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Date: Fri, 11 Jun 2021 19:00:25 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Doug Ledford <dledford@...hat.com>,
Jason Gunthorpe <jgg@...dia.com>
Cc: Greg KH <gregkh@...uxfoundation.org>,
Kees Cook <keescook@...omium.org>,
Nathan Chancellor <nathan@...nel.org>,
Leon Romanovsky <leonro@...dia.com>,
Adit Ranadive <aditr@...are.com>,
Ariel Elior <aelior@...vell.com>,
Christian Benvenuti <benve@...co.com>,
clang-built-linux@...glegroups.com,
Dennis Dalessandro <dennis.dalessandro@...nelisnetworks.com>,
Devesh Sharma <devesh.sharma@...adcom.com>,
Gal Pressman <galpress@...zon.com>,
linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org,
Michal Kalderon <mkalderon@...vell.com>,
Mike Marciniszyn <mike.marciniszyn@...nelisnetworks.com>,
Mustafa Ismail <mustafa.ismail@...el.com>,
Naresh Kumar PBS <nareshkumar.pbs@...adcom.com>,
Nelson Escobar <neescoba@...co.com>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Potnuri Bharat Teja <bharat@...lsio.com>,
Selvin Xavier <selvin.xavier@...adcom.com>,
Shiraz Saleem <shiraz.saleem@...el.com>,
VMware PV-Drivers <pv-drivers@...are.com>,
Yishai Hadas <yishaih@...dia.com>,
Zhu Yanjun <zyjzyj2000@...il.com>
Subject: [PATCH rdma-next v2 06/15] RDMA/core: Simplify how the port sysfs is created
From: Jason Gunthorpe <jgg@...dia.com>
Use the same technique as gid_attrs now uses to manage the port
sysfs. Bundle everything into three allocations and use a single
sysfs_create_groups() to build everything in one shot.
All the memory is always freed in the kobj release function, removing most
of the error unwinding.
The gid_attr technique and the hw_counters are very similar, merge the two
together and combine the sysfs_create_group() call for hw_counters with
the single sysfs group setup.
Signed-off-by: Jason Gunthorpe <jgg@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
drivers/infiniband/core/sysfs.c | 322 ++++++++++----------------------
1 file changed, 103 insertions(+), 219 deletions(-)
diff --git a/drivers/infiniband/core/sysfs.c b/drivers/infiniband/core/sysfs.c
index 006bf759e890..2631c179e004 100644
--- a/drivers/infiniband/core/sysfs.c
+++ b/drivers/infiniband/core/sysfs.c
@@ -79,11 +79,12 @@ struct ib_port {
struct kobject kobj;
struct ib_device *ibdev;
struct gid_attr_group *gid_attr_group;
- struct attribute_group gid_group;
- struct attribute_group *pkey_group;
- const struct attribute_group *pma_table;
struct hw_stats_port_data *hw_stats_data;
+
+ struct attribute_group groups[3];
+ const struct attribute_group *groups_list[5];
u32 port_num;
+ struct port_table_attribute attrs_list[];
};
struct hw_stats_device_attribute {
@@ -112,7 +113,6 @@ struct hw_stats_device_data {
};
struct hw_stats_port_data {
- struct attribute_group group;
struct rdma_hw_stats *stats;
struct hw_stats_port_attribute attrs[];
};
@@ -750,30 +750,15 @@ static const struct attribute_group pma_group_noietf = {
static void ib_port_release(struct kobject *kobj)
{
- struct ib_port *p = container_of(kobj, struct ib_port, kobj);
- struct attribute *a;
+ struct ib_port *port = container_of(kobj, struct ib_port, kobj);
int i;
- if (p->gid_group.attrs) {
- for (i = 0; (a = p->gid_group.attrs[i]); ++i)
- kfree(a);
-
- kfree(p->gid_group.attrs);
- }
-
- if (p->pkey_group) {
- if (p->pkey_group->attrs) {
- for (i = 0; (a = p->pkey_group->attrs[i]); ++i)
- kfree(a);
-
- kfree(p->pkey_group->attrs);
- }
-
- kfree(p->pkey_group);
- p->pkey_group = NULL;
- }
-
- kfree(p);
+ for (i = 0; i != ARRAY_SIZE(port->groups); i++)
+ kfree(port->groups[i].attrs);
+ if (port->hw_stats_data)
+ kfree(port->hw_stats_data->stats);
+ kfree(port->hw_stats_data);
+ kfree(port);
}
static void ib_port_gid_attr_release(struct kobject *kobj)
@@ -798,49 +783,6 @@ static struct kobj_type gid_attr_type = {
.release = ib_port_gid_attr_release
};
-static struct attribute **
-alloc_group_attrs(ssize_t (*show)(struct ib_port *,
- struct port_attribute *, char *buf),
- int len)
-{
- struct attribute **tab_attr;
- struct port_table_attribute *element;
- int i;
-
- tab_attr = kcalloc(1 + len, sizeof(struct attribute *), GFP_KERNEL);
- if (!tab_attr)
- return NULL;
-
- for (i = 0; i < len; i++) {
- element = kzalloc(sizeof(struct port_table_attribute),
- GFP_KERNEL);
- if (!element)
- goto err;
-
- if (snprintf(element->name, sizeof(element->name),
- "%d", i) >= sizeof(element->name)) {
- kfree(element);
- goto err;
- }
-
- element->attr.attr.name = element->name;
- element->attr.attr.mode = S_IRUGO;
- element->attr.show = show;
- element->index = i;
- sysfs_attr_init(&element->attr.attr);
-
- tab_attr[i] = &element->attr.attr;
- }
-
- return tab_attr;
-
-err:
- while (--i >= 0)
- kfree(tab_attr[i]);
- kfree(tab_attr);
- return NULL;
-}
-
/*
* Figure out which counter table to use depending on
* the device capabilities.
