[Linux-ha-dev] LRM Op Userdata

[Andrew Beekhof]

I have come across a problem with the LRM API...

lrm_op_t allows the caller to specify a blob of "user data".  This is 
not in itself a bad thing, the problem is when the caller (such as the 
CRM) exits and restarts and then tries to access the user data blob 
which is pointing at god knows what now.  Obviously not good.

I spoke with lmb on IRC and his suggestion was to require a 
user_data_len field so that the LRM can copy the blob.  However this 
still wont solve the problem if the object is not a basic C type.

The way I wish to use the user_data field is to carry a string, or an 
int which I can map to said string (I know the full set of strings I 
will use).

My preference would be to either make the type of user_data an int, or 
alternatively a char* and have the LRM make a copy it.  Of course you 
guys know the code best so maybe there is an even better option.

Andrew

--
Andrew Beekhof

"If it weren't for my horse, I wouldn't have spent that year in 
college" - Unknown, courtesy of Lewis Black