Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 283 insertions, 0 deletions

diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c
new file mode 100644
index 000000000..f15fca59b
--- /dev/null
+++ b/net/smc/smc_diag.c
@@ -0,0 +1,283 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ * Monitoring SMC transport protocol sockets
+ *
+ * Copyright IBM Corp. 2016
+ *
+ * Author(s):  Ursula Braun <ubraun@linux.vnet.ibm.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/sock_diag.h>
+#include <linux/inet_diag.h>
+#include <linux/smc_diag.h>
+#include <net/netlink.h>
+#include <net/smc.h>
+
+#include "smc.h"
+#include "smc_core.h"
+
+struct smc_diag_dump_ctx {
+        int pos[2];
+};
+
+static struct smc_diag_dump_ctx *smc_dump_context(struct netlink_callback *cb)
+{
+        return (struct smc_diag_dump_ctx *)cb->ctx;
+}
+
+static void smc_gid_be16_convert(__u8 *buf, u8 *gid_raw)
+{
+        sprintf(buf, "%04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x",
+                be16_to_cpu(((__be16 *)gid_raw)[0]),
+                be16_to_cpu(((__be16 *)gid_raw)[1]),
+                be16_to_cpu(((__be16 *)gid_raw)[2]),
+                be16_to_cpu(((__be16 *)gid_raw)[3]),
+                be16_to_cpu(((__be16 *)gid_raw)[4]),
+                be16_to_cpu(((__be16 *)gid_raw)[5]),
+                be16_to_cpu(((__be16 *)gid_raw)[6]),
+                be16_to_cpu(((__be16 *)gid_raw)[7]));
+}
+
+static void smc_diag_msg_common_fill(struct smc_diag_msg *r, struct sock *sk)
+{
+        struct smc_sock *smc = smc_sk(sk);
+
+        memset(r, 0, sizeof(*r));
+        r->diag_family = sk->sk_family;
+        sock_diag_save_cookie(sk, r->id.idiag_cookie);
+        if (!smc->clcsock)
+                return;
+        r->id.idiag_sport = htons(smc->clcsock->sk->sk_num);
+        r->id.idiag_dport = smc->clcsock->sk->sk_dport;
+        r->id.idiag_if = smc->clcsock->sk->sk_bound_dev_if;
+        if (sk->sk_protocol == SMCPROTO_SMC) {
+                r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr;
+                r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr;
+#if IS_ENABLED(CONFIG_IPV6)
+        } else if (sk->sk_protocol == SMCPROTO_SMC6) {
+                memcpy(&r->id.idiag_src, &smc->clcsock->sk->sk_v6_rcv_saddr,
+                       sizeof(smc->clcsock->sk->sk_v6_rcv_saddr));
+                memcpy(&r->id.idiag_dst, &smc->clcsock->sk->sk_v6_daddr,
+                       sizeof(smc->clcsock->sk->sk_v6_daddr));
+#endif
+        }
+}
+
+static int smc_diag_msg_attrs_fill(struct sock *sk, struct sk_buff *skb,
+                                   struct smc_diag_msg *r,
+                                   struct user_namespace *user_ns)
+{
+        if (nla_put_u8(skb, SMC_DIAG_SHUTDOWN, sk->sk_shutdown))
+                return 1;
+
+        r->diag_uid = from_kuid_munged(user_ns, sock_i_uid(sk));
+        r->diag_inode = sock_i_ino(sk);
+        return 0;
+}
+
+static int __smc_diag_dump(struct sock *sk, struct sk_buff *skb,
+                           struct netlink_callback *cb,
+                           const struct smc_diag_req *req,
+                           struct nlattr *bc)
+{
+        struct smc_sock *smc = smc_sk(sk);
+        struct smc_diag_fallback fallback;
+        struct user_namespace *user_ns;
+        struct smc_diag_msg *r;
+        struct nlmsghdr *nlh;
+
+        nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq,
+                        cb->nlh->nlmsg_type, sizeof(*r), NLM_F_MULTI);
+        if (!nlh)
+                return -EMSGSIZE;
+
+        r = nlmsg_data(nlh);
