quota

package
v0.0.0-...-7ef7dd6 Latest Latest
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 Go to latest Published: Sep 10, 2018 License: Apache-2.0 Imports: 16 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	// QuotaMinID represents the minimize quota id.
	// The value is unit32(2^24).
	QuotaMinID = uint32(16777216)
)

Variables

View Source 
var (

	// GQuotaDriver represents global quota driver.
	GQuotaDriver = NewQuotaDriver("")
)

Functions

func CheckMountpoint 

func CheckMountpoint(devID uint64) (string, bool, string)

CheckMountpoint is used to check mount point.

func GetDefaultQuota 

func GetDefaultQuota(quotas map[string]string) string

GetDefaultQuota returns the default quota size.

func GetNextQuotaID 

func GetNextQuotaID() (uint32, error)

GetNextQuotaID returns the next available quota id.

func GetQuotaIDInFileAttr 

func GetQuotaIDInFileAttr(dir string) uint32

GetQuotaIDInFileAttr returns the directory attributes of quota ID.

func SetDiskQuota 

func SetDiskQuota(dir string, size string, quotaID uint32) error

SetDiskQuota is used to set quota for directory.

func SetQuotaDriver 

func SetQuotaDriver(name string)

SetQuotaDriver is used to set global quota driver.

func SetQuotaIDInFileAttr 

func SetQuotaIDInFileAttr(dir string, id uint32) error

SetQuotaIDInFileAttr is used to set file attributes of quota ID.

func SetQuotaIDInFileAttrNoOutput 

func SetQuotaIDInFileAttrNoOutput(dir string, quotaID uint32)

SetQuotaIDInFileAttrNoOutput is used to set file attribute of quota ID without error.

func SetRootfsDiskQuota 

func SetRootfsDiskQuota(basefs, size string, quotaID uint32) (uint32, error)

SetRootfsDiskQuota is to set container rootfs dir disk quota.

func SetSubtree 

func SetSubtree(dir string, qid uint32) (uint32, error)

SetSubtree is used to set quota id for directory.

func StartQuotaDriver 

func StartQuotaDriver(dir string) (string, error)

StartQuotaDriver is used to start quota driver.

Types

type BaseQuota 

type BaseQuota interface {
	// EnforceQuota is used to enforce disk quota effect on specified directory.
	EnforceQuota(dir string) (string, error)

	// SetSubtree sets quota for container root dir which is a subtree of host's dir mapped on a device.
	SetSubtree(dir string, qid uint32) (uint32, error)

	// SetDiskQuota uses the following two parameters to set disk quota for a directory.
	// * quota size: a byte size of requested quota.
	// * quota ID: an ID represent quota attr which is used in the global scope.
	SetDiskQuota(dir string, size string, quotaID uint32) error

	// CheckMountpoint is used to check mount point.
	// It returns mointpoint, enable quota and filesystem type of the device.
	CheckMountpoint(devID uint64) (string, bool, string)

	// GetQuotaIDInFileAttr gets attributes of the file which is in the inode.
	// The returned result is quota ID.
	GetQuotaIDInFileAttr(dir string) uint32

	// SetQuotaIDInFileAttr sets file attributes of quota ID for the input directory.
	// The input attributes is quota ID.
	SetQuotaIDInFileAttr(dir string, quotaID uint32) error

	// SetQuotaIDInFileAttrNoOutput sets file attributes of quota ID for the input directory without returning error if exists.
	// The input attributes is quota ID.
	SetQuotaIDInFileAttrNoOutput(dir string, quotaID uint32)

	// GetNextQuotaID gets next quota ID in global scope of host.
	GetNextQuotaID() (uint32, error)
}

BaseQuota defines the quota operation interface. It abstracts the common operation ways a quota driver should implement.

func NewQuotaDriver 

func NewQuotaDriver(name string) BaseQuota

NewQuotaDriver returns a quota instance.

type GrpQuotaDriver 

type GrpQuotaDriver struct {
	// contains filtered or unexported fields
}

GrpQuotaDriver represents group quota driver.

func (*GrpQuotaDriver) CheckMountpoint 

func (quota *GrpQuotaDriver) CheckMountpoint(devID uint64) (string, bool, string)

CheckMountpoint is used to check mount point. It returns mointpoint, enable quota and filesystem type of the device.

cat /proc/mounts as follows: /dev/sda3 / ext4 rw,relatime,data=ordered 0 0 /dev/sda2 /boot/grub2 ext4 rw,relatime,stripe=4,data=ordered 0 0 /dev/sda5 /home ext4 rw,relatime,data=ordered 0 0 /dev/sdb1 /home/pouch ext4 rw,relatime,prjquota,data=ordered 0 0 tmpfs /run tmpfs rw,nosuid,nodev,mode=755 0 0 tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0 cgroup /sys/fs/cgroup/cpuset,cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpuacct,cpu,cpuset 0 0 cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0 cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0 cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0

func (*GrpQuotaDriver) EnforceQuota 

func (quota *GrpQuotaDriver) EnforceQuota(dir string) (string, error)

EnforceQuota is used to enforce disk quota effect on specified directory.

func (*GrpQuotaDriver) GetNextQuotaID 

func (quota *GrpQuotaDriver) GetNextQuotaID() (uint32, error)

