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authorEran Ben Elisha <eranbe@mellanox.com>2019-01-17 23:59:17 +0200
committerDavid S. Miller <davem@davemloft.net>2019-01-18 14:51:23 -0800
commit12bd0dcefe88782ac1c9fff632958dd1b71d27e5 (patch)
treebc926ff94731344b9283b6d1dfec0faad13fce20 /net
parent8a66704a13d9713593342e29b4f0c19762f5746b (diff)
downloadlinux-12bd0dcefe88782ac1c9fff632958dd1b71d27e5.tar.bz2
devlink: Add health dump {get,clear} commands
Add devlink health dump commands, in order to run an dump operation over a specific reporter. The supported operations are dump_get in order to get last saved dump (if not exist, dump now) and dump_clear to clear last saved dump. It is expected from driver's callback for diagnose command to fill it via the buffer descriptors API. Devlink will parse it and convert it to netlink nla API in order to pass it to the user. Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com> Reviewed-by: Moshe Shemesh <moshe@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/core/devlink.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 57252ca31e1e..60248a53c0ad 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c
@@ -4544,6 +4544,65 @@ out:
return err;
}
+static void
+devlink_health_dump_clear(struct devlink_health_reporter *reporter)
+{
+ reporter->dump_avail = false;
+ reporter->dump_ts = 0;
+ devlink_health_buffers_reset(reporter->dump_buffers_array,
+ DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size));
+}
+
+static int devlink_nl_cmd_health_reporter_dump_get_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+ u64 num_of_buffers;
+ int err;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ if (!reporter->ops->dump)
+ return -EOPNOTSUPP;
+
+ num_of_buffers =
+ DEVLINK_HEALTH_SIZE_TO_BUFFERS(reporter->ops->dump_size);
+
+ mutex_lock(&reporter->dump_lock);
+ err = devlink_health_do_dump(reporter, NULL);
+ if (err)
+ goto out;
+
+ err = devlink_health_buffer_snd(info,
+ DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
+ 0, reporter->dump_buffers_array,
+ num_of_buffers);
+
+out:
+ mutex_unlock(&reporter->dump_lock);
+ return err;
+}
+
+static int
+devlink_nl_cmd_health_reporter_dump_clear_doit(struct sk_buff *skb,
+ struct genl_info *info)
+{
+ struct devlink *devlink = info->user_ptr[0];
+ struct devlink_health_reporter *reporter;
+
+ reporter = devlink_health_reporter_get_from_info(devlink, info);
+ if (!reporter)
+ return -EINVAL;
+
+ mutex_lock(&reporter->dump_lock);
+ devlink_health_dump_clear(reporter);
+ mutex_unlock(&reporter->dump_lock);
+ return 0;
+}
+
static const struct nla_policy devlink_nl_policy[DEVLINK_ATTR_MAX + 1] = {
[DEVLINK_ATTR_BUS_NAME] = { .type = NLA_NUL_STRING },
[DEVLINK_ATTR_DEV_NAME] = { .type = NLA_NUL_STRING },
@@ -4821,6 +4880,22 @@ static const struct genl_ops devlink_nl_ops[] = {
.flags = GENL_ADMIN_PERM,
.internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK,
},
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_GET,
+ .doit = devlink_nl_cmd_health_reporter_dump_get_doit,
+ .policy = devlink_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ DEVLINK_NL_FLAG_NO_LOCK,
+ },
+ {
+ .cmd = DEVLINK_CMD_HEALTH_REPORTER_DUMP_CLEAR,
+ .doit = devlink_nl_cmd_health_reporter_dump_clear_doit,
+ .policy = devlink_nl_policy,
+ .flags = GENL_ADMIN_PERM,
+ .internal_flags = DEVLINK_NL_FLAG_NEED_DEVLINK |
+ DEVLINK_NL_FLAG_NO_LOCK,
+ },
};
static struct genl_family devlink_nl_family __ro_after_init = {