[PATCHv7 2/3] IB/core: added support to use rdma cgroup controller

From: Parav Pandit
Date: Sun Feb 28 2016 - 09:15:34 EST

Added support APIs for IB core to register/unregister every IB/RDMA
device with rdma cgroup for tracking verbs and hw resources.
IB core registers with rdma cgroup controller and also defines
resources that can be accounted.
Added support APIs for uverbs layer to make use of rdma controller.
Added uverbs layer to perform resource charge/uncharge functionality.
Added support during query_device uverb operation to ensure it
returns resource limits by honoring rdma cgroup configured limits.

Signed-off-by: Parav Pandit <pandit.parav@xxxxxxxxx>
---
drivers/infiniband/core/Makefile | 1 +
drivers/infiniband/core/cgroup.c | 111 +++++++++++++++++++++++++++
drivers/infiniband/core/core_priv.h | 43 +++++++++++
drivers/infiniband/core/device.c | 23 ++++--
drivers/infiniband/core/uverbs_cmd.c | 137 ++++++++++++++++++++++++++++++----
drivers/infiniband/core/uverbs_main.c | 19 +++++
include/rdma/ib_verbs.h | 29 +++++++
7 files changed, 342 insertions(+), 21 deletions(-)
create mode 100644 drivers/infiniband/core/cgroup.c

diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile
index f818538..60d9e44 100644
--- a/drivers/infiniband/core/Makefile
+++ b/drivers/infiniband/core/Makefile
@@ -13,6 +13,7 @@ ib_core-y := packer.o ud_header.o verbs.o cq.o sysfs.o \
roce_gid_mgmt.o
ib_core-$(CONFIG_INFINIBAND_USER_MEM) += umem.o
ib_core-$(CONFIG_INFINIBAND_ON_DEMAND_PAGING) += umem_odp.o umem_rbtree.o
+ib_core-$(CONFIG_CGROUP_RDMA) += cgroup.o

ib_mad-y := mad.o smi.o agent.o mad_rmpp.o

diff --git a/drivers/infiniband/core/cgroup.c b/drivers/infiniband/core/cgroup.c
new file mode 100644
index 0000000..6813b87
--- /dev/null
+++ b/drivers/infiniband/core/cgroup.c
@@ -0,0 +1,111 @@
+/*
+ * This software is available to you under a choice of one of two
+ * licenses. You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ * Redistribution and use in source and binary forms, with or
+ * without modification, are permitted provided that the following
+ * conditions are met:
+ *
+ * - Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimer in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <linux/kernel.h>
+#include <linux/cgroup_rdma.h>
+#include <linux/parser.h>
+
+#include "core_priv.h"
+
+/**
+ * resource table definition as to be seen by the user.
+ * Need to add entries to it when more resources are
+ * added/defined at IB verb/core layer.
+ */
+static char const *resource_tokens[] = {
+ [RDMA_VERB_RESOURCE_UCTX] = "uctx",
+ [RDMA_VERB_RESOURCE_AH] = "ah",
+ [RDMA_VERB_RESOURCE_PD] = "pd",
+ [RDMA_VERB_RESOURCE_CQ] = "cq",
+ [RDMA_VERB_RESOURCE_MR] = "mr",
+ [RDMA_VERB_RESOURCE_MW] = "mw",
+ [RDMA_VERB_RESOURCE_SRQ] = "srq",
+ [RDMA_VERB_RESOURCE_QP] = "qp",
+ [RDMA_VERB_RESOURCE_FLOW] = "flow",
+};
+
+/**
+ * ib_device_register_rdmacg - register with rdma cgroup.
+ * @device: device to register to participate in resource
+ * accounting by rdma cgroup.
+ *
+ * Register with the rdma cgroup. Should be called before
+ * exposing rdma device to user space applications to avoid
+ * resource accounting leak.
+ * HCA drivers should set resource pool ops first if they wish
+ * to support hw specific resource accounting before IB core
+ * registers with rdma cgroup.
+ * Returns 0 on success or otherwise failure code.
+ */
+int ib_device_register_rdmacg(struct ib_device *device)
+{
+ device->cg_device.name = device->name;
+ device->cg_device.pool_info.resource_name_table = resource_tokens;
+ device->cg_device.pool_info.table_len = ARRAY_SIZE(resource_tokens);
+ return rdmacg_register_device(&device->cg_device);
+}
+
+/**
+ * ib_device_unregister_rdmacg - unregister with rdma cgroup.
+ * @device: device to unregister.
+ *
+ * Unregister with the rdma cgroup. Should be called after
+ * all the resources are deallocated, and after a stage when any
+ * other resource allocation of user application cannot be done
+ * for this device to avoid any leak in accounting.
+ */
+void ib_device_unregister_rdmacg(struct ib_device *device)
+{
+ rdmacg_unregister_device(&device->cg_device);
+}
+
+int ib_rdmacg_try_charge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num)
+{
+ return rdmacg_try_charge(&cg_obj->cg, &device->cg_device,
+ resource_index, num);
+}
+EXPORT_SYMBOL(ib_rdmacg_try_charge);
+
+void ib_rdmacg_uncharge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num)
+{
+ rdmacg_uncharge(cg_obj->cg, &device->cg_device,
+ resource_index, num);
+}
+EXPORT_SYMBOL(ib_rdmacg_uncharge);
+
+void ib_rdmacg_query_limit(struct ib_device *device, int *limits, int max_count)
+{
+ rdmacg_query_limit(&device->cg_device, limits);
+}
+EXPORT_SYMBOL(ib_rdmacg_query_limit);
diff --git a/drivers/infiniband/core/core_priv.h b/drivers/infiniband/core/core_priv.h
index eab3221..ad61d7d9 100644
--- a/drivers/infiniband/core/core_priv.h
+++ b/drivers/infiniband/core/core_priv.h
@@ -124,6 +124,49 @@ int ib_cache_setup_one(struct ib_device *device);
void ib_cache_cleanup_one(struct ib_device *device);
void ib_cache_release_one(struct ib_device *device);

