- 04 Apr, 2018 6 commits
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Parav Pandit authored
Now that the IB core GID cache ensures that a zero GID doesn't exist in the GID table remove zero GID checks from the provider drivers for clarity. Reviewed-by:
Mark Bloch <markb@mellanox.com> Signed-off-by:
Parav Pandit <parav@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
Code is refactored to prepare separate functions for RoCE which can do more complex operations related to reference counting, while still maintainining code readability. This includes (a) Simplification to not perform netdevice checks and modifications for IB link layer. (b) Do not add RoCE GID entry which has NULL netdevice; instead return an error. (c) If GID addition fails at provider level add_gid(), do not add the entry in the cache and keep the entry marked as INVALID. (d) Simplify and reuse the ib_cache_gid_add()/del() routines so that they can be used even for modifying default GIDs. This avoid some code duplication in modifying default GIDs. (e) find_gid() routine refers to the data entry flags to qualify a GID as valid or invalid GID rather than depending on attributes and zeroness of the GID content. (f) gid_table_reserve_default() sets the GID default attribute at beginning while setting up the GID table. There is no need to use default_gid flag in low level functions such as write_gid(), add_gid(), del_gid(), as they never need to update the DEFAULT property of the GID entry while during GID table update. As as result of this refactor, reserved GID 0:0:0:0:0:0:0:0 is no longer searchable as described below. A unicast GID entry of 0:0:0:0:0:0:0:0 is Reserved GID as per the IB spec version 1.3 section 4.1.1, point (6) whose snippet is below. "The unicast GID address 0:0:0:0:0:0:0:0 is reserved - referred to as the Reserved GID. It shall never be assigned to any endport. It shall not be used as a destination address or in a global routing header (GRH)." GID table cache now only stores valid GID entries. Before this patch, Reserved GID 0:0:0:0:0:0:0:0 was searchable in the GID table using ib_find_cached_gid_by_port() and other similar find routines. Zero GID is no longer searchable as it shall not to be present in GRH or path recored entry as described in IB spec version 1.3 section 4.1.1, point (6), section 12.7.10 and section 12.7.20. ib_cache_update() is simplified to check link layer once, use unified locking scheme for all link layers, removed temporary gid table allocation/free logic. Additionally, (a) Expand ib_gid_attr to store port and index so that GID query routines can get port and index information from the attribute structure. (b) Expand ib_gid_attr to store device as well so that in future code when GID reference counting is done, device is used to reach back to the GID table entry. Signed-off-by:
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Parav Pandit authored
Currently following inconsistencies exist. 1. ib_query_gid() returns GID from the software cache for a RoCE port and returns GID from the HCA for an IB port. This is incorrect because software GID cache is maintained regardless of HCA port type. 2. GID is queries from the HCA via ib_query_gid and updated in the software cache for IB link layer. Both of them might not be in sync. ULPs such as SRP initiator, SRP target, IPoIB driver have historically used ib_query_gid() API to query the GID. However CM used cached version during CM processing, When software cache was introduced, this inconsitency remained. In order to simplify, improve readability and avoid link layer specific above inconsistencies, this patch brings following changes. 1. ib_query_gid() always refers to the cache layer regardless of link layer. 2. cache module who reads the GID entry from HCA and builds the cache, directly invokes the HCA provider verb's query_gid() callback function. 3. ib_query_port() is being called in early stage where GID cache is not yet build while reading port immutable property. Therefore it needs to read the default GID from the HCA for IB link layer to publish the subnet prefix. Signed-off-by:
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Parav Pandit authored
ib_query_gid() fetches the GID from the software cache maintained in ib_core for RoCE ports. Therefore, simplify the provider drivers for RoCE to treat query_gid() callback as never called for RoCE, and only require non-RoCE devices to implement it. Signed-off-by:
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Parav Pandit authored
query_gid() should return right GID value for iWarp and IB link layers. It is a no-op for RoCE link layer. Update the documentation to reflect this. Signed-off-by:
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Roland Dreier authored
Check to make sure that ctx->cm_id->device is set before we use it. Otherwise userspace can trigger a NULL dereference by doing RDMA_USER_CM_CMD_SET_OPTION on an ID that is not bound to a device. Cc: <stable@vger.kernel.org> Reported-by: <syzbot+a67bc93e14682d92fc2f@syzkaller.appspotmail.com> Signed-off-by:
Roland Dreier <roland@purestorage.com> Signed-off-by:
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- 03 Apr, 2018 5 commits
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Parav Pandit authored
