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社区首页 >专栏 >xfs文件系统xfs_quota配额设置（2）- 配置信息存储位置探究

xfs文件系统xfs_quota配额设置（2）- 配置信息存储位置探究

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skystone
发布于 2025-11-20 17:01:56
发布于 2025-11-20 17:01:56
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文章被收录于专栏：用户8442365的专栏用户8442365的专栏

xfs文件系统xfs_quota配额设置（2）- 配置信息存储位置探究

xfs文件系统中有专门的inode存储xfs_quota配额信息，另外，被约束了project配额的目录和文件，在inode元数据中，也会有project id属性。

所以即使没有/etc/projects这些配置文件，服务器重启后，配额限制也不会被取消。

下面样例为project配额方式下查看quota配置信息。

1. 使用xfs_db的dquot指令直接查看某个project

代码语言：shell
复制
xfs_quota -x -c 'report' /dev/sdb1命令，查看project id列表和Limit。

    [root@n11b-sata4000 ~]# xfs_quota -x -c 'report' /dev/sdb1
    Project quota on /datb (/dev/sdb1)
                                Blocks                     
    Project ID       Used       Soft       Hard    Warn/Grace     
    ---------- -------------------------------------------------- 
    #0                  0          0          0     00 [--------]
    #65         838989988          0 1073741824     00 [--------]
    #70        5707854264          0 6442450944     00 [--------]
    #75          86060848          0 1073741824     00 [--------]

下面通过xfs_db来查看指定project id的quota配置，与xfs_quota命令输出结果进行比对。

xfs_db -r /dev/sdb1命令，进入xfs_db交互环境。

dquot指令会将指针移动到quote block。然后我们再通过print指令查看对应block的数据。

代码语言：shell
复制
    xfs_db> dquot
    bad argument count 0 to dquot, expected between 1 and 2 arguments
    xfs_db> dquot -p 65
    xfs_db> p
    diskdq.magic = 0x4451
    diskdq.version = 0x1
    diskdq.flags = 0x2
    diskdq.id = 65
    diskdq.blk_hardlimit = 268435456
    diskdq.blk_softlimit = 0
    diskdq.ino_hardlimit = 0
    diskdq.ino_softlimit = 0
    diskdq.bcount = 209596326
    diskdq.icount = 79006
    diskdq.itimer = 0
    diskdq.btimer = 0
    diskdq.iwarns = 0
    diskdq.bwarns = 0
    diskdq.rtb_hardlimit = 0
    diskdq.rtb_softlimit = 0
    diskdq.rtbcount = 0
    diskdq.rtbtimer = 0
    diskdq.rtbwarns = 0
    crc = 0xd01d9e6f (correct)
    lsn = 0x9900318fc0
    uuid = 2c74c638-4645-48c1-822b-d99499823932

注意，该project的配额限制是实际是1TB。

dquot指令看到的hardlimit是268435456 blks。1 blk为4096Bytes，即4KB。

xfs_quota命令看到的hardlimit是1073741824 blks, 该命令blks的单位是1KB。

2. 直接看data

2.1. 查看superblock中dquot所在inode编号

代码语言：shell
复制
    xfs_db> sb
    xfs_db> p
    magicnum = 0x58465342
    blocksize = 4096
    dblocks = 6835933184
    rblocks = 0
    rextents = 0
    uuid = 2c74c638-4645-48c1-822b-d99499823932
    logstart = 4294967304
    rootino = 1024
    rbmino = 1025
    rsumino = 1026
    rextsize = 1
    agblocks = 213622912
    agcount = 32
    rbmblocks = 0
    logblocks = 521728
    versionnum = 0xb5e5
    sectsize = 512
    inodesize = 512
    inopblock = 8
    fname = "\000\000\000\000\000\000\000\000\000\000\000\000"
    blocklog = 12
    sectlog = 9
    inodelog = 9
    inopblog = 3
    agblklog = 28
    rextslog = 0
    inprogress = 0
    imax_pct = 5
    icount = 82880
    ifree = 1044
    fdblocks = 5184855878
    frextents = 0
    uquotino = null
    gquotino = null
    qflags = 0x608
    flags = 0
    shared_vn = 0
    inoalignmt = 4
    unit = 128
    width = 64
    dirblklog = 0
    logsectlog = 0
    logsectsize = 0
    logsunit = 32768
    features2 = 0x18a
    bad_features2 = 0x18a
    features_compat = 0
    features_ro_compat = 0
    features_incompat = 0x1
    features_log_incompat = 0
    crc = 0xda95173e (correct)
    spino_align = 0
    pquotino = 1027
    lsn = 0x9900319280
    meta_uuid = 00000000-0000-0000-0000-000000000000