+#ifdef CONFIG_CGROUP_RDMA
+
+int ib_device_register_rdmacg(struct ib_device *device);
+void ib_device_unregister_rdmacg(struct ib_device *device);
+
+int ib_rdmacg_try_charge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num);
+
+void ib_rdmacg_uncharge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num);
+
+void ib_rdmacg_query_limit(struct ib_device *device,
+ int *limits, int max_count);
+#else
+
+static inline int ib_device_register_rdmacg(struct ib_device *device)
+{ return 0; }
+
+static inline void ib_device_unregister_rdmacg(struct ib_device *device)
+{ }
+
+static inline int ib_rdmacg_try_charge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num)
+{ return 0; }
+
+static inline void ib_rdmacg_uncharge(struct ib_rdmacg_object *cg_obj,
+ struct ib_device *device,
+ int resource_index, int num)
+{ }
+
+static inline void ib_rdmacg_query_limit(struct ib_device *device,
+ int *limits, int max_count)
+{
+ int i;
+
+ for (i = 0; i < max_count; i++)
+ limits[i] = S32_MAX;
+}
+#endif
+
static inline bool rdma_is_upper_dev_rcu(struct net_device *dev,
struct net_device *upper)
{
diff --git a/drivers/infiniband/core/device.c b/drivers/infiniband/core/device.c
index 00da80e..54ea8ce 100644
--- a/drivers/infiniband/core/device.c
+++ b/drivers/infiniband/core/device.c
@@ -343,28 +343,38 @@ int ib_register_device(struct ib_device *device,

ret = read_port_immutable(device);
if (ret) {
- printk(KERN_WARNING "Couldn't create per port immutable data %s\n",
- device->name);
+ pr_warn("Couldn't create per port immutable data %s\n",
+ device->name);
goto out;
}

ret = ib_cache_setup_one(device);
if (ret) {
- printk(KERN_WARNING "Couldn't set up InfiniBand P_Key/GID cache\n");
+ pr_warn("Couldn't set up InfiniBand P_Key/GID cache\n");
+ goto out;
+ }
+
+ ret = ib_device_register_rdmacg(device);
+ if (ret) {
+ pr_warn("Couldn't register device with rdma cgroup\n");
+ ib_cache_cleanup_one(device);
goto out;
}

