[PATCH net-next v3] net/ncsi: Extend NC-SI Netlink interface to allow user space to send NC-SI command
Justin.Lee1 at Dell.com
Justin.Lee1 at Dell.com
Thu Oct 11 02:51:24 AEDT 2018
Hi Samual,
I will address the comment and send out the v4.
Thanks,
Justin
> On Mon, 2018-10-08 at 23:13 +0000, Justin.Lee1 at Dell.com wrote:
> > The new command (NCSI_CMD_SEND_CMD) is added to allow user space
> > application to send NC-SI command to the network card.
> > Also, add a new attribute (NCSI_ATTR_DATA) for transferring request and response.
> >
> > The work flow is as below.
> >
> > Request:
> > User space application
> > -> Netlink interface (msg)
> > -> new Netlink handler - ncsi_send_cmd_nl()
> > -> ncsi_xmit_cmd()
> >
> > Response:
> > Response received - ncsi_rcv_rsp()
> > -> internal response handler - ncsi_rsp_handler_xxx()
> > -> ncsi_rsp_handler_netlink()
> > -> ncsi_send_netlink_rsp ()
> > -> Netlink interface (msg)
> > -> user space application
> >
> > Command timeout - ncsi_request_timeout()
> > -> ncsi_send_netlink_timeout ()
> > -> Netlink interface (msg with zero data length)
> > -> user space application
> >
> > Error:
> > Error detected
> > -> ncsi_send_netlink_err ()
> > -> Netlink interface (err msg)
> > -> user space application
>
> Hi Justin,
>
> I've built and tested this and it works as expected; except for some very
> minor comments below:
>
> Reviewed-by: Samuel Mendoza-Jonas <sam at mendozajonas.com>
>
> >
> > V3: Based on http://patchwork.ozlabs.org/patch/979688/ to remove the duplicated code.
> > V2: Remove non-related debug message and clean up the code.
>
> It's better to put these change notes under the --- below so they're not
> included in the commit message, but thanks for including them!
>
> >
> >
> > Signed-off-by: Justin Lee <justin.lee1 at dell.com>
> >
> >
> > ---
> > include/uapi/linux/ncsi.h | 3 +
> > net/ncsi/internal.h | 10 ++-
> > net/ncsi/ncsi-cmd.c | 8 ++
> > net/ncsi/ncsi-manage.c | 16 ++++
> > net/ncsi/ncsi-netlink.c | 204 ++++++++++++++++++++++++++++++++++++++++++++++
> > net/ncsi/ncsi-netlink.h | 12 +++
> > net/ncsi/ncsi-rsp.c | 67 +++++++++++++--
> > 7 files changed, 314 insertions(+), 6 deletions(-)
> >
> > diff --git a/include/uapi/linux/ncsi.h b/include/uapi/linux/ncsi.h
> > index 4c292ec..4992bfc 100644
> > --- a/include/uapi/linux/ncsi.h
> > +++ b/include/uapi/linux/ncsi.h
> > @@ -30,6 +30,7 @@ enum ncsi_nl_commands {
> > NCSI_CMD_PKG_INFO,
> > NCSI_CMD_SET_INTERFACE,
> > NCSI_CMD_CLEAR_INTERFACE,
> > + NCSI_CMD_SEND_CMD,
> >
> > __NCSI_CMD_AFTER_LAST,
> > NCSI_CMD_MAX = __NCSI_CMD_AFTER_LAST - 1
> > @@ -43,6 +44,7 @@ enum ncsi_nl_commands {
> > * @NCSI_ATTR_PACKAGE_LIST: nested array of NCSI_PKG_ATTR attributes
> > * @NCSI_ATTR_PACKAGE_ID: package ID
> > * @NCSI_ATTR_CHANNEL_ID: channel ID
> > + * @NCSI_ATTR_DATA: command payload
> > * @NCSI_ATTR_MAX: highest attribute number
> > */
> > enum ncsi_nl_attrs {
> > @@ -51,6 +53,7 @@ enum ncsi_nl_attrs {
> > NCSI_ATTR_PACKAGE_LIST,
> > NCSI_ATTR_PACKAGE_ID,
> > NCSI_ATTR_CHANNEL_ID,