@@ -1051,7 +993,8 @@ static void destroy_hw_device_stats(struct ib_device *ibdev)
ibdev->hw_stats_data = NULL;
}
-static struct hw_stats_port_data *alloc_hw_stats_port(struct ib_port *port)
+static struct hw_stats_port_data *
+alloc_hw_stats_port(struct ib_port *port, struct attribute_group *group)
{
struct ib_device *ibdev = port->ibdev;
struct hw_stats_port_data *data;
@@ -1073,13 +1016,13 @@ static struct hw_stats_port_data *alloc_hw_stats_port(struct ib_port *port)
GFP_KERNEL);
if (!data)
goto err_free_stats;
- data->group.attrs = kcalloc(stats->num_counters + 2,
- sizeof(*data->group.attrs), GFP_KERNEL);
- if (!data->group.attrs)
+ group->attrs = kcalloc(stats->num_counters + 2,
+ sizeof(*group->attrs), GFP_KERNEL);
+ if (!group->attrs)
goto err_free_data;
mutex_init(&stats->lock);
- data->group.name = "hw_counters";
+ group->name = "hw_counters";
data->stats = stats;
return data;
@@ -1090,20 +1033,14 @@ static struct hw_stats_port_data *alloc_hw_stats_port(struct ib_port *port)
return ERR_PTR(-ENOMEM);
}
-static void free_hw_stats_port(struct hw_stats_port_data *data)
-{
- kfree(data->group.attrs);
- kfree(data->stats);
- kfree(data);
-}
-
-static int setup_hw_port_stats(struct ib_port *port)
+static int setup_hw_port_stats(struct ib_port *port,
+ struct attribute_group *group)
{
struct hw_stats_port_attribute *attr;
struct hw_stats_port_data *data;
int i, ret;
- data = alloc_hw_stats_port(port);
+ data = alloc_hw_stats_port(port, group);
if (IS_ERR(data))
return PTR_ERR(data);
@@ -1112,9 +1049,10 @@ static int setup_hw_port_stats(struct ib_port *port)
data->stats->num_counters);
if (ret != data->stats->num_counters) {
if (WARN_ON(ret >= 0))
- ret = -EINVAL;
- goto err_free;
+ return -EINVAL;
+ return ret;
}
+
data->stats->timestamp = jiffies;
for (i = 0; i < data->stats->num_counters; i++) {
@@ -1124,7 +1062,7 @@ static int setup_hw_port_stats(struct ib_port *port)
attr->attr.attr.mode = 0444;
attr->attr.show = hw_stat_port_show;
attr->show = show_hw_stats;
- data->group.attrs[i] = &attr->attr.attr;
+ group->attrs[i] = &attr->attr.attr;
}
attr = &data->attrs[i];
@@ -1135,27 +1073,10 @@ static int setup_hw_port_stats(struct ib_port *port)
attr->show = show_stats_lifespan;
attr->attr.store = hw_stat_port_store;
attr->store = set_stats_lifespan;
- data->group.attrs[i] = &attr->attr.attr;
+ group->attrs[i] = &attr->attr.attr;
port->hw_stats_data = data;
- ret = sysfs_create_group(&port->kobj, &data->group);
- if (ret)
- goto err_free;
return 0;
-
-err_free:
- free_hw_stats_port(data);
- port->hw_stats_data = NULL;
- return ret;
-}
-
-static void destroy_hw_port_stats(struct ib_port *port)
-{
- if (!port->hw_stats_data)
- return;
