mirror of
https://github.com/ceph/go-ceph
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e2a78eec02
The *_command functions in librados and libcephfs document the use of specific free functions for data allocated. These functions are currently just wrappers around C's free() function. However, to be more strictly compliant this change adds a free-function callback to the CommandOutput type and the specific free functions are now used outside the unit tests. Signed-off-by: John Mulligan <jmulligan@redhat.com>
64 lines
1.8 KiB
Go
64 lines
1.8 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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// 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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