net/smc: Add support for obtaining SMCD device list (aaf95523) · Commits · EulixOS / Software / Kernel

include/uapi/linux/smc.h

+28 −0

Original line number	Diff line number	Diff line
		@@ -37,12 +37,15 @@ enum { /* SMC PNET Table commands */
		#define SMC_GENL_FAMILY_NAME "SMC_GEN_NETLINK"
		#define SMC_GENL_FAMILY_VERSION 1

		#define SMC_PCI_ID_STR_LEN 16 /* Max length of pci id string */

		/* SMC_GENL_FAMILY commands */
		enum {
		SMC_NETLINK_GET_SYS_INFO = 1,
		SMC_NETLINK_GET_LGR_SMCR,
		SMC_NETLINK_GET_LINK_SMCR,
		SMC_NETLINK_GET_LGR_SMCD,
		SMC_NETLINK_GET_DEV_SMCD,
		};

		/* SMC_GENL_FAMILY top level attributes */
		@@ -52,6 +55,7 @@ enum {
		SMC_GEN_LGR_SMCR, /* nest */
		SMC_GEN_LINK_SMCR, /* nest */
		SMC_GEN_LGR_SMCD, /* nest */
		SMC_GEN_DEV_SMCD, /* nest */
		__SMC_GEN_MAX,
		SMC_GEN_MAX = __SMC_GEN_MAX - 1
		};
		@@ -122,4 +126,28 @@ enum {
		__SMC_NLA_LGR_D_MAX,
		SMC_NLA_LGR_D_MAX = __SMC_NLA_LGR_D_MAX - 1
		};

		/* SMC_NLA_DEV_PORT attributes */
		enum {
		SMC_NLA_DEV_PORT_UNSPEC,
		SMC_NLA_DEV_PORT_PNET_USR, /* u8 */
		SMC_NLA_DEV_PORT_PNETID, /* string */
		__SMC_NLA_DEV_PORT_MAX,
		SMC_NLA_DEV_PORT_MAX = __SMC_NLA_DEV_PORT_MAX - 1
		};

		/* SMC_GEN_DEV_SMCD attributes */
		enum {
		SMC_NLA_DEV_UNSPEC,
		SMC_NLA_DEV_USE_CNT, /* u32 */
		SMC_NLA_DEV_IS_CRIT, /* u8 */
		SMC_NLA_DEV_PCI_FID, /* u32 */
		SMC_NLA_DEV_PCI_CHID, /* u16 */
		SMC_NLA_DEV_PCI_VENDOR, /* u16 */
		SMC_NLA_DEV_PCI_DEVICE, /* u16 */
		SMC_NLA_DEV_PCI_ID, /* string */
		SMC_NLA_DEV_PORT, /* nest */
		__SMC_NLA_DEV_MAX,
		SMC_NLA_DEV_MAX = __SMC_NLA_DEV_MAX - 1
		};
		#endif /* _UAPI_LINUX_SMC_H */

net/smc/smc_core.h

+28 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,8 @@
		#define _SMC_CORE_H

		#include <linux/atomic.h>
		#include <linux/smc.h>
		#include <linux/pci.h>
		#include <rdma/ib_verbs.h>
		#include <net/genetlink.h>

		@@ -380,6 +382,32 @@ static inline void smc_gid_be16_convert(__u8 buf, u8 gid_raw)
		be16_to_cpu(((__be16 *)gid_raw)[7]));
		}

		struct smc_pci_dev {
		__u32 pci_fid;
		__u16 pci_pchid;
		__u16 pci_vendor;
		__u16 pci_device;
		__u8 pci_id[SMC_PCI_ID_STR_LEN];
		};

		static inline void smc_set_pci_values(struct pci_dev *pci_dev,
		struct smc_pci_dev *smc_dev)
		{
		smc_dev->pci_vendor = pci_dev->vendor;
		smc_dev->pci_device = pci_dev->device;
		snprintf(smc_dev->pci_id, sizeof(smc_dev->pci_id), "%s",
		pci_name(pci_dev));
		#if IS_ENABLED(CONFIG_S390)
		{ /* Set s390 specific PCI information */
		struct zpci_dev *zdev;

		zdev = to_zpci(pci_dev);
		smc_dev->pci_fid = zdev->fid;
		smc_dev->pci_pchid = zdev->pchid;
		}
		#endif
		}

		struct smc_sock;
		struct smc_clc_msg_accept_confirm;
		struct smc_clc_msg_local;

net/smc/smc_ism.c

+91 −0

Original line number	Diff line number	Diff line
		@@ -15,6 +15,7 @@
		#include "smc_core.h"
		#include "smc_ism.h"
		#include "smc_pnet.h"
		#include "smc_netlink.h"

		struct smcd_dev_list smcd_dev_list = {
		.list = LIST_HEAD_INIT(smcd_dev_list.list),
		@@ -207,6 +208,96 @@ int smc_ism_register_dmb(struct smc_link_group *lgr, int dmb_len,
		return rc;
		}

