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RDMA/core: Introduce new GID table query API

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Introduce rdma_query_gid_table which enables querying all the GID tables
of a given device and copying the attributes of all valid GID entries to a
provided buffer.

This API provides a faster way to query a GID table using single call and
will be used in libibverbs to improve current approach that requires
multiple calls to open, close and read multiple sysfs files for a single
GID table entry.

Link: https://lore.kernel.org/r/20200923165015.2491894-4-leon@kernel.org
Signed-off-by: Avihai Horon <avihaih@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Avihai Horon
2020-10-01 21:20:11 -03:00
committed by Jason Gunthorpe
parent 1c15b4f2a4
commit c4b4d548fa
3 changed files with 74 additions and 3 deletions
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include/uapi/rdma/ib_user_ioctl_verbs.h
+8
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@@ -251,4 +251,12 @@ enum rdma_driver_id {
RDMA_DRIVER_SIW,
};
struct ib_uverbs_gid_entry {
__aligned_u64 gid[2];
__u32 gid_index;
__u32 port_num;
__u32 gid_type;
__u32 netdev_ifindex; /* It is 0 if there is no netdev associated with it */
};
#endif