memset(&device->attrs, 0, sizeof(device->attrs));
ret = device->query_device(device, &device->attrs, &uhw);
if (ret) {
- printk(KERN_WARNING "Couldn't query the device attributes\n");
+ pr_warn("Couldn't query the device attributes\n");
+ ib_device_unregister_rdmacg(device);
+ ib_cache_cleanup_one(device);
goto out;
}

ret = ib_device_register_sysfs(device, port_callback);
if (ret) {
- printk(KERN_WARNING "Couldn't register device %s with driver model\n",
- device->name);
+ pr_warn("Couldn't register device %s with driver model\n",
+ device->name);
+ ib_device_unregister_rdmacg(device);
ib_cache_cleanup_one(device);
goto out;
}
@@ -414,6 +424,7 @@ void ib_unregister_device(struct ib_device *device)

mutex_unlock(&device_mutex);

+ ib_device_unregister_rdmacg(device);
ib_device_unregister_sysfs(device);
ib_cache_cleanup_one(device);

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 6ffc9c4..0608be2 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -293,6 +293,7 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
struct ib_udata udata;
struct ib_ucontext *ucontext;
struct file *filp;
+ struct ib_rdmacg_object cg_obj;
int ret;

if (out_len < sizeof resp)
@@ -312,13 +313,19 @@ ssize_t ib_uverbs_get_context(struct ib_uverbs_file *file,
(unsigned long) cmd.response + sizeof resp,
in_len - sizeof cmd, out_len - sizeof resp);

+ ret = ib_rdmacg_try_charge(&cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_UCTX, 1);
+ if (ret)
+ goto err;
+
ucontext = ib_dev->alloc_ucontext(ib_dev, &udata);
if (IS_ERR(ucontext)) {
ret = PTR_ERR(ucontext);
- goto err;
+ goto err_alloc;
}

ucontext->device = ib_dev;
+ ucontext->cg_obj = cg_obj;
INIT_LIST_HEAD(&ucontext->pd_list);
INIT_LIST_HEAD(&ucontext->mr_list);
INIT_LIST_HEAD(&ucontext->mw_list);
@@ -382,6 +389,9 @@ err_free:
put_pid(ucontext->tgid);
ib_dev->dealloc_ucontext(ucontext);

+err_alloc:
+ ib_rdmacg_uncharge(&cg_obj, ib_dev, RDMA_VERB_RESOURCE_UCTX, 1);
+
err:
mutex_unlock(&file->mutex);
return ret;
@@ -390,7 +400,8 @@ err:
static void copy_query_dev_fields(struct ib_uverbs_file *file,
struct ib_device *ib_dev,
struct ib_uverbs_query_device_resp *resp,
- struct ib_device_attr *attr)
+ struct ib_device_attr *attr,
+ int *limits)
{
resp->fw_ver = attr->fw_ver;
resp->node_guid = ib_dev->node_guid;
@@ -400,15 +411,19 @@ static void copy_query_dev_fields(struct ib_uverbs_file *file,
resp->vendor_id = attr->vendor_id;
resp->vendor_part_id = attr->vendor_part_id;
resp->hw_ver = attr->hw_ver;
- resp->max_qp = attr->max_qp;
+ resp->max_qp = min_t(int, attr->max_qp,
+ limits[RDMA_VERB_RESOURCE_QP]);
resp->max_qp_wr = attr->max_qp_wr;
resp->device_cap_flags = attr->device_cap_flags;
resp->max_sge = attr->max_sge;
resp->max_sge_rd = attr->max_sge_rd;
- resp->max_cq = attr->max_cq;
+ resp->max_cq = min_t(int, attr->max_cq,
+ limits[RDMA_VERB_RESOURCE_CQ]);
resp->max_cqe = attr->max_cqe;
- resp->max_mr = attr->max_mr;
- resp->max_pd = attr->max_pd;
+ resp->max_mr = min_t(int, attr->max_mr,
+ limits[RDMA_VERB_RESOURCE_MR]);
+ resp->max_pd = min_t(int, attr->max_pd,
+ limits[RDMA_VERB_RESOURCE_PD]);
resp->max_qp_rd_atom = attr->max_qp_rd_atom;
resp->max_ee_rd_atom = attr->max_ee_rd_atom;
resp->max_res_rd_atom = attr->max_res_rd_atom;
@@ -417,16 +432,19 @@ static void copy_query_dev_fields(struct ib_uverbs_file *file,
resp->atomic_cap = attr->atomic_cap;
resp->max_ee = attr->max_ee;
resp->max_rdd = attr->max_rdd;
- resp->max_mw = attr->max_mw;
+ resp->max_mw = min_t(int, attr->max_mw,
+ limits[RDMA_VERB_RESOURCE_MW]);
resp->max_raw_ipv6_qp = attr->max_raw_ipv6_qp;
resp->max_raw_ethy_qp = attr->max_raw_ethy_qp;
resp->max_mcast_grp = attr->max_mcast_grp;
resp->max_mcast_qp_attach = attr->max_mcast_qp_attach;
resp->max_total_mcast_qp_attach = attr->max_total_mcast_qp_attach;
- resp->max_ah = attr->max_ah;
+ resp->max_ah = min_t(int, attr->max_ah,
+ limits[RDMA_VERB_RESOURCE_AH]);
resp->max_fmr = attr->max_fmr;
resp->max_map_per_fmr = attr->max_map_per_fmr;
- resp->max_srq = attr->max_srq;
+ resp->max_srq = min_t(int, attr->max_srq,
+ limits[RDMA_VERB_RESOURCE_SRQ]);
resp->max_srq_wr = attr->max_srq_wr;
resp->max_srq_sge = attr->max_srq_sge;
resp->max_pkeys = attr->max_pkeys;
@@ -441,6 +459,7 @@ ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
{
struct ib_uverbs_query_device cmd;
struct ib_uverbs_query_device_resp resp;
+ int limits[RDMA_RESOURCE_MAX];

