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Message-ID: <a2f68c5eb785436ea248cb46b73ea246@AUSX13MPS306.AMER.DELL.COM>
Date: Thu, 27 Sep 2018 21:08:28 +0000
From: <Justin.Lee1@...l.com>
To: <joel@....id.au>, <sam@...dozajonas.com>
CC: <amithash@...com>, <vijaykhemka@...com>,
<linux-aspeed@...ts.ozlabs.org>, <openbmc@...ts.ozlabs.org>,
<sdasari@...com>, <netdev@...r.kernel.org>, <christian@....nu>
Subject: [PATCH net] net/ncsi: Extend NC-SI Netlink interface to allow user
space to send NC-SI command
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>
---
include/uapi/linux/ncsi.h | 3 +
net/ncsi/internal.h | 12 ++-
net/ncsi/ncsi-aen.c | 10 ++-
net/ncsi/ncsi-cmd.c | 106 ++++++++++++++++--------
net/ncsi/ncsi-manage.c | 74 ++++++++++++++---
net/ncsi/ncsi-netlink.c | 199 +++++++++++++++++++++++++++++++++++++++++++++-
net/ncsi/ncsi-netlink.h | 4 +
net/ncsi/ncsi-rsp.c | 70 ++++++++++++++--
8 files changed, 420 insertions(+), 58 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..20ce735 100644
--- a/net/ncsi/internal.h
+++ b/net/ncsi/internal.h
@@ -215,12 +215,17 @@ 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 {
@@ -301,10 +306,13 @@ struct ncsi_cmd_arg {
unsigned short payload; /* Command packet payload length */
unsigned int req_flags; /* NCSI request properties */
union {
- unsigned char bytes[16]; /* Command packet specific data */
+ unsigned char bytes[16]; /* Command packet specific data */
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-aen.c b/net/ncsi/ncsi-aen.c
index 25e483e..b5ec193 100644
--- a/net/ncsi/ncsi-aen.c
+++ b/net/ncsi/ncsi-aen.c
@@ -16,6 +16,7 @@
#include <net/ncsi.h>
#include <net/net_namespace.h>
#include <net/sock.h>
+#include <net/genetlink.h>
#include "internal.h"
#include "ncsi-pkt.h"
@@ -73,8 +74,8 @@ static int ncsi_aen_handler_lsc(struct ncsi_dev_priv *ndp,
ncm->data[2] = data;
ncm->data[4] = ntohl(lsc->oem_status);
- netdev_dbg(ndp->ndev.dev, "NCSI: LSC AEN - channel %u state %s\n",
- nc->id, data & 0x1 ? "up" : "down");
+ netdev_dbg(ndp->ndev.dev, "NCSI: LSC AEN - pkg %u ch %u state %s\n",
+ nc->package->id, nc->id, data & 0x1 ? "up" : "down");
chained = !list_empty(&nc->link);
state = nc->state;
@@ -148,9 +149,10 @@ static int ncsi_aen_handler_hncdsc(struct ncsi_dev_priv *ndp,
hncdsc = (struct ncsi_aen_hncdsc_pkt *)h;
ncm->data[3] = ntohl(hncdsc->status);
spin_unlock_irqrestore(&nc->lock, flags);
+
netdev_dbg(ndp->ndev.dev,
- "NCSI: host driver %srunning on channel %u\n",
- ncm->data[3] & 0x1 ? "" : "not ", nc->id);
+ "NCSI: host driver %srunning on pkg %u ch %u\n",
+ ncm->data[3] & 0x1 ? "" : "not ", nc->package->id, nc->id);
return 0;
}
diff --git a/net/ncsi/ncsi-cmd.c b/net/ncsi/ncsi-cmd.c
index 7567ca63..b291297 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"
@@ -211,42 +212,75 @@ 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;
int (*handler)(struct sk_buff *skb,
struct ncsi_cmd_arg *nca);
} ncsi_cmd_handlers[] = {
- { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_SP, 4, ncsi_cmd_handler_sp },
- { NCSI_PKT_CMD_DP, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_EC, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_DC, 4, ncsi_cmd_handler_dc },
- { NCSI_PKT_CMD_RC, 4, ncsi_cmd_handler_rc },
- { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_AE, 8, ncsi_cmd_handler_ae },
