[LU-12852] growing a PFL file with last stripe as -1 fails

• Type: Bug
• Resolution: Fixed
• Priority: Critical
• Fix Version/s: Lustre 2.14.0, Lustre 2.12.5
• Affects Version/s: Lustre 2.10.8
• Severity: 2
• Assignee: Emoly Liu
• Reporter: Mahmoud Hanafi

Description

If a file/dir is striped with last stripe count set to -1 growing the file fails.

$  lfs setstripe -E 256M -c 1 -E 16G -c 4 -E -1 -S 4M -c -1 pfldir
$  echo hello > pfldir/test
$ echo helpo >> pfldir/test 
-bash: echo: write error: No space left on device

$  lfs getstripe pfldir/test
pfldir/test
  lcm_layout_gen:    3
  lcm_mirror_count:  1
  lcm_entry_count:   3
    lcme_id:             1
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   268435456
      lmm_stripe_count:  1
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 313
      lmm_objects:
      - 0: { l_ost_idx: 313, l_fid: [0x101390000:0x110967ab:0x0] }

    lcme_id:             2
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 268435456
    lcme_extent.e_end:   17179869184
      lmm_stripe_count:  4
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1

    lcme_id:             3
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 17179869184
    lcme_extent.e_end:   EOF
      lmm_stripe_count:  -1
      lmm_stripe_size:   4194304
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1

$  lfs setstripe -E 256M -c 1 -E 16G -c 4 -E -1 -S 4M -c 10 pfldir
$  echo hello > pfldir/test
$  echo helpo >> pfldir/test 

This worked.