Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 489 insertions, 0 deletions

diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
new file mode 100644
index 00000000..89ab137d
--- /dev/null
+++ b/fs/nfsd/state.h
@@ -0,0 +1,489 @@
+/*
+ *  Copyright (c) 2001 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Kendrick Smith <kmsmith@umich.edu>
+ *  Andy Adamson <andros@umich.edu>
+ *  
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *  
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef _NFSD4_STATE_H
+#define _NFSD4_STATE_H
+
+#include <linux/idr.h>
+#include <linux/sunrpc/svc_xprt.h>
+#include <linux/nfsd/nfsfh.h>
+#include "nfsfh.h"
+
+typedef struct {
+	u32             cl_boot;
+	u32             cl_id;
+} clientid_t;
+
+typedef struct {
+	clientid_t	so_clid;
+	u32		so_id;
+} stateid_opaque_t;
+
+typedef struct {
+	u32                     si_generation;
+	stateid_opaque_t        si_opaque;
+} stateid_t;
+
+#define STATEID_FMT	"(%08x/%08x/%08x/%08x)"
+#define STATEID_VAL(s) \
+	(s)->si_opaque.so_clid.cl_boot, \
+	(s)->si_opaque.so_clid.cl_id, \
+	(s)->si_opaque.so_id, \
+	(s)->si_generation
+
+struct nfsd4_callback {
+	void *cb_op;
+	struct nfs4_client *cb_clp;
+	struct list_head cb_per_client;
+	u32 cb_minorversion;
+	struct rpc_message cb_msg;
+	const struct rpc_call_ops *cb_ops;
+	struct work_struct cb_work;
+	bool cb_done;
+};
+
+struct nfs4_stid {
+#define NFS4_OPEN_STID 1
+#define NFS4_LOCK_STID 2
+#define NFS4_DELEG_STID 4
+/* For an open stateid kept around *only* to process close replays: */
+#define NFS4_CLOSED_STID 8
+	unsigned char sc_type;
+	stateid_t sc_stateid;
+	struct nfs4_client *sc_client;
+};
+
+struct nfs4_delegation {
+	struct nfs4_stid	dl_stid; /* must be first field */
+	struct list_head	dl_perfile;
+	struct list_head	dl_perclnt;
+	struct list_head	dl_recall_lru;  /* delegation recalled */
+	atomic_t		dl_count;       /* ref count */
+	struct nfs4_file	*dl_file;
+	u32			dl_type;
+	time_t			dl_time;
+/* For recall: */
+	struct knfsd_fh		dl_fh;
+	int			dl_retries;
+	struct nfsd4_callback	dl_recall;
+};
+
+/* client delegation callback info */
+struct nfs4_cb_conn {
+	/* SETCLIENTID info */
+	struct sockaddr_storage	cb_addr;
+	struct sockaddr_storage	cb_saddr;
+	size_t			cb_addrlen;
+	u32                     cb_prog; /* used only in 4.0 case;
+					    per-session otherwise */
+	u32                     cb_ident;	/* minorversion 0 only */
+	struct svc_xprt		*cb_xprt;	/* minorversion 1 only */
+};
+
+static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
+{
+	return container_of(s, struct nfs4_delegation, dl_stid);
+}
+
+/* Maximum number of slots per session. 160 is useful for long haul TCP */
+#define NFSD_MAX_SLOTS_PER_SESSION     160
+/* Maximum number of operations per session compound */
+#define NFSD_MAX_OPS_PER_COMPOUND	16
+/* Maximum  session per slot cache size */
+#define NFSD_SLOT_CACHE_SIZE		1024
+/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
+#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION	32
+#define NFSD_MAX_MEM_PER_SESSION  \
+		(NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
+
+struct nfsd4_slot {
+	u32	sl_seqid;
+	__be32	sl_status;
+	u32	sl_datalen;
+	u16	sl_opcnt;
+#define NFSD4_SLOT_INUSE	(1 << 0)
+#define NFSD4_SLOT_CACHETHIS	(1 << 1)
+#define NFSD4_SLOT_INITIALIZED	(1 << 2)
+	u8	sl_flags;
+	char	sl_data[];
+};
+
+struct nfsd4_channel_attrs {
+	u32		headerpadsz;
+	u32		maxreq_sz;
+	u32		maxresp_sz;
+	u32		maxresp_cached;
+	u32		maxops;
+	u32		maxreqs;
+	u32		nr_rdma_attrs;
+	u32		rdma_attrs;
+};
+
+struct nfsd4_create_session {
+	clientid_t			clientid;
+	struct nfs4_sessionid		sessionid;
+	u32				seqid;
+	u32				flags;
+	struct nfsd4_channel_attrs	fore_channel;
+	struct nfsd4_channel_attrs	back_channel;
+	u32				callback_prog;
+	u32				uid;
+	u32				gid;
+};
+
+struct nfsd4_bind_conn_to_session {
+	struct nfs4_sessionid		sessionid;
+	u32				dir;
+};
+
+/* The single slot clientid cache structure */
+struct nfsd4_clid_slot {
+	u32				sl_seqid;
