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Message-Id: <7e3da456061fb6d38533327928a66cacdbde8ded.1529922794.git.ka-cheong.poon@oracle.com>
Date: Mon, 25 Jun 2018 03:38:13 -0700
From: Ka-Cheong Poon <ka-cheong.poon@...cle.com>
To: netdev@...r.kernel.org
Cc: santosh.shilimkar@...cle.com, davem@...emloft.net,
rds-devel@....oracle.com
Subject: [PATCH net-next 3/3] rds: Extend RDS API for IPv6 support
There are many data structures (RDS socket options) used by RDS apps
which use a 32 bit integer to store IP address. To support IPv6,
struct in6_addr needs to be used. To ensure backward compatibility, a
new data structure is introduced for each of those data structures
which use a 32 bit integer to represent an IP address. And new socket
options are introduced to use those new structures. This means that
existing apps should work without a problem with the new RDS module.
For apps which want to use IPv6, those new data structures and socket
options can be used. IPv4 mapped address is used to represent IPv4
address in the new data structures.
Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@...cle.com>
---
include/uapi/linux/rds.h | 71 +++++++++++++++++++++++++++++++++--
net/rds/connection.c | 97 ++++++++++++++++++++++++++++++++++++++++++++----
net/rds/ib.c | 52 ++++++++++++++++++++++++++
net/rds/ib_mr.h | 2 +
net/rds/ib_rdma.c | 11 +++++-
net/rds/rds.h | 4 ++
net/rds/recv.c | 25 +++++++++++++
net/rds/tcp.c | 44 ++++++++++++++++++++++
8 files changed, 295 insertions(+), 11 deletions(-)
diff --git a/include/uapi/linux/rds.h b/include/uapi/linux/rds.h
index 20c6bd0..518d40f 100644
--- a/include/uapi/linux/rds.h
+++ b/include/uapi/linux/rds.h
@@ -1,6 +1,6 @@
/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR Linux-OpenIB) */
/*
- * Copyright (c) 2008 Oracle. All rights reserved.
+ * Copyright (c) 2008, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -52,7 +52,7 @@
#define RDS_RECVERR 5
#define RDS_CONG_MONITOR 6
#define RDS_GET_MR_FOR_DEST 7
-#define SO_RDS_TRANSPORT 8
+#define SO_RDS_TRANSPORT 9
/* Socket option to tap receive path latency
* SO_RDS: SO_RDS_MSG_RXPATH_LATENCY
@@ -118,7 +118,17 @@
#define RDS_INFO_IB_CONNECTIONS 10008
#define RDS_INFO_CONNECTION_STATS 10009
#define RDS_INFO_IWARP_CONNECTIONS 10010
-#define RDS_INFO_LAST 10010
+
+/* PF_RDS6 options */
+#define RDS6_INFO_CONNECTIONS 10011
+#define RDS6_INFO_SEND_MESSAGES 10012
+#define RDS6_INFO_RETRANS_MESSAGES 10013
+#define RDS6_INFO_RECV_MESSAGES 10014
+#define RDS6_INFO_SOCKETS 10015
+#define RDS6_INFO_TCP_SOCKETS 10016
+#define RDS6_INFO_IB_CONNECTIONS 10017
+
+#define RDS_INFO_LAST 10017
struct rds_info_counter {
__u8 name[32];
@@ -140,6 +150,15 @@ struct rds_info_connection {
__u8 flags;
} __attribute__((packed));
+struct rds6_info_connection {
+ __u64 next_tx_seq;
+ __u64 next_rx_seq;
+ struct in6_addr laddr;
+ struct in6_addr faddr;