- { NCSI_PKT_CMD_SL, 8, ncsi_cmd_handler_sl },
- { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_SVF, 8, ncsi_cmd_handler_svf },
- { NCSI_PKT_CMD_EV, 4, ncsi_cmd_handler_ev },
- { NCSI_PKT_CMD_DV, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_handler_sma },
- { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_handler_ebf },
- { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_handler_egmf },
- { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_handler_snfc },
- { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_GC, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_GP, 0, ncsi_cmd_handler_default },
- { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_handler_default },
- { 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_PLDM, 0, NULL },
- { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
+ { NCSI_PKT_CMD_CIS, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_SP, 4, ncsi_cmd_handler_sp },
+ { NCSI_PKT_CMD_DP, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_EC, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_DC, 4, ncsi_cmd_handler_dc },
+ { NCSI_PKT_CMD_RC, 4, ncsi_cmd_handler_rc },
+ { NCSI_PKT_CMD_ECNT, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_DCNT, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_AE, 8, ncsi_cmd_handler_ae },
+ { NCSI_PKT_CMD_SL, 8, ncsi_cmd_handler_sl },
+ { NCSI_PKT_CMD_GLS, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_SVF, 8, ncsi_cmd_handler_svf },
+ { NCSI_PKT_CMD_EV, 4, ncsi_cmd_handler_ev },
+ { NCSI_PKT_CMD_DV, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_SMA, 8, ncsi_cmd_handler_sma },
+ { NCSI_PKT_CMD_EBF, 4, ncsi_cmd_handler_ebf },
+ { NCSI_PKT_CMD_DBF, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_EGMF, 4, ncsi_cmd_handler_egmf },
+ { NCSI_PKT_CMD_DGMF, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_SNFC, 4, ncsi_cmd_handler_snfc },
+ { NCSI_PKT_CMD_GVI, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_GC, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_GP, 0, ncsi_cmd_handler_default },
+ { NCSI_PKT_CMD_GCPS, 0, ncsi_cmd_handler_default },
+ { 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, -1, ncsi_cmd_handler_oem },
+ { NCSI_PKT_CMD_PLDM, 0, NULL },
+ { NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
};
static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
@@ -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);
@@ -341,6 +384,7 @@ int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
* connection a 1 second delay should be sufficient.
*/
nr->enabled = true;
+
mod_timer(&nr->timer, jiffies + 1 * HZ);
/* Send NCSI packet */
diff --git a/net/ncsi/ncsi-manage.c b/net/ncsi/ncsi-manage.c
index 0912847..6629103 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"
@@ -110,8 +111,9 @@ static void ncsi_channel_monitor(struct timer_list *t)
case NCSI_CHANNEL_MONITOR_WAIT ... NCSI_CHANNEL_MONITOR_WAIT_MAX:
break;
default:
- netdev_err(ndp->ndev.dev, "NCSI Channel %d timed out!\n",
- nc->id);
+ netdev_err(ndp->ndev.dev, "NCSI: pkg %u ch %u timed out!\n",
+ np->id, nc->id);
+
if (!(ndp->flags & NCSI_DEV_HWA)) {
ncsi_report_link(ndp, true);
ndp->flags |= NCSI_DEV_RESHUFFLE;
@@ -143,6 +145,10 @@ void ncsi_start_channel_monitor(struct ncsi_channel *nc)
{
unsigned long flags;
