/* SPDX-License-Identifier: GPL-2.0 */
/*
 * Hodge-podge collection of knfsd-related stuff.
 * I will sort this out later.
 *
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef LINUX_NFSD_NFSD_H
#define LINUX_NFSD_NFSD_H

#include <linux/types.h>
#include <linux/mount.h>

#include <linux/nfs.h>
#include <linux/nfs2.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svc_xprt.h>
#include <linux/sunrpc/msg_prot.h>
#include <linux/sunrpc/addr.h>

#include <uapi/linux/nfsd/debug.h>

#include "export.h"

#undef ifdebug
#ifdef CONFIG_SUNRPC_DEBUG
# define ifdebug(flag)          if (nfsd_debug & NFSDDBG_##flag)
#else
# define ifdebug(flag)          if (0)
#endif

/*
 * nfsd version
 */
#define NFSD_MINVERS                    2
#define NFSD_MAXVERS                    4
#define NFSD_SUPPORTED_MINOR_VERSION    2
bool nfsd_support_version(int vers);

#include "netns.h"
#include "stats.h"

/*
 * Default and maximum payload size (NFS READ or WRITE), in bytes.
 * The default is historical, and the maximum is an implementation
 * limit.
 */
enum {
        NFSSVC_DEFBLKSIZE       = 1 * 1024 * 1024,
        NFSSVC_MAXBLKSIZE       = RPCSVC_MAXPAYLOAD,
};

struct readdir_cd {
        __be32                  err;    /* 0, nfserr, or nfserr_eof */
};

/* Maximum number of operations per session compound */
#define NFSD_MAX_OPS_PER_COMPOUND       200

struct nfsd_genl_rqstp {
        struct sockaddr         rq_daddr;
        struct sockaddr         rq_saddr;
        unsigned long           rq_flags;
        ktime_t                 rq_stime;
        __be32                  rq_xid;
        u32                     rq_vers;
        u32                     rq_prog;
        u32                     rq_proc;

        /* NFSv4 compound */
        u32                     rq_opcnt;
        u32                     rq_opnum[16];
};

extern struct svc_program       nfsd_programs[];
extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4;
extern struct mutex             nfsd_mutex;
extern atomic_t                 nfsd_th_cnt;            /* number of available threads */

extern const struct seq_operations nfs_exports_op;

/*
 * Common void argument and result helpers
 */
struct nfsd_voidargs { };
struct nfsd_voidres { };
bool            nfssvc_decode_voidarg(struct svc_rqst *rqstp,
                                      struct xdr_stream *xdr);
bool            nfssvc_encode_voidres(struct svc_rqst *rqstp,
                                      struct xdr_stream *xdr);

/*
 * Function prototypes.
 */
int             nfsd_svc(int n, int *nservers, struct net *net,
                         const struct cred *cred, const char *scope);
int             nfsd_dispatch(struct svc_rqst *rqstp);

int             nfsd_nrthreads(struct net *);
int             nfsd_nrpools(struct net *);
int             nfsd_get_nrthreads(int n, int *, struct net *);
int             nfsd_set_nrthreads(int n, int *, struct net *);
void            nfsd_shutdown_threads(struct net *net);

struct svc_rqst *nfsd_current_rqst(void);

struct nfsdfs_client {
        struct kref cl_ref;
        void (*cl_release)(struct kref *kref);
};

struct nfsdfs_client *get_nfsdfs_client(struct inode *);
struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
                                 struct nfsdfs_client *ncl, u32 id,
                                 const struct tree_descr *,
                                 struct dentry **fdentries);
void nfsd_client_rmdir(struct dentry *dentry);


#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
#ifdef CONFIG_NFSD_V2_ACL
extern const struct svc_version nfsd_acl_version2;
#else
#define nfsd_acl_version2 NULL
#endif
#ifdef CONFIG_NFSD_V3_ACL
extern const struct svc_version nfsd_acl_version3;
#else
#define nfsd_acl_version3 NULL
#endif
#endif

