Method inodeUnlinkVerInList

metanode/inode.go:1796–1830

(mpId uint64, ino *Inode, mpVer uint64, mpVerlist *proto.VolVersionInfoList)

}

func (inode *Inode) inodeUnlinkVerInList(mpId uint64, ino *Inode, mpVer uint64, mpVerlist *proto.VolVersionInfoList) (ext2Del []proto.ExtentKey, doMore bool, status uint8) {
	var dIno *Inode
	status = proto.OpOk
	// special case, snapshot is the last one and be depended by upper version,update it's version to the right one
	// ascend search util to the curr unCommit version in the verList
	if ino.getVer() == inode.getVer() || (isInitSnapVer(ino.getVer()) && inode.getVer() == 0) {
		if len(mpVerlist.VerList) == 0 {
			status = proto.OpNotExistErr
			log.LogErrorf("action[unlinkVerInList] inode[%v] mpVerlist should be larger than 0, return not found", inode.Inode)
			return
		}

		// just move to upper layer,the request snapshot be dropped
		nVerSeq, found := inode.getLastestVer(inode.getVer(), mpVerlist)
		if !found {
			status = proto.OpNotExistErr
			return
		}
		log.LogDebugf("action[unlinkVerInList] inode[%v] update current verseq [%v] to %v", inode.Inode, inode.getVer(), nVerSeq)
		inode.setVer(nVerSeq)
		return
	} else {
		// don't unlink if no version satisfied
		if ext2Del, dIno = inode.getAndDelVerInList(mpId, ino.getVer(), mpVer, mpVerlist); dIno == nil {
			status = proto.OpNotExistErr
			log.LogDebugf("action[unlinkVerInList] ino[%v]", ino)
			return
		}
	}

	dIno.DecNLink()
	log.LogDebugf("action[unlinkVerInList] inode[%v] snapshot layer be unlinked", ino.Inode)
	doMore = true
	return
}

func (inode *Inode) unlinkVerInList(mpId uint64, ino *Inode, mpVer uint64, mpVerlist *proto.VolVersionInfoList) (ext2Del []proto.ExtentKey, doMore bool, status uint8) {
	log.LogDebugf("action[unlinkVerInList] mpId [%v] ino[%v] try search seq [%v] isdir %v", mpId, ino, ino.getVer(), proto.IsDir(inode.Type))