- sysfs_remove_group(&port->kobj, &port->hw_stats_data->group);
- free_hw_stats_port(port->hw_stats_data);
- port->hw_stats_data = NULL;
}
struct rdma_hw_stats *ib_get_hw_stats_port(struct ib_device *ibdev,
@@ -1265,68 +1186,42 @@ static void destroy_gid_attrs(struct ib_port *port)
kobject_put(&gid_attr_group->kobj);
}
-static int add_port(struct ib_core_device *coredev, int port_num)
+/*
+ * Create the sysfs:
+ * ibp0s9/ports/XX/{gids,pkeys,counters}/YYY
+ */
+static struct ib_port *setup_port(struct ib_core_device *coredev, int port_num,
+ const struct ib_port_attr *attr)
{
struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
bool is_full_dev = &device->coredev == coredev;
+ const struct attribute_group **cur_group;
struct ib_port *p;
- struct ib_port_attr attr;
- int i;
int ret;
- ret = ib_query_port(device, port_num, &attr);
- if (ret)
- return ret;
-
- p = kzalloc(sizeof *p, GFP_KERNEL);
+ p = kzalloc(struct_size(p, attrs_list,
+ attr->gid_tbl_len + attr->pkey_tbl_len),
+ GFP_KERNEL);
if (!p)
- return -ENOMEM;
-
- p->ibdev = device;
- p->port_num = port_num;
+ return ERR_PTR(-ENOMEM);
+ p->ibdev = device;
+ p->port_num = port_num;
+ kobject_init(&p->kobj, &port_type);
- ret = kobject_init_and_add(&p->kobj, &port_type,
- coredev->ports_kobj,
- "%d", port_num);
+ cur_group = p->groups_list;
+ ret = alloc_port_table_group("gids", &p->groups[0], p->attrs_list,
+ attr->gid_tbl_len, show_port_gid);
if (ret)
goto err_put;
+ *cur_group++ = &p->groups[0];
- if (device->ops.process_mad && is_full_dev) {
- p->pma_table = get_counter_table(device, port_num);
- ret = sysfs_create_group(&p->kobj, p->pma_table);
+ if (attr->pkey_tbl_len) {
+ ret = alloc_port_table_group("pkeys", &p->groups[1],
+ p->attrs_list + attr->gid_tbl_len,
+ attr->pkey_tbl_len, show_port_pkey);
if (ret)
goto err_put;
- }
-
- p->gid_group.name = "gids";
- p->gid_group.attrs = alloc_group_attrs(show_port_gid, attr.gid_tbl_len);
- if (!p->gid_group.attrs) {
- ret = -ENOMEM;
- goto err_remove_pma;
- }
-
- ret = sysfs_create_group(&p->kobj, &p->gid_group);
- if (ret)
- goto err_free_gid;
-
- if (attr.pkey_tbl_len) {
- p->pkey_group = kzalloc(sizeof(*p->pkey_group), GFP_KERNEL);
- if (!p->pkey_group) {
- ret = -ENOMEM;
- goto err_remove_gid;
- }
-
- p->pkey_group->name = "pkeys";
- p->pkey_group->attrs = alloc_group_attrs(show_port_pkey,
- attr.pkey_tbl_len);
- if (!p->pkey_group->attrs) {
- ret = -ENOMEM;
- goto err_free_pkey_group;
- }
-
- ret = sysfs_create_group(&p->kobj, p->pkey_group);
- if (ret)
- goto err_free_pkey;
+ *cur_group++ = &p->groups[1];
}
/*
@@ -1335,66 +1230,45 @@ static int add_port(struct ib_core_device *coredev, int port_num)
* counter initialization.
