[LTP] quotactl0{2, 3, 5, 7}.c dependency problems on older kernels

[xuyang2018.jy@fujitsu.com]

Hi Petr
> Hi Petr
>> Hi Xu,
>>
>> actually quotactl0{2,3,5,7}.c and quotactl03.c fail on only on v4.5:
>>
>> tst_kconfig.c:82: TINFO: Parsing kernel config '/.config'
>> tst_device.c:88: TINFO: Found free device 0 '/dev/loop0'
>> tst_test.c:996: TINFO: Formatting /dev/loop0 with xfs opts='' extra opts=''
>> [  271.093416] XFS (loop0): Superblock has unknown read-only compatible features (0x4) enabled.
>> [  271.096902] XFS (loop0): Attempted to mount read-only compatible filesystem read-write.
>> [  271.100128] XFS (loop0): Filesystem can only be safely mounted read only.
>> [  271.101852] XFS (loop0): SB validate failed with error -22.
>> tst_test.c:1010: TBROK: mount(/dev/loop0, mntpoint, xfs, 0, 0x41d6a0) failed: EINVAL (22)
> That is because you use a newer xfsprogs (it provides newer mkfs.xfs and
> enable reflink feature by default[1]). But older kernel can't regcozine
> this feature bits[2](it supports reflink feature bits since kernel
> 4.9-rc1), then mount failed.
>
> [1]https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/commit/?id=ec1b42e6d58dcb7cfc5de6fc825832944997e176
> [2]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=f0ec1b8ef11df0a51954df7e3ff3ca4aadb0d34b
>
> I don't think this is a problem, user should know its kernel version
> and xfsprogs vesion. Linux distribution has sloved this well except you
> used yourself compiled kernel.
>
>>
>> Tested on config:
>> grep -e QUOTA -e QFMT /.config
>> CONFIG_XFS_QUOTA=y
>> CONFIG_QUOTA=y
>> CONFIG_QUOTA_NETLINK_INTERFACE=y
>> # CONFIG_PRINT_QUOTA_WARNING is not set
>> # CONFIG_QUOTA_DEBUG is not set
>> CONFIG_QUOTA_TREE=y
>> # CONFIG_QFMT_V1 is not set
>> CONFIG_QFMT_V2=y
>> CONFIG_QUOTACTL=y
>> CONFIG_QUOTACTL_COMPAT=y
>>
>> But not work either on v4.10:
>> [  299.235456] XFS (loop0): EXPERIMENTAL reflink feature enabled. Use at your own risk!
>> [  299.239463] XFS (loop0): Mounting V5 Filesystem
>> [  299.240950] XFS (loop0): Log size 1368 blocks too small, minimum size is 1580 blocks
> In xfstests, we use -lsize parameter[3] or use a value then get the
> correct value from error log[4]. reflink feature will increase log
> size[5], so we can disable reflink feature by using mkfs.xfs -m
> reflink=0 /dev/loop0 (it also need mkfs.xfs support, so we may need a
> mkfs.xfs cmd version check[5], if meet this version, use mkfs.xfs -m
> reflink=0, if less than this version, we can ignore this version and
> don't use mkfs.xfs extra option).
>
> Firstly, can you try mkfs.xfs -m reflink=0 way whether fix these  two
> problems?
>
You can also just increase dev_min_size to 512 to check whether fix this 
logsize problem.

Best Regards
Yang Xu
>
> [3]https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/commit/?id=7e07c4bebb08414ca8228ea91bdf57828fd4d110
> [4]https://git.kernel.org/pub/scm/fs/xfs/xfstests-dev.git/tree/common/xfs#n81
> [5]https://git.kernel.org/pub/scm/fs/xfs/xfsprogs-dev.git/commit/?id=a5132d9b3634fb6436d1f06642ceda82e64ea2f5
>
> Best Regards
> Yang Xu
>> [  299.243357] XFS (loop0): AAIEEE! Log failed size checks. Abort!
>> [  299.245183] XFS (loop0): log mount failed
>> quotactl07.c:58: TBROK: mount(/dev/loop0, mntpoint, xfs, 0, 0x41d054) failed: EINVAL (22)
>>
>> (the same config)
>>
>> Tests use:
>>
>> all:
>> .mntpoint = MNTPOINT,
>>
>> quotactl02.c
>> .mnt_data = "usrquota,grpquota",
>>
>> quotactl03.c
>> .mnt_data = "usrquota",
>>
>> quotactl05.c
>> .mnt_data = "prjquota"
>>
>> quotactl07.c does no specific .mnt_data.
>> but had .mnt_data = "usrquota" till recently - removed in
>> eb1cd3e922 ("syscalls/quotactl07: Refactor this case")
>>
>> I guess newer kernel is needed.
>> But checking usrquota for XFS it has "always" been there - added in
>> a67d7c5f5d25 ("[XFS] Move platform specific mount option parse out of core XFS code")
>> in v2.6.25-rc1
>>
>> Kind regards,
>> Petr
>