and attached to a NIC RX flow table. Extend it to allow it on NIC TX flow tables as well. In order to achieve that, we: 1) Expose a new attribute: MLX5_IB_ATTR_FLOW_MATCHER_FLOW_FLAGS. enum ib_flow_flags is used as valid flags. Only IB_FLOW_ATTR_FLAGS_EGRESS is supported. 2) Remove the requirement to have a DEVX or QP destination when creating a flow. A flow added to NIC TX flow table will forward the packet outside of the vport (Wire or E-Switch in the SR-iOV case). Signed-off-by:
Mark Bloch <markb@mellanox.com> Reviewed-by:
Yishai Hadas <yishaih@mellanox.com> Signed-off-by:
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Mark Bloch authored
Add the ability to get a NIC TX flow table when using _get_flow_table(). This will allow to create a matcher and a flow rule on the NIC TX path. Signed-off-by:
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Mark Bloch authored
Support attaching flow actions to a flow rule via raw create flow. For now only NIC RX path is supported. This change requires to export flow resources management functions so we can maintain proper bookkeeping of flow actions. Signed-off-by:
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Mark Bloch authored
Move struct mlx5_flow_act to be passed from the method entry point, this will allow to add support for flow action for the raw create flow path. Signed-off-by:
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Mark Bloch authored
We support only a single action type per flow rule, in case the user passes the same type of flow actions fail the flow creation. Signed-off-by:
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Mark Bloch authored
Make the parsing of flow actions more generic so it could be used by mlx5 raw create flow. Signed-off-by:
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Mark Bloch authored
Use ib_set_flow() when initializing flow related resources. Signed-off-by:
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Guy Levi authored
Methods sometimes need to get a flexible set of IDRs and not a strict set as can be achieved today by the conventional IDR attribute. Add a new IDRS_ARRAY attribute to the generic uverbs ioctl layer. IDRS_ARRAY points to array of idrs of the same object type and same access rights, only write and read are supported. Signed-off-by:
Guy Levi <guyle@mellanox.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>`` Signed-off-by:
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Mark Bloch authored
Any matching rules will be mutated based on the packet reformat context which is attached to that given flow rule. Signed-off-by:
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Mark Bloch authored
A L3_TUNNEL_TO_L2 decap flow action requires to enable the encap bit on the flow table, enable it if supported. This will allow to attach those flow actions to NIC RX steering. We don't enable if running on a representor. Signed-off-by:
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Mark Bloch authored
Any matching packet will be stripped of it's VXLAN tunnel, only the inner L2 onward is left. The user will receive the decapsulated packet. Signed-off-by:
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Mark Bloch authored
If NIC RX flow tables support decap operation, enable it on creation, This allows to perform decapsulation of tunnelled packets by steering rules. If NIC TX flow tables support reformat operation, enable it on creation. We don't enable those capabilities on representors as the E-Switch should handle packet modification (can be configured via TC) and as current hardware can't handle both FDB and NIC flow tables with decap/packet reformat support. Signed-off-by:
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Mark Bloch authored
When creating a flow steering rule, allow the user to attach a modify header action. Signed-off-by:
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Mark Bloch authored
Just like ingress steering, allow a user to create steering rules that match egress vport traffic. We expose the same number of priorities as the bypass (NIC RX) steering. Signed-off-by:
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Chuck Lever authored
Add helpful warning for RDMA consumer implementers. Signed-off-by:
Chuck Lever <chuck.lever@oracle.com> Signed-off-by:
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Chuck Lever authored
Code audit suggests that the RDMA CM event handler callback function is _always_ invoked in a context that is safe to block. That's important for consumer implementers to know, so document that in the comment before rdma_create_id (where the handler function is set up by the consumer). Signed-off-by:
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- 06 Sep, 2018 7 commits
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Parav Pandit authored
Even though device->ifindex is assigned before adding the device in the list which is read by netlink flow, it is better to assign rdma device index before publishing the device in the system to users and clients. Signed-off-by:
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Parav Pandit authored
During register_device() init sequence is, (a) register with rdma cgroup followed by (b) register with sysfs Therefore, unregister_device() sequence should follow the reverse order. Signed-off-by:
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Leon Romanovsky authored
Lockdep engine handles correctly downgrade of locks and it simply incorrect to disable lockdep checks prior to calling mmu_notifier. Remove lockdep_off and ensure locks correctness. Signed-off-by:
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Parav Pandit authored
Even though device registration/unregistration and client registration/unregistration is not a performance path, define the client_data_lock as rwlock for code clarity. Signed-off-by:
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Parav Pandit authored
add_client_context(), ib_unregister_device() and ib_unregister_client() are designed to call from blocking context. There is no need to save and restore last interrupt state when called from such blocking context. Even though this is not a performance path, using the right spin lock API is desired for code clarity. To avoid checkpatch warning while removing flags, sizeof() is used. Signed-off-by:
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Parav Pandit authored
While unregistering a device, remove the context elements from the list to not have any stale entries. With that any errors/bugs can be checked when device is freed. Signed-off-by:
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Parav Pandit authored
While traversing client_data_list in following conditions, linked list is only read, no elements of the list are removed. Therefore, use list_for_each_entry(), instead of list_for_each_safe(). Signed-off-by:
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