+	__be32				sl_status;
+	struct nfsd4_create_session	sl_cr_ses;
+};
+
+struct nfsd4_conn {
+	struct list_head cn_persession;
+	struct svc_xprt *cn_xprt;
+	struct svc_xpt_user cn_xpt_user;
+	struct nfsd4_session *cn_session;
+/* CDFC4_FORE, CDFC4_BACK: */
+	unsigned char cn_flags;
+};
+
+struct nfsd4_session {
+	struct kref		se_ref;
+	struct list_head	se_hash;	/* hash by sessionid */
+	struct list_head	se_perclnt;
+	u32			se_flags;
+	struct nfs4_client	*se_client;
+	struct nfs4_sessionid	se_sessionid;
+	struct nfsd4_channel_attrs se_fchannel;
+	struct nfsd4_channel_attrs se_bchannel;
+	struct list_head	se_conns;
+	u32			se_cb_prog;
+	u32			se_cb_seq_nr;
+	struct nfsd4_slot	*se_slots[];	/* forward channel slots */
+};
+
+extern void nfsd4_put_session(struct nfsd4_session *ses);
+
+/* formatted contents of nfs4_sessionid */
+struct nfsd4_sessionid {
+	clientid_t	clientid;
+	u32		sequence;
+	u32		reserved;
+};
+
+#define HEXDIR_LEN     33 /* hex version of 16 byte md5 of cl_name plus '\0' */
+
+/*
+ * struct nfs4_client - one per client.  Clientids live here.
+ * 	o Each nfs4_client is hashed by clientid.
+ *
+ * 	o Each nfs4_clients is also hashed by name 
+ * 	  (the opaque quantity initially sent by the client to identify itself).
+ * 	  
+ *	o cl_perclient list is used to ensure no dangling stateowner references
+ *	  when we expire the nfs4_client
+ */
+struct nfs4_client {
+	struct list_head	cl_idhash; 	/* hash by cl_clientid.id */
+	struct list_head	cl_strhash; 	/* hash by cl_name */
+	struct list_head	cl_openowners;
+	struct idr		cl_stateids;	/* stateid lookup */
+	struct list_head	cl_delegations;
+	struct list_head        cl_lru;         /* tail queue */
+	struct xdr_netobj	cl_name; 	/* id generated by client */
+	char                    cl_recdir[HEXDIR_LEN]; /* recovery dir */
+	nfs4_verifier		cl_verifier; 	/* generated by client */
+	time_t                  cl_time;        /* time of last lease renewal */
+	struct sockaddr_storage	cl_addr; 	/* client ipaddress */
+	u32			cl_flavor;	/* setclientid pseudoflavor */
+	char			*cl_principal;	/* setclientid principal name */
+	struct svc_cred		cl_cred; 	/* setclientid principal */
+	clientid_t		cl_clientid;	/* generated by server */
+	nfs4_verifier		cl_confirm;	/* generated by server */
+	u32			cl_minorversion;
+
+	/* for v4.0 and v4.1 callbacks: */
+	struct nfs4_cb_conn	cl_cb_conn;
+#define NFSD4_CLIENT_CB_UPDATE		(0)
+#define NFSD4_CLIENT_CB_KILL		(1)
+#define NFSD4_CLIENT_STABLE		(2)	/* client on stable storage */
+#define NFSD4_CLIENT_RECLAIM_COMPLETE	(3)	/* reclaim_complete done */
+#define NFSD4_CLIENT_CB_FLAG_MASK	(1 << NFSD4_CLIENT_CB_UPDATE | \
+					 1 << NFSD4_CLIENT_CB_KILL)
+	unsigned long		cl_flags;
+	struct rpc_clnt		*cl_cb_client;
+	u32			cl_cb_ident;
+#define NFSD4_CB_UP		0
+#define NFSD4_CB_UNKNOWN	1
+#define NFSD4_CB_DOWN		2
+#define NFSD4_CB_FAULT		3
+	int			cl_cb_state;
+	struct nfsd4_callback	cl_cb_null;
+	struct nfsd4_session	*cl_cb_session;
+	struct list_head	cl_callbacks; /* list of in-progress callbacks */
+
+	/* for all client information that callback code might need: */
+	spinlock_t		cl_lock;
+
+	/* for nfs41 */
+	struct list_head	cl_sessions;
+	struct nfsd4_clid_slot	cl_cs_slot;	/* create_session slot */
+	u32			cl_exchange_flags;
+	/* number of rpc's in progress over an associated session: */
+	atomic_t		cl_refcount;
+
+	/* for nfs41 callbacks */
+	/* We currently support a single back channel with a single slot */
+	unsigned long		cl_cb_slot_busy;
+	struct rpc_wait_queue	cl_cb_waitq;	/* backchannel callers may */
+						/* wait here for slots */
+};
+
+static inline void
+mark_client_expired(struct nfs4_client *clp)
+{
+	clp->cl_time = 0;
+}
+
+static inline bool
+is_client_expired(struct nfs4_client *clp)
+{
+	return clp->cl_time == 0;
+}
+
+/* struct nfs4_client_reset
+ * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
+ * upon lease reset, or from upcall to state_daemon (to read in state
+ * from non-volitile storage) upon reboot.
