于 2013-7-24 21:11, Wenchao Xia 写道:
于 2013-7-24 17:44, Paolo Bonzini 写道:
Il 24/07/2013 07:38, Wenchao Xia ha scritto:
Because libvirt would use a local (Unix) socket to communicate with QEMU and pass the file descriptor, there is no need to authenticate the NBD connection. There is no need for ticketing, though if necessary we can make QEMU only accept connections from libvirtd's pid. libvirt and VDSM already do authentication and/or encryption.
How do I get the info about IP/port needed to access that snapshot? call virSnapshotGetInfo(or similar API) later?
See above. You don't, you use the libvirt channel.
Paolo
So I will got a libvirt API like virSnapshotRead(Domain *domain, SnapshotPtr *sn, uint64 sector_num, uint64 sector_len, char *buf)? then libvirt automatically access the snapshot and fill the buffer for user? A API let me access in some way would be my concern.
I found the API doc online: int virDomainBlockPeek (virDomainPtr dom, const char * disk, unsigned long long offset, size_t size, void * buffer, unsigned int flags) Guess the problem is extend it to work with snapshot. -- Best Regards Wenchao Xia