[Tracker] Problems with removable volume support

[Philip Van Hoof <philip codeminded be>]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi guys,

Here are the problems we've seen with removable volume support:

Some platforms don't use udisk2 and/or gvfs so they fall back to the
implementations behind gio/gunix*c. These implementations aren't
always very reliable. In particular is the UUID of the volume not
always correct with those implementations. It would be nicer if we
could let something external to tracker-miner-fs fed us with that UUID
and mount point name upon mount event, rather than using GVolumeMonitor.

Some platforms use a tmpfs for the parent directory of the mount point
subdirectories. After each reboot the last modification time of that
tmpfs will or can differ and tracker-miner-fs sometimes gets confused
about that.

Some platforms will make a unique directory upfront mounting, for
example /media/sdcard/$UUID_OF_DEV/, when /media/sdcard is in the
index-recursive-directories configuration the mount event handler
sometimes causes a race condition with the mkdir handler of
/media/sdcard/$UUID_OF_DEV/.

When the index-recursive-directories contains a parent dir of a mount
point subdir and indexing removable volumes is turned on, there's a
race between unmount event and the file monitoring seeing files being
removed (as a result of the unmount presumably). I'd say mount point
subdirs should be added to ignore list automatically and handled by
the removable volume support exclusively.

Kind regards,

Philip
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.20 (MingW32)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iQEcBAEBAgAGBQJTIZxjAAoJEEP2NSGEz4aDydgH/2ZtLNFmIAToqA6UXytnMoBD
dXPvV5FVJ8xv7q2B5bFnXUJaIkM8uaCnGLSm7pvOSbpGzPE14cwWmV27uBoNc7/z
e/OxRnPYU8TVjaOjGL4gmNEzFuu+nj5DAQhIGZN5ewDflrAiuIvbMHpp5TDXtlBK
NkRlYJl0+FM1MDcljcKZpQndkyuxpyZqoGMuzwVuNz9zB6ZrbQkH9QxI+ClHMs47
yHcL60Xl7pDWNR+aI0xzHEPQyr3dxmVMl8Tx21dQULrx0YeE+izycUGFxRB7Fn3p
LphtuWAnbRx8dCdUakm07nR3vwIKXL1e2fbI+UzGpzObRSk9foUdHm6OrtHck5Y=
=NAg5
-----END PGP SIGNATURE-----