git: 80e5955b085a - main - nfscl: Fix NFSv4.1/4.2 pnfs mounts using nconnect
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Date: Fri, 05 Nov 2021 00:09:53 UTC
The branch main has been updated by rmacklem: URL: https://cgit.FreeBSD.org/src/commit/?id=80e5955b085af20e65ef84066a164936413748e3 commit 80e5955b085af20e65ef84066a164936413748e3 Author: Rick Macklem <rmacklem@FreeBSD.org> AuthorDate: 2021-11-05 00:06:34 +0000 Commit: Rick Macklem <rmacklem@FreeBSD.org> CommitDate: 2021-11-05 00:06:34 +0000 nfscl: Fix NFSv4.1/4.2 pnfs mounts using nconnect When a mount with the "pnfs" and "nconnect" options specified does an I/O operation, it erroneously uses a TCP connection to the MDS when it is meant to be a DS operation and, as such, needs to use a TCP connection to the DS. This patch fixes this. When the "pnfs" and "nconnect" options are specified for a NFSv4.1/4.2 mount, there probably should be N connections established to each DS for I/O RPCs. This is a fair amount of work and may be done in a future commit. This problem was found during a recent IETF NFSv4 working group testing event. MFC after: 2 weeks --- sys/fs/nfs/nfs_commonkrpc.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/sys/fs/nfs/nfs_commonkrpc.c b/sys/fs/nfs/nfs_commonkrpc.c index 358d77fe5b30..c1a5fab2a358 100644 --- a/sys/fs/nfs/nfs_commonkrpc.c +++ b/sys/fs/nfs/nfs_commonkrpc.c @@ -639,8 +639,17 @@ newnfs_request(struct nfsrv_descript *nd, struct nfsmount *nmp, if (nrp->nr_client == NULL) newnfs_connect(nmp, nrp, cred, td, 0, false, &nrp->nr_client); + /* + * If the "nconnect" mount option was specified and this RPC is + * one that can have a large RPC message and is being done through + * the NFS/MDS server, use an additional connection. (When the RPC is + * being done through the server/MDS, nrp == &nmp->nm_sockreq.) + * The "nconnect" mount option normally has minimal effect when the + * "pnfs" mount option is specified, since only Readdir RPCs are + * normally done through the NFS/MDS server. + */ nextconn_set = false; - if (nmp != NULL && nmp->nm_aconnect > 0 && + if (nmp != NULL && nmp->nm_aconnect > 0 && nrp == &nmp->nm_sockreq && (nd->nd_procnum == NFSPROC_READ || nd->nd_procnum == NFSPROC_READDIR || nd->nd_procnum == NFSPROC_READDIRPLUS ||