Messages in this thread | | | Date | Fri, 10 Aug 2012 22:50:48 +0400 | From | Stanislav Kinsbursky <> | Subject | Re: [RFC PATCH 0/2] net: connect to UNIX sockets from specified root |
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10.08.2012 22:15, H. Peter Anvin пишет: > On 08/10/2012 05:57 AM, Stanislav Kinsbursky wrote: >> Today, there is a problem in connecting of local SUNRPC thansports. These >> transports uses UNIX sockets and connection itself is done by rpciod >> workqueue. >> But UNIX sockets lookup is done in context of process file system root. I.e. >> all local thunsports are connecting in rpciod context. >> This works nice until we will try to mount NFS from process with other root - >> for example in container. This container can have it's own (nested) root and >> rcpbind process, listening on it's own unix sockets. But NFS mount attempt in >> this container will register new service (Lockd for example) in global rpcbind >> - not containers's one. >> >> This patch set introduces kernel connect helper for UNIX stream sockets and >> modifies unix_find_other() to be able to search from specified root. >> It also replaces generic socket connect call for local transports by new >> helper in SUNRPC layer. >> >> The following series implements... > On that whole subject... > > Do we need a Unix domain socket equivalent to openat()?
It looks like sys_connectat () and sys_bindat () could be an organic part on openat () and friends family. But currently I don't have any usage example for them in hands. And the main problem here, that this syscalls can be used only for unix sockets.
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