+ netdev_dbg(nc->package->ndp->ndev.dev,
+ "NCSI: %s pkg %u ch %u\n",
+ __func__, nc->package->id, nc->id);
+
spin_lock_irqsave(&nc->lock, flags);
WARN_ON_ONCE(nc->monitor.enabled);
nc->monitor.enabled = true;
@@ -156,6 +162,10 @@ void ncsi_stop_channel_monitor(struct ncsi_channel *nc)
{
unsigned long flags;
+ netdev_dbg(nc->package->ndp->ndev.dev,
+ "NCSI: %s pkg %u ch %u\n",
+ __func__, nc->package->id, nc->id);
+
spin_lock_irqsave(&nc->lock, flags);
if (!nc->monitor.enabled) {
spin_unlock_irqrestore(&nc->lock, flags);
@@ -406,8 +416,13 @@ 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 +430,23 @@ 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);
}
@@ -432,6 +460,10 @@ static void ncsi_suspend_channel(struct ncsi_dev_priv *ndp)
unsigned long flags;
int ret;
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: %s pkg %u ch %u state %04x\n",
+ __func__, np->id, nc->id, nd->state);
+
nca.ndp = ndp;
nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
switch (nd->state) {
@@ -647,6 +679,10 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
unsigned long flags;
int ret;
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: %s pkg %u ch %u state %04x\n",
+ __func__, np->id, nc->id, nd->state);
+
nca.ndp = ndp;
nca.req_flags = NCSI_REQ_FLAG_EVENT_DRIVEN;
switch (nd->state) {
@@ -788,8 +824,9 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
}
break;
case ncsi_dev_state_config_done:
- netdev_dbg(ndp->ndev.dev, "NCSI: channel %u config done\n",
- nc->id);
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: pkg %u ch %u config done\n",
+ nc->package->id, nc->id);
spin_lock_irqsave(&nc->lock, flags);
if (nc->reconfigure_needed) {
/* This channel's configuration has been updated
@@ -815,9 +852,10 @@ static void ncsi_configure_channel(struct ncsi_dev_priv *ndp)
} else {
hot_nc = NULL;
nc->state = NCSI_CHANNEL_INACTIVE;
+
netdev_dbg(ndp->ndev.dev,
- "NCSI: channel %u link down after config\n",
- nc->id);
+ "NCSI: pkg %u ch %u link down after config\n",
+ nc->package->id, nc->id);
}
spin_unlock_irqrestore(&nc->lock, flags);
@@ -853,6 +891,8 @@ static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
force_package = ndp->force_package;
spin_unlock_irqrestore(&ndp->lock, flags);
+ netdev_dbg(ndp->ndev.dev, "NCSI: %s\n", __func__);
+
/* Force a specific channel whether or not it has link if we have been
* configured to do so
*/
@@ -861,8 +901,8 @@ static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
ncm = &found->modes[NCSI_MODE_LINK];
if (!(ncm->data[2] & 0x1))
netdev_info(ndp->ndev.dev,
- "NCSI: Channel %u forced, but it is link down\n",
- found->id);
+ "NCSI: pkg %u ch %u forced, but it is link down\n",
+ found->package->id, found->id);
goto out;
}
@@ -914,6 +954,7 @@ static int ncsi_choose_active_channel(struct ncsi_dev_priv *ndp)
out:
spin_lock_irqsave(&ndp->lock, flags);
list_add_tail_rcu(&found->link, &ndp->channel_queue);
+
spin_unlock_irqrestore(&ndp->lock, flags);
return ncsi_process_next_channel(ndp);
@@ -1154,6 +1195,8 @@ static void ncsi_dev_work(struct work_struct *work)
struct ncsi_dev_priv, work);
struct ncsi_dev *nd = &ndp->ndev;
+ netdev_dbg(ndp->ndev.dev, "NCSI: %s\n", __func__);
+
switch (nd->state & ncsi_dev_state_major) {
case ncsi_dev_state_probe:
ncsi_probe_channel(ndp);