if (out_len < sizeof resp)
return -ENOSPC;
@@ -448,8 +467,10 @@ ssize_t ib_uverbs_query_device(struct ib_uverbs_file *file,
if (copy_from_user(&cmd, buf, sizeof cmd))
return -EFAULT;

+ ib_rdmacg_query_limit(ib_dev, limits, RDMA_RESOURCE_MAX);
+
memset(&resp, 0, sizeof resp);
- copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs);
+ copy_query_dev_fields(file, ib_dev, &resp, &ib_dev->attrs, limits);

if (copy_to_user((void __user *) (unsigned long) cmd.response,
&resp, sizeof resp))
@@ -535,6 +556,13 @@ ssize_t ib_uverbs_alloc_pd(struct ib_uverbs_file *file,
if (!uobj)
return -ENOMEM;

+ ret = ib_rdmacg_try_charge(&uobj->cg_obj, file->device->ib_dev,
+ RDMA_VERB_RESOURCE_PD, 1);
+ if (ret) {
+ kfree(uobj);
+ return -EPERM;
+ }
+
init_uobj(uobj, 0, file->ucontext, &pd_lock_class);
down_write(&uobj->mutex);

@@ -580,6 +608,7 @@ err_idr:
ib_dealloc_pd(pd);

err:
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_PD, 1);
put_uobj_write(uobj);
return ret;
}
@@ -612,6 +641,8 @@ ssize_t ib_uverbs_dealloc_pd(struct ib_uverbs_file *file,
if (ret)
goto err_put;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_PD, 1);
+
uobj->live = 0;
put_uobj_write(uobj);

@@ -982,6 +1013,11 @@ ssize_t ib_uverbs_reg_mr(struct ib_uverbs_file *file,
}
}

+ ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_MR, 1);
+ if (ret)
+ goto err_charge;
+
mr = pd->device->reg_user_mr(pd, cmd.start, cmd.length, cmd.hca_va,
cmd.access_flags, &udata);
if (IS_ERR(mr)) {
@@ -1029,6 +1065,9 @@ err_unreg:
ib_dereg_mr(mr);

err_put:
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_MR, 1);
+
+err_charge:
put_pd_read(pd);

err_free:
@@ -1153,6 +1192,8 @@ ssize_t ib_uverbs_dereg_mr(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_MR, 1);
+
idr_remove_uobj(&ib_uverbs_mr_idr, uobj);

mutex_lock(&file->mutex);
@@ -1195,6 +1236,11 @@ ssize_t ib_uverbs_alloc_mw(struct ib_uverbs_file *file,
goto err_free;
}

+ ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_MW, 1);
+ if (ret)
+ goto err_charge;
+
mw = pd->device->alloc_mw(pd, cmd.mw_type);
if (IS_ERR(mw)) {
ret = PTR_ERR(mw);
@@ -1240,6 +1286,9 @@ err_unalloc:
uverbs_dealloc_mw(mw);

err_put:
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_MW, 1);
+
+err_charge:
put_pd_read(pd);

err_free:
@@ -1275,6 +1324,8 @@ ssize_t ib_uverbs_dealloc_mw(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_MW, 1);
+
idr_remove_uobj(&ib_uverbs_mw_idr, uobj);

mutex_lock(&file->mutex);
@@ -1374,6 +1425,11 @@ static struct ib_ucq_object *create_cq(struct ib_uverbs_file *file,
if (cmd_sz > offsetof(typeof(*cmd), flags) + sizeof(cmd->flags))
attr.flags = cmd->flags;

+ ret = ib_rdmacg_try_charge(&obj->uobject.cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_CQ, 1);
+ if (ret)
+ goto err_charge;
+
cq = ib_dev->create_cq(ib_dev, &attr,
file->ucontext, uhw);
if (IS_ERR(cq)) {
@@ -1421,6 +1477,10 @@ err_free:
ib_destroy_cq(cq);

err_file:
+ ib_rdmacg_uncharge(&obj->uobject.cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_CQ, 1);
+
+err_charge:
if (ev_file)
ib_uverbs_release_ucq(file, ev_file, obj);

@@ -1701,6 +1761,8 @@ ssize_t ib_uverbs_destroy_cq(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_CQ, 1);
+
idr_remove_uobj(&ib_uverbs_cq_idr, uobj);

mutex_lock(&file->mutex);
@@ -1840,6 +1902,12 @@ static int create_qp(struct ib_uverbs_file *file,
goto err_put;
}

+ ret = ib_rdmacg_try_charge(&obj->uevent.uobject.cg_obj,
+ file->device->ib_dev,
+ RDMA_VERB_RESOURCE_QP, 1);
+ if (ret)
+ goto err_put;
+
if (cmd->qp_type == IB_QPT_XRC_TGT)
qp = ib_create_qp(pd, &attr);
else
@@ -1847,7 +1915,7 @@ static int create_qp(struct ib_uverbs_file *file,

if (IS_ERR(qp)) {
ret = PTR_ERR(qp);
- goto err_put;
+ goto err_create;
}

if (cmd->qp_type != IB_QPT_XRC_TGT) {
@@ -1922,6 +1990,10 @@ err_cb:
err_destroy:
ib_destroy_qp(qp);

+err_create:
+ ib_rdmacg_uncharge(&obj->uevent.uobject.cg_obj, device,
+ RDMA_VERB_RESOURCE_QP, 1);
+
err_put:
if (xrcd)
put_xrcd_read(xrcd_uobj);
@@ -2389,6 +2461,8 @@ ssize_t ib_uverbs_destroy_qp(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_QP, 1);
+
if (obj->uxrcd)
atomic_dec(&obj->uxrcd->refcnt);

@@ -2835,10 +2909,15 @@ ssize_t ib_uverbs_create_ah(struct ib_uverbs_file *file,
memset(&attr.dmac, 0, sizeof(attr.dmac));
memcpy(attr.grh.dgid.raw, cmd.attr.grh.dgid, 16);

+ ret = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_AH, 1);
+ if (ret)
+ goto err_put;
+
ah = ib_create_ah(pd, &attr);
if (IS_ERR(ah)) {
ret = PTR_ERR(ah);
- goto err_put;
+ goto err_create;
}

ah->uobject = uobj;
@@ -2874,6 +2953,9 @@ err_copy:
err_destroy:
ib_destroy_ah(ah);

+err_create:
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_AH, 1);
+
err_put:
put_pd_read(pd);

