mirror of https://github.com/ceph/go-ceph
65 lines
1.7 KiB
Go
65 lines
1.7 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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#include <stdlib.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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)
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func cephBufferFree(p unsafe.Pointer) {
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C.ceph_buffer_free((*C.char)(p))
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}
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// MdsCommand sends commands to the specified MDS.
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func (mount *MountInfo) MdsCommand(mdsSpec string, args [][]byte) ([]byte, string, error) {
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return mount.mdsCommand(mdsSpec, args, nil)
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}
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// MdsCommandWithInputBuffer sends commands to the specified MDS, with an input
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// buffer.
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func (mount *MountInfo) MdsCommandWithInputBuffer(mdsSpec string, args [][]byte, inputBuffer []byte) ([]byte, string, error) {
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return mount.mdsCommand(mdsSpec, args, inputBuffer)
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}
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// mdsCommand supports sending formatted commands to MDS.
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//
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// Implements:
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//
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// int ceph_mds_command(struct ceph_mount_info *cmount,
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// const char *mds_spec,
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// const char **cmd,
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// size_t cmdlen,
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// const char *inbuf, size_t inbuflen,
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// char **outbuf, size_t *outbuflen,
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// char **outs, size_t *outslen);
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func (mount *MountInfo) mdsCommand(mdsSpec string, args [][]byte, inputBuffer []byte) (buffer []byte, info string, err error) {
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spec := C.CString(mdsSpec)
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defer C.free(unsafe.Pointer(spec))
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ci := cutil.NewCommandInput(args, inputBuffer)
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defer ci.Free()
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co := cutil.NewCommandOutput().SetFreeFunc(cephBufferFree)
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defer co.Free()
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ret := C.ceph_mds_command(
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mount.mount, // cephfs mount ref
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spec, // mds spec
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(**C.char)(ci.Cmd()),
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C.size_t(ci.CmdLen()),
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(*C.char)(ci.InBuf()),
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C.size_t(ci.InBufLen()),
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(**C.char)(co.OutBuf()),
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(*C.size_t)(co.OutBufLen()),
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(**C.char)(co.Outs()),
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(*C.size_t)(co.OutsLen()))
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buf, status := co.GoValues()
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return buf, status, getError(ret)
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}
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