[fuse-devel] Testing a FUSE filesystem against POSIX compliance

[James R. <jr...@re...>]

Hi all,

I'm trying to test my filesystem for conformance to POSIX standards,
however I'm encountering some issues when doing so.

Here is an example report of running the mkdir/05.t test against the
filesystem:

ok 1
ok 2
ok 3
not ok 4
  - -u 65534 -g 65534 mkdir
fstest_2d073a008fe0cefa4b6b60fa0a939995/fstest_bbefd481ec972e7d9e1ee36e7b804ff7
0755
not ok 5
  - -u 65534 -g 65534 rmdir
fstest_2d073a008fe0cefa4b6b60fa0a939995/fstest_bbefd481ec972e7d9e1ee36e7b804ff7
ok 6
ok 7
ok 8
not ok 9
  - -u 65534 -g 65534 mkdir
fstest_2d073a008fe0cefa4b6b60fa0a939995/fstest_bbefd481ec972e7d9e1ee36e7b804ff7
0755
not ok 10
  - -u 65534 -g 65534 rmdir
fstest_2d073a008fe0cefa4b6b60fa0a939995/fstest_bbefd481ec972e7d9e1ee36e7b804ff7
ok 11
ok 12
Failed 4/12 subtests

Test Summary Report
-------------------
/home/james/Projects/AppTools/appfs/../fstest/tests/mkdir/05.t (Wstat: 0
Tests: 12 Failed: 4)
  Failed tests:  4-5, 9-10
Files=1, Tests=12,  8 wallclock secs ( 0.12 usr  0.06 sys +  0.54 cusr
 1.56 csys =  2.28 CPU)
Result: FAIL

Note that it fails only the tests that change the UID / GID (this test is
being run as root and the filesystem is mounted as root).

I am supplying the filesystem with no mount options (so neither
default_permissions nor allow_other) however the mkdir and rmdir requests
never hit my user code.  Is there something I'm not understanding about
FUSE that's going to prevent this from working correctly (is it even
possible to fully test a FUSE filesystem for POSIX compliance given the
security requirements)?

Regards, James Rhodes.
Redpoint Software

http://about.me/james.rhodes