+ */
+struct nfs4_client_reclaim {
+	struct list_head	cr_strhash;	/* hash by cr_name */
+	char			cr_recdir[HEXDIR_LEN]; /* recover dir */
+};
+
+static inline void
+update_stateid(stateid_t *stateid)
+{
+	stateid->si_generation++;
+	/* Wraparound recommendation from 3530bis-13 9.1.3.2: */
+	if (stateid->si_generation == 0)
+		stateid->si_generation = 1;
+}
+
+/* A reasonable value for REPLAY_ISIZE was estimated as follows:  
+ * The OPEN response, typically the largest, requires 
+ *   4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) +  8(verifier) + 
+ *   4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 
+ *   20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 
+ */
+
+#define NFSD4_REPLAY_ISIZE       112 
+
+/*
+ * Replay buffer, where the result of the last seqid-mutating operation 
+ * is cached. 
+ */
+struct nfs4_replay {
+	__be32			rp_status;
+	unsigned int		rp_buflen;
+	char			*rp_buf;
+	struct knfsd_fh		rp_openfh;
+	char			rp_ibuf[NFSD4_REPLAY_ISIZE];
+};
+
+struct nfs4_stateowner {
+	struct list_head        so_strhash;   /* hash by op_name */
+	struct list_head        so_stateids;
+	struct nfs4_client *    so_client;
+	/* after increment in ENCODE_SEQID_OP_TAIL, represents the next
+	 * sequence id expected from the client: */
+	u32                     so_seqid;
+	struct xdr_netobj       so_owner;     /* open owner name */
+	struct nfs4_replay	so_replay;
+	bool			so_is_open_owner;
+};
+
+struct nfs4_openowner {
+	struct nfs4_stateowner	oo_owner; /* must be first field */
+	struct list_head        oo_perclient;
+	/*
+	 * We keep around openowners a little while after last close,
+	 * which saves clients from having to confirm, and allows us to
+	 * handle close replays if they come soon enough.  The close_lru
+	 * is a list of such openowners, to be reaped by the laundromat
+	 * thread eventually if they remain unused:
+	 */
+	struct list_head	oo_close_lru;
+	struct nfs4_ol_stateid *oo_last_closed_stid;
+	time_t			oo_time; /* time of placement on so_close_lru */
+#define NFS4_OO_CONFIRMED   1
+#define NFS4_OO_PURGE_CLOSE 2
+#define NFS4_OO_NEW         4
+	unsigned char		oo_flags;
+};
+
+struct nfs4_lockowner {
+	struct nfs4_stateowner	lo_owner; /* must be first element */
+	struct list_head	lo_owner_ino_hash; /* hash by owner,file */
+	struct list_head        lo_perstateid; /* for lockowners only */
+	struct list_head	lo_list; /* for temporary uses */
+};
+
+static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
+{
+	return container_of(so, struct nfs4_openowner, oo_owner);
+}
+
+static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
+{
+	return container_of(so, struct nfs4_lockowner, lo_owner);
+}
+
+/*
+*  nfs4_file: a file opened by some number of (open) nfs4_stateowners.
+*    o fi_perfile list is used to search for conflicting 
+*      share_acces, share_deny on the file.
