diff options
| author | Weston Andros Adamson <dros@primarydata.com> | 2024-09-05 15:09:53 -0400 |
|---|---|---|
| committer | Anna Schumaker <anna.schumaker@oracle.com> | 2024-09-23 15:03:30 -0400 |
| commit | 70ba381e1a431245c137ed597ec6a05991c79bd9 (patch) | |
| tree | 572d704c7337f1084d797eed10faef394b7ba960 /fs/nfs/pagelist.c | |
| parent | df24c483e28f7f9a421afde15d0497e61bc2d3ea (diff) | |
nfs: add LOCALIO support
Add client support for bypassing NFS for localhost reads, writes, and
commits. This is only useful when the client and the server are
running on the same host.
nfs_local_probe() is stubbed out, later commits will enable client and
server handshake via a Linux-only LOCALIO auxiliary RPC protocol.
This has dynamic binding with the nfsd module (via nfs_localio module
which is part of nfs_common). LOCALIO will only work if nfsd is
already loaded.
The "localio_enabled" nfs kernel module parameter can be used to
disable and enable the ability to use LOCALIO support.
CONFIG_NFS_LOCALIO enables NFS client support for LOCALIO.
Lastly, LOCALIO uses an nfsd_file to initiate all IO. To make proper
use of nfsd_file (and nfsd's filecache) its lifetime (duration before
nfsd_file_put is called) must extend until after commit, read and
write operations. So rather than immediately drop the nfsd_file
reference in nfs_local_open_fh(), that doesn't happen until
nfs_local_pgio_release() for read/write and not until
nfs_local_release_commit_data() for commit. The same applies to the
reference held on nfsd's nn->nfsd_serv. Both objects' lifetimes and
associated references are managed through calls to
nfs_to->nfsd_file_put_local().
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Co-developed-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Signed-off-by: NeilBrown <neilb@suse.de> # nfs_open_local_fh
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Anna Schumaker <anna.schumaker@oracle.com>
Diffstat (limited to 'fs/nfs/pagelist.c')
| -rw-r--r-- | fs/nfs/pagelist.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c index 50f3d6c9ac2a..97d5524c379a 100644 --- a/fs/nfs/pagelist.c +++ b/fs/nfs/pagelist.c @@ -762,6 +762,10 @@ int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr, hdr->args.count, (unsigned long long)hdr->args.offset); + if (localio) + return nfs_local_doio(NFS_SERVER(hdr->inode)->nfs_client, + localio, hdr, call_ops); + task = rpc_run_task(&task_setup_data); if (IS_ERR(task)) return PTR_ERR(task); |