diff options
Diffstat (limited to 'net/smc/smc_diag.c')
| -rw-r--r-- | net/smc/smc_diag.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/net/smc/smc_diag.c b/net/smc/smc_diag.c new file mode 100644 index 000000000000..d2d01cf70224 --- /dev/null +++ b/net/smc/smc_diag.c @@ -0,0 +1,215 @@ +/* + * 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" + +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); + + r->diag_family = sk->sk_family; + 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; + sock_diag_save_cookie(sk, r->id.idiag_cookie); + memset(&r->id.idiag_src, 0, sizeof(r->id.idiag_src)); + memset(&r->id.idiag_dst, 0, sizeof(r->id.idiag_dst)); + r->id.idiag_src[0] = smc->clcsock->sk->sk_rcv_saddr; + r->id.idiag_dst[0] = smc->clcsock->sk->sk_daddr; +} + +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 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; + r->diag_fallback = smc->use_fallback; + user_ns = sk_user_ns(NETLINK_CB(cb->skb).sk); + if (smc_diag_msg_attrs_fill(sk, skb, r, user_ns)) + goto errout; + + if ((req->diag_ext & (1 << (SMC_DIAG_CONNINFO - 1))) && smc->conn.lgr) { + struct smc_connection *conn = &smc->conn; + struct smc_diag_conninfo cinfo = { + .token = conn->alert_token_local, + .sndbuf_size = conn->sndbuf_size, + .rmbe_size = conn->rmbe_size, + .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 ((req->diag_ext & (1 << (SMC_DIAG_LGRINFO - 1))) && smc->conn.lgr) { + 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.raw); + 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; + } + + nlmsg_end(skb, nlh); + return 0; + +errout: + nlmsg_cancel(skb, nlh); + return -EMSGSIZE; +} + +static int smc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct net *net = sock_net(skb->sk); + struct nlattr *bc = NULL; + struct hlist_head *head; + struct sock *sk; + int rc = 0; + + read_lock(&smc_proto.h.smc_hash->lock); + head = &smc_proto.h.smc_hash->ht; + if (hlist_empty(head)) + goto out; + + sk_for_each(sk, head) { + if (!net_eq(sock_net(sk), net)) + continue; + rc = __smc_diag_dump(sk, skb, cb, nlmsg_data(cb->nlh), bc); + if (rc) + break; + } + +out: + read_unlock(&smc_proto.h.smc_hash->lock); + return rc; +} + +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 */); |