qedr driver's add_gid() and del_gid() callbacks are doing simple checks which are already done by the ib core before invoking these callback routines. Therefore, code is simplified to skip implementing add_gid() and del_gid() callback functions. Signed-off-by:
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Shiraz Saleem authored
Support for resource profile 1 is currenlty deprecated due to a pre-production errata. Remove this workaround as its no longer needed. Signed-off-by:
Shiraz Saleem <shiraz.saleem@intel.com> Signed-off-by:
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Jason Gunthorpe authored
This structure is pushed down the ex and the non-ex path, so it needs to be aligned to 8 bytes to go through ex without implicit padding. Old user space will provide 4 bytes of resp on !ex and 8 bytes on ex, so take the approach of just copying the minimum length. New user space will consistently provide 8 bytes in both cases. Signed-off-by:
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Gustavo A. R. Silva authored
Check on return values and goto label mbx_err are unnecessary. Addresses-Coverity-ID: 1271151 ("Identical code for different branches") Addresses-Coverity-ID: 1268788 ("Identical code for different branches") Signed-off-by:Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by:
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Yuval Shaia authored
This structure is not needed since the introduction of commit 'c4268778 ("IB/ipoib: Scatter-Gather support in connected mode")' Signed-off-by:
Yuval Shaia <yuval.shaia@oracle.com> Reviewed-by:
Zhu Yanjun <yanjun.zhu@oracle.com> Signed-off-by:
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- 29 Mar, 2018 8 commits
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Bharat Potnuri authored
c4iw_ep_common structure holds the mapped addresses, so while printing them, use appropriate pointers. Fixes: bab572f1 ("iw_cxgb4: Guard against null cm_id in dump_ep/qp") Signed-off-by:
Potnuri Bharat Teja <bharat@chelsio.com> Signed-off-by:
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Parav Pandit authored
rdma_cm_state enum is internal to rdma_cm kernel module. It is not required to expose state enums to ULP modules. So lets keep its scope limited to rdma_cm module in cma_priv.h file. Signed-off-by:
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Parav Pandit authored
Make dst_entry pointer as const struct dst_entry* to improve code readablity to make sure that dst structure fields are not modified by various functions which are using it. Signed-off-by:
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Jason Gunthorpe authored
This is already used in many places, get the rest of them too, only to make the code a bit clearer & simpler. Signed-off-by: -
Leon Romanovsky authored
Export the net device name and index to easily find connection between IB devices and relevant net devices. We also updated the comment regarding the devices without FW. Signed-off-by:
Steve Wise <swise@opengridcomputing.com> Signed-off-by:
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Zhu Yanjun authored
In mcast recv process, the function skb_clone is used. In fact, the refcount can be increased to replace cloning a new skb since the original skb will not be modified before it is freed. This can make the performance better and save the memory. CC: Srinivas Eeda <srinivas.eeda@oracle.com> CC: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by:
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Colin Ian King authored
Trivial fix to spelling mistake in DP_ERR message text Signed-off-by:
Colin Ian King <colin.king@canonical.com> Reviewed-by:
Shamir Rabinovitch <shamir.rabinovitch@oracle.com> Signed-off-by:
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Steve Wise authored
Since the rdma_port_space enum is being passed between user and kernel for user cm_id setup, we need it in a UAPI header. So add it to rdma_user_cm.h. This also fixes the cm_id restrack changes which pass up the port space value via the RDMA_NLDEV_ATTR_RES_PS attribute. Fixes: 00313983 ("RDMA/nldev: provide detailed CM_ID information") Signed-off-by:
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- 28 Mar, 2018 1 commit
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Steve Wise authored
This is no longer supported, so remove it. Signed-off-by:
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- 27 Mar, 2018 16 commits
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Parav Pandit authored
IB core maintains the GID cache entries for the GID table. This cache table has to be maintained regardless of HCA's support of GID table. For IB and iWarp ports, cache is created by querying the HCA. For RoCE cache is created based on netdev events. Therefore just refer to the RoCE port property of the {device, port} to decide whether to build cache by querying HCA or from netdev events. There is no need to check if HCA support GID table or not. ib_cache_update() referred to RoCE attribute before validating port. Though in all current callers port is valid, it is incorrect to query RoCE port property before validating the port. Therefore, rdma_protocol_roce() check is done after rdma_is_port_valid() verifies that port is valid. Fixes: 115b68aa ("IB/ocrdma: Removed GID add/del null routines") Reviewed-by:Daniel Jurgens <danielj@mellanox.com> Signed-off-by:
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Parav Pandit authored
