6.1-stable review patch. If anyone has any objections, please let me know.
------------------
From: Maher Sanalla msanalla@nvidia.com
[ Upstream commit 81f8f7454ad9e0bf95efdec6542afdc9a6ab1e24 ]
Currently, the IB uverbs API calls uobj_get_uobj_read(), which in turn uses the rdma_lookup_get_uobject() helper to retrieve user objects. In case of failure, uobj_get_uobj_read() returns NULL, overriding the error code from rdma_lookup_get_uobject(). The IB uverbs API then translates this NULL to -EINVAL, masking the actual error and complicating debugging. For example, applications calling ibv_modify_qp that fails with EBUSY when retrieving the QP uobject will see the overridden error code EINVAL instead, masking the actual error.
Furthermore, based on rdma-core commit: "2a22f1ced5f3 ("Merge pull request #1568 from jakemoroni/master")" Kernel's IB uverbs return values are either ignored and passed on as is to application or overridden with other errnos in a few cases.
Thus, to improve error reporting and debuggability, propagate the original error from rdma_lookup_get_uobject() instead of replacing it with EINVAL.
Signed-off-by: Maher Sanalla msanalla@nvidia.com Link: https://patch.msgid.link/64f9d3711b183984e939962c2f83383904f97dfb.1740577869... Signed-off-by: Leon Romanovsky leon@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/infiniband/core/uverbs_cmd.c | 144 ++++++++++++++------------- include/rdma/uverbs_std_types.h | 2 +- 2 files changed, 77 insertions(+), 69 deletions(-)
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index c6053e82ecf6f..33e2fe0facd52 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -718,8 +718,8 @@ static int ib_uverbs_reg_mr(struct uverbs_attr_bundle *attrs) goto err_free;
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); - if (!pd) { - ret = -EINVAL; + if (IS_ERR(pd)) { + ret = PTR_ERR(pd); goto err_free; }
@@ -809,8 +809,8 @@ static int ib_uverbs_rereg_mr(struct uverbs_attr_bundle *attrs) if (cmd.flags & IB_MR_REREG_PD) { new_pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); - if (!new_pd) { - ret = -EINVAL; + if (IS_ERR(new_pd)) { + ret = PTR_ERR(new_pd); goto put_uobjs; } } else { @@ -919,8 +919,8 @@ static int ib_uverbs_alloc_mw(struct uverbs_attr_bundle *attrs) return PTR_ERR(uobj);
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); - if (!pd) { - ret = -EINVAL; + if (IS_ERR(pd)) { + ret = PTR_ERR(pd); goto err_free; }
@@ -1127,8 +1127,8 @@ static int ib_uverbs_resize_cq(struct uverbs_attr_bundle *attrs) return ret;
cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); - if (!cq) - return -EINVAL; + if (IS_ERR(cq)) + return PTR_ERR(cq);
ret = cq->device->ops.resize_cq(cq, cmd.cqe, &attrs->driver_udata); if (ret) @@ -1189,8 +1189,8 @@ static int ib_uverbs_poll_cq(struct uverbs_attr_bundle *attrs) return ret;
cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); - if (!cq) - return -EINVAL; + if (IS_ERR(cq)) + return PTR_ERR(cq);
/* we copy a struct ib_uverbs_poll_cq_resp to user space */ header_ptr = attrs->ucore.outbuf; @@ -1238,8 +1238,8 @@ static int ib_uverbs_req_notify_cq(struct uverbs_attr_bundle *attrs) return ret;
cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); - if (!cq) - return -EINVAL; + if (IS_ERR(cq)) + return PTR_ERR(cq);
ib_req_notify_cq(cq, cmd.solicited_only ? IB_CQ_SOLICITED : IB_CQ_NEXT_COMP); @@ -1321,8 +1321,8 @@ static int create_qp(struct uverbs_attr_bundle *attrs, ind_tbl = uobj_get_obj_read(rwq_ind_table, UVERBS_OBJECT_RWQ_IND_TBL, cmd->rwq_ind_tbl_handle, attrs); - if (!ind_tbl) { - ret = -EINVAL; + if (IS_ERR(ind_tbl)) { + ret = PTR_ERR(ind_tbl); goto err_put; }