> > + NCSI_ATTR_DATA,
> >
> > __NCSI_ATTR_AFTER_LAST,
> > NCSI_ATTR_MAX = __NCSI_ATTR_AFTER_LAST - 1
> > diff --git a/net/ncsi/internal.h b/net/ncsi/internal.h
> > index 3d0a33b..e9db100 100644
> > --- a/net/ncsi/internal.h
> > +++ b/net/ncsi/internal.h
> > @@ -175,6 +175,8 @@ struct ncsi_package;
> > #define NCSI_RESERVED_CHANNEL 0x1f
> > #define NCSI_CHANNEL_INDEX(c) ((c) & ((1 << NCSI_PACKAGE_SHIFT) - 1))
> > #define NCSI_TO_CHANNEL(p, c) (((p) << NCSI_PACKAGE_SHIFT) | (c))
> > +#define NCSI_MAX_PACKAGE 8
> > +#define NCSI_MAX_CHANNEL 32
> >
> > struct ncsi_channel {
> > unsigned char id;
> > @@ -219,12 +221,17 @@ struct ncsi_request {
> > unsigned char id; /* Request ID - 0 to 255 */
> > bool used; /* Request that has been assigned */
> > unsigned int flags; /* NCSI request property */
> > -#define NCSI_REQ_FLAG_EVENT_DRIVEN 1
> > +#define NCSI_REQ_FLAG_EVENT_DRIVEN 1
> > +#define NCSI_REQ_FLAG_NETLINK_DRIVEN 2
> > struct ncsi_dev_priv *ndp; /* Associated NCSI device */
> > struct sk_buff *cmd; /* Associated NCSI command packet */
> > struct sk_buff *rsp; /* Associated NCSI response packet */
> > struct timer_list timer; /* Timer on waiting for response */
> > bool enabled; /* Time has been enabled or not */
> > +
> > + u32 snd_seq; /* netlink sending sequence number */
> > + u32 snd_portid; /* netlink portid of sender */
> > + struct nlmsghdr nlhdr; /* netlink message header */
> > };
> >
> > enum {
> > @@ -310,6 +317,7 @@ struct ncsi_cmd_arg {
> > unsigned int dwords[4];
> > };
> > unsigned char *data; /* NCSI OEM data */
> > + struct genl_info *info; /* Netlink information */
> > };
> >
> > extern struct list_head ncsi_dev_list;
> > diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
> > index 82b7d92..356af47 100644
> > --- a/net/ncsi/ncsi-cmd.c
> > +++ b/net/ncsi/ncsi-cmd.c
> > @@ -17,6 +17,7 @@
> > #include <net/ncsi.h>
> > #include <net/net_namespace.h>
> > #include <net/sock.h>
> > +#include <net/genetlink.h>
> >
> > #include "internal.h"
> > #include "ncsi-pkt.h"
> > @@ -346,6 +347,13 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
> > if (!nr)
> > return -ENOMEM;
> >
> > + /* track netlink information */
> > + if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
> > + nr->snd_seq = nca->info->snd_seq;
> > + nr->snd_portid = nca->info->snd_portid;
> > + nr->nlhdr = *nca->info->nlhdr;
> > + }
> > +
> > /* Prepare the packet */
> > nca->id = nr->id;
> > ret = nch->handler(nr->cmd, nca);
> > diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
> > index 0912847..76a4bcb 100644
> > --- a/net/ncsi/ncsi-manage.c
> > +++ b/net/ncsi/ncsi-manage.c
> > @@ -19,6 +19,7 @@
> > #include <net/addrconf.h>
> > #include <net/ipv6.h>
> > #include <net/if_inet6.h>
> > +#include <net/genetlink.h>
> >
> > #include "internal.h"
> > #include "ncsi-pkt.h"
> > @@ -406,6 +407,9 @@ static void ncsi_request_timeout(struct timer_list *t)
> > {
> > struct ncsi_request *nr = from_timer(nr, t, timer);
> > struct ncsi_dev_priv *ndp = nr->ndp;
> > + struct ncsi_package *np;
