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platform: implement infiniband properties as lnk data

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But keep the fallback to reading sysfs to support pre-3.7 kernels.
This commit is contained in:
Thomas Haller
2015-10-15 15:47:14 +02:00
parent 07550f8dae
commit 90ff0c466d
7 changed files with 187 additions and 226 deletions
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261
src/platform/nm-linux-platform.c
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@@ -935,6 +935,66 @@ _parse_lnk_gre (const char *kind, struct nlattr *info_data)
/*****************************************************************************/
/* IFLA_IPOIB_* were introduced in the 3.7 kernel, but the kernel headers
* we're building against might not have those properties even though the
* running kernel might.
*/
#define IFLA_IPOIB_UNSPEC 0
#define IFLA_IPOIB_PKEY 1
#define IFLA_IPOIB_MODE 2
#define IFLA_IPOIB_UMCAST 3
#undef IFLA_IPOIB_MAX
#define IFLA_IPOIB_MAX IFLA_IPOIB_UMCAST
#define IPOIB_MODE_DATAGRAM 0 /* using unreliable datagram QPs */
#define IPOIB_MODE_CONNECTED 1 /* using connected QPs */
static NMPObject *
_parse_lnk_infiniband (const char *kind, struct nlattr *info_data)
{
static struct nla_policy policy[IFLA_IPOIB_MAX + 1] = {
[IFLA_IPOIB_PKEY] = { .type = NLA_U16 },
[IFLA_IPOIB_MODE] = { .type = NLA_U16 },
[IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
};
struct nlattr *tb[IFLA_IPOIB_MAX + 1];
NMPlatformLnkInfiniband *info;
NMPObject *obj;
int err;
const char *mode;
if (!info_data || g_strcmp0 (kind, "ipoib"))
return NULL;
err = nla_parse_nested (tb, IFLA_IPOIB_MAX, info_data, policy);
if (err < 0)
return NULL;
if (!tb[IFLA_IPOIB_PKEY] || !tb[IFLA_IPOIB_MODE])
return NULL;
switch (nla_get_u16 (tb[IFLA_IPOIB_MODE])) {
case IPOIB_MODE_DATAGRAM:
mode = "datagram";
break;
case IPOIB_MODE_CONNECTED:
mode = "connected";
break;
default:
return NULL;
}
obj = nmp_object_new (NMP_OBJECT_TYPE_LNK_INFINIBAND, NULL);
info = &obj->lnk_infiniband;
info->p_key = nla_get_u16 (tb[IFLA_IPOIB_PKEY]);
info->mode = mode;
return obj;
}
/*****************************************************************************/
static NMPObject *
_parse_lnk_macvlan (const char *kind, struct nlattr *info_data)
{
@@ -1284,6 +1344,9 @@ _new_from_nl_link (NMPlatform *platform, const NMPCache *cache, struct nlmsghdr
case NM_LINK_TYPE_GRE:
lnk_data = _parse_lnk_gre (nl_info_kind, nl_info_data);
break;
case NM_LINK_TYPE_INFINIBAND:
lnk_data = _parse_lnk_infiniband (nl_info_kind, nl_info_data);
break;
case NM_LINK_TYPE_MACVLAN:
lnk_data = _parse_lnk_macvlan (nl_info_kind, nl_info_data);
break;
@@ -1668,90 +1731,6 @@ nmp_object_new_from_nl (NMPlatform *platform, const NMPCache *cache, struct nl_m
/******************************************************************/
/* _nl_link_parse_info_data(): Re-fetches a link from the kernel
* and parses its IFLA_INFO_DATA using a caller-provided parser.
*
* Code is stolen from rtnl_link_get_kernel(), nl_pickup(), and link_msg_parser().
*/
typedef int (*NMNLInfoDataParser) (struct nlattr *info_data, gpointer parser_data);
typedef struct {
NMNLInfoDataParser parser;
gpointer parser_data;
} NMNLInfoDataClosure;
static struct nla_policy info_data_link_policy[IFLA_MAX + 1] = {
[IFLA_LINKINFO] = { .type = NLA_NESTED },
};
static struct nla_policy info_data_link_info_policy[IFLA_INFO_MAX + 1] = {
[IFLA_INFO_DATA] = { .type = NLA_NESTED },
};
static int
_nl_link_parse_info_data_cb (struct nl_msg *msg, void *arg)
{
NMNLInfoDataClosure *closure = arg;
struct nlmsghdr *n = nlmsg_hdr (msg);
struct nlattr *tb[IFLA_MAX + 1];
struct nlattr *li[IFLA_INFO_MAX + 1];
int err;
if (!nlmsg_valid_hdr (n, sizeof (struct ifinfomsg)))
return -NLE_MSG_TOOSHORT;
err = nlmsg_parse (n, sizeof (struct ifinfomsg), tb, IFLA_MAX, info_data_link_policy);
if (err < 0)
return err;
if (!tb[IFLA_LINKINFO])
return -NLE_MISSING_ATTR;
err = nla_parse_nested (li, IFLA_INFO_MAX, tb[IFLA_LINKINFO], info_data_link_info_policy);
if (err < 0)
return err;
if (!li[IFLA_INFO_DATA])
return -NLE_MISSING_ATTR;
return closure->parser (li[IFLA_INFO_DATA], closure->parser_data);
}
static int
_nl_link_parse_info_data (struct nl_sock *sk, int ifindex,
NMNLInfoDataParser parser, gpointer parser_data)
{
NMNLInfoDataClosure data = { .parser = parser, .parser_data = parser_data };
