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Message-ID: <18e571bb7c5879a12754b1df20f51fd87ea48712.camel@mendozajonas.com>
Date: Tue, 02 Oct 2018 15:11:27 +1000
From: Samuel Mendoza-Jonas <sam@...dozajonas.com>
To: Justin.Lee1@...l.com, joel@....id.au
Cc: linux-aspeed@...ts.ozlabs.org, netdev@...r.kernel.org,
openbmc@...ts.ozlabs.org, amithash@...com, christian@....nu,
vijaykhemka@...com
Subject: Re: [PATCH net v2] net/ncsi: Extend NC-SI Netlink interface to
allow user space to send NC-SI command
On Fri, 2018-09-28 at 18:15 +0000, Justin.Lee1@...l.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
>
>
> Signed-off-by: Justin Lee <justin.lee1@...l.com>
Hi Justin,
This is looking pretty good, combined with Vijay's base patch the two
approaches should fit together nicely (
http://patchwork.ozlabs.org/patch/976510/).
A good merge order would probably be the above patch first, then this
patch and Vijay's further OEM patches based on top of that to reduce
conflicts.
Cheers,
Sam
>
> ---
> include/uapi/linux/ncsi.h | 3 +
> net/ncsi/internal.h | 12 ++-
> net/ncsi/ncsi-cmd.c | 47 ++++++++++-
> net/ncsi/ncsi-manage.c | 22 +++++
> net/ncsi/ncsi-netlink.c | 205 ++++++++++++++++++++++++++++++++++++++++++++++
> net/ncsi/ncsi-netlink.h | 12 +++
> net/ncsi/ncsi-rsp.c | 71 ++++++++++++++--
> 7 files changed, 363 insertions(+), 9 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 8055e39..1a3ef9e 100644
> --- a/net/ncsi/internal.h
> +++ b/net/ncsi/internal.h
> @@ -171,6 +171,8 @@ 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;
> @@ -215,12 +217,17 @@ 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 {
> @@ -305,6 +312,9 @@ struct ncsi_cmd_arg {
> unsigned short words[8];
> unsigned int dwords[4];
> };
> +
> + unsigned char *data; /* Netlink 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 7567ca63..43b544c 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"
> @@ -211,6 +212,39 @@ static int ncsi_cmd_handler_snfc(struct sk_buff *skb,
> return 0;
> }
>
> +static int ncsi_cmd_handler_oem(struct sk_buff *skb,
> + struct ncsi_cmd_arg *nca)
> +{
> + struct ncsi_cmd_pkt *cmd;
> + unsigned char *dest, *source;
> + unsigned short len;
> +
> + /* struct ncsi_cmd_pkt = minimum length
> + * - frame checksum
> + * - Ethernet header
> + * = 64 - 4 - 14 = 46
> + * minimum payload = 46 - ncsi header - ncsi checksum
> + * = 46 - 16 - 4 = 26
> + */
> + len = nca->payload;
> +
> + /* minimum payload length is 26 bytes to meet minimum packet
> + * length 64
> + */
> + if (len < 26)
> + cmd = skb_put_zero(skb, sizeof(*cmd));
> + else
> + cmd = skb_put_zero(skb, len + sizeof(struct ncsi_pkt_hdr) + 4);
> +
> + dest = (unsigned char *)cmd + sizeof(struct ncsi_pkt_hdr);
> + source = (unsigned char *)nca->data + sizeof(struct ncsi_pkt_hdr);
> + memcpy(dest, source, len);
> +
> + ncsi_cmd_build_header(&cmd->cmd.common, nca);
> +
> + return 0;
> +}
> +
> static struct ncsi_cmd_handler {
> unsigned char type;
> int payload;
> @@ -244,7 +278,7 @@ static struct ncsi_cmd_handler {
> { NCSI_PKT_CMD_GNS, 0, ncsi_cmd_handler_default },
> { NCSI_PKT_CMD_GNPTS, 0, ncsi_cmd_handler_default },
> { NCSI_PKT_CMD_GPS, 0, ncsi_cmd_handler_default },
> - { NCSI_PKT_CMD_OEM, 0, NULL },
> + { NCSI_PKT_CMD_OEM, -1, ncsi_cmd_handler_oem },
> { NCSI_PKT_CMD_PLDM, 0, NULL },
> { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
> };
> @@ -317,11 +351,20 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
> }
>
> /* Get packet payload length and allocate the request */
> - nca->payload = nch->payload;
> + if (nch->payload >= 0)
> + nca->payload = nch->payload;
> +
> nr = ncsi_alloc_command(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..29f33a1 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"
> @@ -406,8 +407,13 @@ 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;
>
> + netdev_dbg(ndp->ndev.dev, "NCSI: %s\n", __func__);
> +
> /* If the request already had associated response,
> * let the response handler to release it.
> */
> @@ -415,10 +421,26 @@ static void ncsi_request_timeout(struct timer_list *t)
> nr->enabled = false;
> if (nr->rsp || !nr->cmd) {
> spin_unlock_irqrestore(&ndp->lock, flags);
> +
> + netdev_dbg(ndp->ndev.dev,
> + "NCSI: %s - early return\n", __func__);
> +
> return;
> }
> 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..ce57675 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 +368,203 @@ 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;
> + void *head;
> + 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);
> + ret = -EINVAL;
> + goto out_netlink;
> + } else {
> + head = nla_data(info->attrs[NCSI_ATTR_DATA]);
> + data = (unsigned char *)head;
> + }
> +
> + 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;
> +
> + ret = ncsi_xmit_cmd(&nca);
> +out_netlink:
> + if (ret != 0) {
> + netdev_err(ndp->ndev.dev,
> + "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__);
> +
> + 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__);
> +
> + 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 +585,12 @@ 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 930c1d3..010970f 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 +34,22 @@ 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 +61,11 @@ 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;
> }
> @@ -900,6 +912,31 @@ static int ncsi_rsp_handler_gpuuid(struct ncsi_request *nr)
> return 0;
> }
>
> +static int ncsi_rsp_handler_oem(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;
> @@ -932,7 +969,7 @@ static struct ncsi_rsp_handler {
> { NCSI_PKT_RSP_GNS, 172, ncsi_rsp_handler_gns },
> { NCSI_PKT_RSP_GNPTS, 172, ncsi_rsp_handler_gnpts },
> { NCSI_PKT_RSP_GPS, 8, ncsi_rsp_handler_gps },
> - { NCSI_PKT_RSP_OEM, 0, NULL },
> + { NCSI_PKT_RSP_OEM, -1, ncsi_rsp_handler_oem },
> { NCSI_PKT_RSP_PLDM, 0, NULL },
> { NCSI_PKT_RSP_GPUUID, 20, ncsi_rsp_handler_gpuuid }
> };
> @@ -1002,6 +1039,17 @@ 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;
> }
>
> @@ -1011,6 +1059,17 @@ 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;
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