diff options
| -rw-r--r-- | drivers/infiniband/core/uverbs_std_types.c | 40 | ||||
| -rw-r--r-- | include/rdma/uverbs_ioctl.h | 46 | ||||
| -rw-r--r-- | include/uapi/rdma/ib_user_ioctl_verbs.h | 10 |
3 files changed, 96 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c index 5f90978bda8d..db66c18857e4 100644 --- a/drivers/infiniband/core/uverbs_std_types.c +++ b/drivers/infiniband/core/uverbs_std_types.c @@ -209,6 +209,46 @@ static int uverbs_hot_unplug_completion_event_file(struct ib_uobject_file *uobj_ return 0; }; +/* + * This spec is used in order to pass information to the hardware driver in a + * legacy way. Every verb that could get driver specific data should get this + * spec. + */ +static const struct uverbs_attr_def uverbs_uhw_compat_in = + UVERBS_ATTR_PTR_IN_SZ(UVERBS_UHW_IN, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ)); +static const struct uverbs_attr_def uverbs_uhw_compat_out = + UVERBS_ATTR_PTR_OUT_SZ(UVERBS_UHW_OUT, 0, UA_FLAGS(UVERBS_ATTR_SPEC_F_MIN_SZ)); + +static void create_udata(struct uverbs_attr_bundle *ctx, + struct ib_udata *udata) +{ + /* + * This is for ease of conversion. The purpose is to convert all drivers + * to use uverbs_attr_bundle instead of ib_udata. + * Assume attr == 0 is input and attr == 1 is output. + */ + void __user *inbuf; + size_t inbuf_len = 0; + void __user *outbuf; + size_t outbuf_len = 0; + const struct uverbs_attr *uhw_in = + uverbs_attr_get(ctx, UVERBS_UHW_IN); + const struct uverbs_attr *uhw_out = + uverbs_attr_get(ctx, UVERBS_UHW_OUT); + + if (!IS_ERR(uhw_in)) { + inbuf = uhw_in->ptr_attr.ptr; + inbuf_len = uhw_in->ptr_attr.len; + } + + if (!IS_ERR(uhw_out)) { + outbuf = uhw_out->ptr_attr.ptr; + outbuf_len = uhw_out->ptr_attr.len; + } + + INIT_UDATA_BUF_OR_NULL(udata, inbuf, outbuf, inbuf_len, outbuf_len); +} + DECLARE_UVERBS_OBJECT(uverbs_object_comp_channel, UVERBS_OBJECT_COMP_CHANNEL, &UVERBS_TYPE_ALLOC_FD(0, diff --git a/include/rdma/uverbs_ioctl.h b/include/rdma/uverbs_ioctl.h index 9a8d217cdc1d..759afa0621ea 100644 --- a/include/rdma/uverbs_ioctl.h +++ b/include/rdma/uverbs_ioctl.h @@ -36,6 +36,7 @@ #include <rdma/uverbs_types.h> #include <linux/uaccess.h> #include <rdma/rdma_user_ioctl.h> +#include <rdma/ib_user_ioctl_verbs.h> /* * ======================================= @@ -338,6 +339,51 @@ static inline bool uverbs_attr_is_valid(const struct uverbs_attr_bundle *attrs_b idx & ~UVERBS_ID_NS_MASK); } +static inline const struct uverbs_attr *uverbs_attr_get(const struct uverbs_attr_bundle *attrs_bundle, + u16 idx) +{ + u16 idx_bucket = idx >> UVERBS_ID_NS_SHIFT; + + if (!uverbs_attr_is_valid(attrs_bundle, idx)) + return ERR_PTR(-ENOENT); + + return &attrs_bundle->hash[idx_bucket].attrs[idx & ~UVERBS_ID_NS_MASK]; +} + +static inline int uverbs_copy_to(const struct uverbs_attr_bundle *attrs_bundle, + size_t idx, const void *from) +{ + const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); + u16 flags; + + if (IS_ERR(attr)) + return PTR_ERR(attr); + + flags = attr->ptr_attr.flags | UVERBS_ATTR_F_VALID_OUTPUT; + return (!copy_to_user(attr->ptr_attr.ptr, from, attr->ptr_attr.len) && + !put_user(flags, &attr->uattr->flags)) ? 0 : -EFAULT; +} + +static inline int _uverbs_copy_from(void *to, size_t to_size, + const struct uverbs_attr_bundle *attrs_bundle, + size_t idx) +{ + const struct uverbs_attr *attr = uverbs_attr_get(attrs_bundle, idx); + + if (IS_ERR(attr)) + return PTR_ERR(attr); + + if (to_size <= sizeof(((struct ib_uverbs_attr *)0)->data)) + memcpy(to, &attr->ptr_attr.data, attr->ptr_attr.len); + else if (copy_from_user(to, attr->ptr_attr.ptr, attr->ptr_attr.len)) + return -EFAULT; + + return 0; +} + +#define uverbs_copy_from(to, attrs_bundle, idx) \ + _uverbs_copy_from(to, sizeof(*(to)), attrs_bundle, idx) + /* ================================================= * Definitions -> Specs infrastructure * ================================================= diff --git a/include/uapi/rdma/ib_user_ioctl_verbs.h b/include/uapi/rdma/ib_user_ioctl_verbs.h index 78a2e5be4d6e..90f81eeca35b 100644 --- a/include/uapi/rdma/ib_user_ioctl_verbs.h +++ b/include/uapi/rdma/ib_user_ioctl_verbs.h @@ -33,6 +33,11 @@ #ifndef IB_USER_IOCTL_VERBS_H #define IB_USER_IOCTL_VERBS_H +#include <rdma/rdma_user_ioctl.h> + +#define UVERBS_UDATA_DRIVER_DATA_NS 1 +#define UVERBS_UDATA_DRIVER_DATA_FLAG (1UL << UVERBS_ID_NS_SHIFT) + enum uverbs_default_objects { UVERBS_OBJECT_DEVICE, /* No instances of DEVICE are allowed */ UVERBS_OBJECT_PD, @@ -50,5 +55,10 @@ enum uverbs_default_objects { UVERBS_OBJECT_LAST, }; +enum { + UVERBS_UHW_IN = UVERBS_UDATA_DRIVER_DATA_FLAG, + UVERBS_UHW_OUT, +}; + #endif |