[LU-14510] FIEMAP does not work on DoM files

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.14.0, Lustre 2.12.6, Lustre 2.15.0
• Labels: DoM2 e2fsprogs
• Severity: 3
• Assignee: Mikhail Pershin
• Reporter: Andreas Dilger

Description

Creating a DoM PFL file and then running "filefrag -v" on it (ioctl(FIEMAP)) does not work:

# lfs setstripe -E 1M -L mdt -E 16m -c 4 -E eof -c -1 /mnt/testfs/dom-pfl
# dd if=/dev/zero of=/mnt/testfs/dom-pfl2 bs=1M count=1
# filefrag -v /mnt/testfs/dom-pfl2
Filesystem type is: bd00bd0
File size of /mnt/testfs/dom-pfl2 is 1048576 (1024 blocks of 1024 bytes)
/mnt/testfs/dom-pfl2: FIBMAP unsupported

The "FIBMAP unsupported" message is a bit misleading, since it tries FIEMAP first, but falls back to FIBMAP if that doesn't work.

Issue Links

• is related to: LU-11848 filefrag/FIEMAP doesn't work for PFL or FLR files