> > + struct ncsi_channel *nc;
> > + struct ncsi_cmd_pkt *cmd;
> > unsigned long flags;
> >
> > /* If the request already had associated response,
> > @@ -419,6 +423,18 @@ static void ncsi_request_timeout(struct timer_list *t)
> > }
> > spin_unlock_irqrestore(&ndp->lock, flags);
> >
> > + if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
> > + if (nr->cmd) {
> > + /* Find the package */
> > + cmd = (struct ncsi_cmd_pkt *)
> > + skb_network_header(nr->cmd);
> > + ncsi_find_package_and_channel(ndp,
> > + cmd->cmd.common.channel,
> > + &np, &nc);
> > + ncsi_send_netlink_timeout(nr, np, nc);
> > + }
> > + }
> > +
> > /* Release the request */
> > ncsi_free_request(nr);
> > }
> > diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c
> > index 45f33d6..3941bf6 100644
> > --- a/net/ncsi/ncsi-netlink.c
> > +++ b/net/ncsi/ncsi-netlink.c
> > @@ -20,6 +20,7 @@
> > #include <uapi/linux/ncsi.h>
> >
> > #include "internal.h"
> > +#include "ncsi-pkt.h"
> > #include "ncsi-netlink.h"
> >
> > static struct genl_family ncsi_genl_family;
> > @@ -29,6 +30,7 @@ static const struct nla_policy ncsi_genl_policy[NCSI_ATTR_MAX + 1] = {
> > [NCSI_ATTR_PACKAGE_LIST] = { .type = NLA_NESTED },
> > [NCSI_ATTR_PACKAGE_ID] = { .type = NLA_U32 },
> > [NCSI_ATTR_CHANNEL_ID] = { .type = NLA_U32 },
> > + [NCSI_ATTR_DATA] = { .type = NLA_BINARY, .len = 2048 },
> > };
> >
> > static struct ncsi_dev_priv *ndp_from_ifindex(struct net *net, u32 ifindex)
> > @@ -366,6 +368,202 @@ static int ncsi_clear_interface_nl(struct sk_buff *msg, struct genl_info *info)
> > return 0;
> > }
> >
> > +static int ncsi_send_cmd_nl(struct sk_buff *msg, struct genl_info *info)
> > +{
> > + struct ncsi_dev_priv *ndp;
> > +
> > + struct ncsi_cmd_arg nca;
> > + struct ncsi_pkt_hdr *hdr;
> > +
> > + u32 package_id, channel_id;
> > + unsigned char *data;
> > + int len, ret;
> > +
> > + if (!info || !info->attrs) {
> > + ret = -EINVAL;
> > + goto out;
> > + }
> > +
> > + if (!info->attrs[NCSI_ATTR_IFINDEX]) {
> > + ret = -EINVAL;
> > + goto out;
> > + }
> > +
> > + if (!info->attrs[NCSI_ATTR_PACKAGE_ID]) {
> > + ret = -EINVAL;
> > + goto out;
> > + }
> > +
> > + if (!info->attrs[NCSI_ATTR_CHANNEL_ID]) {
> > + ret = -EINVAL;
> > + goto out;
> > + }
> > +
> > + ndp = ndp_from_ifindex(get_net(sock_net(msg->sk)),
> > + nla_get_u32(info->attrs[NCSI_ATTR_IFINDEX]));
> > + if (!ndp) {
> > + ret = -ENODEV;
> > + goto out;
> > + }
> > +
> > + package_id = nla_get_u32(info->attrs[NCSI_ATTR_PACKAGE_ID]);
> > + channel_id = nla_get_u32(info->attrs[NCSI_ATTR_CHANNEL_ID]);
> > +
> > + if (package_id >= NCSI_MAX_PACKAGE || channel_id >= NCSI_MAX_CHANNEL) {
> > + ret = -ERANGE;
> > + goto out_netlink;
> > + }
> > +
> > + len = nla_len(info->attrs[NCSI_ATTR_DATA]);
> > + if (len < sizeof(struct ncsi_pkt_hdr)) {
> > + netdev_info(ndp->ndev.dev, "NCSI: no OEM command to send %u\n",
> > + package_id);
>
> Technically we can send any command via this interface so saying "no OEM
> command" may be a little confusing as a message.
