[PATCH 1/1] nfsd4_copy: Adds the ability to do inter server to server on an export

Steve Dickson
2021-10-28T14:49:07Z

This adds the 's2sc' export option allowing inter server
to server copies on the destination server.

Signed-off-by: Steve Dickson <steved@redhat.com>
---
fs/nfsd/nfs4proc.c | 3 ++-
include/uapi/linux/nfsd/export.h | 1 +
2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 486c5dba4b65..df3ca5f7f86f 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1654,9 +1654,10 @@ nfsd4_copy(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
struct nfsd4_copy *copy = &u->copy;
__be32 status;
struct nfsd4_copy *async_copy = NULL;
+ int s2sc = (cstate->current_fh.fh_export->ex_flags & NFSEXP_S2SC);

if (!copy->cp_intra) { /* Inter server SSC */
- if (!inter_copy_offload_enable || copy->cp_synchronous) {
+ if (s2sc == 0 && (!inter_copy_offload_enable || copy->cp_synchronous)) {
status = nfserr_notsupp;
goto out;
}
diff --git a/include/uapi/linux/nfsd/export.h b/include/uapi/linux/nfsd/export.h
index 2124ba904779..53ba8d989689 100644
--- a/include/uapi/linux/nfsd/export.h
+++ b/include/uapi/linux/nfsd/export.h
@@ -53,6 +53,7 @@
*/
#define NFSEXP_V4ROOT 0x10000
#define NFSEXP_PNFS 0x20000
+#define NFSEXP_S2SC 0x40000

/* All flags that we claim to support. (Note we don't support NOACL.) */
#define NFSEXP_ALLFLAGS 0x3FEFF
--
2.31.1