+ __u8 transport[TRANSNAMSIZ]; /* null term ascii */
+ __u8 flags;
+} __attribute__((packed));
+
#define RDS_INFO_MESSAGE_FLAG_ACK 0x01
#define RDS_INFO_MESSAGE_FLAG_FAST_ACK 0x02
@@ -153,6 +172,17 @@ struct rds_info_message {
__u8 flags;
} __attribute__((packed));
+struct rds6_info_message {
+ __u64 seq;
+ __u32 len;
+ struct in6_addr laddr;
+ struct in6_addr faddr;
+ __be16 lport;
+ __be16 fport;
+ __u8 flags;
+ __u8 tos;
+} __attribute__((packed));
+
struct rds_info_socket {
__u32 sndbuf;
__be32 bound_addr;
@@ -163,6 +193,16 @@ struct rds_info_socket {
__u64 inum;
} __attribute__((packed));
+struct rds6_info_socket {
+ __u32 sndbuf;
+ struct in6_addr bound_addr;
+ struct in6_addr connected_addr;
+ __be16 bound_port;
+ __be16 connected_port;
+ __u32 rcvbuf;
+ __u64 inum;
+} __attribute__((packed));
+
struct rds_info_tcp_socket {
__be32 local_addr;
__be16 local_port;
@@ -175,6 +215,18 @@ struct rds_info_tcp_socket {
__u32 last_seen_una;
} __attribute__((packed));
+struct rds6_info_tcp_socket {
+ struct in6_addr local_addr;
+ __be16 local_port;
+ struct in6_addr peer_addr;
+ __be16 peer_port;
+ __u64 hdr_rem;
+ __u64 data_rem;
+ __u32 last_sent_nxt;
+ __u32 last_expected_una;
+ __u32 last_seen_una;
+} __attribute__((packed));
+
#define RDS_IB_GID_LEN 16
struct rds_info_rdma_connection {
__be32 src_addr;
@@ -189,6 +241,19 @@ struct rds_info_rdma_connection {
__u32 rdma_mr_size;
};
+struct rds6_info_rdma_connection {
+ struct in6_addr src_addr;
+ struct in6_addr dst_addr;
+ __u8 src_gid[RDS_IB_GID_LEN];
+ __u8 dst_gid[RDS_IB_GID_LEN];
+
+ __u32 max_send_wr;
+ __u32 max_recv_wr;
+ __u32 max_send_sge;
+ __u32 rdma_mr_max;
+ __u32 rdma_mr_size;
+};
+
/* RDS message Receive Path Latency points */
enum rds_message_rxpath_latency {
RDS_MSG_RX_HDR_TO_DGRAM_START = 0,
diff --git a/net/rds/connection.c b/net/rds/connection.c
index 8c5d093..5819b64 100644
--- a/net/rds/connection.c
+++ b/net/rds/connection.c
@@ -488,15 +488,19 @@ void rds_conn_destroy(struct rds_connection *conn)
static void __rds_inc_msg_cp(struct rds_incoming *inc,
struct rds_info_iterator *iter,
- void *saddr, void *daddr, int flip)
+ void *saddr, void *daddr, int flip, bool isv6)
{
- rds_inc_info_copy(inc, iter, *(__be32 *)saddr, *(__be32 *)daddr, flip);
+ if (isv6)
+ rds6_inc_info_copy(inc, iter, saddr, daddr, flip);
+ else
+ rds_inc_info_copy(inc, iter, *(__be32 *)saddr,
+ *(__be32 *)daddr, flip);
}
static void rds_conn_message_info_cmn(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens,
- int want_send)
+ int want_send, bool isv6)
{
struct hlist_head *head;
struct list_head *list;
@@ -507,7 +511,10 @@ static void rds_conn_message_info_cmn(struct socket *sock, unsigned int len,
size_t i;
int j;
- len /= sizeof(struct rds_info_message);
+ if (isv6)
+ len /= sizeof(struct rds6_info_message);
+ else
+ len /= sizeof(struct rds_info_message);
rcu_read_lock();
