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    SubjectRe: [PATCH 00/12] make rpc_pipefs be mountable multiple times
    On Tue, Dec 21, 2010 at 06:45:21PM -0500, J. Bruce Fields wrote:
    > On Wed, Dec 22, 2010 at 01:32:15AM +0200, Kirill A. Shutemov wrote:
    > > On Mon, Dec 20, 2010 at 09:46:44AM -0500, J. Bruce Fields wrote:
    > > > By the way, was there ever a resolution to Trond's question?:
    > > >
    > > > http://marc.info/?l=linux-nfs&m=128655758712817&w=2
    > > >
    > > > "The keyring upcalls are currently initiated through the same
    > > > mechanism as module_request and therefore get started with the
    > > > init_nsproxy namespace. We'd really like them to run inside the
    > > > same container as the process. As part of the same problem,
    > > > there is the issue of what to do with the dns resolver and
    > > > Bryan's new keyring based idmapper code."
    > >
    > > I'm not sure that I understand the problem correctly.
    > >
    > > Currently, idmap uses dentry taken from client's cl_rpcclient->cl_path
    > > (see nfs_idmap_new()). cl_rpcclient (and cl_path) is initialized with
    > > rpcmount resolved against mount namespace of mount process (see
    > > nfs_create_rpc_client()).
    > > I assume it's correct.
    >
    > There's actually two separate sets of idmapper code; look at
    > fs/nfs/idmapper.c, the first part of the file (between #ifdef
    > CONFIG_NFS_USE_NEW_IDMAPPER and #else) is idmapping code that uses
    > request_key(). The code you're looking at (including nfs_idmap_new())
    > is later in the file, and deprecated.

    IIUC, we need to save nsproxy of mount process in struct nfs_client and
    pass it down to request_key(). I think it's outside of this patchset.

    --
    Kirill A. Shutemov


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