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-rw-r--r--fs/nfsd/export.h132
1 files changed, 132 insertions, 0 deletions
diff --git a/fs/nfsd/export.h b/fs/nfsd/export.h
new file mode 100644
index 0000000000..2df8ae25aa
--- /dev/null
+++ b/fs/nfsd/export.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
+ */
+#ifndef NFSD_EXPORT_H
+#define NFSD_EXPORT_H
+
+#include <linux/sunrpc/cache.h>
+#include <linux/percpu_counter.h>
+#include <uapi/linux/nfsd/export.h>
+#include <linux/nfs4.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;
+};
+
+/* Per-export stats */
+enum {
+ EXP_STATS_FH_STALE,
+ EXP_STATS_IO_READ,
+ EXP_STATS_IO_WRITE,
+ EXP_STATS_COUNTERS_NUM
+};
+
+struct export_stats {
+ time64_t start_time;
+ struct percpu_counter counter[EXP_STATS_COUNTERS_NUM];
+};
+
+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];
+ u32 ex_layout_types;
+ struct nfsd4_deviceid_map *ex_devid_map;
+ struct cache_detail *cd;
+ struct rcu_head ex_rcu;
+ struct export_stats ex_stats;
+ unsigned long ex_xprtsec_modes;
+};
+
+/* 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;
+ struct rcu_head ek_rcu;
+};
+
+#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 *);
+
+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 */