+        smc_diag_msg_common_fill(r, sk);
+        r->diag_state = sk->sk_state;
+        if (smc->use_fallback)
+                r->diag_mode = SMC_DIAG_MODE_FALLBACK_TCP;
+        else if (smc->conn.lgr && smc->conn.lgr->is_smcd)
+                r->diag_mode = SMC_DIAG_MODE_SMCD;
+        else
+                r->diag_mode = SMC_DIAG_MODE_SMCR;
+        user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk);
+        if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns))
+                goto errout;
+
+        fallback.reason = smc->fallback_rsn;
+        fallback.peer_diagnosis = smc->peer_diagnosis;
+        if (nla_put(skb, SMC_DIAG_FALLBACK, sizeof(fallback), &fallback) < 0)
+                goto errout;
+
+        if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) &&
+            smc->conn.alert_token_local) {
+                struct smc_connection *conn = &smc->conn;
+                struct smc_diag_conninfo cinfo = {
+                        .token = conn->alert_token_local,
+                        .sndbuf_size = conn->sndbuf_desc ?
+                                conn->sndbuf_desc->len : 0,
+                        .rmbe_size = conn->rmb_desc ? conn->rmb_desc->len : 0,
+                        .peer_rmbe_size = conn->peer_rmbe_size,
+
+                        .rx_prod.wrap = conn->local_rx_ctrl.prod.wrap,
+                        .rx_prod.count = conn->local_rx_ctrl.prod.count,
+                        .rx_cons.wrap = conn->local_rx_ctrl.cons.wrap,
+                        .rx_cons.count = conn->local_rx_ctrl.cons.count,
+
+                        .tx_prod.wrap = conn->local_tx_ctrl.prod.wrap,
+                        .tx_prod.count = conn->local_tx_ctrl.prod.count,
+                        .tx_cons.wrap = conn->local_tx_ctrl.cons.wrap,
+                        .tx_cons.count = conn->local_tx_ctrl.cons.count,
+
+                        .tx_prod_flags =
+                                *(u8 *)&conn->local_tx_ctrl.prod_flags,
+                        .tx_conn_state_flags =
+                                *(u8 *)&conn->local_tx_ctrl.conn_state_flags,
+                        .rx_prod_flags = *(u8 *)&conn->local_rx_ctrl.prod_flags,
+                        .rx_conn_state_flags =
+                                *(u8 *)&conn->local_rx_ctrl.conn_state_flags,
+
+                        .tx_prep.wrap = conn->tx_curs_prep.wrap,
+                        .tx_prep.count = conn->tx_curs_prep.count,
+                        .tx_sent.wrap = conn->tx_curs_sent.wrap,
+                        .tx_sent.count = conn->tx_curs_sent.count,
+                        .tx_fin.wrap = conn->tx_curs_fin.wrap,
+                        .tx_fin.count = conn->tx_curs_fin.count,
+                };
+
+                if (nla_put(skb, SMC_DIAG_CONNINFO, sizeof(cinfo), &cinfo) < 0)
+                        goto errout;
+        }
+
+        if (smc->conn.lgr && !smc->conn.lgr->is_smcd &&
+            (req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) &&
+            !list_empty(&smc->conn.lgr->list)) {
+                struct smc_diag_lgrinfo linfo = {
+                        .role = smc->conn.lgr->role,
+                        .lnk[0].ibport = smc->conn.lgr->lnk[0].ibport,
+                        .lnk[0].link_id = smc->conn.lgr->lnk[0].link_id,
+                };
+
+                memcpy(linfo.lnk[0].ibname,
+                       smc->conn.lgr->lnk[0].smcibdev->ibdev->name,
+                       sizeof(smc->conn.lgr->lnk[0].smcibdev->ibdev->name));
+                smc_gid_be16_convert(linfo.lnk[0].gid,
