[LU-17013] FIEMAP_EXTENT_LAST is missed in some case

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.16.0, Lustre 2.15.5
• Severity: 3
• Assignee: Feng Lei
• Reporter: Feng Lei

Description

Call ioctl(fd, FS_IOC_FIEMAP, fiemap) to get the extents of a file. Given the file has N extents and fiemap->fm_extent_count is filled with exactly N, the last extent will not have FIEMAP_EXTENT_LAST flag.