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authorChristoph Hellwig <hch@lst.de>2016-03-04 20:46:16 +0100
committerJ. Bruce Fields <bfields@redhat.com>2016-03-18 11:40:57 -0400
commit81c39329010d6131c0909ccb91ffeaffc2e99010 (patch)
tree258dd96de67730499a91cfceb8c5764dcb504c6b /fs/nfsd
parentd9186c03976506cde2c2b1219028bed449c948ed (diff)
downloadlinux-81c39329010d6131c0909ccb91ffeaffc2e99010.tar.bz2
nfsd: add a new config option for the block layout driver
Split the config symbols into a generic pNFS one, which is invisible and gets selected by the layout drivers, and one for the block layout driver. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/Kconfig13
-rw-r--r--fs/nfsd/Makefile3
-rw-r--r--fs/nfsd/nfs4layouts.c4
-rw-r--r--fs/nfsd/pnfs.h2
4 files changed, 17 insertions, 5 deletions
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index a0b77fc1bd39..eb70d91b255b 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -84,12 +84,17 @@ config NFSD_V4
If unsure, say N.
config NFSD_PNFS
- bool "NFSv4.1 server support for Parallel NFS (pNFS)"
+ bool
+
+config NFSD_BLOCKLAYOUT
+ bool "NFSv4.1 server support for pNFS block layouts"
depends on NFSD_V4
+ select NFSD_PNFS
help
- This option enables support for the parallel NFS features of the
- minor version 1 of the NFSv4 protocol (RFC5661) in the kernel's NFS
- server.
+ This option enables support for the exporting pNFS block layouts
+ in the kernel's NFS server. The pNFS block layout enables NFS
+ clients to directly perform I/O to block devices accesible to both
+ the server and the clients. See RFC 5663 for more details.
If unsure, say N.
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index 9a6028e120c6..679cdc6efee8 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -17,4 +17,5 @@ nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o
nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
nfsd-$(CONFIG_NFSD_V4) += nfs4proc.o nfs4xdr.o nfs4state.o nfs4idmap.o \
nfs4acl.o nfs4callback.o nfs4recover.o
-nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o blocklayout.o blocklayoutxdr.o
+nfsd-$(CONFIG_NFSD_PNFS) += nfs4layouts.o
+nfsd-$(CONFIG_NFSD_BLOCKLAYOUT) += blocklayout.o blocklayoutxdr.o
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index ce2d010d3b17..4e4def77ebc7 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -26,7 +26,9 @@ static const struct nfsd4_callback_ops nfsd4_cb_layout_ops;
static const struct lock_manager_operations nfsd4_layouts_lm_ops;
const struct nfsd4_layout_ops *nfsd4_layout_ops[LAYOUT_TYPE_MAX] = {
+#ifdef CONFIG_NFSD_BLOCKLAYOUT
[LAYOUT_BLOCK_VOLUME] = &bl_layout_ops,
+#endif
};
/* pNFS device ID to export fsid mapping */
@@ -121,10 +123,12 @@ void nfsd4_setup_layout_type(struct svc_export *exp)
if (!(exp->ex_flags & NFSEXP_PNFS))
return;
+#ifdef CONFIG_NFSD_BLOCKLAYOUT
if (sb->s_export_op->get_uuid &&
sb->s_export_op->map_blocks &&
sb->s_export_op->commit_blocks)
exp->ex_layout_type = LAYOUT_BLOCK_VOLUME;
+#endif
}
static void
diff --git a/fs/nfsd/pnfs.h b/fs/nfsd/pnfs.h
index d4c4453674c6..ff50bfa1f76f 100644
--- a/fs/nfsd/pnfs.h
+++ b/fs/nfsd/pnfs.h
@@ -35,7 +35,9 @@ struct nfsd4_layout_ops {
};
extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
+#ifdef CONFIG_NFSD_BLOCKLAYOUT
extern const struct nfsd4_layout_ops bl_layout_ops;
+#endif
__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
struct nfsd4_compound_state *cstate, stateid_t *stateid,