[PATCHv2 net-next 1/2] devlink: Return right error code in case of errors for region read
From: Parav Pandit <hidden>
Date: 2019-02-12 20:24:06
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
devlink_nl_cmd_region_read_dumpit() misses to return right error code on
most error conditions.
Return the right error code on such errors.
Fixes: 4e54795a27f5 ("devlink: Add support for region snapshot read command")
Signed-off-by: Parav Pandit <redacted>
---
v1->v2:
- Rebased
---
net/core/devlink.c | 26 +++++++++++++++++++-------
1 file changed, 19 insertions(+), 7 deletions(-)
diff --git a/net/core/devlink.c b/net/core/devlink.c
index 283c3ed..312084f 100644
--- a/net/core/devlink.c
+++ b/net/core/devlink.c@@ -3646,26 +3646,34 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, goto out_free; devlink = devlink_get_from_attrs(sock_net(cb->skb->sk), attrs); - if (IS_ERR(devlink)) + if (IS_ERR(devlink)) { + err = PTR_ERR(devlink); goto out_free; + } mutex_lock(&devlink_mutex); mutex_lock(&devlink->lock); if (!attrs[DEVLINK_ATTR_REGION_NAME] || - !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) + !attrs[DEVLINK_ATTR_REGION_SNAPSHOT_ID]) { + err = -EINVAL; goto out_unlock; + } region_name = nla_data(attrs[DEVLINK_ATTR_REGION_NAME]); region = devlink_region_get_by_name(devlink, region_name); - if (!region) + if (!region) { + err = -EINVAL; goto out_unlock; + } hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, &devlink_nl_family, NLM_F_ACK | NLM_F_MULTI, DEVLINK_CMD_REGION_READ); - if (!hdr) + if (!hdr) { + err = -EMSGSIZE; goto out_unlock; + } err = devlink_nl_put_handle(skb, devlink); if (err)
@@ -3676,8 +3684,10 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, goto nla_put_failure; chunks_attr = nla_nest_start(skb, DEVLINK_ATTR_REGION_CHUNKS); - if (!chunks_attr) + if (!chunks_attr) { + err = -EMSGSIZE; goto nla_put_failure; + } if (attrs[DEVLINK_ATTR_REGION_CHUNK_ADDR] && attrs[DEVLINK_ATTR_REGION_CHUNK_LEN]) {
@@ -3700,8 +3710,10 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, goto nla_put_failure; /* Check if there was any progress done to prevent infinite loop */ - if (ret_offset == start_offset) + if (ret_offset == start_offset) { + err = -EINVAL; goto nla_put_failure; + } *((u64 *)&cb->args[0]) = ret_offset;
@@ -3720,7 +3732,7 @@ static int devlink_nl_cmd_region_read_dumpit(struct sk_buff *skb, mutex_unlock(&devlink_mutex); out_free: kfree(attrs); - return 0; + return err; } struct devlink_info_req {
--
1.8.3.1