@@ -537,7 +544,7 @@ static void rds_conn_message_info_cmn(struct socket *sock, unsigned int len,
iter,
&conn->c_laddr,
&conn->c_faddr,
- 0);
+ 0, isv6);
}
spin_unlock_irqrestore(&cp->cp_lock, flags);
@@ -547,7 +554,10 @@ static void rds_conn_message_info_cmn(struct socket *sock, unsigned int len,
rcu_read_unlock();
lens->nr = total;
- lens->each = sizeof(struct rds_info_message);
+ if (isv6)
+ lens->each = sizeof(struct rds6_info_message);
+ else
+ lens->each = sizeof(struct rds_info_message);
}
static void rds_conn_message_info(struct socket *sock, unsigned int len,
@@ -555,7 +565,15 @@ static void rds_conn_message_info(struct socket *sock, unsigned int len,
struct rds_info_lengths *lens,
int want_send)
{
- rds_conn_message_info_cmn(sock, len, iter, lens, want_send);
+ rds_conn_message_info_cmn(sock, len, iter, lens, want_send, false);
+}
+
+static void rds6_conn_message_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens,
+ int want_send)
+{
+ rds_conn_message_info_cmn(sock, len, iter, lens, want_send, true);
}
static void rds_conn_message_info_send(struct socket *sock, unsigned int len,
@@ -565,6 +583,13 @@ static void rds_conn_message_info_send(struct socket *sock, unsigned int len,
rds_conn_message_info(sock, len, iter, lens, 1);
}
+static void rds6_conn_message_info_send(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ rds6_conn_message_info(sock, len, iter, lens, 1);
+}
+
static void rds_conn_message_info_retrans(struct socket *sock,
unsigned int len,
struct rds_info_iterator *iter,
@@ -573,6 +598,14 @@ static void rds_conn_message_info_retrans(struct socket *sock,
rds_conn_message_info(sock, len, iter, lens, 0);
}
+static void rds6_conn_message_info_retrans(struct socket *sock,
+ unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ rds6_conn_message_info(sock, len, iter, lens, 0);
+}
+
void rds_for_each_conn_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens,
@@ -688,6 +721,34 @@ static int rds_conn_info_visitor(struct rds_conn_path *cp, void *buffer)
return 1;
}
+static int rds6_conn_info_visitor(struct rds_conn_path *cp, void *buffer)
+{
+ struct rds6_info_connection *cinfo6 = buffer;
+ struct rds_connection *conn = cp->cp_conn;
+
+ cinfo6->next_tx_seq = cp->cp_next_tx_seq;
+ cinfo6->next_rx_seq = cp->cp_next_rx_seq;
+ cinfo6->laddr = conn->c_laddr;
+ cinfo6->faddr = conn->c_faddr;
+ strncpy(cinfo6->transport, conn->c_trans->t_name,
+ sizeof(cinfo6->transport));
+ cinfo6->flags = 0;
+
+ rds_conn_info_set(cinfo6->flags, test_bit(RDS_IN_XMIT, &cp->cp_flags),
+ SENDING);
+ /* XXX Future: return the state rather than these funky bits */
+ rds_conn_info_set(cinfo6->flags,
+ atomic_read(&cp->cp_state) == RDS_CONN_CONNECTING,
+ CONNECTING);
+ rds_conn_info_set(cinfo6->flags,
+ atomic_read(&cp->cp_state) == RDS_CONN_UP,
+ CONNECTED);
+ /* Just return 1 as there is no error case. This is a helper function
+ * for rds_walk_conn_path_info() and it wants a return value.
