[LU-1746] osd_xattr_list() in osd-zfs returns -ERANGE for LU_BUF_NULL

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.4.0
• Affects Version/s: Lustre 2.4.0
• Severity: 3
• Assignee: Minh Diep
• Reporter: Li Wei (Inactive)

Description

osd-zfs's osd_xattr_list(), when called in the mdt_getxattr_pack_reply() path, returns -ERANGE for the valid size query. This could lead to failures in sanity 17k and 56w. The function should return the size of the xattr list if the caller passes in a NULL buffer.