struct nl_msg *msg = NULL;
struct nl_cb *cb;
int err;
err = rtnl_link_build_get_request (ifindex, NULL, &msg);
if (err < 0)
return err;
err = nl_send_auto (sk, msg);
nlmsg_free (msg);
if (err < 0)
return err;
cb = nl_cb_clone (nl_socket_get_cb (sk));
if (cb == NULL)
return -NLE_NOMEM;
nl_cb_set (cb, NL_CB_VALID, NL_CB_CUSTOM, _nl_link_parse_info_data_cb, &data);
err = nl_recvmsgs (sk, cb);
nl_cb_put (cb);
if (err < 0)
return err;
nl_wait_for_ack (sk);
return 0;
}
/******************************************************************/
static int
_nl_sock_flush_data (struct nl_sock *sk)
{
@@ -3277,6 +3256,10 @@ link_get_lnk (NMPlatform *platform, int ifindex, NMLinkType link_type, const NMP
if (NMP_OBJECT_GET_TYPE (obj->_link.netlink.lnk) == NMP_OBJECT_TYPE_LNK_GRE)
return &obj->_link.netlink.lnk->lnk_gre;
break;
case NM_LINK_TYPE_INFINIBAND:
if (NMP_OBJECT_GET_TYPE (obj->_link.netlink.lnk) == NMP_OBJECT_TYPE_LNK_INFINIBAND)
return &obj->_link.netlink.lnk->lnk_infiniband;
break;
case NM_LINK_TYPE_MACVLAN:
if (NMP_OBJECT_GET_TYPE (obj->_link.netlink.lnk) == NMP_OBJECT_TYPE_LNK_MACVLAN)
return &obj->_link.netlink.lnk->lnk_macvlan;
@@ -3978,115 +3961,6 @@ infiniband_partition_add (NMPlatform *platform, int parent, int p_key, NMPlatfor
return !!obj;
}
typedef struct {
int p_key;
const char *mode;
} IpoibInfo;
/* IFLA_IPOIB_* were introduced in the 3.7 kernel, but the kernel headers
* we're building against might not have those properties even though the
* running kernel might.
*/
#define IFLA_IPOIB_UNSPEC 0
#define IFLA_IPOIB_PKEY 1
#define IFLA_IPOIB_MODE 2
#define IFLA_IPOIB_UMCAST 3
#undef IFLA_IPOIB_MAX
#define IFLA_IPOIB_MAX IFLA_IPOIB_UMCAST
#define IPOIB_MODE_DATAGRAM 0 /* using unreliable datagram QPs */
#define IPOIB_MODE_CONNECTED 1 /* using connected QPs */
static const struct nla_policy infiniband_info_policy[IFLA_IPOIB_MAX + 1] = {
[IFLA_IPOIB_PKEY] = { .type = NLA_U16 },
[IFLA_IPOIB_MODE] = { .type = NLA_U16 },
[IFLA_IPOIB_UMCAST] = { .type = NLA_U16 },
};
static int
infiniband_info_data_parser (struct nlattr *info_data, gpointer parser_data)
{
IpoibInfo *info = parser_data;
struct nlattr *tb[IFLA_MACVLAN_MAX + 1];
int err;
err = nla_parse_nested (tb, IFLA_IPOIB_MAX, info_data,
(struct nla_policy *) infiniband_info_policy);
if (err < 0)
return err;
if (!tb[IFLA_IPOIB_PKEY] || !tb[IFLA_IPOIB_MODE])
return -EINVAL;
info->p_key = nla_get_u16 (tb[IFLA_IPOIB_PKEY]);
switch (nla_get_u16 (tb[IFLA_IPOIB_MODE])) {
case IPOIB_MODE_DATAGRAM:
info->mode = "datagram";
break;
case IPOIB_MODE_CONNECTED:
info->mode = "connected";
break;
default:
return -NLE_PARSE_ERR;
}
return 0;
}
static gboolean
infiniband_get_info (NMPlatform *platform, int ifindex, int *parent, int *p_key, const char **mode)
{
NMLinuxPlatformPrivate *priv = NM_LINUX_PLATFORM_GET_PRIVATE (platform);
const NMPObject *obj;
IpoibInfo info = { -1, NULL };
obj = cache_lookup_link (platform, ifindex);
if (!obj)
return FALSE;
if (parent)
*parent = obj->link.parent;
if (_nl_link_parse_info_data (priv->nlh,
ifindex,
infiniband_info_data_parser,
&info) != 0) {
const char *iface = obj->link.name;
char *path, *contents = NULL;
/* Fall back to reading sysfs */
path = g_strdup_printf ("/sys/class/net/%s/mode", ASSERT_VALID_PATH_COMPONENT (iface));
contents = nm_platform_sysctl_get (platform, path);
g_free (path);
if (!contents)
return FALSE;
if (strstr (contents, "datagram"))
info.mode = "datagram";
else if (strstr (contents, "connected"))
info.mode = "connected";
g_free (contents);
path = g_strdup_printf ("/sys/class/net/%s/pkey", ASSERT_VALID_PATH_COMPONENT (iface));
contents = nm_platform_sysctl_get (platform, path);
g_free (path);
if (!contents)
return FALSE;
info.p_key = (int) _nm_utils_ascii_str_to_int64 (contents, 16, 0, 0xFFFF, -1);
g_free (contents);
if (info.p_key < 0)
return FALSE;
}
if (p_key)
*p_key = info.p_key;
if (mode)
*mode = info.mode;
return TRUE;
}
/******************************************************************/
static gboolean
@@ -5335,7 +5209,6 @@ nm_linux_platform_class_init (NMLinuxPlatformClass *klass)
platform_class->vlan_set_egress_map = vlan_set_egress_map;
platform_class->infiniband_partition_add = infiniband_partition_add;
platform_class->infiniband_get_info = infiniband_get_info;
platform_class->veth_get_properties = veth_get_properties;