>
> > + ret = -EINVAL;
> > + goto out_netlink;
> > + } else {
> > + data = (unsigned char *)nla_data(info->attrs[NCSI_ATTR_DATA]);
> > + }
> > +
> > + hdr = (struct ncsi_pkt_hdr *)data;
> > +
> > + nca.ndp = ndp;
> > + nca.package = (unsigned char)package_id;
> > + nca.channel = (unsigned char)channel_id;
> > + nca.type = hdr->type;
> > + nca.req_flags = NCSI_REQ_FLAG_NETLINK_DRIVEN;
> > + nca.info = info;
> > + nca.payload = ntohs(hdr->length);
> > + nca.data = data + sizeof(*hdr);
> > +
> > + ret = ncsi_xmit_cmd(&nca);
> > +out_netlink:
> > + if (ret != 0) {
> > + netdev_err(ndp->ndev.dev,
> > + "NCSI: Error %d sending OEM command\n",
> > + ret);
> > + ncsi_send_netlink_err(ndp->ndev.dev,
> > + info->snd_seq,
> > + info->snd_portid,
> > + info->nlhdr,
> > + ret);
> > + }
> > +out:
> > + return ret;
> > +}
> > +
> > +int ncsi_send_netlink_rsp(struct ncsi_request *nr,
> > + struct ncsi_package *np,
> > + struct ncsi_channel *nc)
> > +{
> > + struct sk_buff *skb;
> > + struct net *net;
> > + void *hdr;
> > + int rc;
> > +
> > + netdev_dbg(nr->ndp->ndev.dev, "NCSI: %s\n", __func__);
>
> We probably don't need this message.
>
> > +
> > + net = dev_net(nr->rsp->dev);
> > +
> > + skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
> > + if (!skb)
> > + return -ENOMEM;
> > +
> > + hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
> > + &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
> > + if (!hdr) {
> > + kfree_skb(skb);
> > + return -EMSGSIZE;
> > + }
> > +
> > + nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->rsp->dev->ifindex);
> > + if (np)
> > + nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
> > + if (nc)
> > + nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
> > + else
> > + nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
> > +
> > + rc = nla_put(skb, NCSI_ATTR_DATA, nr->rsp->len, (void *)nr->rsp->data);
> > + if (rc)
> > + goto err;
> > +
> > + genlmsg_end(skb, hdr);
> > + return genlmsg_unicast(net, skb, nr->snd_portid);
> > +
> > +err:
> > + kfree_skb(skb);
> > + return rc;
> > +}
> > +
> > +int ncsi_send_netlink_timeout(struct ncsi_request *nr,
> > + struct ncsi_package *np,
> > + struct ncsi_channel *nc)
> > +{
> > + struct sk_buff *skb;
> > + struct net *net;
> > + void *hdr;
> > +
> > + netdev_dbg(nr->ndp->ndev.dev, "NCSI: %s\n", __func__);
>
> Or this one.
