[LU-11181] df -i and lfs df -i show incorrect inode count

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Affects Version/s: Lustre 2.10.3
• Severity: 2
• Assignee: Andreas Dilger
• Reporter: Mahmoud Hanafi

Description

lfs df -i and df -i doen't report correct inode counts.

On a newly created filesystem we have 2 MDTs. Here is the info on the MDTs.

nbp10-srv1 ~ # tune2fs -l /dev/mapper/nbp10_1-MDT0
tune2fs 1.42.13.wc6 (05-Feb-2017)
device /dev/dm-1 mounted by lustre
Filesystem volume name:   nbp10-MDT0000
Last mounted on:          /
Filesystem UUID:          bc01a76f-c04d-4f35-966b-e3e655a12528
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery mmp flex_bg dirdata sparse_super large_file huge_file uninit_bg dir_nlink extra_isize quota
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              4241293312
Block count:              3106406400
Reserved block count:     0
Free blocks:              2044739588
Free inodes:              4241293299
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      387
Blocks per group:         24000
Fragments per group:      24000
Inodes per group:         32768
Inode blocks per group:   8192
Flex block group size:    16
Filesystem created:       Wed Jul 25 21:43:46 2018
Last mount time:          Wed Jul 25 21:46:39 2018
Last write time:          Wed Jul 25 21:46:45 2018
Mount count:              3
Maximum mount count:      -1
Last checked:             Wed Jul 25 21:43:46 2018
Check interval:           0 (<none>)
Lifetime writes:          196 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               1024
Required extra isize:     32
Desired extra isize:      32
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      9b03f637-f156-4f57-aeff-e6872c65eb67
Journal backup:           inode blocks
MMP block number:         17822
MMP update interval:      5
User quota inode:         3
Group quota inode:        4


nbp10-srv3 ~ # tune2fs -l /dev/mapper/nbp10_2-MDT1
tune2fs 1.42.13.wc6 (05-Feb-2017)
device /dev/dm-0 mounted by lustre
Filesystem volume name:   nbp10-MDT0001
Last mounted on:          /
Filesystem UUID:          eb11a0e3-772a-4e83-9177-08d41210c8b7
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery mmp flex_bg dirdata sparse_super large_file huge_file uninit_bg dir_nlink extra_isize quota
Filesystem flags:         signed_directory_hash 
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              4241293312
Block count:              3106406400
Reserved block count:     0
Free blocks:              2044739588
Free inodes:              4241293299
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      387
Blocks per group:         24000
Fragments per group:      24000
Inodes per group:         32768
Inode blocks per group:   8192
Flex block group size:    16
Filesystem created:       Wed Jul 25 21:43:48 2018
Last mount time:          Wed Jul 25 21:46:39 2018
Last write time:          Wed Jul 25 21:46:45 2018
Mount count:              3
Maximum mount count:      -1
Last checked:             Wed Jul 25 21:43:48 2018
Check interval:           0 (<none>)
Lifetime writes:          196 MB
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               1024
Required extra isize:     32
Desired extra isize:      32
Journal inode:            8
Default directory hash:   half_md4
Directory Hash Seed:      76bf0136-01da-4bd1-b383-21d9ec90ee17
Journal backup:           inode blocks
MMP block number:         17822
MMP update interval:      5
User quota inode:         3
Group quota inode:        4

 

$ lfs df -i |grep nobackupp10 |grep -e summary -e MDT
nbp10-MDT0000_UUID 4241293312 351 4241292961 0% /nobackupp10[MDT:0]
nbp10-MDT0001_UUID 4241293312 337 4241292975 0% /nobackupp10[MDT:1]
filesystem_summary: 429501508 688 429500820 0% /nobackupp10

$ df -i /nobackupp10
Filesystem Inodes IUsed IFree IUse% Mounted on
10.151.26.159@o2ib:10.151.26.160@o2ib:/nbp10 429501508 688 429500820 1% /nobackupp10

Issue Links

• is related to: LUDOC-458 Inode ratio size ldiskfs