+*/
+struct nfs4_file {
+	atomic_t		fi_ref;
+	struct list_head        fi_hash;    /* hash by "struct inode *" */
+	struct list_head        fi_stateids;
+	struct list_head	fi_delegations;
+	/* One each for O_RDONLY, O_WRONLY, O_RDWR: */
+	struct file *		fi_fds[3];
+	/*
+	 * Each open or lock stateid contributes 0-4 to the counts
+	 * below depending on which bits are set in st_access_bitmap:
+	 *     1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
+	 *   + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
+	 *   + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
+	 */
+	atomic_t		fi_access[2];
+	struct file		*fi_deleg_file;
+	struct file_lock	*fi_lease;
+	atomic_t		fi_delegees;
+	struct inode		*fi_inode;
+	bool			fi_had_conflict;
+};
+
+/* XXX: for first cut may fall back on returning file that doesn't work
+ * at all? */
+static inline struct file *find_writeable_file(struct nfs4_file *f)
+{
+	if (f->fi_fds[O_WRONLY])
+		return f->fi_fds[O_WRONLY];
+	return f->fi_fds[O_RDWR];
+}
+
+static inline struct file *find_readable_file(struct nfs4_file *f)
+{
+	if (f->fi_fds[O_RDONLY])
+		return f->fi_fds[O_RDONLY];
+	return f->fi_fds[O_RDWR];
+}
+
+static inline struct file *find_any_file(struct nfs4_file *f)
+{
+	if (f->fi_fds[O_RDWR])
+		return f->fi_fds[O_RDWR];
+	else if (f->fi_fds[O_WRONLY])
+		return f->fi_fds[O_WRONLY];
+	else
+		return f->fi_fds[O_RDONLY];
+}
+
+/* "ol" stands for "Open or Lock".  Better suggestions welcome. */
+struct nfs4_ol_stateid {
+	struct nfs4_stid    st_stid; /* must be first field */
+	struct list_head              st_perfile;
+	struct list_head              st_perstateowner;
+	struct list_head              st_lockowners;
+	struct nfs4_stateowner      * st_stateowner;
+	struct nfs4_file            * st_file;
+	unsigned long                 st_access_bmap;
+	unsigned long                 st_deny_bmap;
+	struct nfs4_ol_stateid         * st_openstp;
+};
+
+static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
+{
+	return container_of(s, struct nfs4_ol_stateid, st_stid);
+}
+
+/* flags for preprocess_seqid_op() */
+#define RD_STATE	        0x00000010
+#define WR_STATE	        0x00000020
+
+struct nfsd4_compound_state;
+
+extern __be32 nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate,
+		stateid_t *stateid, int flags, struct file **filp);
+extern void nfs4_lock_state(void);
+extern void nfs4_unlock_state(void);
+extern int nfs4_in_grace(void);
+extern void nfs4_release_reclaim(void);
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct nfs4_client *crp);
+extern __be32 nfs4_check_open_reclaim(clientid_t *clid);
+extern void nfs4_free_openowner(struct nfs4_openowner *);
+extern void nfs4_free_lockowner(struct nfs4_lockowner *);
+extern int set_callback_cred(void);
+extern void nfsd4_probe_callback(struct nfs4_client *clp);
+extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
+extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
+extern void nfsd4_do_callback_rpc(struct work_struct *);
+extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
+extern int nfsd4_create_callback_queue(void);
+extern void nfsd4_destroy_callback_queue(void);
+extern void nfsd4_shutdown_callback(struct nfs4_client *);
+extern void nfs4_put_delegation(struct nfs4_delegation *dp);
+extern __be32 nfs4_make_rec_clidname(char *clidname, struct xdr_netobj *clname);
+extern int nfs4_client_to_reclaim(const char *name);
+extern int nfs4_has_reclaimed_state(const char *name, bool use_exchange_id);
+extern void release_session_client(struct nfsd4_session *);
+extern __be32 nfs4_validate_stateid(struct nfs4_client *, stateid_t *);
+extern void nfsd4_purge_closed_stateid(struct nfs4_stateowner *);
+
+/* nfs4recover operations */
+extern int nfsd4_client_tracking_init(struct net *net);
+extern void nfsd4_client_tracking_exit(struct net *net);
+extern void nfsd4_client_record_create(struct nfs4_client *clp);
+extern void nfsd4_client_record_remove(struct nfs4_client *clp);
+extern int nfsd4_client_record_check(struct nfs4_client *clp);
+extern void nfsd4_record_grace_done(struct net *net, time_t boot_time);
+#endif   /* NFSD4_STATE_H */