@@ -2908,6 +2990,8 @@ ssize_t ib_uverbs_destroy_ah(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_AH, 1);
+
idr_remove_uobj(&ib_uverbs_ah_idr, uobj);

mutex_lock(&file->mutex);
@@ -3160,10 +3244,16 @@ int ib_uverbs_ex_create_flow(struct ib_uverbs_file *file,
err = -EINVAL;
goto err_free;
}
+
+ err = ib_rdmacg_try_charge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_FLOW, 1);
+ if (err)
+ goto err_free;
+
flow_id = ib_create_flow(qp, flow_attr, IB_FLOW_DOMAIN_USER);
if (IS_ERR(flow_id)) {
err = PTR_ERR(flow_id);
- goto err_free;
+ goto err_create;
}
flow_id->qp = qp;
flow_id->uobject = uobj;
@@ -3197,6 +3287,9 @@ err_copy:
idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
destroy_flow:
ib_destroy_flow(flow_id);
+err_create:
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_FLOW, 1);
err_free:
kfree(flow_attr);
err_put:
@@ -3236,8 +3329,11 @@ int ib_uverbs_ex_destroy_flow(struct ib_uverbs_file *file,
flow_id = uobj->object;

ret = ib_destroy_flow(flow_id);
- if (!ret)
+ if (!ret) {
uobj->live = 0;
+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_FLOW, 1);
+ }

put_uobj_write(uobj);

@@ -3305,6 +3401,11 @@ static int __uverbs_create_xsrq(struct ib_uverbs_file *file,
obj->uevent.events_reported = 0;
INIT_LIST_HEAD(&obj->uevent.event_list);

+ ret = ib_rdmacg_try_charge(&obj->uevent.uobject.cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_SRQ, 1);
+ if (ret)
+ goto err_put_cq;
+
srq = pd->device->create_srq(pd, &attr, udata);
if (IS_ERR(srq)) {
ret = PTR_ERR(srq);
@@ -3369,6 +3470,8 @@ err_destroy:
ib_destroy_srq(srq);

err_put:
+ ib_rdmacg_uncharge(&obj->uevent.uobject.cg_obj, ib_dev,
+ RDMA_VERB_RESOURCE_SRQ, 1);
put_pd_read(pd);

err_put_cq:
@@ -3553,6 +3656,8 @@ ssize_t ib_uverbs_destroy_srq(struct ib_uverbs_file *file,
if (ret)
return ret;

+ ib_rdmacg_uncharge(&uobj->cg_obj, ib_dev, RDMA_VERB_RESOURCE_SRQ, 1);
+
if (srq_type == IB_SRQT_XRC) {
us = container_of(obj, struct ib_usrq_object, uevent);
atomic_dec(&us->uxrcd->refcnt);
@@ -3586,6 +3691,7 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
struct ib_uverbs_ex_query_device_resp resp;
struct ib_uverbs_ex_query_device cmd;
struct ib_device_attr attr;
+ int limits[RDMA_RESOURCE_MAX];
int err;

if (ucore->inlen < sizeof(cmd))
@@ -3612,7 +3718,8 @@ int ib_uverbs_ex_query_device(struct ib_uverbs_file *file,
if (err)
return err;

- copy_query_dev_fields(file, ib_dev, &resp.base, &attr);
+ ib_rdmacg_query_limit(ib_dev, limits, RDMA_RESOURCE_MAX);
+ copy_query_dev_fields(file, ib_dev, &resp.base, &attr, limits);
resp.comp_mask = 0;

if (ucore->outlen < resp.response_length + sizeof(resp.odp_caps))
diff --git a/drivers/infiniband/core/uverbs_main.c b/drivers/infiniband/core/uverbs_main.c
index 39680ae..8bd179e 100644
--- a/drivers/infiniband/core/uverbs_main.c
+++ b/drivers/infiniband/core/uverbs_main.c
@@ -49,6 +49,7 @@
#include <asm/uaccess.h>

#include "uverbs.h"
+#include "core_priv.h"

MODULE_AUTHOR("Roland Dreier");
MODULE_DESCRIPTION("InfiniBand userspace verbs access");
@@ -227,6 +228,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_ah_idr, uobj);
ib_destroy_ah(ah);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_AH, 1);
kfree(uobj);
}

