1 files changed, 81 insertions, 0 deletions

diff --git a/fs/nfsd/pnfs.h b/fs/nfsd/pnfs.h
new file mode 100644
index 000000000000..fedb4d620a81
--- /dev/null
+++ b/fs/nfsd/pnfs.h
@@ -0,0 +1,81 @@
+#ifndef _FS_NFSD_PNFS_H
+#define _FS_NFSD_PNFS_H 1
+
+#include <linux/exportfs.h>
+#include <linux/nfsd/export.h>
+
+#include "state.h"
+#include "xdr4.h"
+
+struct xdr_stream;
+
+struct nfsd4_deviceid_map {
+        struct list_head        hash;
+        u64                     idx;
+        int                     fsid_type;
+        u32                     fsid[];
+};
+
+struct nfsd4_layout_ops {
+        u32             notify_types;
+
+        __be32 (*proc_getdeviceinfo)(struct super_block *sb,
+                        struct nfsd4_getdeviceinfo *gdevp);
+        __be32 (*encode_getdeviceinfo)(struct xdr_stream *xdr,
+                        struct nfsd4_getdeviceinfo *gdevp);
+
+        __be32 (*proc_layoutget)(struct inode *, const struct svc_fh *fhp,
+                        struct nfsd4_layoutget *lgp);
+        __be32 (*encode_layoutget)(struct xdr_stream *,
+                        struct nfsd4_layoutget *lgp);
+
+        __be32 (*proc_layoutcommit)(struct inode *inode,
+                        struct nfsd4_layoutcommit *lcp);
+};
+
+extern const struct nfsd4_layout_ops *nfsd4_layout_ops[];
+extern const struct nfsd4_layout_ops bl_layout_ops;
+
+__be32 nfsd4_preprocess_layout_stateid(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *cstate, stateid_t *stateid,
+                bool create, u32 layout_type, struct nfs4_layout_stateid **lsp);
+__be32 nfsd4_insert_layout(struct nfsd4_layoutget *lgp,
+                struct nfs4_layout_stateid *ls);
+__be32 nfsd4_return_file_layouts(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *cstate,
+                struct nfsd4_layoutreturn *lrp);
+__be32 nfsd4_return_client_layouts(struct svc_rqst *rqstp,
+                struct nfsd4_compound_state *cstate,
+                struct nfsd4_layoutreturn *lrp);
+int nfsd4_set_deviceid(struct nfsd4_deviceid *id, const struct svc_fh *fhp,
+                u32 device_generation);
+struct nfsd4_deviceid_map *nfsd4_find_devid_map(int idx);
+
+#ifdef CONFIG_NFSD_PNFS
+void nfsd4_setup_layout_type(struct svc_export *exp);
+void nfsd4_return_all_client_layouts(struct nfs4_client *);
+void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
+                struct nfs4_file *fp);
+int nfsd4_init_pnfs(void);
+void nfsd4_exit_pnfs(void);
+#else
+static inline void nfsd4_setup_layout_type(struct svc_export *exp)
+{
+}
+
+static inline void nfsd4_return_all_client_layouts(struct nfs4_client *clp)
+{
+}
+static inline void nfsd4_return_all_file_layouts(struct nfs4_client *clp,
+                struct nfs4_file *fp)
+{
+}
+static inline void nfsd4_exit_pnfs(void)
+{
+}
+static inline int nfsd4_init_pnfs(void)
+{
+        return 0;
+}
+#endif /* CONFIG_NFSD_PNFS */
+#endif /* _FS_NFSD_PNFS_H */