Even though API is only used by IPoIB driver, its incorrect to refer RoCE GID table property to search for GID. Look for only IB link layer to search for the GID. Fixes: dbb12562 ("IB/{core, ipoib}: Simplify ib_find_gid to search only for IB link layer") Signed-off-by:
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Parav Pandit authored
ib_find_gid_by_filter() searches GID with filter only for RoCE link layer regardless of HCA's support for GID table. Therefore, right way to lookup is compare RoCE port property and not the GID table property. Fixes: 99b27e3b ("IB/cache: Add ib_find_gid_by_filter cache API") Signed-off-by:
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Parav Pandit authored
Due to following reasons, GID table event is generated regardless of GID table property. 1. GID table cache is maintained at ib core layer regardless of link layer. 2. GID change event has no relation with IB link layer. 3. GID change event also doesn't depend on whether HCA supports GID table or not. Fixes: f3906bd3 ("IB/core: Refactor GID cache's ib_dispatch_event") Signed-off-by:
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Parav Pandit authored
Due to below reasons, it is better to not support alternate path receive messages for RoCE in near term. 1. Alternate path for RoCE is not supported at rdmacm layer. 2. It is not supported in uverbs/core layer for RoCE. 3. Alternate path for IPv6 for link local address cannot resolve route determinstically without a valid incoming interface id whose usecase make sense only with dual port mode. 4. init_av_from_path while processing LAP messages for IB and RoCE can lead to adding duplicate entry of AV into the port list, leads to list corruption. 5. rdma-core userspace a well known userspace implementation has removed support of libucm which use ucm.ko module, which is the only module that can trigger alternate path related messages. 6. ucm kernel module is requested to be removed from the IB core in patch [1]. [1] https://patchwork.kernel.org/patch/10268503/Signed-off-by:
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Mark Bloch authored
Currently access to hardware stats buffer isn't protected, this can result in multiple writes and reads at the same time to the same memory location. This can lead to providing an incorrect value to the user. Add a mutex to protect against it. Fixes: b40f4757 ("IB/core: Make device counter infrastructure dynamic") Signed-off-by:
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Majd Dibbiny authored
In some firmware configuration, UMR usage from Virtual Functions is restricted. This information is published to the driver using new capability bits. Avoid using UMRs in these cases and use the Firmware slow-path flow to create mkeys and populate them with Virtual to Physical address translation. Older drivers that do not have this patch, will end up using memory keys that aren't populated with Virtual to Physical address translation that is done part of the UMR work. Reviewed-by:
Majd Dibbiny <majd@mellanox.com> Signed-off-by:
Laurence Oberman <loberman@redhat.com> Signed-off-by:
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Majd Dibbiny authored
When working with RC QPs, the FW sets the ECN capable bits for all the RoCE v2 packets. On the other hand, for UD QPs, the driver needs to set the the ECN capable bits in the Address Handler since the HW generates each packet according to the Address Handler and not the QP context. If ECN is not enabled in NIC or switch, these bits are ignored. Fixes: 2811ba51 ("IB/mlx5: Add RoCE fields to Address Vector") Reviewed-by:
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Matan Barak authored
The ioctl() UAPIs are meant to be used by both user-space and kernel ioctl() handlers. Mostly, these UAPI structs tend to consist of simple types, but sometimes user-space pointers may be passed between user-space and kernel. We would like to avoid dereferencing a user-space pointer in the kernel, thus - we always define RDMA_UAPI_PTR as a __aligned_u64 type. Fixes: 1f7ff9d5 ('IB/uverbs: Move to new headers and make naming consistent') Signed-off-by:
Matan Barak <matanb@mellanox.com> Signed-off-by:
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Jason Gunthorpe authored
The design of the uAPI had intended all structs to share the same layout on 32 and 64 bit compiles. Unfortunately over the years some errors have crept in. This series fixes all the incompatabilities. It goes along with a userspace rdma-core series that causes the providers to use these structs directly and then does various self-checks on the command formation. Those checks were combined with output from pahole on 32 and 64 bit compiles to confirm that the structure layouts are the same. This series does not make implicit padding explicit, as long as the implicit padding is the same on 32 and 64 bit compiles. Finally, the issue is put to rest by using __aligned_u64 in the uapi headers, if new code copies that type, and is checked in userspace, it is unlikely we will see problems in future. There are two patches that break the ABI for a 32 bit kernel, one for rxe and one for mlx4. Both patches have notes, but the overall feeling from Doug and I is that providing compat is just too difficult and not necessary since there is no real user of a 32 bit userspace and 32 bit kernel for various good reasons. The 32 bit userspace / 64 bit kernel case however does seem to have some real users and does need to work as designed. * 32compat: RDMA: Change all uapi headers to use __aligned_u64 instead of __u64 RDMA/rxe: Fix uABI structure layouts for 32/64 compat RDMA/mlx4: Fix uABI structure layouts for 32/64 compat RDMA/qedr: Fix uABI structure layouts for 32/64 compat RDMA/ucma: Fix uABI structure layouts for 32/64 compat RDMA: Remove minor pahole differences between 32/64
