76 lines
1.6 KiB
Go
76 lines
1.6 KiB
Go
package fusekernel
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import (
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"fmt"
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)
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// Protocol is a FUSE protocol version number.
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type Protocol struct {
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Major uint32
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Minor uint32
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}
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func (p Protocol) String() string {
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return fmt.Sprintf("%d.%d", p.Major, p.Minor)
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}
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// LT returns whether a is less than b.
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func (a Protocol) LT(b Protocol) bool {
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return a.Major < b.Major ||
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(a.Major == b.Major && a.Minor < b.Minor)
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}
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// GE returns whether a is greater than or equal to b.
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func (a Protocol) GE(b Protocol) bool {
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return a.Major > b.Major ||
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(a.Major == b.Major && a.Minor >= b.Minor)
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}
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func (a Protocol) is79() bool {
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return a.GE(Protocol{7, 9})
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}
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// HasAttrBlockSize returns whether Attr.BlockSize is respected by the
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// kernel.
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func (a Protocol) HasAttrBlockSize() bool {
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return a.is79()
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}
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// HasReadWriteFlags returns whether ReadRequest/WriteRequest
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// fields Flags and FileFlags are valid.
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func (a Protocol) HasReadWriteFlags() bool {
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return a.is79()
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}
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// HasGetattrFlags returns whether GetattrRequest field Flags is
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// valid.
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func (a Protocol) HasGetattrFlags() bool {
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return a.is79()
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}
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func (a Protocol) is710() bool {
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return a.GE(Protocol{7, 10})
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}
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// HasOpenNonSeekable returns whether OpenResponse field Flags flag
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// OpenNonSeekable is supported.
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func (a Protocol) HasOpenNonSeekable() bool {
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return a.is710()
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}
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func (a Protocol) is712() bool {
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return a.GE(Protocol{7, 12})
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}
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// HasUmask returns whether CreateRequest/MkdirRequest/MknodRequest
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// field Umask is valid.
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func (a Protocol) HasUmask() bool {
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return a.is712()
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}
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// HasInvalidate returns whether InvalidateNode/InvalidateEntry are
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// supported.
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func (a Protocol) HasInvalidate() bool {
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return a.is712()
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}
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