pquotino = 1027，该值表示project quota信息所在的inode值

2.2. 移动指针到该inode

代码语言：shell
复制
    xfs_db> inode 1027
    xfs_db> p
    core.magic = 0x494e
    core.mode = 0100000
    core.version = 3
    core.format = 2 (extents)
    core.nlinkv2 = 1
    core.onlink = 0
    core.projid_lo = 0
    core.projid_hi = 0
    core.uid = 0
    core.gid = 0
    core.flushiter = 0
    core.atime.sec = Fri Dec 13 19:36:38 2024
    core.atime.nsec = 659545008
    core.mtime.sec = Fri Dec 13 19:36:38 2024
    core.mtime.nsec = 659545008
    core.ctime.sec = Fri Dec 13 19:36:38 2024
    core.ctime.nsec = 659545008
    core.size = 0
    core.nblocks = 2
    core.extsize = 0
    core.nextents = 2
    core.naextents = 0
    core.forkoff = 0
    core.aformat = 2 (extents)
    core.dmevmask = 0
    core.dmstate = 0
    core.newrtbm = 0
    core.prealloc = 0
    core.realtime = 0
    core.immutable = 0
    core.append = 0
    core.sync = 0
    core.noatime = 0
    core.nodump = 0
    core.rtinherit = 0
    core.projinherit = 0
    core.nosymlinks = 0
    core.extsz = 0
    core.extszinherit = 0
    core.nodefrag = 0
    core.filestream = 0
    core.gen = 755468223
    next_unlinked = null
    v3.crc = 0x3789a69b (correct)
    v3.change_count = 4
    v3.lsn = 0x1000001c0
    v3.flags2 = 0
    v3.crtime.sec = Fri Dec 13 19:36:38 2024
    v3.crtime.nsec = 659545008
    v3.inumber = 1027
    v3.uuid = 2c74c638-4645-48c1-822b-d99499823932
    u3.bmx[0-1] = [startoff,startblock,blockcount,extentflag] 0:[0,127,1,0] 1:[2,126,1,0]

2.3. 查看该inode的数据

代码语言：shell
复制
    core.format = 2 (extents)
    u3.bmx[0-1] = [startoff,startblock,blockcount,extentflag] 0:[0,127,1,0] 1:[2,126,1,0]

