mirror of
https://github.com/ceph/ceph-csi.git
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4ccb299fd5
this commit updates the version of go-ceph imported to latest, so we can make use of github.com/ceph/go-ceph/cephfs Signed-off-by: Riya Singhal <rsinghal@redhat.com>
164 lines
3.7 KiB
Go
164 lines
3.7 KiB
Go
package cephfs
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/*
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#cgo LDFLAGS: -lcephfs
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#cgo CPPFLAGS: -D_FILE_OFFSET_BITS=64
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#define _GNU_SOURCE
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/xattr.h>
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#include <cephfs/libcephfs.h>
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*/
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import "C"
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import (
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"unsafe"
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"github.com/ceph/go-ceph/internal/cutil"
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"github.com/ceph/go-ceph/internal/retry"
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)
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// XattrFlags are used to control the behavior of set-xattr calls.
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type XattrFlags int
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const (
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// XattrDefault specifies that set-xattr calls use the default behavior of
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// creating or updating an xattr.
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XattrDefault = XattrFlags(0)
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// XattrCreate specifies that set-xattr calls only set new xattrs.
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XattrCreate = XattrFlags(C.XATTR_CREATE)
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// XattrReplace specifies that set-xattr calls only replace existing xattr
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// values.
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XattrReplace = XattrFlags(C.XATTR_REPLACE)
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)
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// SetXattr sets an extended attribute on the open file.
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//
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// NOTE: Attempting to set an xattr value with an empty value may cause the
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// xattr to be unset on some older versions of ceph.
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// Please refer to https://tracker.ceph.com/issues/46084
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//
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// Implements:
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//
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// int ceph_fsetxattr(struct ceph_mount_info *cmount, int fd, const char *name,
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// const void *value, size_t size, int flags);
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func (f *File) SetXattr(name string, value []byte, flags XattrFlags) error {
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if err := f.validate(); err != nil {
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return err
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}
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if name == "" {
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return errInvalid
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}
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var vptr unsafe.Pointer
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if len(value) > 0 {
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vptr = unsafe.Pointer(&value[0])
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}
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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ret := C.ceph_fsetxattr(
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f.mount.mount,
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f.fd,
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cName,
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vptr,
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C.size_t(len(value)),
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C.int(flags))
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return getError(ret)
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}
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// GetXattr gets an extended attribute from the open file.
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//
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// Implements:
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//
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// int ceph_fgetxattr(struct ceph_mount_info *cmount, int fd, const char *name,
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// void *value, size_t size);
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func (f *File) GetXattr(name string) ([]byte, error) {
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if err := f.validate(); err != nil {
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return nil, err
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}
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if name == "" {
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return nil, errInvalid
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}
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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var (
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ret C.int
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err error
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buf []byte
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)
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// range from 1k to 64KiB
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retry.WithSizes(1024, 1<<16, func(size int) retry.Hint {
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buf = make([]byte, size)
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ret = C.ceph_fgetxattr(
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f.mount.mount,
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f.fd,
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cName,
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unsafe.Pointer(&buf[0]),
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C.size_t(size))
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err = getErrorIfNegative(ret)
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return retry.DoubleSize.If(err == errRange)
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})
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if err != nil {
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return nil, err
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}
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return buf[:ret], nil
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}
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// ListXattr returns a slice containing strings for the name of each xattr set
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// on the file.
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//
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// Implements:
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//
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// int ceph_flistxattr(struct ceph_mount_info *cmount, int fd, char *list, size_t size);
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func (f *File) ListXattr() ([]string, error) {
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if err := f.validate(); err != nil {
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return nil, err
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}
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var (
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ret C.int
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err error
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buf []byte
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)
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// range from 1k to 64KiB
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retry.WithSizes(1024, 1<<16, func(size int) retry.Hint {
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buf = make([]byte, size)
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ret = C.ceph_flistxattr(
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f.mount.mount,
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f.fd,
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(*C.char)(unsafe.Pointer(&buf[0])),
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C.size_t(size))
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err = getErrorIfNegative(ret)
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return retry.DoubleSize.If(err == errRange)
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})
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if err != nil {
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return nil, err
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}
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names := cutil.SplitSparseBuffer(buf[:ret])
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return names, nil
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}
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// RemoveXattr removes the named xattr from the open file.
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//
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// Implements:
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//
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// int ceph_fremovexattr(struct ceph_mount_info *cmount, int fd, const char *name);
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func (f *File) RemoveXattr(name string) error {
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if err := f.validate(); err != nil {
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return err
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}
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if name == "" {
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return errInvalid
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}
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cName := C.CString(name)
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defer C.free(unsafe.Pointer(cName))
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ret := C.ceph_fremovexattr(
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f.mount.mount,
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f.fd,
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cName)
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return getError(ret)
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}
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