[PATCH net-next 10/14] devlink: restart dump based on devlink instance ids (nested)

Jakub Kicinski
2023-01-04T04:17:15Z

Use xarray id for cases of simple sub-object iteration.
We'll now use the dump->instance for the devlink instances
and dump->idx for subobject index.

Moving the definition of idx into the inner loop makes sense,
so while at it also move other sub-object local variables into
the loop.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
net/devlink/devl_internal.h | 2 +-
net/devlink/leftover.c | 93 +++++++++++++++++++------------------
2 files changed, 49 insertions(+), 46 deletions(-)

diff --git a/net/devlink/devl_internal.h b/net/devlink/devl_internal.h
index a567ff77601d..5adac38454fd 100644
--- a/net/devlink/devl_internal.h
+++ b/net/devlink/devl_internal.h
@@ -129,7 +129,7 @@ struct devlink_nl_dump_state {
#define devlink_dump_for_each_instance_get(msg, dump, devlink) \
for (; (devlink = devlinks_xa_find_get(sock_net(msg->sk), \
&dump->instance, xa_find)); \
- dump->instance++)
+ dump->instance++, dump->idx = 0)

extern const struct genl_small_ops devlink_nl_ops[56];

diff --git a/net/devlink/leftover.c b/net/devlink/leftover.c
index 0f24b321b0bb..028a763feb50 100644
--- a/net/devlink/leftover.c
+++ b/net/devlink/leftover.c
@@ -1223,13 +1223,13 @@ static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
- struct devlink_rate *devlink_rate;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err = 0;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_rate *devlink_rate;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(devlink_rate, &devlink->rate_list, list) {
enum devlink_command cmd = DEVLINK_CMD_RATE_NEW;
@@ -1245,6 +1245,7 @@ static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -1256,7 +1257,6 @@ static int devlink_nl_cmd_rate_get_dumpit(struct sk_buff *msg,
if (err != -EMSGSIZE)
return err;

- dump->idx = idx;
return msg->len;
}

@@ -1363,12 +1363,13 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
struct devlink *devlink;
- struct devlink_port *devlink_port;
- unsigned long index, port_index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_port *devlink_port;
+ unsigned long port_index;
+ int idx = 0;
+
devl_lock(devlink);
xa_for_each(&devlink->ports, port_index, devlink_port) {
if (idx < dump->idx) {
@@ -1383,6 +1384,7 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -1391,7 +1393,6 @@ static int devlink_nl_cmd_port_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -2143,11 +2144,11 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
struct devlink_linecard *linecard;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ int idx = 0;
+
mutex_lock(&devlink->linecards_lock);
list_for_each_entry(linecard, &devlink->linecard_list, list) {
if (idx < dump->idx) {
@@ -2165,6 +2166,7 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
if (err) {
mutex_unlock(&devlink->linecards_lock);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -2173,7 +2175,6 @@ static int devlink_nl_cmd_linecard_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -2404,12 +2405,12 @@ static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
struct devlink *devlink;
- struct devlink_sb *devlink_sb;
- unsigned long index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_sb *devlink_sb;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(devlink_sb, &devlink->sb_list, list) {
if (idx < dump->idx) {
@@ -2424,6 +2425,7 @@ static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -2432,7 +2434,6 @@ static int devlink_nl_cmd_sb_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -5339,13 +5340,13 @@ static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
- struct devlink_param_item *param_item;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err = 0;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_param_item *param_item;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(param_item, &devlink->param_list, list) {
if (idx < dump->idx) {
@@ -5362,6 +5363,7 @@ static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
} else if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -5373,7 +5375,6 @@ static int devlink_nl_cmd_param_get_dumpit(struct sk_buff *msg,
if (err != -EMSGSIZE)
return err;

- dump->idx = idx;
return msg->len;
}

@@ -7893,14 +7894,15 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
- struct devlink_health_reporter *reporter;
- unsigned long index, port_index;
- struct devlink_port *port;
struct devlink *devlink;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_health_reporter *reporter;
+ struct devlink_port *port;
+ unsigned long port_index;
+ int idx = 0;
+
mutex_lock(&devlink->reporters_lock);
list_for_each_entry(reporter, &devlink->reporter_list,
list) {
@@ -7915,6 +7917,7 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
if (err) {
mutex_unlock(&devlink->reporters_lock);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -7938,6 +7941,7 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
mutex_unlock(&port->reporters_lock);
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -7948,7 +7952,6 @@ devlink_nl_cmd_health_reporter_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -8474,13 +8477,13 @@ static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
struct netlink_callback *cb)
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
- struct devlink_trap_item *trap_item;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_trap_item *trap_item;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(trap_item, &devlink->trap_list, list) {
if (idx < dump->idx) {
@@ -8495,6 +8498,7 @@ static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -8503,7 +8507,6 @@ static int devlink_nl_cmd_trap_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -8690,14 +8693,14 @@ static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
enum devlink_command cmd = DEVLINK_CMD_TRAP_GROUP_NEW;
- struct devlink_trap_group_item *group_item;
u32 portid = NETLINK_CB(cb->skb).portid;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_trap_group_item *group_item;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(group_item, &devlink->trap_group_list,
list) {
@@ -8713,6 +8716,7 @@ static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -8721,7 +8725,6 @@ static int devlink_nl_cmd_trap_group_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

@@ -8994,14 +8997,14 @@ static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
{
struct devlink_nl_dump_state *dump = devl_dump_state(cb);
enum devlink_command cmd = DEVLINK_CMD_TRAP_POLICER_NEW;
- struct devlink_trap_policer_item *policer_item;
u32 portid = NETLINK_CB(cb->skb).portid;
struct devlink *devlink;
- unsigned long index;
- int idx = 0;
int err;

- devlinks_xa_for_each_registered_get(sock_net(msg->sk), index, devlink) {
+ devlink_dump_for_each_instance_get(msg, dump, devlink) {
+ struct devlink_trap_policer_item *policer_item;
+ int idx = 0;
+
devl_lock(devlink);
list_for_each_entry(policer_item, &devlink->trap_policer_list,
list) {
@@ -9017,6 +9020,7 @@ static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
if (err) {
devl_unlock(devlink);
devlink_put(devlink);
+ dump->idx = idx;
goto out;
}
idx++;
@@ -9025,7 +9029,6 @@ static int devlink_nl_cmd_trap_policer_get_dumpit(struct sk_buff *msg,
devlink_put(devlink);
}
out:
- dump->idx = idx;
return msg->len;
}

--
2.38.1