u3.bmx值表示该inode数据部分占用了2个block，分别为0,127,1,0和2,126,1,0。

也就是block 127和block 126。

移动指针到block 126，查看内容。1个sector是512Bytes，1个block是8个sector，4KB。

代码语言：shell
复制
    xfs_db> fsblock 126
    xfs_db> p
    000: 44510102 0000003c 00000000 00000000 00000000 00000000 00000000 00000000
    020: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    040: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    060: 00000000 00000000 00000000 837cd8e3 00000000 00000000 2c74c638 464548c1
    080: 822bd994 99823932 44510102 0000003d 00000000 00000000 00000000 00000000
    0a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    0c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    0e0: 00000000 00000000 00000000 00000000 00000000 1c2bc1a0 00000000 00000000
    100: 2c74c638 464548c1 822bd994 99823932 44510102 0000003e 00000000 00000000
    120: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    140: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    160: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 bdd3ea65
    180: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 0000003f
    1a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    1c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    1e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    200: 00000000 2284f326 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    220: 44510102 00000040 00000000 00000000 00000000 00000000 00000000 00000000
    240: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    260: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    280: 00000000 00000000 00000000 986bbc0b 00000000 00000000 2c74c638 464548c1
    2a0: 822bd994 99823932 44510102 00000041 00000000 10000000 00000000 00000000
    2c0: 00000000 00000000 00000000 00000000 00000000 0c7e2fa6 00000000 0001349e
    2e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    300: 00000000 00000000 00000000 00000000 00000000 40228da9 00000099 00319240
    320: 2c74c638 464548c1 822bd994 99823932 44510102 00000042 00000000 00000000
    340: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    360: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    380: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 a6c48e8d
    3a0: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 00000043
    3c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    3e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    400: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    420: 00000000 399397ce 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    440: 44510102 00000044 00000000 00000000 00000000 00000000 00000000 00000000
    460: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    480: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    4a0: 00000000 00000000 00000000 15433502 00000000 00000000 2c74c638 464548c1
    4c0: 822bd994 99823932 44510102 00000045 00000000 00000000 00000000 00000000
    4e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    500: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    520: 00000000 00000000 00000000 00000000 00000000 8a142c41 00000000 00000000
    540: 2c74c638 464548c1 822bd994 99823932 44510102 00000046 00000000 60000000
    560: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 550dbcb4
    580: 00000000 00000adc 00000000 00000000 00000000 00000000 00000000 00000000
    5a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 81ac527e
    5c0: 00000095 00205680 2c74c638 464548c1 822bd994 99823932 44510102 00000047
    5e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    600: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    620: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    640: 00000000 b4bb1ec7 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    660: 44510102 00000048 00000000 00000000 00000000 00000000 00000000 00000000
    680: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    6a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    6c0: 00000000 00000000 00000000 823aae18 00000000 00000000 2c74c638 464548c1
    6e0: 822bd994 99823932 44510102 00000049 00000000 00000000 00000000 00000000
    700: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    720: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    740: 00000000 00000000 00000000 00000000 00000000 1d6db75b 00000000 00000000
    760: 2c74c638 464548c1 822bd994 99823932 44510102 0000004a 00000000 00000000
    780: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    7a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    7c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 bc959c9e
    7e0: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 0000004b
    800: 00000000 10000000 00000000 00000000 00000000 00000000 00000000 00000000
    820: 00000000 00d54566 00000000 0000002e 00000000 00000000 00000000 00000000
    840: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    860: 00000000 e3b06332 00000099 003190c0 2c74c638 464548c1 822bd994 99823932
    880: 44510102 0000004c 00000000 00000000 00000000 00000000 00000000 00000000
    8a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    8c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    8e0: 00000000 00000000 00000000 0f122711 00000000 00000000 2c74c638 464548c1
    900: 822bd994 99823932 44510102 0000004d 00000000 00000000 00000000 00000000
    920: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    940: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    960: 00000000 00000000 00000000 00000000 00000000 90453e52 00000000 00000000
    980: 2c74c638 464548c1 822bd994 99823932 44510102 0000004e 00000000 00000000
    9a0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    9c0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    9e0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 31bd1597
    a00: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 0000004f
    a20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    a40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    a60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    a80: 00000000 aeea0cd4 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    aa0: 44510102 00000050 00000000 00000000 00000000 00000000 00000000 00000000
    ac0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    ae0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    b00: 00000000 00000000 00000000 acc9982d 00000000 00000000 2c74c638 464548c1
    b20: 822bd994 99823932 44510102 00000051 00000000 00000000 00000000 00000000
    b40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    b60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    b80: 00000000 00000000 00000000 00000000 00000000 339e816e 00000000 00000000
    ba0: 2c74c638 464548c1 822bd994 99823932 44510102 00000052 00000000 00000000
    bc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    be0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    c00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 9266aaab
    c20: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 00000053
    c40: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    c60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    c80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    ca0: 00000000 0d31b3e8 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    cc0: 44510102 00000054 00000000 00000000 00000000 00000000 00000000 00000000
    ce0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    d00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    d20: 00000000 00000000 00000000 21e11124 00000000 00000000 2c74c638 464548c1
    d40: 822bd994 99823932 44510102 00000055 00000000 00000000 00000000 00000000
    d60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    d80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    da0: 00000000 00000000 00000000 00000000 00000000 beb60867 00000000 00000000
    dc0: 2c74c638 464548c1 822bd994 99823932 44510102 00000056 00000000 00000000
    de0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    e00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    e20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 1f4e23a2
    e40: 00000000 00000000 2c74c638 464548c1 822bd994 99823932 44510102 00000057
    e60: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    e80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    ea0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    ec0: 00000000 80193ae1 00000000 00000000 2c74c638 464548c1 822bd994 99823932
    ee0: 44510102 00000058 00000000 00000000 00000000 00000000 00000000 00000000
    f00: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    f20: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    f40: 00000000 00000000 00000000 b6988a3e 00000000 00000000 2c74c638 464548c1
    f60: 822bd994 99823932 44510102 00000059 00000000 00000000 00000000 00000000
    f80: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    fa0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
    fc0: 00000000 00000000 00000000 00000000 00000000 29cf937d 00000000 00000000
    fe0: 2c74c638 464548c1 822bd994 99823932 00000000 00000000 00000000 00000000

