This goes along with the patch just sent to Bruce to make pnfs
support conditional.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
support/include/nfs/export.h | 1 +
support/nfs/exports.c | 5 +++++
utils/exportfs/exportfs.c | 2 ++
utils/exportfs/exports.man | 9 +++++++++
4 files changed, 17 insertions(+)
diff --git a/support/include/nfs/export.h b/support/include/nfs/export.h
index 2f59e6a..1194255 100644
--- a/support/include/nfs/export.h
+++ b/support/include/nfs/export.h
@@ -26,6 +26,7 @@
#define NFSEXP_CROSSMOUNT 0x4000
#define NFSEXP_NOACL 0x8000 /* reserved for possible ACL related use */
#define NFSEXP_V4ROOT 0x10000
+#define NFSEXP_PNFS 0x20000
/*
* All flags supported by the kernel before addition of the
* export_features interface:
diff --git a/support/nfs/exports.c b/support/nfs/exports.c
index 4b17d3c..9b325b9 100644
--- a/support/nfs/exports.c
+++ b/support/nfs/exports.c
@@ -275,6 +275,7 @@ putexportent(struct exportent *ep)
"no_" : "");
if (ep->e_flags & NFSEXP_NOREADDIRPLUS)
fprintf(fp, "nordirplus,");
+ fprintf(fp, "%spnfs", (ep->e_flags & NFSEXP_PNFS)? "" : "no_");
if (ep->e_flags & NFSEXP_FSID) {
fprintf(fp, "fsid=%d,", ep->e_fsid);
}
@@ -581,6 +582,10 @@ parseopts(char *cp, struct exportent *ep, int warn, int *had_subtree_opt_ptr)
clearflags(NFSEXP_NOACL, active, ep);
else if (strcmp(opt, "no_acl") == 0)
setflags(NFSEXP_NOACL, active, ep);
+ else if (!strcmp(opt, "pnfs"))
+ setflags(NFSEXP_PNFS, active, ep);
+ else if (!strcmp(opt, "no_pnfs"))
+ clearflags(NFSEXP_PNFS, active, ep);
else if (strncmp(opt, "anonuid=", 8) == 0) {
char *oe;
ep->e_anonuid = strtol(opt+8, &oe, 10);
diff --git a/utils/exportfs/exportfs.c b/utils/exportfs/exportfs.c
index 48eac00..8758231 100644
--- a/utils/exportfs/exportfs.c
+++ b/utils/exportfs/exportfs.c
@@ -821,6 +821,8 @@ dump(int verbose, int export_format)
c = dumpopt(c, "nordirplus");
if (ep->e_flags & NFSEXP_NOACL)
c = dumpopt(c, "no_acl");
+ if (ep->e_flags & NFSEXP_PNFS)
+ c = dumpopt(c, "pnfs");
if (ep->e_flags & NFSEXP_FSID)
c = dumpopt(c, "fsid=%d", ep->e_fsid);
if (ep->e_uuid)
diff --git a/utils/exportfs/exports.man b/utils/exportfs/exports.man
index 88d9fbe..9309246 100644
--- a/utils/exportfs/exports.man
+++ b/utils/exportfs/exports.man
@@ -408,6 +408,15 @@ If the client asks for alternative locations for the export point, it
will be given this list of alternatives. (Note that actual replication
of the filesystem must be handled elsewhere.)
+.TP
+.IR pnfs
+This option allows enables the use of pNFS extension if protocol level
+is NFSv4.1 or higher, and the filesystem supports pNFS exports. With
+pNFS clients can bypass the server and perform I/O directly to storage
+devices. The default can be explicitly requested with the
+.I no_pnfs
+option.
+
.SS User ID Mapping
.PP
.B nfsd
--
1.9.1
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