CVS commit: src/tests/fs/psshfs

["Christos Zoulas" <christos%netbsd.org@localhost>]

Module Name:    src
Committed By:   christos
Date:           Mon Sep  5 08:53:57 UTC 2016

Modified Files:
        src/tests/fs/psshfs: t_psshfs.sh

Log Message:
PR/51461: Mateusz Poszwa: Processes hang when attempting to read from an empty file on psshfs mount, add unit test:

When a process attempts to read from an empty file originating from
psshfs mount, it waits indefinitely. Until the hanged process is
interrupted, the mounted filesystem appears to work as expected,
except for the directory containing the empty file. Processes trying
to list that directory also hang, and cause misbehaviour of the
containing directory.  It is possible to create a chain of hanged
processes trying to read directories up to the mount point. At the
same time, psshfs generates some network traffic (around 5KB/s, in
my case). Interrupting the first hanged process causes emission of
an error message by all other hanged processes, and psshfs ceases
to generate network traffic. Subsequent trials to list any affected
directory or if one of the affected directories is the mount point
to unmount the filesystem, fail with the same error.


To generate a diff of this commit:
cvs rdiff -u -r1.7 -r1.8 src/tests/fs/psshfs/t_psshfs.sh

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.