查看当前地址

代码语言：shell
复制
    xfs_db> addr
    current
        byte offset 516096, length 4096
        buffer block 1008 (fsbno 126), 8 bbs
        inode 1027, dir inode -1, type data

addr指令解释

代码语言：shell
复制
    xfs_db> addr
    current
        byte offset 516096, length 4096
        buffer block 1008 (fsbno 126), 8 bbs
        inode 1027, dir inode -1, type data

buffer block编号，是磁盘sector地址编号，磁盘sector为512Bytes

fsbno为文件系统block编号，1个block是8个sector，所以buffer block number = 8* fsbno.

byte offset = fsbno * 4096.

修改展示类型为dqblk，查看各字段内容。这里只会打印第1条记录。每条记录占136字节。

代码语言：shell
复制
    xfs_db> type dqblk
    xfs_db> p
    diskdq.magic = 0x4451
    diskdq.version = 0x1
    diskdq.flags = 0x2
    diskdq.id = 60
    diskdq.blk_hardlimit = 0
    diskdq.blk_softlimit = 0
    diskdq.ino_hardlimit = 0
    diskdq.ino_softlimit = 0
    diskdq.bcount = 0
    diskdq.icount = 0
    diskdq.itimer = 0
    diskdq.btimer = 0
    diskdq.iwarns = 0
    diskdq.bwarns = 0
    diskdq.rtb_hardlimit = 0
    diskdq.rtb_softlimit = 0
    diskdq.rtbcount = 0
    diskdq.rtbtimer = 0
    diskdq.rtbwarns = 0
    crc = 0x837cd8e3 (correct)
    lsn = 0
    uuid = 2c74c638-4645-48c1-822b-d99499823932

2.4. dqblk字段解释

代码语言：shell
复制
    dqblk  The quota information is stored in files referred to by the
            superblock uquotino and pquotino fields. Each filesystem
            block in a quota file contains a constant number of quota
            entries. The quota entry size is currently 136 bytes, so
            with a 4KiB filesystem block size there are 30 quota
            entries per block. The dquot command is used to locate
            these entries in the filesystem.  The file entries are
            indexed by the user or project identifier to determine the
            block and offset.  Each quota entry has the following
            fields:
                    magic  magic number, 0x4451 ('DQ').
                    version
                        version number, currently 1.
                    flags  flags, values include 0x01 for user quota,
                        0x02 for project quota.
                    id     user or project identifier.
                    blk_hardlimit
                        absolute limit on blocks in use.
                    blk_softlimit
                        preferred limit on blocks in use.
                    ino_hardlimit
                        absolute limit on inodes in use.
                    ino_softlimit
                        preferred limit on inodes in use.
                    bcount blocks actually in use.
                    icount inodes actually in use.
                    itimer time when service will be refused if soft
                        limit is violated for inodes.
                    btimer time when service will be refused if soft
                        limit is violated for blocks.
                    iwarns number of warnings issued about inode limit
                        violations.
                    bwarns number of warnings issued about block limit
                        violations.
                    rtb_hardlimit
                        absolute limit on realtime blocks in use.
                    rtb_softlimit
                        preferred limit on realtime blocks in use.
                    rtbcount
                        realtime blocks actually in use.
                    rtbtimer
                        time when service will be refused if soft
                        limit is violated for realtime blocks.
                    rtbwarns
                        number of warnings issued about realtime
                        block limit violations.