		static int smc_nl_handle_smcd_dev(struct smcd_dev *smcd,
		struct sk_buff *skb,
		struct netlink_callback *cb)
		{
		char smc_pnet[SMC_MAX_PNETID_LEN + 1];
		struct smc_pci_dev smc_pci_dev;
		struct nlattr *port_attrs;
		struct nlattr *attrs;
		int use_cnt = 0;
		void *nlh;

		nlh = genlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
		&smc_gen_nl_family, NLM_F_MULTI,
		SMC_NETLINK_GET_DEV_SMCD);
		if (!nlh)
		goto errmsg;
		attrs = nla_nest_start(skb, SMC_GEN_DEV_SMCD);
		if (!attrs)
		goto errout;
		use_cnt = atomic_read(&smcd->lgr_cnt);
		if (nla_put_u32(skb, SMC_NLA_DEV_USE_CNT, use_cnt))
		goto errattr;
		if (nla_put_u8(skb, SMC_NLA_DEV_IS_CRIT, use_cnt > 0))
		goto errattr;
		memset(&smc_pci_dev, 0, sizeof(smc_pci_dev));
		smc_set_pci_values(to_pci_dev(smcd->dev.parent), &smc_pci_dev);
		if (nla_put_u32(skb, SMC_NLA_DEV_PCI_FID, smc_pci_dev.pci_fid))
		goto errattr;
		if (nla_put_u16(skb, SMC_NLA_DEV_PCI_CHID, smc_pci_dev.pci_pchid))
		goto errattr;
		if (nla_put_u16(skb, SMC_NLA_DEV_PCI_VENDOR, smc_pci_dev.pci_vendor))
		goto errattr;
		if (nla_put_u16(skb, SMC_NLA_DEV_PCI_DEVICE, smc_pci_dev.pci_device))
		goto errattr;
		if (nla_put_string(skb, SMC_NLA_DEV_PCI_ID, smc_pci_dev.pci_id))
		goto errattr;

		port_attrs = nla_nest_start(skb, SMC_NLA_DEV_PORT);
		if (!port_attrs)
		goto errattr;
		if (nla_put_u8(skb, SMC_NLA_DEV_PORT_PNET_USR, smcd->pnetid_by_user))
		goto errportattr;
		snprintf(smc_pnet, sizeof(smc_pnet), "%s", smcd->pnetid);
		if (nla_put_string(skb, SMC_NLA_DEV_PORT_PNETID, smc_pnet))
		goto errportattr;

		nla_nest_end(skb, port_attrs);
		nla_nest_end(skb, attrs);
		genlmsg_end(skb, nlh);
		return 0;

		errportattr:
		nla_nest_cancel(skb, port_attrs);
		errattr:
		nla_nest_cancel(skb, attrs);
		errout:
		nlmsg_cancel(skb, nlh);
		errmsg:
		return -EMSGSIZE;
		}

		static void smc_nl_prep_smcd_dev(struct smcd_dev_list *dev_list,
		struct sk_buff *skb,
		struct netlink_callback *cb)
		{
		struct smc_nl_dmp_ctx *cb_ctx = smc_nl_dmp_ctx(cb);
		int snum = cb_ctx->pos[0];
		struct smcd_dev *smcd;
		int num = 0;

		mutex_lock(&dev_list->mutex);
		list_for_each_entry(smcd, &dev_list->list, list) {
		if (num < snum)
		goto next;
		if (smc_nl_handle_smcd_dev(smcd, skb, cb))
		goto errout;
		next:
		num++;
		}
		errout:
		mutex_unlock(&dev_list->mutex);
		cb_ctx->pos[0] = num;
		}

		int smcd_nl_get_device(struct sk_buff skb, struct netlink_callback cb)
		{
		smc_nl_prep_smcd_dev(&smcd_dev_list, skb, cb);
		return skb->len;
		}

		struct smc_ism_event_work {
		struct work_struct work;
		struct smcd_dev *smcd;

net/smc/smc_ism.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -52,4 +52,5 @@ void smc_ism_get_system_eid(struct smcd_dev dev, u8 *eid);
		u16 smc_ism_get_chid(struct smcd_dev *dev);
		bool smc_ism_is_v2_capable(void);
		void smc_ism_init(void);
		int smcd_nl_get_device(struct sk_buff skb, struct netlink_callback cb);
		#endif

net/smc/smc_netlink.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -17,6 +17,7 @@
		#include <linux/smc.h>

		#include "smc_core.h"
		#include "smc_ism.h"
		#include "smc_netlink.h"

		#define SMC_CMD_MAX_ATTR 1
		@@ -43,6 +44,11 @@ static const struct genl_ops smc_gen_nl_ops[] = {
		/* can be retrieved by unprivileged users */
		.dumpit = smcd_nl_get_lgr,
		},
		{
		.cmd = SMC_NETLINK_GET_DEV_SMCD,
		/* can be retrieved by unprivileged users */
		.dumpit = smcd_nl_get_device,
		},
		};

		static const struct nla_policy smc_gen_nl_policy[2] = {