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@xxxxxx>
---
fs/nfsd/Kconfig | 13 +++++++++----
fs/nfsd/Makefile | 3 ++-
fs/nfsd/nfs4layouts.c | 4 ++++
fs/nfsd/pnfs.h | 2 ++
fs/xfs/Makefile | 2 +-
fs/xfs/xfs_export.c | 2 +-
fs/xfs/xfs_pnfs.h | 2 +-
7 files changed, 20 insertions(+), 8 deletions(-)
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index a0b77fc..eb70d91 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 9a6028e..679cdc6 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 ce2d010..4e4def7 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 d4c4453..ff50bfa 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,
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index f646391..d68b62a 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -121,4 +121,4 @@ xfs-$(CONFIG_XFS_RT) += xfs_rtalloc.o
xfs-$(CONFIG_XFS_POSIX_ACL) += xfs_acl.o
xfs-$(CONFIG_SYSCTL) += xfs_sysctl.o
xfs-$(CONFIG_COMPAT) += xfs_ioctl32.o
-xfs-$(CONFIG_NFSD_PNFS) += xfs_pnfs.o
+xfs-$(CONFIG_NFSD_BLOCKLAYOUT) += xfs_pnfs.o
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index 652cd3c..0492b82 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -246,7 +246,7 @@ const struct export_operations xfs_export_operations = {
.fh_to_parent = xfs_fs_fh_to_parent,
.get_parent = xfs_fs_get_parent,
.commit_metadata = xfs_fs_nfs_commit_metadata,
-#ifdef CONFIG_NFSD_PNFS
+#ifdef CONFIG_NFSD_BLOCKLAYOUT
.get_uuid = xfs_fs_get_uuid,
.map_blocks = xfs_fs_map_blocks,
.commit_blocks = xfs_fs_commit_blocks,
diff --git a/fs/xfs/xfs_pnfs.h b/fs/xfs/xfs_pnfs.h
index 8147ac1..d85529c 100644
--- a/fs/xfs/xfs_pnfs.h
+++ b/fs/xfs/xfs_pnfs.h
@@ -1,7 +1,7 @@
#ifndef _XFS_PNFS_H
#define _XFS_PNFS_H 1
-#ifdef CONFIG_NFSD_PNFS
+#ifdef CONFIG_NFSD_BLOCKLAYOUT
int xfs_fs_get_uuid(struct super_block *sb, u8 *buf, u32 *len, u64 *offset);
int xfs_fs_map_blocks(struct inode *inode, loff_t offset, u64 length,
struct iomap *iomap, bool write, u32 *device_generation);
--
2.1.4
--
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