diff options
Diffstat (limited to 'drivers/infiniband/core/uverbs_std_types_counters.c')
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types_counters.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types_counters.c b/drivers/infiniband/core/uverbs_std_types_counters.c index 4b6a985aad97..03b182a684a6 100644 --- a/drivers/infiniband/core/uverbs_std_types_counters.c +++ b/drivers/infiniband/core/uverbs_std_types_counters.c @@ -80,6 +80,49 @@ err_create_counters: return ret; } +static int UVERBS_HANDLER(UVERBS_METHOD_COUNTERS_READ)(struct ib_device *ib_dev, + struct ib_uverbs_file *file, + struct uverbs_attr_bundle *attrs) +{ + struct ib_counters_read_attr read_attr = {}; + const struct uverbs_attr *uattr; + struct ib_counters *counters = + uverbs_attr_get_obj(attrs, UVERBS_ATTR_READ_COUNTERS_HANDLE); + int ret; + + if (!ib_dev->read_counters) + return -EOPNOTSUPP; + + if (!atomic_read(&counters->usecnt)) + return -EINVAL; + + ret = uverbs_copy_from(&read_attr.flags, attrs, + UVERBS_ATTR_READ_COUNTERS_FLAGS); + if (ret) + return ret; + + uattr = uverbs_attr_get(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF); + read_attr.ncounters = uattr->ptr_attr.len / sizeof(u64); + read_attr.counters_buff = kcalloc(read_attr.ncounters, + sizeof(u64), GFP_KERNEL); + if (!read_attr.counters_buff) + return -ENOMEM; + + ret = ib_dev->read_counters(counters, + &read_attr, + attrs); + if (ret) + goto err_read; + + ret = uverbs_copy_to(attrs, UVERBS_ATTR_READ_COUNTERS_BUFF, + read_attr.counters_buff, + read_attr.ncounters * sizeof(u64)); + +err_read: + kfree(read_attr.counters_buff); + return ret; +} + static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_COUNTERS_CREATE, &UVERBS_ATTR_IDR(UVERBS_ATTR_CREATE_COUNTERS_HANDLE, UVERBS_OBJECT_COUNTERS, @@ -93,8 +136,22 @@ static DECLARE_UVERBS_NAMED_METHOD_WITH_HANDLER(UVERBS_METHOD_COUNTERS_DESTROY, UVERBS_ACCESS_DESTROY, UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); +#define MAX_COUNTERS_BUFF_SIZE USHRT_MAX +static DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_COUNTERS_READ, + &UVERBS_ATTR_IDR(UVERBS_ATTR_READ_COUNTERS_HANDLE, + UVERBS_OBJECT_COUNTERS, + UVERBS_ACCESS_READ, + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_READ_COUNTERS_BUFF, + UVERBS_ATTR_SIZE(0, MAX_COUNTERS_BUFF_SIZE), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY)), + &UVERBS_ATTR_PTR_IN(UVERBS_ATTR_READ_COUNTERS_FLAGS, + UVERBS_ATTR_TYPE(__u32), + UA_FLAGS(UVERBS_ATTR_SPEC_F_MANDATORY))); + DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_COUNTERS, &UVERBS_TYPE_ALLOC_IDR(0, uverbs_free_counters), &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_CREATE), - &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY)); + &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_DESTROY), + &UVERBS_METHOD(UVERBS_METHOD_COUNTERS_READ)); |