@@ -1176,6 +1219,8 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
int old_state;
unsigned long flags;
+ netdev_dbg(ndp->ndev.dev, "NCSI: %s\n", __func__);
+
spin_lock_irqsave(&ndp->lock, flags);
nc = list_first_or_null_rcu(&ndp->channel_queue,
struct ncsi_channel, link);
@@ -1198,14 +1243,14 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
switch (old_state) {
case NCSI_CHANNEL_INACTIVE:
ndp->ndev.state = ncsi_dev_state_config;
- netdev_dbg(ndp->ndev.dev, "NCSI: configuring channel %u\n",
- nc->id);
+ netdev_dbg(ndp->ndev.dev, "NCSI: configuring pkg %u ch %u\n",
+ nc->package->id, nc->id);
ncsi_configure_channel(ndp);
break;
case NCSI_CHANNEL_ACTIVE:
ndp->ndev.state = ncsi_dev_state_suspend;
- netdev_dbg(ndp->ndev.dev, "NCSI: suspending channel %u\n",
- nc->id);
+ netdev_dbg(ndp->ndev.dev, "NCSI: suspending pkg %u ch %u\n",
+ nc->package->id, nc->id);
ncsi_suspend_channel(ndp);
break;
default:
@@ -1225,6 +1270,9 @@ int ncsi_process_next_channel(struct ncsi_dev_priv *ndp)
return ncsi_choose_active_channel(ndp);
}
+ netdev_dbg(ndp->ndev.dev,
+ "NCSI: No more channels to process\n");
+
ncsi_report_link(ndp, false);
return -ENODEV;
}
@@ -1475,6 +1523,7 @@ struct ncsi_dev *ncsi_register_dev(struct net_device *dev,
if (list_empty(&ncsi_dev_list))
register_inet6addr_notifier(&ncsi_inet6addr_notifier);
#endif
+
list_add_tail_rcu(&ndp->node, &ncsi_dev_list);
spin_unlock_irqrestore(&ncsi_dev_lock, flags);
@@ -1564,6 +1613,7 @@ void ncsi_unregister_dev(struct ncsi_dev *nd)
if (list_empty(&ncsi_dev_list))
unregister_inet6addr_notifier(&ncsi_inet6addr_notifier);
#endif
+
spin_unlock_irqrestore(&ncsi_dev_lock, flags);
ncsi_unregister_netlink(nd->dev);
diff --git a/net/ncsi/ncsi-netlink.c b/net/ncsi/ncsi-netlink.c
index 45f33d6..ab1a959 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)
@@ -240,7 +242,7 @@ static int ncsi_pkg_info_all_nl(struct sk_buff *skb,
return 0; /* done */
hdr = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
- &ncsi_genl_family, NLM_F_MULTI, NCSI_CMD_PKG_INFO);
+ &ncsi_genl_family, NLM_F_MULTI, NCSI_CMD_PKG_INFO);
if (!hdr) {
rc = -EMSGSIZE;
goto err;
@@ -316,8 +318,8 @@ static int ncsi_set_interface_nl(struct sk_buff *msg, struct genl_info *info)
* package
*/
spin_unlock_irqrestore(&ndp->lock, flags);
- netdev_info(ndp->ndev.dev, "NCSI: Channel %u does not exist!\n",
- channel_id);
+ netdev_info(ndp->ndev.dev, "NCSI: pkg %u ch %u does not exist!\n",
+ package_id, channel_id);
return -ERANGE;
}
@@ -366,6 +368,191 @@ 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 & ~0x07) || (channel_id & ~0x1f)) {
+ 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 +573,12 @@ 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..dadaf32 100644
--- a/net/ncsi/ncsi-netlink.h
+++ b/net/ncsi/ncsi-netlink.h
@@ -14,6 +14,10 @@
#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..bdf9519 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 }
};
@@ -950,6 +987,7 @@ int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
/* Find the NCSI device */
nd = ncsi_find_dev(dev);
+
ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
if (!ndp)
return -ENODEV;
@@ -1002,6 +1040,15 @@ 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 +1058,17 @@ 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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