各字段含义和所占字节数在fs/xfs/libxfs/xfs_format.h中定义。

代码语言：c
复制
    /*
    * This is the main portion of the on-disk representation of quota
    * information for a user. This is the q_core of the struct xfs_dquot that
    * is kept in kernel memory. We pad this with some more expansion room
    * to construct the on disk structure.
    */
    struct xfs_disk_dquot {
        __be16		d_magic;	/* dquot magic = XFS_DQUOT_MAGIC */
        __u8		d_version;	/* dquot version */
        __u8		d_flags;	/* XFS_DQ_USER/PROJ/GROUP */
        __be32		d_id;		/* user,project,group id */
        __be64		d_blk_hardlimit;/* absolute limit on disk blks */
        __be64		d_blk_softlimit;/* preferred limit on disk blks */
        __be64		d_ino_hardlimit;/* maximum # allocated inodes */
        __be64		d_ino_softlimit;/* preferred inode limit */
        __be64		d_bcount;	/* disk blocks owned by the user */
        __be64		d_icount;	/* inodes owned by the user */
        __be32		d_itimer;	/* zero if within inode limits if not,
                        this is when we refuse service */
        __be32		d_btimer;	/* similar to above; for disk blocks */
        __be16		d_iwarns;	/* warnings issued wrt num inodes */
        __be16		d_bwarns;	/* warnings issued wrt disk blocks */
        __be32		d_pad0;		/* 64 bit align */
        __be64		d_rtb_hardlimit;/* absolute limit on realtime blks */
        __be64		d_rtb_softlimit;/* preferred limit on RT disk blks */
        __be64		d_rtbcount;	/* realtime blocks owned */
        __be32		d_rtbtimer;	/* similar to above; for RT disk blocks */
        __be16		d_rtbwarns;	/* warnings issued wrt RT disk blocks */
        __be16		d_pad;
    };

3. 查看设置了quota的目录下的文件inode元数据

代码语言：shell
复制
    xfs_db> inode 34364113976
    xfs_db> p
    core.magic = 0x494e
    core.mode = 0100644
    core.version = 3
    core.format = 2 (extents)
    core.nlinkv2 = 1
    core.onlink = 0
    core.projid_lo = 65
    core.projid_hi = 0
    core.uid = 0
    core.gid = 0
    core.flushiter = 0
    core.atime.sec = Wed Sep 24 15:29:49 2025
    core.atime.nsec = 579983170
    core.mtime.sec = Wed Sep 24 15:29:49 2025
    core.mtime.nsec = 768987513
    core.ctime.sec = Wed Sep 24 15:29:49 2025
    core.ctime.nsec = 768987513
    core.size = 498020
    core.nblocks = 122
    core.extsize = 0
    core.nextents = 1
    core.naextents = 0
    core.forkoff = 0
    core.aformat = 2 (extents)
    core.dmevmask = 0
    core.dmstate = 0
    core.newrtbm = 0
    core.prealloc = 0
    core.realtime = 0
    core.immutable = 0
    core.append = 0
    core.sync = 0
    core.noatime = 0
    core.nodump = 0
    core.rtinherit = 0
    core.projinherit = 0
    core.nosymlinks = 0
    core.extsz = 0
    core.extszinherit = 0
    core.nodefrag = 0
    core.filestream = 0
    core.gen = 2598271720
    next_unlinked = null
    v3.crc = 0x3c4e2b83 (correct)
    v3.change_count = 9
    v3.lsn = 0x580003fe80
    v3.flags2 = 0
    v3.crtime.sec = Wed Sep 24 15:29:49 2025
    v3.crtime.nsec = 579983170
    v3.inumber = 34364113976
    v3.uuid = 2c74c638-4645-48c1-822b-d99499823932
    u3.bmx[0] = [startoff,startblock,blockcount,extentflag] 0:[0,4295514258,122,0]

可见，core.projid_lo = 65，即配置项目ID为65，该文件受到project 65的配额限制约束。

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

文件系统
linux
文件存储
linux运维

原创声明：本文系作者授权腾讯云开发者社区发表，未经许可，不得转载。

如有侵权，请联系 cloudcommunity@tencent.com 删除。

文件系统
linux
文件存储
linux运维
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目录
  • 1. 使用xfs_db的dquot指令直接查看某个project
  • 2. 直接看data
    • 2.1. 查看superblock中dquot所在inode编号
    • 2.2. 移动指针到该inode
    • 2.3. 查看该inode的数据
    • 2.4. dqblk字段解释
  • 3. 查看设置了quota的目录下的文件inode元数据
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