[LU-12169] Assertion on mdc_pack_name

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.13.0, Lustre 2.12.3
• Severity: 3
• Assignee: Wang Shilong (Inactive)
• Reporter: Wang Shilong (Inactive)

Description

If some race happen, dentry name which we copied is invalid,
we should return failure directly rather than continue.

Because Server doesn't support open-by-fid, we pass @name
as NULL, @len as 0, it will definitely trigger following
assertion in mdc_pack_name()

LustreError: 157839:0:(mdc_lib.c:137:mdc_pack_name()) LBUG

Issue Links

• is related to: LU-12020 LustreError: 32657:0:(mdc_lib.c:137:mdc_pack_name()) ASSERTION( lu_name_is_valid_2(buf, cpy_len) ) failed: