[dm-devel] [PATCH] multipathd: add map feature fix

[Tejaswini Poluri]

Hii,

Its found that the add map feature of multipathd tools is not working. i.e
its  not able to add the map again once removed. The following is the test
case:

*Case  : remove and add map.*
root at x86-generic-64:~# multipathd -k'show maps'
name    sysfs uuid
dmpath0 dm-0  1IET_00010001
root at x86-generic-64:~# multipathd -k'remove map dmpath0'
ok
root at x86-generic-64:~# multipathd -k'show maps'
root at x86-generic-64:~# multipathd -k'add map dmpath0'
ok
root at x86-generic-64:~# multipathd -k'show maps'
root at x86-generic-64:~#
Once a map is removed, we are able to add it only using #multipath  command
and not using multipathd tools.

I worked on a fix for the same and the following patch solves the problem.
There is also some unused code which could removed here in ev_add_map
function.
PFA the patches.

It would be great if the patches are reviewed. It would also help if
someone could share the procedure for submission of patches.

Regards,
Tejaswini
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