git: kernel - Fix dangling ref on fifo vnode
Matthew Dillon
dillon at crater.dragonflybsd.org
Wed Aug 21 10:21:27 PDT 2019
commit f9ad1101b0562c99b91008bf7012745e86f230c0
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date: Wed Aug 21 10:17:50 2019 -0700
kernel - Fix dangling ref on fifo vnode
* Fix dangling refs on the fifo vnode which prevent unmount from
succeeding.
* Fix open/close races which can occur during fifo open and close
due to blocking conditions. Use a lockmgr lock instead.
* Retain use of vp->v_token to help interlock read, write, and
ioctl operations.
* This situation occurs when a filesystem fifo (aka via mkfifo)
blocks on open() and is then interrupted.
Summary of changes:
sys/vfs/fifofs/fifo_vnops.c | 212 ++++++++++++++++++++++++++++++++------------
1 file changed, 155 insertions(+), 57 deletions(-)
http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f9ad1101b0562c99b91008bf7012745e86f230c0
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