@@ -1360,8 +1360,10 @@ static int create_qp(struct uverbs_attr_bundle *attrs, if (cmd->is_srq) { srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd->srq_handle, attrs); - if (!srq || srq->srq_type == IB_SRQT_XRC) { - ret = -EINVAL; + if (IS_ERR(srq) || + srq->srq_type == IB_SRQT_XRC) { + ret = IS_ERR(srq) ? PTR_ERR(srq) : + -EINVAL; goto err_put; } } @@ -1371,23 +1373,29 @@ static int create_qp(struct uverbs_attr_bundle *attrs, rcq = uobj_get_obj_read( cq, UVERBS_OBJECT_CQ, cmd->recv_cq_handle, attrs); - if (!rcq) { - ret = -EINVAL; + if (IS_ERR(rcq)) { + ret = PTR_ERR(rcq); goto err_put; } } } }
- if (has_sq) + if (has_sq) { scq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->send_cq_handle, attrs); + if (IS_ERR(scq)) { + ret = PTR_ERR(scq); + goto err_put; + } + } + if (!ind_tbl && cmd->qp_type != IB_QPT_XRC_INI) rcq = rcq ?: scq; pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); - if (!pd || (!scq && has_sq)) { - ret = -EINVAL; + if (IS_ERR(pd)) { + ret = PTR_ERR(pd); goto err_put; }
@@ -1482,18 +1490,18 @@ static int create_qp(struct uverbs_attr_bundle *attrs, err_put: if (!IS_ERR(xrcd_uobj)) uobj_put_read(xrcd_uobj); - if (pd) + if (!IS_ERR_OR_NULL(pd)) uobj_put_obj_read(pd); - if (scq) + if (!IS_ERR_OR_NULL(scq)) rdma_lookup_put_uobject(&scq->uobject->uevent.uobject, UVERBS_LOOKUP_READ); - if (rcq && rcq != scq) + if (!IS_ERR_OR_NULL(rcq) && rcq != scq) rdma_lookup_put_uobject(&rcq->uobject->uevent.uobject, UVERBS_LOOKUP_READ); - if (srq) + if (!IS_ERR_OR_NULL(srq)) rdma_lookup_put_uobject(&srq->uobject->uevent.uobject, UVERBS_LOOKUP_READ); - if (ind_tbl) + if (!IS_ERR_OR_NULL(ind_tbl)) uobj_put_obj_read(ind_tbl);
uobj_alloc_abort(&obj->uevent.uobject, attrs); @@ -1655,8 +1663,8 @@ static int ib_uverbs_query_qp(struct uverbs_attr_bundle *attrs) }
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) { - ret = -EINVAL; + if (IS_ERR(qp)) { + ret = PTR_ERR(qp); goto out; }
@@ -1761,8 +1769,8 @@ static int modify_qp(struct uverbs_attr_bundle *attrs,
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd->base.qp_handle, attrs); - if (!qp) { - ret = -EINVAL; + if (IS_ERR(qp)) { + ret = PTR_ERR(qp); goto out; }
@@ -2027,8 +2035,8 @@ static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs) return -ENOMEM;
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) { - ret = -EINVAL; + if (IS_ERR(qp)) { + ret = PTR_ERR(qp); goto out; }
@@ -2065,9 +2073,9 @@ static int ib_uverbs_post_send(struct uverbs_attr_bundle *attrs)
ud->ah = uobj_get_obj_read(ah, UVERBS_OBJECT_AH, user_wr->wr.ud.ah, attrs); - if (!ud->ah) { + if (IS_ERR(ud->ah)) { + ret = PTR_ERR(ud->ah); kfree(ud); - ret = -EINVAL; goto out_put; } ud->remote_qpn = user_wr->wr.ud.remote_qpn; @@ -2304,8 +2312,8 @@ static int ib_uverbs_post_recv(struct uverbs_attr_bundle *attrs) return PTR_ERR(wr);
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) { - ret = -EINVAL; + if (IS_ERR(qp)) { + ret = PTR_ERR(qp); goto out; }
@@ -2355,8 +2363,8 @@ static int ib_uverbs_post_srq_recv(struct uverbs_attr_bundle *attrs) return PTR_ERR(wr);
srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); - if (!srq) { - ret = -EINVAL; + if (IS_ERR(srq)) { + ret = PTR_ERR(srq); goto out; }
@@ -2412,8 +2420,8 @@ static int ib_uverbs_create_ah(struct uverbs_attr_bundle *attrs) }
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); - if (!pd) { - ret = -EINVAL; + if (IS_ERR(pd)) { + ret = PTR_ERR(pd); goto err; }
@@ -2482,8 +2490,8 @@ static int ib_uverbs_attach_mcast(struct uverbs_attr_bundle *attrs) return ret;
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) - return -EINVAL; + if (IS_ERR(qp)) + return PTR_ERR(qp);
obj = qp->uobject;
@@ -2532,8 +2540,8 @@ static int ib_uverbs_detach_mcast(struct uverbs_attr_bundle *attrs) return ret;
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) - return -EINVAL; + if (IS_ERR(qp)) + return PTR_ERR(qp);