+                                     smc->conn.lgr->lnk[0].gid);
+                smc_gid_be16_convert(linfo.lnk[0].peer_gid,
+                                     smc->conn.lgr->lnk[0].peer_gid);
+
+                if (nla_put(skb, SMC_DIAG_LGRINFO, sizeof(linfo), &linfo) < 0)
+                        goto errout;
+        }
+        if (smc->conn.lgr && smc->conn.lgr->is_smcd &&
+            (req->diag_ext & (1 << (SMC_DIAG_DMBINFO - 1))) &&
+            !list_empty(&smc->conn.lgr->list)) {
+                struct smc_connection *conn = &smc->conn;
+                struct smcd_diag_dmbinfo dinfo;
+
+                memset(&dinfo, 0, sizeof(dinfo));
+
+                dinfo.linkid = *((u32 *)conn->lgr->id);
+                dinfo.peer_gid = conn->lgr->peer_gid;
+                dinfo.my_gid = conn->lgr->smcd->local_gid;
+                dinfo.token = conn->rmb_desc->token;
+                dinfo.peer_token = conn->peer_token;
+
+                if (nla_put(skb, SMC_DIAG_DMBINFO, sizeof(dinfo), &dinfo) < 0)
+                        goto errout;
+        }
+
+        nlmsg_end(skb, nlh);
+        return 0;
+
+errout:
+        nlmsg_cancel(skb, nlh);
+        return -EMSGSIZE;
+}
+
+static int smc_diag_dump_proto(struct proto *prot, struct sk_buff *skb,
+                               struct netlink_callback *cb, int p_type)
+{
+        struct smc_diag_dump_ctx *cb_ctx = smc_dump_context(cb);
+        struct net *net = sock_net(skb->sk);
+        int snum = cb_ctx->pos[p_type];
+        struct nlattr *bc = NULL;
+        struct hlist_head *head;
+        int rc = 0, num = 0;
+        struct sock *sk;
+
+        read_lock(&prot->h.smc_hash->lock);
+        head = &prot->h.smc_hash->ht;
+        if (hlist_empty(head))
+                goto out;
+
+        sk_for_each(sk, head) {
+                if (!net_eq(sock_net(sk), net))
+                        continue;
+                if (num < snum)
+                        goto next;
+                rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc);
+                if (rc < 0)
+                        goto out;
+next:
+                num++;
+        }
+
+out:
+        read_unlock(&prot->h.smc_hash->lock);
+        cb_ctx->pos[p_type] = num;
+        return rc;
+}
+
+static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
+{
+        int rc = 0;
+
+        rc = smc_diag_dump_proto(&smc_proto, skb, cb, SMCPROTO_SMC);
+        if (!rc)
+                smc_diag_dump_proto(&smc_proto6, skb, cb, SMCPROTO_SMC6);
+        return skb->len;
+}
+
+static int smc_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
+{
+        struct net *net = sock_net(skb->sk);
+
+        if (h->nlmsg_type == SOCK_DIAG_BY_FAMILY &&
+            h->nlmsg_flags & NLM_F_DUMP) {
+                {
+                        struct netlink_dump_control c = {
+                                .dump = smc_diag_dump,
+                                .min_dump_alloc = SKB_WITH_OVERHEAD(32768),
+                        };
+                        return netlink_dump_start(net->diag_nlsk, skb, h, &c);
+                }
+        }
+        return 0;
+}
+
+static const struct sock_diag_handler smc_diag_handler = {
+        .family = AF_SMC,
+        .dump = smc_diag_handler_dump,
+};
+
+static int __init smc_diag_init(void)
+{
+        return sock_diag_register(&smc_diag_handler);
+}
+
+static void __exit smc_diag_exit(void)
+{
+        sock_diag_unregister(&smc_diag_handler);
+}
+
+module_init(smc_diag_init);
+module_exit(smc_diag_exit);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 43 /* AF_SMC */);