*/
if (port_num && is_full_dev) {
- ret = setup_hw_port_stats(p);
+ ret = setup_hw_port_stats(p, &p->groups[2]);
if (ret && ret != -EOPNOTSUPP)
- goto err_remove_pkey;
+ goto err_put;
+ if (!ret)
+ *cur_group++ = &p->groups[2];
}
- ret = setup_gid_attrs(p, &attr);
- if (ret)
- goto err_remove_stats;
- if (device->ops.init_port && is_full_dev) {
- ret = device->ops.init_port(device, port_num, &p->kobj);
- if (ret)
- goto err_remove_gid_attrs;
- }
+ if (device->ops.process_mad && is_full_dev)
+ *cur_group++ = get_counter_table(device, port_num);
+
+ ret = kobject_add(&p->kobj, coredev->ports_kobj, "%d", port_num);
+ if (ret)
+ goto err_put;
+ ret = sysfs_create_groups(&p->kobj, p->groups_list);
+ if (ret)
+ goto err_del;
list_add_tail(&p->kobj.entry, &coredev->port_list);
if (device->port_data && is_full_dev)
device->port_data[port_num].sysfs = p;
- kobject_uevent(&p->kobj, KOBJ_ADD);
- return 0;
-
-err_remove_gid_attrs:
- destroy_gid_attrs(p);
-
-err_remove_stats:
- destroy_hw_port_stats(p);
-
-err_remove_pkey:
- if (p->pkey_group)
- sysfs_remove_group(&p->kobj, p->pkey_group);
-
-err_free_pkey:
- if (p->pkey_group) {
- for (i = 0; i < attr.pkey_tbl_len; ++i)
- kfree(p->pkey_group->attrs[i]);
-
- kfree(p->pkey_group->attrs);
- p->pkey_group->attrs = NULL;
- }
-
-err_free_pkey_group:
- kfree(p->pkey_group);
-
-err_remove_gid:
- sysfs_remove_group(&p->kobj, &p->gid_group);
-
-err_free_gid:
- for (i = 0; i < attr.gid_tbl_len; ++i)
- kfree(p->gid_group.attrs[i]);
-
- kfree(p->gid_group.attrs);
- p->gid_group.attrs = NULL;
-
-err_remove_pma:
- if (p->pma_table)
- sysfs_remove_group(&p->kobj, p->pma_table);
+ return p;
+err_del:
+ kobject_del(&p->kobj);
err_put:
kobject_put(&p->kobj);
- return ret;
+ return ERR_PTR(ret);
+}
+
+static void destroy_port(struct ib_port *port)
+{
+ if (port->ibdev->port_data &&
+ port->ibdev->port_data[port->port_num].sysfs == port)
+ port->ibdev->port_data[port->port_num].sysfs = NULL;
+ list_del(&port->kobj.entry);
+ sysfs_remove_groups(&port->kobj, port->groups_list);
+ kobject_del(&port->kobj);
+ kobject_put(&port->kobj);
}
static const char *node_type_string(int node_type)
@@ -1511,25 +1385,13 @@ const struct attribute_group ib_dev_attr_group = {
void ib_free_port_attrs(struct ib_core_device *coredev)
{
- struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
- bool is_full_dev = &device->coredev == coredev;
struct kobject *p, *t;
list_for_each_entry_safe(p, t, &coredev->port_list, entry) {
struct ib_port *port = container_of(p, struct ib_port, kobj);
- list_del(&p->entry);
- destroy_hw_port_stats(port);
- if (device->port_data && is_full_dev)
- device->port_data[port->port_num].sysfs = NULL;
-
- if (port->pma_table)
- sysfs_remove_group(p, port->pma_table);
- if (port->pkey_group)
- sysfs_remove_group(p, port->pkey_group);
- sysfs_remove_group(p, &port->gid_group);
destroy_gid_attrs(port);
- kobject_put(p);
+ destroy_port(port);
}
kobject_put(coredev->ports_kobj);
@@ -1538,7 +1400,8 @@ void ib_free_port_attrs(struct ib_core_device *coredev)
int ib_setup_port_attrs(struct ib_core_device *coredev)
{
struct ib_device *device = rdma_device_to_ibdev(&coredev->dev);
- u32 port;
+ bool is_full_dev = &device->coredev == coredev;
+ u32 port_num;
int ret;
coredev->ports_kobj = kobject_create_and_add("ports",
@@ -1546,12 +1409,33 @@ int ib_setup_port_attrs(struct ib_core_device *coredev)
if (!coredev->ports_kobj)
return -ENOMEM;
- rdma_for_each_port (device, port) {
- ret = add_port(coredev, port);
+ rdma_for_each_port (device, port_num) {
+ struct ib_port_attr attr;
+ struct ib_port *port;
+
+ ret = ib_query_port(device, port_num, &attr);
if (ret)
goto err_put;
- }
+ port = setup_port(coredev, port_num, &attr);
+ if (IS_ERR(port)) {
+ ret = PTR_ERR(port);
+ goto err_put;
+ }
+
+ ret = setup_gid_attrs(port, &attr);
+ if (ret)
+ goto err_put;
+
+ if (device->ops.init_port && is_full_dev) {
+ ret = device->ops.init_port(device, port_num,
+ &port->kobj);
+ if (ret)
+ goto err_put;
+ }
+
+ kobject_uevent(&port->kobj, KOBJ_ADD);
+ }
return 0;
err_put:
--
2.31.1
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