+ */
+ return 1;
+}
+
static void rds_conn_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
@@ -700,6 +761,18 @@ static void rds_conn_info(struct socket *sock, unsigned int len,
sizeof(struct rds_info_connection));
}
+static void rds6_conn_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ u64 buffer[(sizeof(struct rds6_info_connection) + 7) / 8];
+
+ rds_walk_conn_path_info(sock, len, iter, lens,
+ rds6_conn_info_visitor,
+ buffer,
+ sizeof(struct rds6_info_connection));
+}
+
int rds_conn_init(void)
{
rds_conn_slab = kmem_cache_create("rds_connection",
@@ -713,6 +786,11 @@ int rds_conn_init(void)
rds_conn_message_info_send);
rds_info_register_func(RDS_INFO_RETRANS_MESSAGES,
rds_conn_message_info_retrans);
+ rds_info_register_func(RDS6_INFO_CONNECTIONS, rds6_conn_info);
+ rds_info_register_func(RDS6_INFO_SEND_MESSAGES,
+ rds6_conn_message_info_send);
+ rds_info_register_func(RDS6_INFO_RETRANS_MESSAGES,
+ rds6_conn_message_info_retrans);
return 0;
}
@@ -730,6 +808,11 @@ void rds_conn_exit(void)
rds_conn_message_info_send);
rds_info_deregister_func(RDS_INFO_RETRANS_MESSAGES,
rds_conn_message_info_retrans);
+ rds_info_deregister_func(RDS6_INFO_CONNECTIONS, rds6_conn_info);
+ rds_info_deregister_func(RDS6_INFO_SEND_MESSAGES,
+ rds6_conn_message_info_send);
+ rds_info_deregister_func(RDS6_INFO_RETRANS_MESSAGES,
+ rds6_conn_message_info_retrans);
}
/*
diff --git a/net/rds/ib.c b/net/rds/ib.c
index 756225c..63d95ea 100644
--- a/net/rds/ib.c
+++ b/net/rds/ib.c
@@ -321,6 +321,43 @@ static int rds_ib_conn_info_visitor(struct rds_connection *conn,
return 1;
}
+/* IPv6 version of rds_ib_conn_info_visitor(). */
+static int rds6_ib_conn_info_visitor(struct rds_connection *conn,
+ void *buffer)
+{
+ struct rds6_info_rdma_connection *iinfo6 = buffer;
+ struct rds_ib_connection *ic;
+
+ /* We will only ever look at IB transports */
+ if (conn->c_trans != &rds_ib_transport)
+ return 0;
+
+ iinfo6->src_addr = conn->c_laddr;
+ iinfo6->dst_addr = conn->c_faddr;
+
+ memset(&iinfo6->src_gid, 0, sizeof(iinfo6->src_gid));
+ memset(&iinfo6->dst_gid, 0, sizeof(iinfo6->dst_gid));
+
+ if (rds_conn_state(conn) == RDS_CONN_UP) {
+ struct rds_ib_device *rds_ibdev;
+ struct rdma_dev_addr *dev_addr;
+
+ ic = conn->c_transport_data;
+ dev_addr = &ic->i_cm_id->route.addr.dev_addr;
+ rdma_addr_get_sgid(dev_addr,
+ (union ib_gid *)&iinfo6->src_gid);
+ rdma_addr_get_dgid(dev_addr,
+ (union ib_gid *)&iinfo6->dst_gid);
+
+ rds_ibdev = ic->rds_ibdev;
+ iinfo6->max_send_wr = ic->i_send_ring.w_nr;
+ iinfo6->max_recv_wr = ic->i_recv_ring.w_nr;
+ iinfo6->max_send_sge = rds_ibdev->max_sge;
+ rds6_ib_get_mr_info(rds_ibdev, iinfo6);
+ }
+ return 1;
+}
+
static void rds_ib_ic_info(struct socket *sock, unsigned int len,
struct rds_info_iterator *iter,
struct rds_info_lengths *lens)
@@ -333,6 +370,19 @@ static void rds_ib_ic_info(struct socket *sock, unsigned int len,
sizeof(struct rds_info_rdma_connection));
}
+/* IPv6 version of rds_ib_ic_info(). */
+static void rds6_ib_ic_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ u64 buffer[(sizeof(struct rds6_info_rdma_connection) + 7) / 8];
+
+ rds_for_each_conn_info(sock, len, iter, lens,
+ rds6_ib_conn_info_visitor,
+ buffer,
+ sizeof(struct rds6_info_rdma_connection));
+}
+
/*
* Early RDS/IB was built to only bind to an address if there is an IPoIB
* device with that address set.
