[LU-17468] --component-add lose pattern setting

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.16.0
• Severity: 3
• Assignee: Zhenyu Xu
• Reporter: Zhenyu Xu

Description

--component-add lose the necessary component setting, for example

# lfs setstripe -E 1M -L mdt /mnt/testfs/short
 # lfs setstripe --component-add -E 1G -C 100 /mnt/testfs/short
 # lfs getstripe /mnt/testfs/short
 /mnt/testfs/short
  lcm_layout_gen:    2
  lcm_mirror_count:  1
  lcm_entry_count:   2
    lcme_id:             1
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  0
      lmm_stripe_size:   1048576
      lmm_pattern:       mdt
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
    lcme_id:             2
    lcme_mirror_id:      0
    lcme_flags:          0
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   1073741824
      lmm_stripe_count:  100
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: -1
 # dd if=/dev/zero of=/mnt/testfs/short bs=1M count=10
 10+0 records in
 10+0 records out
 10485760 bytes (10 MB) copied, 0.661196 s, 15.9 MB/s
 # lfs getstripe /mnt/testfs/short
 /mnt/testfs/short
  lcm_layout_gen:    3
  lcm_mirror_count:  1
  lcm_entry_count:   2
    lcme_id:             1
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 0
    lcme_extent.e_end:   1048576
      lmm_stripe_count:  0
      lmm_stripe_size:   1048576
      lmm_pattern:       mdt
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
    lcme_id:             2
    lcme_mirror_id:      0
    lcme_flags:          init
    lcme_extent.e_start: 1048576
    lcme_extent.e_end:   1073741824
      lmm_stripe_count:  4
      lmm_stripe_size:   1048576
      lmm_pattern:       raid0
      lmm_layout_gen:    0
      lmm_stripe_offset: 0
      lmm_objects:
      - 0: { l_ost_idx: 0, l_fid: [0x300000403:0x5b3:0x0] }
      - 1: { l_ost_idx: 1, l_fid: [0x340000403:0x5b3:0x0] }
      - 2: { l_ost_idx: 2, l_fid: [0x380000403:0x5b4:0x0] }
      - 3: { l_ost_idx: 3, l_fid: [0x3c0000403:0x5b4:0x0] }