targetcli: serialize multiple requests

Problem:
-------
targetcli/rtslib cannot handle parallel requests at the moment.
Read more about this at http://bit.ly/targetcli-parallel-requests-issue

$ for i in {1..10}; do \
 targetcli /backstores/fileio create ${i} /tmp/file${i} 10M& done

Created fileio 1 with size 10485760
This _Backstore already exists in configFS
This _Backstore already exists in configFS
This _Backstore already exists in configFS
This _Backstore already exists in configFS
This _Backstore already exists in configFS
Created fileio 6 with size 10485760
Created fileio 2 with size 10485760
This _Backstore already exists in configFS
Created fileio 8 with size 10485760
Created fileio 9 with size 10485760

bails-out most of the time with above errors and sometimes even crashes.

Solution:
--------
Serialize/defend the parallel requests by simply taking a wait lock at
targetcli level, so that only one request can be processed by targetcli at
any given point in time.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>

0 files changed, 0 insertions, 0 deletions