Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nfsd / export.h

diff --git a/kernel/fs/nfsd/export.h b/kernel/fs/nfsd/export.h
new file mode 100644 (file)
index 0000000..1f52bfc
--- /dev/null
+++ b/kernel/fs/nfsd/export.h
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+#ifndef NFSD_EXPORT_H
+#define NFSD_EXPORT_H
+
+#include <linux/sunrpc/cache.h>
+#include <uapi/linux/nfsd/export.h>
+
+struct knfsd_fh;
+struct svc_fh;
+struct svc_rqst;
+
+/*
+ * FS Locations
+ */
+
+#define MAX_FS_LOCATIONS       128
+
+struct nfsd4_fs_location {
+       char *hosts; /* colon separated list of hosts */
+       char *path;  /* slash separated list of path components */
+};
+
+struct nfsd4_fs_locations {
+       uint32_t locations_count;
+       struct nfsd4_fs_location *locations;
+/* If we're not actually serving this data ourselves (only providing a
+ * list of replicas that do serve it) then we set "migrated": */
+       int migrated;
+};
+
+/*
+ * We keep an array of pseudoflavors with the export, in order from most
+ * to least preferred.  For the foreseeable future, we don't expect more
+ * than the eight pseudoflavors null, unix, krb5, krb5i, krb5p, skpm3,
+ * spkm3i, and spkm3p (and using all 8 at once should be rare).
+ */
+#define MAX_SECINFO_LIST       8
+#define EX_UUID_LEN            16
+
+struct exp_flavor_info {
+       u32     pseudoflavor;
+       u32     flags;
+};
+
+struct svc_export {
+       struct cache_head       h;
+       struct auth_domain *    ex_client;
+       int                     ex_flags;
+       struct path             ex_path;
+       kuid_t                  ex_anon_uid;
+       kgid_t                  ex_anon_gid;
+       int                     ex_fsid;
+       unsigned char *         ex_uuid; /* 16 byte fsid */
+       struct nfsd4_fs_locations ex_fslocs;
+       uint32_t                ex_nflavors;
+       struct exp_flavor_info  ex_flavors[MAX_SECINFO_LIST];
+       enum pnfs_layouttype    ex_layout_type;
+       struct nfsd4_deviceid_map *ex_devid_map;
+       struct cache_detail     *cd;
+};
+
+/* an "export key" (expkey) maps a filehandlefragement to an
+ * svc_export for a given client.  There can be several per export,
+ * for the different fsid types.
+ */
+struct svc_expkey {
+       struct cache_head       h;
+
+       struct auth_domain *    ek_client;
+       int                     ek_fsidtype;
+       u32                     ek_fsid[6];
+
+       struct path             ek_path;
+};
+
+#define EX_ISSYNC(exp)         (!((exp)->ex_flags & NFSEXP_ASYNC))
+#define EX_NOHIDE(exp)         ((exp)->ex_flags & NFSEXP_NOHIDE)
+#define EX_WGATHER(exp)                ((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
+
+int nfsexp_flags(struct svc_rqst *rqstp, struct svc_export *exp);
+__be32 check_nfsd_access(struct svc_export *exp, struct svc_rqst *rqstp);
+
+/*
+ * Function declarations
+ */
+int                    nfsd_export_init(struct net *);
+void                   nfsd_export_shutdown(struct net *);
+void                   nfsd_export_flush(struct net *);
+struct svc_export *    rqst_exp_get_by_name(struct svc_rqst *,
+                                            struct path *);
+struct svc_export *    rqst_exp_parent(struct svc_rqst *,
+                                       struct path *);
+struct svc_export *    rqst_find_fsidzero_export(struct svc_rqst *);
+int                    exp_rootfh(struct net *, struct auth_domain *,
+                                       char *path, struct knfsd_fh *, int maxsize);
+__be32                 exp_pseudoroot(struct svc_rqst *, struct svc_fh *);
+__be32                 nfserrno(int errno);
+
+static inline void exp_put(struct svc_export *exp)
+{
+       cache_put(&exp->h, exp->cd);
+}
+
+static inline struct svc_export *exp_get(struct svc_export *exp)
+{
+       cache_get(&exp->h);
+       return exp;
+}
+struct svc_export * rqst_exp_find(struct svc_rqst *, int, u32 *);
+
+#endif /* NFSD_EXPORT_H */