[PATCH 07/10] netlink: decode AF_SMC diag attributes

[JingPiao Chen]

* netlink_sock_diag.c: Include "xlat/smc_link_group_roles.h".
(smc_decoders): New array.
(decode_smc_diag_msg): Use it.
* linux/smc_diag.h (smc_diag_cursor, smc_diag_conninfo
smc_diag_linkinfo, smc_diag_lgrinfo): New structures.
* xlat/smc_link_group_roles.in: New file.
---
 linux/smc_diag.h             | 39 +++++++++++++++++++
 netlink_sock_diag.c          | 89 +++++++++++++++++++++++++++++++++++++++++++-
 xlat/smc_link_group_roles.in |  2 +
 3 files changed, 129 insertions(+), 1 deletion(-)
 create mode 100644 xlat/smc_link_group_roles.in

diff --git a/linux/smc_diag.h b/linux/smc_diag.h
index aea7d32..a9d4a51 100644
--- a/linux/smc_diag.h
+++ b/linux/smc_diag.h
@@ -30,4 +30,43 @@ enum {
 	SMC_DIAG_SHUTDOWN,
 };
 
+/* SMC_DIAG_CONNINFO */
+struct smc_diag_cursor {
+	uint16_t reserved;
+	uint16_t wrap;
+	uint32_t count;
+};
+
+struct smc_diag_conninfo {
+	uint32_t		token;
+	uint32_t		sndbuf_size;
+	uint32_t		rmbe_size;
+	uint32_t		peer_rmbe_size;
+	struct smc_diag_cursor	rx_prod;
+	struct smc_diag_cursor	rx_cons;
+	struct smc_diag_cursor	tx_prod;
+	struct smc_diag_cursor	tx_cons;
+	uint8_t			rx_prod_flags;
+	uint8_t			rx_conn_state_flags;
+	uint8_t			tx_prod_flags;
+	uint8_t			tx_conn_state_flags;
+	struct smc_diag_cursor	tx_prep;
+	struct smc_diag_cursor	tx_sent;
+	struct smc_diag_cursor	tx_fin;
+};
+
+/* SMC_DIAG_LINKINFO */
+struct smc_diag_linkinfo {
+	uint8_t link_id;
+	uint8_t ibname[64]; /* IB_DEVICE_NAME_MAX */
+	uint8_t ibport;
+	uint8_t gid[40];
+	uint8_t peer_gid[40];
+};
+
+struct smc_diag_lgrinfo {
+	struct smc_diag_linkinfo lnk[1];
+	uint8_t role;
+};
+
 #endif /* !STRACE_LINUX_SMC_DIAG_H */
diff --git a/netlink_sock_diag.c b/netlink_sock_diag.c
index 43e6f0b..bc2c78f 100644
--- a/netlink_sock_diag.c
+++ b/netlink_sock_diag.c
@@ -61,6 +61,7 @@
 #ifdef AF_SMC
 # include "xlat/smc_diag_attrs.h"
 # include "xlat/smc_diag_extended_flags.h"
+# include "xlat/smc_link_group_roles.h"
 # include "xlat/smc_states.h"
 #endif
 