GetNextQuotaID returns the next available quota id.

func (*GrpQuotaDriver) GetQuotaIDInFileAttr 

func (quota *GrpQuotaDriver) GetQuotaIDInFileAttr(dir string) uint32

GetQuotaIDInFileAttr returns quota ID in the directory attributes. getfattr -n system.subtree --only-values --absolute-names /

func (*GrpQuotaDriver) SetDiskQuota 

func (quota *GrpQuotaDriver) SetDiskQuota(dir string, size string, quotaID uint32) error

SetDiskQuota is used to set quota for directory.

func (*GrpQuotaDriver) SetQuotaIDInFileAttr 

func (quota *GrpQuotaDriver) SetQuotaIDInFileAttr(dir string, id uint32) error

SetQuotaIDInFileAttr is used to set quota ID in file attributes.

func (*GrpQuotaDriver) SetQuotaIDInFileAttrNoOutput 

func (quota *GrpQuotaDriver) SetQuotaIDInFileAttrNoOutput(dir string, quotaID uint32)

SetQuotaIDInFileAttrNoOutput is used to set file attributes without error.

func (*GrpQuotaDriver) SetSubtree 

func (quota *GrpQuotaDriver) SetSubtree(dir string, qid uint32) (uint32, error)

SetSubtree is used to set quota id for directory, setfattr -n system.subtree -v $QUOTAID

type OverlayMount 

type OverlayMount struct {
	Merged string
	Lower  string
	Upper  string
	Work   string
}

OverlayMount represents the parameters of overlay mount.

type PrjQuotaDriver 

type PrjQuotaDriver struct {
	// contains filtered or unexported fields
}

PrjQuotaDriver represents project quota driver.

func (*PrjQuotaDriver) CheckMountpoint 

func (quota *PrjQuotaDriver) CheckMountpoint(devID uint64) (string, bool, string)

CheckMountpoint is used to check mount point. It returns mointpoint, enable quota and filesystem type of the device.

cat /proc/mounts as follows: /dev/sda3 / ext4 rw,relatime,data=ordered 0 0 /dev/sda2 /boot/grub2 ext4 rw,relatime,stripe=4,data=ordered 0 0 /dev/sda5 /home ext4 rw,relatime,data=ordered 0 0 /dev/sdb1 /home/pouch ext4 rw,relatime,prjquota,data=ordered 0 0 tmpfs /run tmpfs rw,nosuid,nodev,mode=755 0 0 tmpfs /sys/fs/cgroup tmpfs ro,nosuid,nodev,noexec,mode=755 0 0 cgroup /sys/fs/cgroup/cpuset,cpu,cpuacct cgroup rw,nosuid,nodev,noexec,relatime,cpuacct,cpu,cpuset 0 0 cgroup /sys/fs/cgroup/devices cgroup rw,nosuid,nodev,noexec,relatime,devices 0 0 cgroup /sys/fs/cgroup/memory cgroup rw,nosuid,nodev,noexec,relatime,memory 0 0 cgroup /sys/fs/cgroup/blkio cgroup rw,nosuid,nodev,noexec,relatime,blkio 0 0

func (*PrjQuotaDriver) EnforceQuota 

func (quota *PrjQuotaDriver) EnforceQuota(dir string) (string, error)

EnforceQuota is used to enforce disk quota effect on specified directory.

func (*PrjQuotaDriver) GetNextQuotaID 

func (quota *PrjQuotaDriver) GetNextQuotaID() (uint32, error)

GetNextQuotaID returns the next available quota id.

func (*PrjQuotaDriver) GetQuotaIDInFileAttr 

func (quota *PrjQuotaDriver) GetQuotaIDInFileAttr(dir string) uint32

GetQuotaIDInFileAttr gets attributes of the file which is in the inode. The returned result is quota ID. return 0 if failure happens, since quota ID must be positive. execution command: `lsattr -p $dir`

func (*PrjQuotaDriver) SetDiskQuota 

func (quota *PrjQuotaDriver) SetDiskQuota(dir string, size string, quotaID uint32) error

SetDiskQuota uses the following two parameters to set disk quota for a directory. * quota size: a byte size of requested quota. * quota ID: an ID represent quota attr which is used in the global scope.

func (*PrjQuotaDriver) SetQuotaIDInFileAttr 

func (quota *PrjQuotaDriver) SetQuotaIDInFileAttr(dir string, quotaID uint32) error

SetQuotaIDInFileAttr sets file attributes of quota ID for the input directory. The input attributes is quota ID.

func (*PrjQuotaDriver) SetQuotaIDInFileAttrNoOutput 

func (quota *PrjQuotaDriver) SetQuotaIDInFileAttrNoOutput(dir string, quotaID uint32)

SetQuotaIDInFileAttrNoOutput is used to set file attributes without error.

func (*PrjQuotaDriver) SetSubtree 

func (quota *PrjQuotaDriver) SetSubtree(dir string, qid uint32) (uint32, error)

SetSubtree is used to set quota id for substree dir which is container's root dir. For container, it has its own root dir. And this dir is a subtree of the host dir which is mapped to a device. chattr -p qid +P $QUOTAID

type RegExp 

type RegExp struct {
	Pattern *regexp.Regexp
	Path    string
	Size    string
}

RegExp defines the regular expression of disk quota.

Source Files

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