NFS: Allow setting rsize / wsize to a multiple of PAGE_SIZE

Previously, we required this to value to be a power of 2 for UDP related
reasons. This patch keeps the power of 2 rule for UDP but allows more
flexibility for TCP and RDMA.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index e828504..da8da5c 100644 (file)
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -708,9 +708,9 @@ static int nfs_init_server(struct nfs_server *server,
        }
 
        if (ctx->rsize)
-               server->rsize = nfs_block_size(ctx->rsize, NULL);
+               server->rsize = nfs_io_size(ctx->rsize, clp->cl_proto);
        if (ctx->wsize)
-               server->wsize = nfs_block_size(ctx->wsize, NULL);
+               server->wsize = nfs_io_size(ctx->wsize, clp->cl_proto);
 
        server->acregmin = ctx->acregmin * HZ;
        server->acregmax = ctx->acregmax * HZ;
@@ -755,18 +755,19 @@ error:
 static void nfs_server_set_fsinfo(struct nfs_server *server,
                                  struct nfs_fsinfo *fsinfo)
 {
+       struct nfs_client *clp = server->nfs_client;
        unsigned long max_rpc_payload, raw_max_rpc_payload;
 
        /* Work out a lot of parameters */
        if (server->rsize == 0)
-               server->rsize = nfs_block_size(fsinfo->rtpref, NULL);
+               server->rsize = nfs_io_size(fsinfo->rtpref, clp->cl_proto);
        if (server->wsize == 0)
-               server->wsize = nfs_block_size(fsinfo->wtpref, NULL);
+               server->wsize = nfs_io_size(fsinfo->wtpref, clp->cl_proto);
 
        if (fsinfo->rtmax >= 512 && server->rsize > fsinfo->rtmax)
-               server->rsize = nfs_block_size(fsinfo->rtmax, NULL);
+               server->rsize = nfs_io_size(fsinfo->rtmax, clp->cl_proto);
        if (fsinfo->wtmax >= 512 && server->wsize > fsinfo->wtmax)
-               server->wsize = nfs_block_size(fsinfo->wtmax, NULL);
+               server->wsize = nfs_io_size(fsinfo->wtmax, clp->cl_proto);
 
        raw_max_rpc_payload = rpc_max_payload(server->client);
        max_rpc_payload = nfs_block_size(raw_max_rpc_payload, NULL);

diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index bfa7202..e028f5a 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -113,8 +113,10 @@ nfs4_ff_alloc_deviceid_node(struct nfs_server *server, struct pnfs_device *pdev,
                        goto out_err_drain_dsaddrs;
                ds_versions[i].version = be32_to_cpup(p++);
                ds_versions[i].minor_version = be32_to_cpup(p++);
-               ds_versions[i].rsize = nfs_block_size(be32_to_cpup(p++), NULL);
-               ds_versions[i].wsize = nfs_block_size(be32_to_cpup(p++), NULL);
+               ds_versions[i].rsize = nfs_io_size(be32_to_cpup(p++),
+                                                  server->nfs_client->cl_proto);
+               ds_versions[i].wsize = nfs_io_size(be32_to_cpup(p++),
+                                                  server->nfs_client->cl_proto);
                ds_versions[i].tightly_coupled = be32_to_cpup(p);
 
                if (ds_versions[i].rsize > NFS_MAX_FILE_IO_SIZE)

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index 8f8cd6e..af6d261 100644 (file)
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -705,6 +705,24 @@ unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
 }
 
 /*
+ * Compute and set NFS server rsize / wsize
+ */
+static inline
+unsigned long nfs_io_size(unsigned long iosize, enum xprt_transports proto)
+{
+       if (iosize < NFS_MIN_FILE_IO_SIZE)
+               iosize = NFS_DEF_FILE_IO_SIZE;
+       else if (iosize >= NFS_MAX_FILE_IO_SIZE)
+               iosize = NFS_MAX_FILE_IO_SIZE;
+       else
+               iosize = iosize & PAGE_MASK;
+
+       if (proto == XPRT_TRANSPORT_UDP)
+               return nfs_block_bits(iosize, NULL);
+       return iosize;
+}
+
+/*
  * Determine the maximum file size for a superblock
  */
 static inline

diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 47a6cf8..3c5678a 100644 (file)
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -1161,9 +1161,9 @@ static int nfs4_init_server(struct nfs_server *server, struct fs_context *fc)
                return error;
 
        if (ctx->rsize)
-               server->rsize = nfs_block_size(ctx->rsize, NULL);
+               server->rsize = nfs_io_size(ctx->rsize, server->nfs_client->cl_proto);
        if (ctx->wsize)
-               server->wsize = nfs_block_size(ctx->wsize, NULL);
+               server->wsize = nfs_io_size(ctx->wsize, server->nfs_client->cl_proto);
 
        server->acregmin = ctx->acregmin * HZ;
        server->acregmax = ctx->acregmax * HZ;