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Rick Macklem db8c27f499 nfsd: fix a NFSv4.1 Linux client mount stuck in CLOSE_WAIT
It was reported that a NFSv4.1 Linux client mount against
a FreeBSD12 server was hung, with the TCP connection in
CLOSE_WAIT state on the server.
When a NFSv4.1/4.2 mount is done and the back channel is
bound to the TCP connection, the soclose() is delayed until
a new TCP connection is bound to the back channel, due to
a reference count being held on the SVCXPRT structure in
the krpc for the socket. Without the soclose() call, the socket
will remain in CLOSE_WAIT and this somehow caused the Linux
client to hang.

This patch adds calls to soshutdown(.., SHUT_WR) that
are performed when the server side krpc sees that the
socket is no longer usable.  Since this can be done
before the back channel is bound to a new TCP connection,
it allows the TCP connection to proceed to CLOSED state.

PR:	254590
Reported by:	jbreitman@tildenparkcapital.com
Reviewed by:	tuexen
Comments by:	kevans
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D29526
2021-04-27 15:32:35 -07:00
.github/workflows Enable GitHub actions CI for stable/13 as well 2021-04-20 09:51:33 +01:00
bin sh: fix debug build 2021-04-11 09:23:14 +02:00
cddl dtrace tests: Fix tst.system.d after ping/ping6 unification 2021-04-23 10:28:09 -04:00
contrib Merge llvm commits for kernel address and memory sanitizer support 2021-04-27 21:18:13 +02:00
crypto Revert "Add workaround for a QoS-related bug in VMWare Workstation." 2021-04-25 17:17:22 -04:00
etc base: remove if_wg(4) and associated utilities, manpage 2021-03-17 09:14:48 -05:00
gnu dialog: fix macro redefinition 2021-03-01 16:01:44 +01:00
include Fix build with WITHOUT_AUDIT=yes in src.conf 2021-04-15 14:11:13 +02:00
kerberos5 kerberos5: fix the WITH_OPENLDAP build 2021-01-30 00:07:50 -06:00
lib pf: Fix parsing of long table names 2021-04-26 18:08:15 +02:00
libexec rc: remove the 'addswap' script. 2021-04-26 10:22:47 +01:00
release pkgbase: Remove package name mangling in generate-ucl.sh 2021-04-26 15:16:04 -04:00
rescue ping: add a ping6 hard link for backwards compatibility 2020-11-26 18:33:04 +00:00
sbin pfctl: Revert "pfctl: Another set skip <group> fix" 2021-04-27 09:05:14 +02:00
secure Revert "Add workaround for a QoS-related bug in VMWare Workstation." 2021-04-25 17:17:22 -04:00
share tcp: fix man page 2021-04-24 22:40:34 +02:00
stand loader: do not output empty menu title 2021-04-21 14:50:23 +03:00
sys nfsd: fix a NFSv4.1 Linux client mount stuck in CLOSE_WAIT 2021-04-27 15:32:35 -07:00
targets Remove kgmon(8) 2021-04-04 00:50:28 +03:00
tests pf tests: Test using '<ifgroup>:network' in tables 2021-04-27 09:05:14 +02:00
tools tools/build/bootstrap-m4: regenerate after d37f81e35b 2021-04-21 10:57:51 +01:00
usr.bin systat: Handle SIGWINCH to properly window resizing and adjust 2021-04-21 20:31:58 +02:00
usr.sbin pw(8): use openmemstream instead of sbuf(9) 2021-04-27 05:09:07 +02:00
.arcconfig Remove history.immutable from .arcconfig 2021-04-13 12:36:25 +01:00
.arclint arc lint: ignore /tests/ in chmod 2017-12-19 03:38:06 +00:00
.cirrus.yml Cirrus-CI: use FreeBSD 13.0 image for base system CI build 2021-04-19 15:23:14 -04:00
.clang-format clang-format: Avoid breaking after the opening paren of function definitions 2020-10-28 11:54:00 +00:00
.gitattributes Add a basic clang-format configuration file 2019-06-07 15:23:52 +00:00
.gitignore gitignore: expand list of ignored files 2021-01-14 17:03:57 +01:00
COPYRIGHT copyrights: Happy New Year 2021 2020-12-31 10:29:44 -05:00
LOCKS LOCKS: update current locks 2018-06-09 03:08:04 +00:00
MAINTAINERS Add a pointer to csprng@ for the CSPRNG driver. This is enforced anyway by 2020-09-01 08:02:12 +00:00
Makefile Fix 'make bmake' top-level bootstrapping. 2021-03-06 09:45:08 -08:00
Makefile.inc1 Makefile.inc1: unbreak bootstrap when kbdcontrol does not exist 2021-03-23 20:47:14 -04:00
Makefile.libcompat libcompat: remove redundant path for ncurses 2021-01-07 15:14:52 +01:00
Makefile.sys.inc AUTO_OBJ: For all top-level targets enforce using an OBJDIR. 2017-12-05 21:29:47 +00:00
ObsoleteFiles.inc rc: remove the 'addswap' script. 2021-04-26 10:22:47 +01:00
README.md Whitespace cleanup 2021-03-12 19:57:58 +08:00
RELNOTES Spellcheck. 2021-04-12 15:12:19 -07:00
UPDATING UPDATING: add an entry for commit 8759773148 2021-04-26 16:47:15 -07:00

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