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Jason Gunthorpe authored
The new auditing standard for the subsystem will be to only use __aligned_64 in uapi headers to try and prevent 32/64 compat bugs from existing in the future. Changing all existing usage will help ensure new developers copy the right idea. The before/after of this patch was tested using pahole on 32 and 64 bit compiles to confirm it has no change in the structure layout, so this patch is a NOP. Signed-off-by: -
Jason Gunthorpe authored
With 32 bit compilation several of the fields become misaligned here. Fixing this is an ABI break for 32 bit rxe and it is in well used portions of the rxe ABI. To handle this we bump the ABI version, as expected. However the user space driver doesn't handle it properly today, so all existing user space continues to work. Updated userspace will start to require the necessary kernel version. We don't expect there to be any 32 bit users of rxe. Most likely cases, such as ARM 32 already generally don't work because rxe does not handle the CPU cache properly on its shared with userspace pages. Signed-off-by: -
Jason Gunthorpe authored
rss_caps in struct mlx4_uverbs_ex_query_device_resp is misaligned on 32 bit compared to 64 bit, add explicit padding. The rss caps were introduced recently and are very rarely used in user space, mainly for DPDK. We don't expect there to be a real 32 bit user, so this change is done without compat considerations. Fixes: 09d208b2 ("IB/mlx4: Add report for RSS capabilities by vendor channel") Signed-off-by:
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Jason Gunthorpe authored
struct qedr_alloc_ucontext_resp is a different length in 32 and 64 bit compiles due to implicit compiler padding. The structs alloc_pd_uresp, create_cq_uresp and create_qp_uresp are not padded by the compiler, but in user space the compiler pads them due to the way the core and driver structs are concatenated. Make this padding explicit and consistent for future sanity. The kernel driver can already handle the user buffer being smaller than required and copies correctly, so no compat or ABI break happens from introducing the explicit padding. Acked-by:
Michal Kalderon <michal.kalderon@cavium.com> Signed-off-by:
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Jason Gunthorpe authored
The rdma_ucm_event_resp is a different length on 32 and 64 bit compiles. The kernel requires it to be the expected length or longer so 32 bit builds running on a 64 bit kernel will not work. Retain full compat by having all kernels accept a struct with or without the trailing reserved field. Signed-off-by: -
Jason Gunthorpe authored
To help automatic detection we want pahole to report the same struct layouts for 32 and 64 bit compiles. These cases are all implicit padding added at the end of embedded structs as part of a union. The added reserved fields have no impact on the ABI. Signed-off-by:
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- 23 Mar, 2018 3 commits
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Jason Gunthorpe authored
The udata's for alloc_pd cannot contain u64s due to alignment constraints. Switch the two never-used u64's to arrays of u32 to reduce the required struct alignment to 4 bytes. These reserved fields are totally unnecessary, never written and never read. Signed-off-by: -
Steve Wise authored
This is useful to rdma ULPs. Signed-off-by:
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Parav Pandit authored
Currently CM request for RoCE follows following flow. rdma_create_id() rdma_resolve_addr() rdma_resolve_route() For RC QPs: rdma_connect() ->cma_connect_ib() ->ib_send_cm_req() ->cm_init_av_by_path() ->ib_init_ah_attr_from_path() For UD QPs: rdma_connect() ->cma_resolve_ib_udp() ->ib_send_cm_sidr_req() ->cm_init_av_by_path() ->ib_init_ah_attr_from_path() In both the flows, route is already resolved before sending CM requests. Therefore, code is refactored to avoid resolving route second time in ib_cm layer. ib_init_ah_attr_from_path() is extended to resolve route when it is not yet resolved for RoCE link layer. This is achieved by caller setting route_resolved field in path record whenever it has route already resolved. Signed-off-by:
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- 22 Mar, 2018 1 commit
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Parav Pandit authored
ib_query_gid() in commit [1] refers to RoCE GID table capability of the HCA using rdma_cap_roce_gid_table(). ib_core maintains the GID table cache regardless of the HCA provider drivers capability to maintain RoCE GID table. Therefore, whether to return a GID table entry from the software cache or from HCA should be done based on whether the port is RoCE or not. [1] commit 03db3a2d ("IB/core: Add RoCE GID table management") Reviewed-by:
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