@@ -236,6 +239,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_mw_idr, uobj);
uverbs_dealloc_mw(mw);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_MW, 1);
kfree(uobj);
}

@@ -244,6 +249,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_rule_idr, uobj);
ib_destroy_flow(flow_id);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_FLOW, 1);
kfree(uobj);
}

@@ -258,6 +265,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
} else {
ib_uverbs_detach_umcast(qp, uqp);
ib_destroy_qp(qp);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_QP, 1);
}
ib_uverbs_release_uevent(file, &uqp->uevent);
kfree(uqp);
@@ -271,6 +280,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,
idr_remove_uobj(&ib_uverbs_srq_idr, uobj);
ib_destroy_srq(srq);
ib_uverbs_release_uevent(file, uevent);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_SRQ, 1);
kfree(uevent);
}

@@ -282,6 +293,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_cq_idr, uobj);
ib_destroy_cq(cq);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_CQ, 1);
ib_uverbs_release_ucq(file, ev_file, ucq);
kfree(ucq);
}
@@ -291,6 +304,8 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_mr_idr, uobj);
ib_dereg_mr(mr);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_MR, 1);
kfree(uobj);
}

@@ -311,9 +326,13 @@ static int ib_uverbs_cleanup_ucontext(struct ib_uverbs_file *file,

idr_remove_uobj(&ib_uverbs_pd_idr, uobj);
ib_dealloc_pd(pd);
+ ib_rdmacg_uncharge(&uobj->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_PD, 1);
kfree(uobj);
}

+ ib_rdmacg_uncharge(&context->cg_obj, context->device,
+ RDMA_VERB_RESOURCE_UCTX, 1);
put_pid(context->tgid);

return context->device->dealloc_ucontext(context);
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index 284b00c..d3d1713 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -59,6 +59,7 @@
#include <linux/atomic.h>
#include <linux/mmu_notifier.h>
#include <asm/uaccess.h>
+#include <linux/cgroup_rdma.h>

extern struct workqueue_struct *ib_wq;
extern struct workqueue_struct *ib_comp_wq;
@@ -111,6 +112,22 @@ enum rdma_protocol_type {
RDMA_PROTOCOL_USNIC_UDP
};

+enum rdma_resource_type {
+ RDMA_VERB_RESOURCE_UCTX,
+ RDMA_VERB_RESOURCE_AH,
+ RDMA_VERB_RESOURCE_PD,
+ RDMA_VERB_RESOURCE_CQ,
+ RDMA_VERB_RESOURCE_MR,
+ RDMA_VERB_RESOURCE_MW,
+ RDMA_VERB_RESOURCE_SRQ,
+ RDMA_VERB_RESOURCE_QP,
+ RDMA_VERB_RESOURCE_FLOW,
+ /*
+ * add any hw specific resource here as RDMA_HW_RESOURCE_NAME
+ */
+ RDMA_RESOURCE_MAX,
+};
+
__attribute_const__ enum rdma_transport_type
rdma_node_get_transport(enum rdma_node_type node_type);

@@ -1282,6 +1299,12 @@ struct ib_fmr_attr {
u8 page_shift;
};

+struct ib_rdmacg_object {
+#ifdef CONFIG_CGROUP_RDMA
+ struct rdma_cgroup *cg; /* owner rdma cgroup */
+#endif
+};
+
struct ib_umem;

struct ib_ucontext {
@@ -1314,12 +1337,14 @@ struct ib_ucontext {
struct list_head no_private_counters;
int odp_mrs_count;
#endif
+ struct ib_rdmacg_object cg_obj;
};

struct ib_uobject {
u64 user_handle; /* handle given to us by userspace */
struct ib_ucontext *context; /* associated user context */
void *object; /* containing object */
+ struct ib_rdmacg_object cg_obj; /* rdmacg object */
struct list_head list; /* link to context's list */
int id; /* index into kernel idr */
struct kref ref;
@@ -1872,6 +1897,10 @@ struct ib_device {
u8 phys_port_cnt;
struct ib_device_attr attrs;

+#ifdef CONFIG_CGROUP_RDMA
+ struct rdmacg_device cg_device;
+#endif
+
/**
* The following mandatory functions are used only at device
* registration. Keep functions such as these at the end of this
--
1.8.3.1