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Chuck Lever 5fac1c6ccc xprtrdma: Reset credit grant properly after a disconnect 
[ Upstream commit ef739b2175 ]

On a fresh connection, an RPC/RDMA client is supposed to send only
one RPC Call until it gets a credit grant in the first RPC Reply
from the server [RFC 8166, Section 3.3.3].

There is a bug in the Linux client's credit accounting mechanism
introduced by commit e7ce710a88 ("xprtrdma: Avoid deadlock when
credit window is reset"). On connect, it simply dumps all pending
RPC Calls onto the new connection.

Servers have been tolerant of this bad behavior. Currently no server
implementation ever changes its credit grant over reconnects, and
servers always repost enough Receives before connections are fully
established.

To correct this issue, ensure that the client resets both the credit
grant _and_ the congestion window when handling a reconnect.

Fixes: e7ce710a88 ("xprtrdma: Avoid deadlock when credit ... ")
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Cc: stable@kernel.org
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-11-13 11:08:34 -08:00
..
6lowpan 6lowpan: iphc: reset mac_header after decompress to fix panic 2018-07-06 12:32:12 +02:00
9p Pull request for inclusion in 4.19, take two 2018-08-17 17:27:58 -07:00
802
8021q net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
appletalk Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
atm Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
ax25 ax25: remove blank line at EOF 2018-07-24 14:10:42 -07:00
batman-adv batman-adv: Increase version number to 2018.3 2018-09-14 17:59:20 +02:00
bluetooth Bluetooth: SMP: fix crash in unpairing 2018-09-26 12:39:32 +03:00
bpf bpf/test_run: support cgroup local storage 2018-08-03 00:47:32 +02:00
bpfilter net: bpfilter: use get_pid_task instead of pid_task 2018-10-17 22:03:40 -07:00
bridge net: bridge: remove ipv6 zero address check in mcast queries 2018-11-04 14:50:54 +01:00
caif Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
can Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
ceph crush: fix using plain integer as NULL warning 2018-08-13 17:55:44 +02:00
core cgroup, netclassid: add a preemption point to write_classid 2018-11-13 11:08:31 -08:00
dcb net: dcb: Add priority-to-DSCP map getters 2018-07-27 13:17:50 -07:00
dccp Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
decnet decnet: fix using plain integer as NULL warning 2018-08-09 14:11:24 -07:00
dns_resolver net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
dsa net: dsa: Drop GPIO includes 2018-08-27 15:24:33 -07:00
ethernet net: Convert GRO SKB handling to list_head. 2018-06-26 11:33:04 +09:00
hsr
ieee802154 net: ieee802154: 6lowpan: remove redundant pointers 'fq' and 'net' 2018-08-06 11:21:15 +02:00
ife
ipv4 net: drop skb on failure in ip_check_defrag() 2018-11-04 14:50:53 +01:00
ipv6 net/ipv6: Allow onlink routes to have a device mismatch if it is the default route 2018-11-04 14:50:52 +01:00
iucv Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
kcm Revert "kcm: remove any offset before parsing messages" 2018-09-17 18:43:42 -07:00
key Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2018-07-27 09:33:37 -07:00
l2tp l2tp: fix unused function warning 2018-08-13 20:45:49 -07:00
l3mdev
lapb
llc llc: set SOCK_RCU_FREE in llc_sap_add_socket() 2018-10-15 22:01:37 -07:00
mac80211 mac80211: fix setting IEEE80211_KEY_FLAG_RX_MGMT for AP mode keys 2018-10-01 09:13:48 +02:00
mac802154 net: mac802154: tx: expand tailroom if necessary 2018-08-06 11:21:37 +02:00
mpls mpls: allow routes on ip6gre devices 2018-09-24 12:19:27 -07:00
ncsi net/ncsi: Fixup .dumpit message flags and ID check in Netlink handler 2018-08-22 21:39:08 -07:00
netfilter netfilter: xt_nat: fix DNAT target for shifted portmap ranges 2018-11-13 11:08:20 -08:00
netlabel netlabel: check for IPV4MASK in addrinfo_get 2018-09-21 18:58:34 -07:00
netlink Merge ra.kernel.org:/pub/scm/linux/kernel/git/davem/net 2018-08-05 13:04:31 -07:00
netrom Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
nfc Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
nsh nsh: set mac len based on inner packet 2018-07-12 16:55:29 -07:00
openvswitch openvswitch: Fix push/pop ethernet validation 2018-11-04 14:50:52 +01:00
packet net/packet: fix packet drop as of virtio gso 2018-10-04 22:23:15 -07:00
phonet Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
psample
qrtr net: qrtr: Reset the node and port ID of broadcast messages 2018-07-05 20:20:03 +09:00
rds rds: RDS (tcp) hangs on sendto() to unresponding address 2018-10-10 22:19:52 -07:00
rfkill Here are quite a large number of fixes, notably: 2018-09-03 22:12:02 -07:00
rose Revert changes to convert to ->poll_mask() and aio IOCB_CMD_POLL 2018-06-28 10:40:47 -07:00
rxrpc Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
sched net: sched: gred: pass the right attribute to gred_change_table_def() 2018-11-04 14:50:51 +01:00
sctp sctp: check policy more carefully when getting pr status 2018-11-04 14:50:53 +01:00
smc net/smc: fix smc_buf_unuse to use the lgr pointer 2018-11-04 14:50:52 +01:00
strparser strparser: remove redundant variable 'rd_desc' 2018-08-01 10:00:06 -07:00
sunrpc xprtrdma: Reset credit grant properly after a disconnect 2018-11-13 11:08:34 -08:00
switchdev
tipc Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
tls tls: fix currently broken MSG_PEEK behavior 2018-09-17 08:03:09 -07:00
unix Revert "net: simplify sock_poll_wait" 2018-11-04 14:50:51 +01:00
vmw_vsock vsock: split dwork to avoid reinitializations 2018-08-07 12:39:13 -07:00
wimax wimax: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
wireless cfg80211: fix use-after-free in reg_process_hint() 2018-10-01 09:14:03 +02:00
x25 x25: remove blank lines at EOF 2018-07-24 14:10:42 -07:00
xdp xsk: do not call synchronize_net() under RCU read lock 2018-10-11 10:19:01 +02:00
xfrm xfrm: policy: use hlist rcu variants on insert 2018-10-11 13:24:46 +02:00
compat.c net: avoid unnecessary sock_flag() check when enable timestamp 2018-08-06 10:42:48 -07:00
Kconfig net: remove blank lines at end of file 2018-07-24 14:10:43 -07:00
Makefile bpfilter: check compiler capability in Kconfig 2018-06-28 13:36:39 +09:00
socket.c net: socket: fix a missing-check bug 2018-10-18 16:43:06 -07:00
sysctl_net.c