From 4785860e04bc8d7e244b25257168e1cf8a5529ab Mon Sep 17 00:00:00 2001 From: Jason Gunthorpe Date: Fri, 30 Nov 2018 13:06:21 +0200 Subject: RDMA/uverbs: Implement an ioctl that can call write and write_ex handlers Now that the handlers do not process their own udata we can make a sensible ioctl that wrappers them. The ioctl follows the same format as the write_ex() and has the user explicitly specify the core and driver in/out opaque structures and a command number. This works for all forms of write commands. Signed-off-by: Jason Gunthorpe Signed-off-by: Leon Romanovsky Signed-off-by: Doug Ledford --- drivers/infiniband/core/Makefile | 2 +- drivers/infiniband/core/rdma_core.h | 5 ++ drivers/infiniband/core/uverbs.h | 1 - drivers/infiniband/core/uverbs_ioctl.c | 40 ++++++++------- drivers/infiniband/core/uverbs_std_types.c | 3 -- drivers/infiniband/core/uverbs_std_types_device.c | 60 +++++++++++++++++++++++ drivers/infiniband/core/uverbs_uapi.c | 1 + 7 files changed, 89 insertions(+), 23 deletions(-) create mode 100644 drivers/infiniband/core/uverbs_std_types_device.c (limited to 'drivers') diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile index 867cee5e27b2..69dee36e0e89 100644 --- a/drivers/infiniband/core/Makefile +++ b/drivers/infiniband/core/Makefile @@ -38,4 +38,4 @@ ib_uverbs-y := uverbs_main.o uverbs_cmd.o uverbs_marshall.o \ uverbs_std_types_cq.o \ uverbs_std_types_flow_action.o uverbs_std_types_dm.o \ uverbs_std_types_mr.o uverbs_std_types_counters.o \ - uverbs_uapi.o + uverbs_uapi.o uverbs_std_types_device.o diff --git a/drivers/infiniband/core/rdma_core.h b/drivers/infiniband/core/rdma_core.h index b3ca7457ac42..be6b8e1257d0 100644 --- a/drivers/infiniband/core/rdma_core.h +++ b/drivers/infiniband/core/rdma_core.h @@ -188,6 +188,7 @@ void uverbs_user_mmap_disassociate(struct ib_uverbs_file *ufile); extern const struct uapi_definition uverbs_def_obj_counters[]; extern const struct uapi_definition uverbs_def_obj_cq[]; +extern const struct uapi_definition uverbs_def_obj_device[]; extern const struct uapi_definition uverbs_def_obj_dm[]; extern const struct uapi_definition uverbs_def_obj_flow_action[]; extern const struct uapi_definition uverbs_def_obj_intf[]; @@ -214,4 +215,8 @@ uapi_get_method(const struct uverbs_api *uapi, u32 command) return uapi->write_methods[cmd_idx]; } +void uverbs_fill_udata(struct uverbs_attr_bundle *bundle, + struct ib_udata *udata, unsigned int attr_in, + unsigned int attr_out); + #endif /* RDMA_CORE_H */ diff --git a/drivers/infiniband/core/uverbs.h b/drivers/infiniband/core/uverbs.h index 8b41c95300c6..88029f3b6853 100644 --- a/drivers/infiniband/core/uverbs.h +++ b/drivers/infiniband/core/uverbs.h @@ -246,7 +246,6 @@ int uverbs_dealloc_mw(struct ib_mw *mw); void ib_uverbs_detach_umcast(struct ib_qp *qp, struct ib_uqp_object *uobj); -void create_udata(struct uverbs_attr_bundle *ctx, struct ib_udata *udata); long ib_uverbs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg); struct ib_uverbs_flow_spec { diff --git a/drivers/infiniband/core/uverbs_ioctl.c b/drivers/infiniband/core/uverbs_ioctl.c index e643a43dce8d..3cc46447240e 100644 --- a/drivers/infiniband/core/uverbs_ioctl.c +++ b/drivers/infiniband/core/uverbs_ioctl.c @@ -436,7 +436,9 @@ static int ib_uverbs_run_method(struct bundle_priv *pbundle, return -EINVAL; if (pbundle->method_elm->has_udata) - create_udata(&pbundle->bundle, &pbundle->bundle.driver_udata); + uverbs_fill_udata(&pbundle->bundle, + &pbundle->bundle.driver_udata, + UVERBS_ATTR_UHW_IN, UVERBS_ATTR_UHW_OUT); if (destroy_bkey != UVERBS_API_ATTR_BKEY_LEN) { struct uverbs_obj_attr *destroy_attr = @@ -664,35 +666,37 @@ int uverbs_get_flags32(u32 *to, const struct uverbs_attr_bundle *attrs_bundle, EXPORT_SYMBOL(uverbs_get_flags32); /* - * 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. + * Fill a ib_udata struct (core or uhw) using the given attribute IDs. + * This is primarily used to convert the UVERBS_ATTR_UHW() into the + * ib_udata format used by the drivers. */ -void create_udata(struct uverbs_attr_bundle *bundle, struct ib_udata *udata) +void uverbs_fill_udata(struct uverbs_attr_bundle *bundle, + struct ib_udata *udata, unsigned int attr_in, + unsigned int attr_out) { struct bundle_priv *pbundle = container_of(bundle, struct bundle_priv, bundle); - const struct uverbs_attr *uhw_in = - uverbs_attr_get(bundle, UVERBS_ATTR_UHW_IN); - const struct uverbs_attr *uhw_out = - uverbs_attr_get(bundle, UVERBS_ATTR_UHW_OUT); - - if (!IS_ERR(uhw_in)) { - udata->inlen = uhw_in->ptr_attr.len; - if (uverbs_attr_ptr_is_inline(uhw_in)) + const struct uverbs_attr *in = + uverbs_attr_get(&pbundle->bundle, attr_in); + const struct uverbs_attr *out = + uverbs_attr_get(&pbundle->bundle, attr_out); + + if (!IS_ERR(in)) { + udata->inlen = in->ptr_attr.len; + if (uverbs_attr_ptr_is_inline(in)) udata->inbuf = - &pbundle->user_attrs[uhw_in->ptr_attr.uattr_idx] + &pbundle->user_attrs[in->ptr_attr.uattr_idx] .data; else - udata->inbuf = u64_to_user_ptr(uhw_in->ptr_attr.data); + udata->inbuf = u64_to_user_ptr(in->ptr_attr.data); } else { udata->inbuf = NULL; udata->inlen = 0; } - if (!IS_ERR(uhw_out)) { - udata->outbuf = u64_to_user_ptr(uhw_out->ptr_attr.data); - udata->outlen = uhw_out->ptr_attr.len; + if (!IS_ERR(out)) { + udata->outbuf = u64_to_user_ptr(out->ptr_attr.data); + udata->outlen = out->ptr_attr.len; } else { udata->outbuf = NULL; udata->outlen = 0; diff --git a/drivers/infiniband/core/uverbs_std_types.c b/drivers/infiniband/core/uverbs_std_types.c index 424f325f8cba..e3df1e342e2f 100644 --- a/drivers/infiniband/core/uverbs_std_types.c +++ b/drivers/infiniband/core/uverbs_std_types.c @@ -259,10 +259,7 @@ DECLARE_UVERBS_NAMED_OBJECT( DECLARE_UVERBS_NAMED_OBJECT(UVERBS_OBJECT_PD, UVERBS_TYPE_ALLOC_IDR(uverbs_free_pd)); -DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE); - const struct uapi_definition uverbs_def_obj_intf[] = { - UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE), UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_PD, UAPI_DEF_OBJ_NEEDS_FN(dealloc_pd)), UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_COMP_CHANNEL, diff --git a/drivers/infiniband/core/uverbs_std_types_device.c b/drivers/infiniband/core/uverbs_std_types_device.c new file mode 100644 index 000000000000..aafb251b7d37 --- /dev/null +++ b/drivers/infiniband/core/uverbs_std_types_device.c @@ -0,0 +1,60 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* + * Copyright (c) 2018, Mellanox Technologies inc. All rights reserved. + */ + +#include +#include "rdma_core.h" +#include "uverbs.h" + +/* + * This ioctl method allows calling any defined write or write_ex + * handler. This essentially replaces the hdr/ex_hdr system with the ioctl + * marshalling, and brings the non-ex path into the same marshalling as the ex + * path. + */ +static int UVERBS_HANDLER(UVERBS_METHOD_INVOKE_WRITE)( + struct uverbs_attr_bundle *attrs) +{ + struct uverbs_api *uapi = attrs->ufile->device->uapi; + const struct uverbs_api_write_method *method_elm; + u32 cmd; + int rc; + + rc = uverbs_get_const(&cmd, attrs, UVERBS_ATTR_WRITE_CMD); + if (rc) + return rc; + + method_elm = uapi_get_method(uapi, cmd); + if (IS_ERR(method_elm)) + return PTR_ERR(method_elm); + + uverbs_fill_udata(attrs, &attrs->ucore, UVERBS_ATTR_CORE_IN, + UVERBS_ATTR_CORE_OUT); + + if (attrs->ucore.inlen < method_elm->req_size || + attrs->ucore.outlen < method_elm->resp_size) + return -ENOSPC; + + return method_elm->handler(attrs); +} + +DECLARE_UVERBS_NAMED_METHOD(UVERBS_METHOD_INVOKE_WRITE, + UVERBS_ATTR_CONST_IN(UVERBS_ATTR_WRITE_CMD, + enum ib_uverbs_write_cmds, + UA_MANDATORY), + UVERBS_ATTR_PTR_IN(UVERBS_ATTR_CORE_IN, + UVERBS_ATTR_MIN_SIZE(sizeof(u32)), + UA_OPTIONAL), + UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CORE_OUT, + UVERBS_ATTR_MIN_SIZE(0), + UA_OPTIONAL), + UVERBS_ATTR_UHW()); + +DECLARE_UVERBS_GLOBAL_METHODS(UVERBS_OBJECT_DEVICE, + &UVERBS_METHOD(UVERBS_METHOD_INVOKE_WRITE)); + +const struct uapi_definition uverbs_def_obj_device[] = { + UAPI_DEF_CHAIN_OBJ_TREE_NAMED(UVERBS_OBJECT_DEVICE), + {}, +}; diff --git a/drivers/infiniband/core/uverbs_uapi.c b/drivers/infiniband/core/uverbs_uapi.c index 830e48fe5e65..9ae08e4b78a3 100644 --- a/drivers/infiniband/core/uverbs_uapi.c +++ b/drivers/infiniband/core/uverbs_uapi.c @@ -621,6 +621,7 @@ void uverbs_destroy_api(struct uverbs_api *uapi) static const struct uapi_definition uverbs_core_api[] = { UAPI_DEF_CHAIN(uverbs_def_obj_counters), UAPI_DEF_CHAIN(uverbs_def_obj_cq), + UAPI_DEF_CHAIN(uverbs_def_obj_device), UAPI_DEF_CHAIN(uverbs_def_obj_dm), UAPI_DEF_CHAIN(uverbs_def_obj_flow_action), UAPI_DEF_CHAIN(uverbs_def_obj_intf), -- cgit v1.2.3-59-g8ed1b