mirror of
https://github.com/ceph/go-ceph
synced 2024-12-24 23:22:33 +00:00
c433abf787
The ceph api function supports passing a string to identify the client doing the mount. Expose that aspect of the api with a new function CreateMountWithId. Signed-off-by: John Mulligan <jmulligan@redhat.com>
163 lines
3.9 KiB
Go
163 lines
3.9 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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"fmt"
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"unsafe"
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"github.com/ceph/go-ceph/errutil"
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"github.com/ceph/go-ceph/rados"
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)
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type CephFSError int
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func (e CephFSError) Error() string {
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errno, s := errutil.FormatErrno(int(e))
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if s == "" {
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return fmt.Sprintf("cephfs: ret=%d", errno)
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}
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return fmt.Sprintf("cephfs: ret=%d, %s", errno, s)
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}
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func getError(e C.int) error {
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if e == 0 {
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return nil
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}
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return CephFSError(e)
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}
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// MountInfo exports ceph's ceph_mount_info from libcephfs.cc
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type MountInfo struct {
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mount *C.struct_ceph_mount_info
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}
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func createMount(id *C.char) (*MountInfo, error) {
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mount := &MountInfo{}
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ret := C.ceph_create(&mount.mount, id)
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if ret != 0 {
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return nil, getError(ret)
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}
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return mount, nil
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}
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// CreateMount creates a mount handle for interacting with Ceph.
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func CreateMount() (*MountInfo, error) {
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return createMount(nil)
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}
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// CreateMountWithId creates a mount handle for interacting with Ceph.
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// The caller can specify a unique id that will identify this client.
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func CreateMountWithId(id string) (*MountInfo, error) {
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cid := C.CString(id)
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defer C.free(unsafe.Pointer(cid))
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return createMount(cid)
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}
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// CreateFromRados creates a mount handle using an existing rados cluster
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// connection.
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//
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// Implements:
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// int ceph_create_from_rados(struct ceph_mount_info **cmount, rados_t cluster);
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func CreateFromRados(conn *rados.Conn) (*MountInfo, error) {
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mount := &MountInfo{}
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ret := C.ceph_create_from_rados(&mount.mount, C.rados_t(conn.Cluster()))
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if ret != 0 {
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return nil, getError(ret)
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}
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return mount, nil
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}
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// ReadDefaultConfigFile loads the ceph configuration from the specified config file.
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func (mount *MountInfo) ReadDefaultConfigFile() error {
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ret := C.ceph_conf_read_file(mount.mount, nil)
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return getError(ret)
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}
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// Mount mounts the mount handle.
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func (mount *MountInfo) Mount() error {
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ret := C.ceph_mount(mount.mount, nil)
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return getError(ret)
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}
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// Unmount unmounts the mount handle.
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func (mount *MountInfo) Unmount() error {
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ret := C.ceph_unmount(mount.mount)
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return getError(ret)
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}
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// Release destroys the mount handle.
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func (mount *MountInfo) Release() error {
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ret := C.ceph_release(mount.mount)
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return getError(ret)
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}
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// SyncFs synchronizes all filesystem data to persistent media.
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func (mount *MountInfo) SyncFs() error {
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ret := C.ceph_sync_fs(mount.mount)
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return getError(ret)
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}
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// CurrentDir gets the current working directory.
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func (mount *MountInfo) CurrentDir() string {
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cDir := C.ceph_getcwd(mount.mount)
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return C.GoString(cDir)
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}
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// ChangeDir changes the current working directory.
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func (mount *MountInfo) ChangeDir(path string) error {
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cPath := C.CString(path)
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defer C.free(unsafe.Pointer(cPath))
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ret := C.ceph_chdir(mount.mount, cPath)
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return getError(ret)
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}
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// MakeDir creates a directory.
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func (mount *MountInfo) MakeDir(path string, mode uint32) error {
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cPath := C.CString(path)
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defer C.free(unsafe.Pointer(cPath))
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ret := C.ceph_mkdir(mount.mount, cPath, C.mode_t(mode))
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return getError(ret)
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}
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// RemoveDir removes a directory.
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func (mount *MountInfo) RemoveDir(path string) error {
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cPath := C.CString(path)
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defer C.free(unsafe.Pointer(cPath))
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ret := C.ceph_rmdir(mount.mount, cPath)
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return getError(ret)
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}
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// Chmod changes the mode bits (permissions) of a file/directory.
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func (mount *MountInfo) Chmod(path string, mode uint32) error {
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cPath := C.CString(path)
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defer C.free(unsafe.Pointer(cPath))
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ret := C.ceph_chmod(mount.mount, cPath, C.mode_t(mode))
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return getError(ret)
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}
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// Chown changes the ownership of a file/directory.
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func (mount *MountInfo) Chown(path string, user uint32, group uint32) error {
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cPath := C.CString(path)
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defer C.free(unsafe.Pointer(cPath))
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ret := C.ceph_chown(mount.mount, cPath, C.int(user), C.int(group))
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return getError(ret)
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}
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// IsMounted checks mount status.
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func (mount *MountInfo) IsMounted() bool {
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ret := C.ceph_is_mounted(mount.mount)
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return ret == 1
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}
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