obj = qp->uobject; mutex_lock(&obj->mcast_lock); @@ -2667,8 +2675,8 @@ static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, UVERBS_OBJECT_FLOW_ACTION, kern_spec->action.handle, attrs); - if (!ib_spec->action.act) - return -EINVAL; + if (IS_ERR(ib_spec->action.act)) + return PTR_ERR(ib_spec->action.act); ib_spec->action.size = sizeof(struct ib_flow_spec_action_handle); flow_resources_add(uflow_res, @@ -2685,8 +2693,8 @@ static int kern_spec_to_ib_spec_action(struct uverbs_attr_bundle *attrs, UVERBS_OBJECT_COUNTERS, kern_spec->flow_count.handle, attrs); - if (!ib_spec->flow_count.counters) - return -EINVAL; + if (IS_ERR(ib_spec->flow_count.counters)) + return PTR_ERR(ib_spec->flow_count.counters); ib_spec->flow_count.size = sizeof(struct ib_flow_spec_action_count); flow_resources_add(uflow_res, @@ -2904,14 +2912,14 @@ static int ib_uverbs_ex_create_wq(struct uverbs_attr_bundle *attrs) return PTR_ERR(obj);
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd.pd_handle, attrs); - if (!pd) { - err = -EINVAL; + if (IS_ERR(pd)) { + err = PTR_ERR(pd); goto err_uobj; }
cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); - if (!cq) { - err = -EINVAL; + if (IS_ERR(cq)) { + err = PTR_ERR(cq); goto err_put_pd; }
@@ -3012,8 +3020,8 @@ static int ib_uverbs_ex_modify_wq(struct uverbs_attr_bundle *attrs) return -EINVAL;
wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, cmd.wq_handle, attrs); - if (!wq) - return -EINVAL; + if (IS_ERR(wq)) + return PTR_ERR(wq);
if (cmd.attr_mask & IB_WQ_FLAGS) { wq_attr.flags = cmd.flags; @@ -3096,8 +3104,8 @@ static int ib_uverbs_ex_create_rwq_ind_table(struct uverbs_attr_bundle *attrs) num_read_wqs++) { wq = uobj_get_obj_read(wq, UVERBS_OBJECT_WQ, wqs_handles[num_read_wqs], attrs); - if (!wq) { - err = -EINVAL; + if (IS_ERR(wq)) { + err = PTR_ERR(wq); goto put_wqs; }
@@ -3252,8 +3260,8 @@ static int ib_uverbs_ex_create_flow(struct uverbs_attr_bundle *attrs) }
qp = uobj_get_obj_read(qp, UVERBS_OBJECT_QP, cmd.qp_handle, attrs); - if (!qp) { - err = -EINVAL; + if (IS_ERR(qp)) { + err = PTR_ERR(qp); goto err_uobj; }
@@ -3399,15 +3407,15 @@ static int __uverbs_create_xsrq(struct uverbs_attr_bundle *attrs, if (ib_srq_has_cq(cmd->srq_type)) { attr.ext.cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd->cq_handle, attrs); - if (!attr.ext.cq) { - ret = -EINVAL; + if (IS_ERR(attr.ext.cq)) { + ret = PTR_ERR(attr.ext.cq); goto err_put_xrcd; } }
pd = uobj_get_obj_read(pd, UVERBS_OBJECT_PD, cmd->pd_handle, attrs); - if (!pd) { - ret = -EINVAL; + if (IS_ERR(pd)) { + ret = PTR_ERR(pd); goto err_put_cq; }
@@ -3514,8 +3522,8 @@ static int ib_uverbs_modify_srq(struct uverbs_attr_bundle *attrs) return ret;
srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); - if (!srq) - return -EINVAL; + if (IS_ERR(srq)) + return PTR_ERR(srq);
attr.max_wr = cmd.max_wr; attr.srq_limit = cmd.srq_limit; @@ -3542,8 +3550,8 @@ static int ib_uverbs_query_srq(struct uverbs_attr_bundle *attrs) return ret;
srq = uobj_get_obj_read(srq, UVERBS_OBJECT_SRQ, cmd.srq_handle, attrs); - if (!srq) - return -EINVAL; + if (IS_ERR(srq)) + return PTR_ERR(srq);
ret = ib_query_srq(srq, &attr);
@@ -3668,8 +3676,8 @@ static int ib_uverbs_ex_modify_cq(struct uverbs_attr_bundle *attrs) return -EOPNOTSUPP;
cq = uobj_get_obj_read(cq, UVERBS_OBJECT_CQ, cmd.cq_handle, attrs); - if (!cq) - return -EINVAL; + if (IS_ERR(cq)) + return PTR_ERR(cq);
ret = rdma_set_cq_moderation(cq, cmd.attr.cq_count, cmd.attr.cq_period);
diff --git a/include/rdma/uverbs_std_types.h b/include/rdma/uverbs_std_types.h index fe05121169589..555ea3d142a46 100644 --- a/include/rdma/uverbs_std_types.h +++ b/include/rdma/uverbs_std_types.h @@ -34,7 +34,7 @@ static inline void *_uobj_get_obj_read(struct ib_uobject *uobj) { if (IS_ERR(uobj)) - return NULL; + return ERR_CAST(uobj); return uobj->object; } #define uobj_get_obj_read(_object, _type, _id, _attrs) \