[LU-14897] "lfs setstripe/migrate" should check if pool exists for PFL components

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Etienne Aujames
• Reporter: Etienne Aujames

Description

The following scenario is possible:

[root@client client]# lfs setstripe -E100M -c1 -p flash -E-1  -p not_a_pool test 
[root@client client]# lfs getstripe test                                         
test                                                                             
  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:   104857600                                               
      lmm_stripe_count:  1                                                       
      lmm_stripe_size:   1048576                                                 
      lmm_pattern:       raid0                                                   
      lmm_layout_gen:    0                                                       
      lmm_stripe_offset: 1                                                       
      lmm_pool:          flash                                                   
      lmm_objects:                                                               
      - 0: { l_ost_idx: 1, l_fid: [0x100010000:0x83:0x0] }                       
                                                                                 
    lcme_id:             2                                                       
    lcme_mirror_id:      0                                                       
    lcme_flags:          0                                                       
    lcme_extent.e_start: 104857600                                               
    lcme_extent.e_end:   EOF                                                     
      lmm_stripe_count:  1                                                       
      lmm_stripe_size:   1048576                                                 
      lmm_pattern:       raid0                                                   
      lmm_layout_gen:    0                                                       
      lmm_stripe_offset: -1                                                      
      lmm_pool:          not_a_pool                                              
                                                                                 

"lfs" should check if the specified pool "not_a_pool" exists before generate and write the layout (trusted.lov) on the filesystem.

The issue does not exist with plain layout:

[root@client client]# lfs setstripe -c-1 -p not_a_pool test                    
lfs setstripe: pool 'lustrefs.not_a_pool' does not exist: Invalid argument (22)

Issue Links

• is related to: LU-11264 llapi_* routines demonstrate poor performance