[LU-12332] Add a liblustreapi call for IOC_MDC_GETFILEINFO

• Type: Improvement
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.14.0, Lustre 2.12.4
• Assignee: WC Triage
• Reporter: Aurelien Degremont (Inactive)

Description

IOC_MDC_GETFILEINFO is a very convenient ioctl to retrieve metadata information (stat + lov EA v1) from MDT. This avoid going to OSTs if you don't need information stored over there (like file size).

This is wrapped by :

 int get_lmd_info_fd(char *path, int parent_fd, int dir_fd,
                     void *lmdbuf, int lmdlen, enum get_lmd_info_type type)

but this function is not exported and it could be nice to also add a llapi prefix.

Issue Links

• is related to: LU-11695 disabling the xattr cache on client for LSOM
• is related to: LU-11367 integrate LSOM with lfs find
• is related to: LU-10934 integrate statx() API with Lustre