>
> > +
> > + skb = genlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
> > + if (!skb)
> > + return -ENOMEM;
> > +
> > + hdr = genlmsg_put(skb, nr->snd_portid, nr->snd_seq,
> > + &ncsi_genl_family, 0, NCSI_CMD_SEND_CMD);
> > + if (!hdr) {
> > + kfree_skb(skb);
> > + return -EMSGSIZE;
> > + }
> > +
> > + net = dev_net(nr->cmd->dev);
> > +
> > + nla_put_u32(skb, NCSI_ATTR_IFINDEX, nr->cmd->dev->ifindex);
> > +
> > + if (np)
> > + nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID, np->id);
> > + else
> > + nla_put_u32(skb, NCSI_ATTR_PACKAGE_ID,
> > + NCSI_PACKAGE_INDEX((((struct ncsi_pkt_hdr *)
> > + nr->cmd->data)->channel)));
> > +
> > + if (nc)
> > + nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, nc->id);
> > + else
> > + nla_put_u32(skb, NCSI_ATTR_CHANNEL_ID, NCSI_RESERVED_CHANNEL);
> > +
> > + genlmsg_end(skb, hdr);
> > + return genlmsg_unicast(net, skb, nr->snd_portid);
> > +}
> > +
> > +int ncsi_send_netlink_err(struct net_device *dev,
> > + u32 snd_seq,
> > + u32 snd_portid,
> > + struct nlmsghdr *nlhdr,
> > + int err)
> > +{
> > + struct sk_buff *skb;
> > + struct nlmsghdr *nlh;
> > + struct nlmsgerr *nle;
> > + struct net *net;
> > +
> > + skb = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_ATOMIC);
> > + if (!skb)
> > + return -ENOMEM;
> > +
> > + net = dev_net(dev);
> > +
> > + nlh = nlmsg_put(skb, snd_portid, snd_seq,
> > + NLMSG_ERROR, sizeof(*nle), 0);
> > + nle = (struct nlmsgerr *)nlmsg_data(nlh);
> > + nle->error = err;
> > + memcpy(&nle->msg, nlhdr, sizeof(*nlh));
> > +
> > + nlmsg_end(skb, nlh);
> > +
> > + return nlmsg_unicast(net->genl_sock, skb, snd_portid);
> > +}
> > +
> > static const struct genl_ops ncsi_ops[] = {
> > {
> > .cmd = NCSI_CMD_PKG_INFO,
> > @@ -386,6 +584,12 @@ static const struct genl_ops ncsi_ops[] = {
> > .doit = ncsi_clear_interface_nl,
> > .flags = GENL_ADMIN_PERM,
> > },
> > + {
> > + .cmd = NCSI_CMD_SEND_CMD,
> > + .policy = ncsi_genl_policy,
> > + .doit = ncsi_send_cmd_nl,
> > + .flags = GENL_ADMIN_PERM,
> > + },
> > };
> >
> > static struct genl_family ncsi_genl_family __ro_after_init = {
> > diff --git a/net/ncsi/ncsi-netlink.h b/net/ncsi/ncsi-netlink.h
> > index 91a5c25..c4a4688 100644
> > --- a/net/ncsi/ncsi-netlink.h
> > +++ b/net/ncsi/ncsi-netlink.h
> > @@ -14,6 +14,18 @@
> >
> > #include "internal.h"
> >
> > +int ncsi_send_netlink_rsp(struct ncsi_request *nr,
> > + struct ncsi_package *np,
> > + struct ncsi_channel *nc);
> > +int ncsi_send_netlink_timeout(struct ncsi_request *nr,
> > + struct ncsi_package *np,
> > + struct ncsi_channel *nc);
> > +int ncsi_send_netlink_err(struct net_device *dev,
> > + u32 snd_seq,
> > + u32 snd_portid,
> > + struct nlmsghdr *nlhdr,
> > + int err);
> > +
> > int ncsi_init_netlink(struct net_device *dev);
> > int ncsi_unregister_netlink(struct net_device *dev);
> >
> > diff --git a/net/ncsi/ncsi-rsp.c b/net/ncsi/ncsi-rsp.c
> > index d66b347..dd931d2 100644
> > --- a/net/ncsi/ncsi-rsp.c
> > +++ b/net/ncsi/ncsi-rsp.c
> > @@ -16,9 +16,11 @@
> > #include <net/ncsi.h>
> > #include <net/net_namespace.h>
> > #include <net/sock.h>
> > +#include <net/genetlink.h>
> >
> > #include "internal.h"
> > #include "ncsi-pkt.h"
> > +#include "ncsi-netlink.h"
> >
> > static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
> > unsigned short payload)
> > @@ -32,15 +34,25 @@ static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
> > * before calling this function.
