[DragonFlyBSD - Bug #3339] mkdir, touch, rm occasionally do not work as expected

[bugtracker-admin at leaf.dragonflybsd.org]

Issue #3339 has been updated by peeter.


Concerns: 

- the first issue (mkdir, rm) has been tested and occurs both on UFS and HAMMER2 filesystems. 
- the second (touch, rm) has been tested only on HAMMER2. Not tested on UFS.




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Bug #3339: mkdir, touch, rm occasionally do not work as expected
http://bugs.dragonflybsd.org/issues/3339#change-14498

* Author: peeter
* Status: New
* Priority: Normal
* Target version: 6.6
* Start date: 2023-02-04
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Systems affected: 

- 6.3-DEVELOPMENT DragonFly v6.3.0.77.gfe8a9-DEVELOPMENT #4: Mon Mar 14 13:55:50 EET 2022

- 6.5-DEVELOPMENT DragonFly v6.5.0.25.ge49cd-DEVELOPMENT #63: Wed Feb  1 08:24:51 EET 2023


How to reproduce: 

- Difficult and indeterministic: sometimes occurs, sometimes not


Problem description: 

- mkdir reports the directory exists although it did not. The following command line sequences demonstrate the problem for mkdir. These sequences are un-edited, i.e. no other commands have been issued inbetween.

--- /bin/tcsh ---

user at qcomp:~ % ls -ld somedir
drwxr-xr-x  1 user  user  0 Feb  4 09:43 somedir
user at qcomp:~ % rm -rf somedir
recursively remove somedir? y
user at qcomp:~ % ls -ld somedir
ls: somedir: No such file or directory
user at qcomp:~ % mkdir somedir
mkdir: somedir: File exists
user at qcomp:~ % ls -ld somedir
drwxr-xr-x  1 user  user  0 Feb  4 09:44 somedir
user at qcomp:~ %

--- ---


- touch and rm: similarly, touch sometimes does not seem to work. 

It seems clear that 'sixfile' did not exist for rm or ls.

For 'twofile', at first it seems to work ok. But then note again later: after L7, 'twofile' should not exist any more, yet it shows up below in 'ls -l'. Note the 'twofile' time has changed (9:53 --> 9:57).


--- /bin/sh ---

$ rm twofile
$ ls -l twofile
ls: twofile: No such file or directory
$ touch twofile
$ ls -l twofile
-rw-r--r--  1 user  user  0 Feb  4 09:53 twofile
$ rm twofile
$ 
$ touch sixfile
$ rm sixfile
rm: sixfile: No such file or directory
$ ls -l sixfile
ls: sixfile: No such file or directory
$ ls -l six*
ls: six*: No such file or directory
$ ls -l
total 316
-rw-r--r--  1 user  user      0 Feb  4 09:57 twofile
$ rm twofile 
rm: twofile: No such file or directory
$ ls -l twofile
ls: twofile: No such file or directory
$ ls -l
. . . NO twofile here. . .

--- ---




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