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[IB] uverbs: Add device-specific ABI version attribute 

Add abi_version attribute to uverbs class devices to allow for
ABI versioning of device-specific interfaces.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Roland Dreier 2005-09-29 14:17:48 -07:00
parent eb9d3cd5ce
commit 274c089163
4 changed files with 20 additions and 0 deletions
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11
drivers/infiniband/core/uverbs_main.c
View File

@ -598,6 +598,15 @@ static ssize_t show_ibdev(struct class_device *class_dev, char *buf)
}
static CLASS_DEVICE_ATTR(ibdev, S_IRUGO, show_ibdev, NULL);
static ssize_t show_dev_abi_version(struct class_device *class_dev, char *buf)
{
struct ib_uverbs_device *dev =
container_of(class_dev, struct ib_uverbs_device, class_dev);
return sprintf(buf, "%d\n", dev->ib_dev->uverbs_abi_ver);
}
static CLASS_DEVICE_ATTR(abi_version, S_IRUGO, show_dev_abi_version, NULL);
static void ib_uverbs_release_class_dev(struct class_device *class_dev)
{
struct ib_uverbs_device *dev =
@ -662,6 +671,8 @@ static void ib_uverbs_add_one(struct ib_device *device)
if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_ibdev))
goto err_class;
if (class_device_create_file(&uverbs_dev->class_dev, &class_device_attr_abi_version))
goto err_class;
ib_set_client_data(device, &uverbs_client, uverbs_dev);

1
drivers/infiniband/hw/mthca/mthca_provider.c
View File

@ -1060,6 +1060,7 @@ int mthca_register_device(struct mthca_dev *dev)
strlcpy(dev->ib_dev.name, "mthca%d", IB_DEVICE_NAME_MAX);
dev->ib_dev.owner = THIS_MODULE;
dev->ib_dev.uverbs_abi_ver = MTHCA_UVERBS_ABI_VERSION;
dev->ib_dev.node_type = IB_NODE_CA;
dev->ib_dev.phys_port_cnt = dev->limits.num_ports;
dev->ib_dev.dma_device = &dev->pdev->dev;

6
drivers/infiniband/hw/mthca/mthca_user.h
View File

@ -37,6 +37,12 @@
#include <linux/types.h>
/*
* Increment this value if any changes that break userspace ABI
* compatibility are made.
*/
#define MTHCA_UVERBS_ABI_VERSION 1
/*
* Make sure that all structs defined in this file remain laid out so
* that they pack the same way on 32-bit and 64-bit architectures (to

2
include/rdma/ib_verbs.h
View File

@ -951,6 +951,8 @@ struct ib_device {
IB_DEV_UNREGISTERED
} reg_state;
int uverbs_abi_ver;
u8 node_type;
u8 phys_port_cnt;
};