mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-15 02:40:23 +00:00
143 lines
3.3 KiB
Go
143 lines
3.3 KiB
Go
//go:build linux
|
|
// +build linux
|
|
|
|
package xattr
|
|
|
|
import (
|
|
"os"
|
|
"syscall"
|
|
|
|
"golang.org/x/sys/unix"
|
|
)
|
|
|
|
const (
|
|
// XATTR_SUPPORTED will be true if the current platform is supported
|
|
XATTR_SUPPORTED = true
|
|
|
|
XATTR_CREATE = unix.XATTR_CREATE
|
|
XATTR_REPLACE = unix.XATTR_REPLACE
|
|
|
|
// ENOATTR is not exported by the syscall package on Linux, because it is
|
|
// an alias for ENODATA. We export it here so it is available on all
|
|
// our supported platforms.
|
|
ENOATTR = syscall.ENODATA
|
|
)
|
|
|
|
// On Linux, FUSE and CIFS filesystems can return EINTR for interrupted system
|
|
// calls. This function works around this by retrying system calls until they
|
|
// stop returning EINTR.
|
|
//
|
|
// See https://github.com/golang/go/commit/6b420169d798c7ebe733487b56ea5c3fa4aab5ce.
|
|
func ignoringEINTR(fn func() error) (err error) {
|
|
for {
|
|
err = fn()
|
|
if err != unix.EINTR {
|
|
break
|
|
}
|
|
}
|
|
return err
|
|
}
|
|
|
|
func getxattr(path string, name string, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Getxattr(path, name, data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
func lgetxattr(path string, name string, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Lgetxattr(path, name, data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
func fgetxattr(f *os.File, name string, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Fgetxattr(int(f.Fd()), name, data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
func setxattr(path string, name string, data []byte, flags int) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Setxattr(path, name, data, flags)
|
|
})
|
|
}
|
|
|
|
func lsetxattr(path string, name string, data []byte, flags int) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Lsetxattr(path, name, data, flags)
|
|
})
|
|
}
|
|
|
|
func fsetxattr(f *os.File, name string, data []byte, flags int) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Fsetxattr(int(f.Fd()), name, data, flags)
|
|
})
|
|
}
|
|
|
|
func removexattr(path string, name string) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Removexattr(path, name)
|
|
})
|
|
}
|
|
|
|
func lremovexattr(path string, name string) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Lremovexattr(path, name)
|
|
})
|
|
}
|
|
|
|
func fremovexattr(f *os.File, name string) error {
|
|
return ignoringEINTR(func() (err error) {
|
|
return unix.Fremovexattr(int(f.Fd()), name)
|
|
})
|
|
}
|
|
|
|
func listxattr(path string, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Listxattr(path, data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
func llistxattr(path string, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Llistxattr(path, data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
func flistxattr(f *os.File, data []byte) (int, error) {
|
|
var r int
|
|
err := ignoringEINTR(func() (err error) {
|
|
r, err = unix.Flistxattr(int(f.Fd()), data)
|
|
return err
|
|
})
|
|
return r, err
|
|
}
|
|
|
|
// stringsFromByteSlice converts a sequence of attributes to a []string.
|
|
// On Darwin and Linux, each entry is a NULL-terminated string.
|
|
func stringsFromByteSlice(buf []byte) (result []string) {
|
|
offset := 0
|
|
for index, b := range buf {
|
|
if b == 0 {
|
|
result = append(result, string(buf[offset:index]))
|
|
offset = index + 1
|
|
}
|
|
}
|
|
return
|
|
}
|