@@ -441,6 +491,7 @@ void rds_ib_exit(void)
rds_ib_set_unloading();
synchronize_rcu();
rds_info_deregister_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
+ rds_info_deregister_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
rds_ib_unregister_client();
rds_ib_destroy_nodev_conns();
rds_ib_sysctl_exit();
@@ -502,6 +553,7 @@ int rds_ib_init(void)
rds_trans_register(&rds_ib_transport);
rds_info_register_func(RDS_INFO_IB_CONNECTIONS, rds_ib_ic_info);
+ rds_info_register_func(RDS6_INFO_IB_CONNECTIONS, rds6_ib_ic_info);
goto out;
diff --git a/net/rds/ib_mr.h b/net/rds/ib_mr.h
index 0ea4ab0..f440ace 100644
--- a/net/rds/ib_mr.h
+++ b/net/rds/ib_mr.h
@@ -113,6 +113,8 @@ struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev,
int npages);
void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
struct rds_info_rdma_connection *iinfo);
+void rds6_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
+ struct rds6_info_rdma_connection *iinfo6);
void rds_ib_destroy_mr_pool(struct rds_ib_mr_pool *);
void *rds_ib_get_mr(struct scatterlist *sg, unsigned long nents,
struct rds_sock *rs, u32 *key_ret);
diff --git a/net/rds/ib_rdma.c b/net/rds/ib_rdma.c
index 0ec9df0..e3c8bbb 100644
--- a/net/rds/ib_rdma.c
+++ b/net/rds/ib_rdma.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2006, 2017 Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
@@ -180,6 +180,15 @@ void rds_ib_get_mr_info(struct rds_ib_device *rds_ibdev, struct rds_info_rdma_co
iinfo->rdma_mr_size = pool_1m->fmr_attr.max_pages;
}
+void rds6_ib_get_mr_info(struct rds_ib_device *rds_ibdev,
+ struct rds6_info_rdma_connection *iinfo6)
+{
+ struct rds_ib_mr_pool *pool_1m = rds_ibdev->mr_1m_pool;
+
+ iinfo6->rdma_mr_max = pool_1m->max_items;
+ iinfo6->rdma_mr_size = pool_1m->fmr_attr.max_pages;
+}
+
struct rds_ib_mr *rds_ib_reuse_mr(struct rds_ib_mr_pool *pool)
{
struct rds_ib_mr *ibmr = NULL;
diff --git a/net/rds/rds.h b/net/rds/rds.h
index f5f99d1..fd63b86 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -875,6 +875,10 @@ int rds_recvmsg(struct socket *sock, struct msghdr *msg, size_t size,
void rds_inc_info_copy(struct rds_incoming *inc,
struct rds_info_iterator *iter,
__be32 saddr, __be32 daddr, int flip);
+void rds6_inc_info_copy(struct rds_incoming *inc,
+ struct rds_info_iterator *iter,
+ struct in6_addr *saddr, struct in6_addr *daddr,
+ int flip);
/* send.c */
int rds_sendmsg(struct socket *sock, struct msghdr *msg, size_t payload_len);
diff --git a/net/rds/recv.c b/net/rds/recv.c
index 4217961..10a2d0f 100644
--- a/net/rds/recv.c
+++ b/net/rds/recv.c
@@ -792,3 +792,28 @@ void rds_inc_info_copy(struct rds_incoming *inc,
rds_info_copy(iter, &minfo, sizeof(minfo));
}
+
+void rds6_inc_info_copy(struct rds_incoming *inc,
+ struct rds_info_iterator *iter,
