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| author | Jason Gunthorpe <jgg@mellanox.com> | 2019-06-14 02:38:18 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-06-19 04:41:05 +0200 |
| commit | 0e2d00eb6fd45f2a645f4874286bdc5b4b53782b (patch) | |
| tree | 09c593d14ba74de14aad426b428279a2814e654d /include/uapi/rdma | |
| parent | RDMA: Move rdma_node_type to uapi/ (diff) | |
| download | linux-0e2d00eb6fd45f2a645f4874286bdc5b4b53782b.tar.xz linux-0e2d00eb6fd45f2a645f4874286bdc5b4b53782b.zip | |
RDMA: Add NLDEV_GET_CHARDEV to allow char dev discovery and autoload
Allow userspace to issue a netlink query against the ib_device for
something like "uverbs" and get back the char dev name, inode major/minor,
and interface ABI information for "uverbs0".
Since we are now in netlink this can also trigger a module autoload to
make the uverbs device come into existence.
Largely this will let us replace searching and reading inside sysfs to
setup devices, and provides an alternative (using driver_id) to device
name based provider binding for things like rxe.
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Diffstat (limited to 'include/uapi/rdma')
| -rw-r--r-- | include/uapi/rdma/rdma_netlink.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/include/uapi/rdma/rdma_netlink.h b/include/uapi/rdma/rdma_netlink.h index f588e8551c6c..9903db21a42c 100644 --- a/include/uapi/rdma/rdma_netlink.h +++ b/include/uapi/rdma/rdma_netlink.h @@ -279,6 +279,8 @@ enum rdma_nldev_command { RDMA_NLDEV_CMD_RES_PD_GET, /* can dump */ + RDMA_NLDEV_CMD_GET_CHARDEV, + RDMA_NLDEV_NUM_OPS }; @@ -492,6 +494,18 @@ enum rdma_nldev_attr { RDMA_NLDEV_NET_NS_FD, /* u32 */ /* + * Information about a chardev. + * CHARDEV_TYPE is the name of the chardev ABI (ie uverbs, umad, etc) + * CHARDEV_ABI signals the ABI revision (historical) + * CHARDEV_NAME is the kernel name for the /dev/ file (no directory) + * CHARDEV is the 64 bit dev_t for the inode + */ + RDMA_NLDEV_ATTR_CHARDEV_TYPE, /* string */ + RDMA_NLDEV_ATTR_CHARDEV_NAME, /* string */ + RDMA_NLDEV_ATTR_CHARDEV_ABI, /* u64 */ + RDMA_NLDEV_ATTR_CHARDEV, /* u64 */ + + /* * Always the end */ RDMA_NLDEV_ATTR_MAX |