@@ -892,6 +893,92 @@ decode_smc_diag_req(struct tcb *const tcp,
 }
 
 static void
+print_smc_diag_cursor(const struct smc_diag_cursor *cursor)
+{
+	tprintf("{reserved=%" PRIu16 ", wrap=%" PRIu16
+		", count=%" PRIu32 "}",
+		cursor->reserved, cursor->wrap, cursor->count);
+}
+
+static bool
+decode_smc_diag_conninfo(struct tcb *tcp, kernel_ulong_t addr,
+			 kernel_ulong_t len, void *const opaque_data)
+{
+	struct smc_diag_conninfo cinfo;
+
+	if (len < sizeof(cinfo))
+		return false;
+	if (umove_or_printaddr(tcp, addr, &cinfo))
+		return true;
+
+	tprintf("{token=%" PRIu32 ", sndbuf_size=%" PRIu32
+		", rmbe_size=%" PRIu32 ", peer_rmbe_size=%" PRIu32,
+		cinfo.token, cinfo.sndbuf_size,
+		cinfo.rmbe_size, cinfo.peer_rmbe_size);
+	tprints(", rx_prod=");
+	print_smc_diag_cursor(&cinfo.rx_prod);
+	tprints(", rx_cons=");
+	print_smc_diag_cursor(&cinfo.rx_cons);
+	tprints(", tx_prod=");
+	print_smc_diag_cursor(&cinfo.tx_prod);
+	tprints(", tx_cons=");
+	print_smc_diag_cursor(&cinfo.tx_cons);
+	tprintf(", rx_prod_flags=%#0*x, rx_conn_state_flags=%#0*x"
+		", tx_prod_flags=%#0*x, tx_conn_state_flags=%#0*x",
+		(int) sizeof(cinfo.rx_prod_flags) * 2 + 2,
+		cinfo.rx_prod_flags,
+		(int) sizeof(cinfo.rx_conn_state_flags) * 2 + 2,
+		cinfo.rx_conn_state_flags,
+		(int) sizeof(cinfo.tx_prod_flags) * 2 + 2,
+		cinfo.tx_prod_flags,
+		(int) sizeof(cinfo.tx_conn_state_flags) * 2 + 2,
+		cinfo.tx_conn_state_flags);
+	tprints(", tx_prep=");
+	print_smc_diag_cursor(&cinfo.tx_prep);
+	tprints(", tx_sent=");
+	print_smc_diag_cursor(&cinfo.tx_sent);
+	tprints(", tx_fin=");
+	print_smc_diag_cursor(&cinfo.tx_fin);
+	tprints("}");
+
+	return true;
+}
+
+static bool
+decode_smc_diag_lgrinfo(struct tcb *tcp, kernel_ulong_t addr,
+			kernel_ulong_t len, void *const opaque_data)
+{
+	struct smc_diag_lgrinfo linfo;
+
+	if (len < sizeof(linfo))
+		return false;
+	if (umove_or_printaddr(tcp, addr, &linfo))
+		return true;
+
+	tprintf("{lnk[0]={link_id=%" PRIu8 ", ibname=", linfo.lnk[0].link_id);
+	print_quoted_string((char *) linfo.lnk[0].ibname,
+			    sizeof(linfo.lnk[0].ibname), QUOTE_0_TERMINATED);
+	tprintf(", ibport=%" PRIu8 ", gid=", linfo.lnk[0].ibport);
+	print_quoted_string((char *) linfo.lnk[0].gid,
+			    sizeof(linfo.lnk[0].gid), QUOTE_0_TERMINATED);
+	tprints(", peer_gid=");
+	print_quoted_string((char *) linfo.lnk[0].peer_gid,
+			    sizeof(linfo.lnk[0].peer_gid), QUOTE_0_TERMINATED);
+	tprints("}");
+	tprints(", role=");
+	printxval(smc_link_group_roles, linfo.role, "SMC_???");
+	tprints("}");
+
+	return true;
+}
+
+static nla_decoder_t smc_decoders[] = {
+	[SMC_DIAG_CONNINFO]	= decode_smc_diag_conninfo,
+	[SMC_DIAG_LGRINFO]	= decode_smc_diag_lgrinfo,
+	[SMC_DIAG_SHUTDOWN]	= decode_nla_u8
+};
+
+static void
 decode_smc_diag_msg(struct tcb *const tcp,
 		    const struct nlmsghdr *const nlmsghdr,
 		    const uint8_t family,
@@ -934,7 +1021,7 @@ decode_smc_diag_msg(struct tcb *const tcp,
 		tprints(", ");
 		decode_nlattr(tcp, addr + offset, len - offset,
 			      smc_diag_attrs, "SMC_DIAG_???",
-			      NULL, 0, NULL);
+			      smc_decoders, ARRAY_SIZE(smc_decoders), NULL);
 	}
 }
 #endif
diff --git a/xlat/smc_link_group_roles.in b/xlat/smc_link_group_roles.in
new file mode 100644
index 0000000..d1cc06d
--- /dev/null
+++ b/xlat/smc_link_group_roles.in
@@ -0,0 +1,2 @@
+SMC_CLNT	0
+SMC_SERV	1
-- 
2.7.4