+ struct in6_addr *saddr, struct in6_addr *daddr,
+ int flip)
+{
+ struct rds6_info_message minfo6;
+
+ minfo6.seq = be64_to_cpu(inc->i_hdr.h_sequence);
+ minfo6.len = be32_to_cpu(inc->i_hdr.h_len);
+
+ if (flip) {
+ minfo6.laddr = *daddr;
+ minfo6.faddr = *saddr;
+ minfo6.lport = inc->i_hdr.h_dport;
+ minfo6.fport = inc->i_hdr.h_sport;
+ } else {
+ minfo6.laddr = *saddr;
+ minfo6.faddr = *daddr;
+ minfo6.lport = inc->i_hdr.h_sport;
+ minfo6.fport = inc->i_hdr.h_dport;
+ }
+
+ rds_info_copy(iter, &minfo6, sizeof(minfo6));
+}
diff --git a/net/rds/tcp.c b/net/rds/tcp.c
index fb0dac1..c556f0d 100644
--- a/net/rds/tcp.c
+++ b/net/rds/tcp.c
@@ -273,6 +273,48 @@ static void rds_tcp_tc_info(struct socket *rds_sock, unsigned int len,
spin_unlock_irqrestore(&rds_tcp_tc_list_lock, flags);
}
+/* Handle RDS6_INFO_TCP_SOCKETS socket option. It returns both IPv4 and
+ * IPv6 connections. IPv4 connection address is returned in an IPv4 mapped
+ * address.
+ */
+static void rds6_tcp_tc_info(struct socket *sock, unsigned int len,
+ struct rds_info_iterator *iter,
+ struct rds_info_lengths *lens)
+{
+ struct rds6_info_tcp_socket tsinfo6;
+ struct rds_tcp_connection *tc;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rds_tcp_tc_list_lock, flags);
+
+ if (len / sizeof(tsinfo6) < rds6_tcp_tc_count)
+ goto out;
+
+ list_for_each_entry(tc, &rds_tcp_tc_list, t_list_item) {
+ struct sock *sk = tc->t_sock->sk;
+ struct inet_sock *inet = inet_sk(sk);
+
+ tsinfo6.local_addr = sk->sk_v6_rcv_saddr;
+ tsinfo6.local_port = inet->inet_sport;
+ tsinfo6.peer_addr = sk->sk_v6_daddr;
+ tsinfo6.peer_port = inet->inet_dport;
+
+ tsinfo6.hdr_rem = tc->t_tinc_hdr_rem;
+ tsinfo6.data_rem = tc->t_tinc_data_rem;
+ tsinfo6.last_sent_nxt = tc->t_last_sent_nxt;
+ tsinfo6.last_expected_una = tc->t_last_expected_una;
+ tsinfo6.last_seen_una = tc->t_last_seen_una;
+
+ rds_info_copy(iter, &tsinfo6, sizeof(tsinfo6));
+ }
+
+out:
+ lens->nr = rds6_tcp_tc_count;
+ lens->each = sizeof(tsinfo6);
+
+ spin_unlock_irqrestore(&rds_tcp_tc_list_lock, flags);
+}
+
static int rds_tcp_laddr_check(struct net *net, const struct in6_addr *addr,
__u32 scope_id)
{
@@ -629,6 +671,7 @@ static void rds_tcp_exit(void)
rds_tcp_set_unloading();
synchronize_rcu();
rds_info_deregister_func(RDS_INFO_TCP_SOCKETS, rds_tcp_tc_info);
+ rds_info_deregister_func(RDS6_INFO_TCP_SOCKETS, rds6_tcp_tc_info);
unregister_pernet_device(&rds_tcp_net_ops);
rds_tcp_destroy_conns();
rds_trans_unregister(&rds_tcp_transport);
@@ -660,6 +703,7 @@ static int rds_tcp_init(void)
rds_trans_register(&rds_tcp_transport);
rds_info_register_func(RDS_INFO_TCP_SOCKETS, rds_tcp_tc_info);
+ rds_info_register_func(RDS6_INFO_TCP_SOCKETS, rds6_tcp_tc_info);
goto out;
out_recv:
--
1.8.3.1
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