> > */
> > h = (struct ncsi_rsp_pkt_hdr *)skb_network_header(nr->rsp);
> > - if (h->common.revision != NCSI_PKT_REVISION)
> > +
> > + if (h->common.revision != NCSI_PKT_REVISION) {
> > + netdev_dbg(nr->ndp->ndev.dev,
> > + "NCSI: unsupported header revision\n");
> > return -EINVAL;
> > - if (ntohs(h->common.length) != payload)
> > + }
> > + if (ntohs(h->common.length) != payload) {
> > + netdev_dbg(nr->ndp->ndev.dev,
> > + "NCSI: payload length mismatched\n");
> > return -EINVAL;
> > + }
> >
> > /* Check on code and reason */
> > if (ntohs(h->code) != NCSI_PKT_RSP_C_COMPLETED ||
> > - ntohs(h->reason) != NCSI_PKT_RSP_R_NO_ERROR)
> > - return -EINVAL;
> > + ntohs(h->reason) != NCSI_PKT_RSP_R_NO_ERROR) {
> > + netdev_dbg(nr->ndp->ndev.dev,
> > + "NCSI: non zero response/reason code\n");
> > + return -EPERM;
> > + }
> >
> > /* Validate checksum, which might be zeroes if the
> > * sender doesn't support checksum according to NCSI
> > @@ -52,8 +64,11 @@ static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
> >
> > checksum = ncsi_calculate_checksum((unsigned char *)h,
> > sizeof(*h) + payload - 4);
> > - if (*pchecksum != htonl(checksum))
> > +
> > + if (*pchecksum != htonl(checksum)) {
> > + netdev_dbg(nr->ndp->ndev.dev, "NCSI: checksum mismatched\n");
> > return -EINVAL;
> > + }
> >
> > return 0;
> > }
> > @@ -941,6 +956,26 @@ static int ncsi_rsp_handler_gpuuid(struct ncsi_request *nr)
> > return 0;
> > }
> >
> > +static int ncsi_rsp_handler_netlink(struct ncsi_request *nr)
> > +{
> > + struct ncsi_rsp_pkt *rsp;
> > + struct ncsi_dev_priv *ndp = nr->ndp;
> > + struct ncsi_package *np;
> > + struct ncsi_channel *nc;
> > + int ret;
> > +
> > + /* Find the package */
> > + rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
> > + ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
> > + &np, &nc);
> > + if (!np)
> > + return -ENODEV;
> > +
> > + ret = ncsi_send_netlink_rsp(nr, np, nc);
> > +
> > + return ret;
> > +}
> > +
> > static struct ncsi_rsp_handler {
> > unsigned char type;
> > int payload;
> > @@ -1043,6 +1078,17 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
> > netdev_warn(ndp->ndev.dev,
> > "NCSI: 'bad' packet ignored for type 0x%x\n",
> > hdr->type);
> > +
> > + if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
> > + if (ret == -EPERM)
> > + goto out_netlink;
> > + else
> > + ncsi_send_netlink_err(ndp->ndev.dev,
> > + nr->snd_seq,
> > + nr->snd_portid,
> > + &nr->nlhdr,
> > + ret);
> > + }
> > goto out;
> > }
> >
> > @@ -1052,6 +1098,17 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
> > netdev_err(ndp->ndev.dev,
> > "NCSI: Handler for packet type 0x%x returned %d\n",
> > hdr->type, ret);
> > +
> > +out_netlink:
> > + if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
> > + ret = ncsi_rsp_handler_netlink(nr);
> > + if (ret) {
> > + netdev_err(ndp->ndev.dev,
> > + "NCSI: Netlink handler for packet type 0x%x returned %d\n",
> > + hdr->type, ret);
> > + }
> > + }
> > +
> > out:
> > ncsi_free_request(nr);
> > return ret;
> > --
> > 2.9.3
> >
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