[LU-3602] make utility functions availalbe to user space

Related — Tue, 7 Jun 2016 15:38:10 +0000

In ~~LU-2973~~ we decided that user-space callers of lgetxattr() should be responsible for swabbing the value of "lustre.lov" as needed. This issue is to discuss how best to make utility functions (for swabbing, comparing, etc. of data structures like lov_user_md and lu_fid) available to both kernel and user space.

The swabbing functions are implemented in ptlrpc/pack_generic.c with extern declarations in lustre_idl.h. While these are compiled in a user-space library if liblustre is enabled, it would be nice to make them available in a generic way for liblustreapi (i.e. for ~~LU-2182~~). That is, liblustre should not be a dependency for liblustreapi. Perhaps such utility functions can be refactored into a generic library that can be linked to from kernel and user code.

Whamcloud Community JIRA

[LU-3602] make utility functions availalbe to user space