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| author |   Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-10-17 09:49:45 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2019-11-03 21:28:45 -0500 |
| commit | 52f98f1a2ddd2bb561f2c7e3b19a81d816a63118 (patch) | |
| tree | 0b79c0535d80b1e96739ee15fd4947ed4ff75cf0 | |
| parent | pNFS: nfs3_set_ds_client should set NFS_CS_NOPING (diff) | |
| download | linux-dev-52f98f1a2ddd2bb561f2c7e3b19a81d816a63118.tar.xz linux-dev-52f98f1a2ddd2bb561f2c7e3b19a81d816a63118.zip | |
NFS/pnfs: Separate NFSv3 DS and MDS traffic
If a NFSv3 server is being used as both a DS and as a regular NFSv3 server,
we may want to keep the IO traffic on a separate TCP connection, since
it will typically have very different timeout characteristics.
This patch therefore sets up a flag to separate the two modes of operation
for the nfs_client.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
| -rw-r--r-- | fs/nfs/client.c | 6 | ||||
| -rw-r--r-- | fs/nfs/nfs3client.c | 1 | ||||
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 1 |
3 files changed, 8 insertions, 0 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c index fa7d92328c72..bd6575ee3b8e 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -312,6 +312,12 @@ again: /* Match nfsv4 minorversion */ if (clp->cl_minorversion != data->minorversion) continue; + + /* Match request for a dedicated DS */ + if (test_bit(NFS_CS_DS, &data->init_flags) != + test_bit(NFS_CS_DS, &clp->cl_flags)) + continue; + /* Match the full socket address */ if (!rpc_cmp_addr_port(sap, clap)) /* Match all xprt_switch full socket addresses */ diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c index 793fa4273edb..223904bc40a7 100644 --- a/fs/nfs/nfs3client.c +++ b/fs/nfs/nfs3client.c @@ -109,6 +109,7 @@ struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv, __set_bit(NFS_CS_NORESVPORT, &cl_init.init_flags); __set_bit(NFS_CS_NOPING, &cl_init.init_flags); + __set_bit(NFS_CS_DS, &cl_init.init_flags); /* Use the MDS nfs_client cl_ipaddr. */ nfs_init_timeout_values(&ds_timeout, ds_proto, ds_timeo, ds_retrans); diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index a50dd432475b..69e80cef5a81 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -46,6 +46,7 @@ struct nfs_client { #define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ #define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */ #define NFS_CS_NOPING 6 /* - don't ping on connect */ +#define NFS_CS_DS 7 /* - Server is a DS */ struct sockaddr_storage cl_addr; /* server identifier */ size_t cl_addrlen; char * cl_hostname; /* hostname of server */ |