mirror of
https://github.com/ceph/go-ceph
synced 2024-12-25 07:32:27 +00:00
78 lines
2.0 KiB
Go
78 lines
2.0 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 <cephfs/libcephfs.h>
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*/
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import "C"
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import (
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"runtime"
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"unsafe"
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"github.com/ceph/go-ceph/internal/log"
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)
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// UserPerm types may be used to get or change the credentials used by the
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// connection or some operations.
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type UserPerm struct {
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userPerm *C.UserPerm
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// cache create-time params
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managed bool // if set, the userPerm was created by go-ceph
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uid C.uid_t
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gid C.gid_t
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gidList []C.gid_t
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}
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// NewUserPerm creates a UserPerm pointer and the underlying ceph resources.
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//
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// Implements:
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// UserPerm *ceph_userperm_new(uid_t uid, gid_t gid, int ngids, gid_t *gidlist);
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func NewUserPerm(uid, gid int, gidlist []int) *UserPerm {
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// the C code does not copy the content of the gid list so we keep the
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// inputs stashed in the go type. For completeness we stash everything.
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p := &UserPerm{
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managed: true,
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uid: C.uid_t(uid),
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gid: C.gid_t(gid),
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gidList: make([]C.gid_t, len(gidlist)),
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}
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var cgids *C.gid_t
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if len(p.gidList) > 0 {
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for i, gid := range gidlist {
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p.gidList[i] = C.gid_t(gid)
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}
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cgids = (*C.gid_t)(unsafe.Pointer(&p.gidList[0]))
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}
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p.userPerm = C.ceph_userperm_new(
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p.uid, p.gid, C.int(len(p.gidList)), cgids)
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// if the go object is unreachable, we would like to free the c-memory
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// since this has no other resources than memory associated with it.
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// This is only valid for UserPerm objects created by new, and thus have
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// the managed var set.
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runtime.SetFinalizer(p, destroyUserPerm)
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return p
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}
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// Destroy will explicitly free ceph resources associated with the UserPerm.
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//
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// Implements:
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// void ceph_userperm_destroy(UserPerm *perm);
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func (p *UserPerm) Destroy() {
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if p.userPerm == nil || !p.managed {
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return
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}
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C.ceph_userperm_destroy(p.userPerm)
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p.userPerm = nil
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p.gidList = nil
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}
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func destroyUserPerm(p *UserPerm) {
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if p.userPerm != nil && p.managed {
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log.Warnf("unreachable UserPerm object has not been destroyed. Cleaning up.")
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}
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p.Destroy()
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}
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