Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

include/linux/nfsd/export.h

@@ -0,0 +1,137 @@
+/*
+ * include/linux/nfsd/export.h
+ * 
+ * Public declarations for NFS exports. The definitions for the
+ * syscall interface are in nfsctl.h
+ *
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef NFSD_EXPORT_H
+#define NFSD_EXPORT_H
+
+#include <asm/types.h>
+#ifdef __KERNEL__
+# include <linux/types.h>
+# include <linux/in.h>
+#endif
+
+/*
+ * Important limits for the exports stuff.
+ */
+#define NFSCLNT_IDMAX		1024
+#define NFSCLNT_ADDRMAX		16
+#define NFSCLNT_KEYMAX		32
+
+/*
+ * Export flags.
+ */
+#define NFSEXP_READONLY		0x0001
+#define NFSEXP_INSECURE_PORT	0x0002
+#define NFSEXP_ROOTSQUASH	0x0004
+#define NFSEXP_ALLSQUASH	0x0008
+#define NFSEXP_ASYNC		0x0010
+#define NFSEXP_GATHERED_WRITES	0x0020
+/* 40 80 100 currently unused */
+#define NFSEXP_NOHIDE		0x0200
+#define NFSEXP_NOSUBTREECHECK	0x0400
+#define	NFSEXP_NOAUTHNLM	0x0800		/* Don't authenticate NLM requests - just trust */
+#define NFSEXP_MSNFS		0x1000	/* do silly things that MS clients expect */
+#define NFSEXP_FSID		0x2000
+#define	NFSEXP_CROSSMOUNT	0x4000
+#define	NFSEXP_NOACL		0x8000	/* reserved for possible ACL related use */
+#define NFSEXP_ALLFLAGS		0xFE3F
+
+
+#ifdef __KERNEL__
+
+struct svc_export {
+	struct cache_head	h;
+	struct auth_domain *	ex_client;
+	int			ex_flags;
+	struct vfsmount *	ex_mnt;
+	struct dentry *		ex_dentry;
+	uid_t			ex_anon_uid;
+	gid_t			ex_anon_gid;
+	int			ex_fsid;
+};
+
+/* an "export key" (expkey) maps a filehandlefragement to an
+ * svc_export for a given client.  There can be two per export, one
+ * for type 0 (dev/ino), one for type 1 (fsid)
+ */
+struct svc_expkey {
+	struct cache_head	h;
+
+	struct auth_domain *	ek_client;
+	int			ek_fsidtype;
+	u32			ek_fsid[3];
+
+	struct svc_export *	ek_export;
+};
+
+#define EX_SECURE(exp)		(!((exp)->ex_flags & NFSEXP_INSECURE_PORT))
+#define EX_ISSYNC(exp)		(!((exp)->ex_flags & NFSEXP_ASYNC))
+#define EX_RDONLY(exp)		((exp)->ex_flags & NFSEXP_READONLY)
+#define EX_NOHIDE(exp)		((exp)->ex_flags & NFSEXP_NOHIDE)
+#define EX_WGATHER(exp)		((exp)->ex_flags & NFSEXP_GATHERED_WRITES)
+
+
+/*
+ * Function declarations
+ */
+void			nfsd_export_init(void);
+void			nfsd_export_shutdown(void);
+void			nfsd_export_flush(void);
+void			exp_readlock(void);
+void			exp_readunlock(void);
+struct svc_expkey *	exp_find_key(struct auth_domain *clp, 
+				     int fsid_type, u32 *fsidv,
+				     struct cache_req *reqp);
+struct svc_export *	exp_get_by_name(struct auth_domain *clp,
+					struct vfsmount *mnt,
+					struct dentry *dentry,
+					struct cache_req *reqp);
+struct svc_export *	exp_parent(struct auth_domain *clp,
+				   struct vfsmount *mnt,
+				   struct dentry *dentry,
+				   struct cache_req *reqp);
+int			exp_rootfh(struct auth_domain *, 
+					char *path, struct knfsd_fh *, int maxsize);
+int			exp_pseudoroot(struct auth_domain *, struct svc_fh *fhp, struct cache_req *creq);
+int			nfserrno(int errno);
+
+extern void expkey_put(struct cache_head *item, struct cache_detail *cd);
+extern void svc_export_put(struct cache_head *item, struct cache_detail *cd);
+extern struct cache_detail svc_export_cache, svc_expkey_cache;
+
+static inline void exp_put(struct svc_export *exp)
+{
+	svc_export_put(&exp->h, &svc_export_cache);
+}
+
+static inline void exp_get(struct svc_export *exp)
+{
+	cache_get(&exp->h);
+}
+static inline struct svc_export *
+exp_find(struct auth_domain *clp, int fsid_type, u32 *fsidv,
+	 struct cache_req *reqp)
+{
+	struct svc_expkey *ek = exp_find_key(clp, fsid_type, fsidv, reqp);
+	if (ek && !IS_ERR(ek)) {
+		struct svc_export *exp = ek->ek_export;
+		int err;
+		exp_get(exp);
+		expkey_put(&ek->h, &svc_expkey_cache);
+		if ((err = cache_check(&svc_export_cache, &exp->h, reqp)))
+			exp = ERR_PTR(err);
+		return exp;
+	} else
+		return ERR_PTR(PTR_ERR(ek));
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* NFSD_EXPORT_H */
+