On 04/02/2015 04:43 AM, Christoph Hellwig wrote:
> This goes along with the patch just sent to Bruce to make pnfs
> support conditional.
>
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Committed..
steved.
> ---
> 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
>
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