#if IS_ENABLED(CONFIG_NFS_LOCALIO)
extern const struct svc_version localio_version1;
#endif

struct nfsd_net;

enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
void nfsd_reset_versions(struct nfsd_net *nn);
int nfsd_create_serv(struct net *net);
void nfsd_destroy_serv(struct net *net);

#ifdef CONFIG_DEBUG_FS
void nfsd_debugfs_init(void);
void nfsd_debugfs_exit(void);
#else
static inline void nfsd_debugfs_init(void) {}
static inline void nfsd_debugfs_exit(void) {}
#endif

extern bool nfsd_disable_splice_read __read_mostly;

enum {
        /* Any new NFSD_IO enum value must be added at the end */
        NFSD_IO_BUFFERED,
        NFSD_IO_DONTCACHE,
        NFSD_IO_DIRECT,
};

extern u64 nfsd_io_cache_read __read_mostly;
extern u64 nfsd_io_cache_write __read_mostly;

extern int nfsd_max_blksize;

static inline int nfsd_v4client(struct svc_rqst *rq)
{
        return rq && rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
}
static inline struct user_namespace *
nfsd_user_namespace(const struct svc_rqst *rqstp)
{
        const struct cred *cred = rqstp->rq_xprt->xpt_cred;
        return cred ? cred->user_ns : &init_user_ns;
}

/* 
 * NFSv4 State
 */
#ifdef CONFIG_NFSD_V4
extern unsigned long max_delegations;
int nfsd4_init_slabs(void);
void nfsd4_free_slabs(void);
int nfs4_state_start(void);
int nfs4_state_start_net(struct net *net);
void nfs4_state_shutdown(void);
void nfs4_state_shutdown_net(struct net *net);
int nfs4_reset_recoverydir(char *recdir);
char * nfs4_recoverydir(void);
bool nfsd4_spo_must_allow(struct svc_rqst *rqstp);
int nfsd4_create_laundry_wq(void);
void nfsd4_destroy_laundry_wq(void);
bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode);
#else
static inline int nfsd4_init_slabs(void) { return 0; }
static inline void nfsd4_free_slabs(void) { }
static inline int nfs4_state_start(void) { return 0; }
static inline int nfs4_state_start_net(struct net *net) { return 0; }
static inline void nfs4_state_shutdown(void) { }
static inline void nfs4_state_shutdown_net(struct net *net) { }
static inline int nfs4_reset_recoverydir(char *recdir) { return 0; }
static inline char * nfs4_recoverydir(void) {return NULL; }
static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp)
{
        return false;
}
static inline int nfsd4_create_laundry_wq(void) { return 0; };
static inline void nfsd4_destroy_laundry_wq(void) {};
static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp,
                                              struct inode *inode)
{
        return false;
}
#endif

/*
 * lockd binding
 */
void            nfsd_lockd_init(void);
void            nfsd_lockd_shutdown(void);


/*
 * These macros provide pre-xdr'ed values for faster operation.
 */
#define nfs_ok                  cpu_to_be32(NFS_OK)
#define nfserr_perm             cpu_to_be32(NFSERR_PERM)
#define nfserr_noent            cpu_to_be32(NFSERR_NOENT)
#define nfserr_io               cpu_to_be32(NFSERR_IO)
#define nfserr_nxio             cpu_to_be32(NFSERR_NXIO)
#define nfserr_acces            cpu_to_be32(NFSERR_ACCES)
#define nfserr_exist            cpu_to_be32(NFSERR_EXIST)
#define nfserr_xdev             cpu_to_be32(NFSERR_XDEV)
#define nfserr_nodev            cpu_to_be32(NFSERR_NODEV)
#define nfserr_notdir           cpu_to_be32(NFSERR_NOTDIR)
#define nfserr_isdir            cpu_to_be32(NFSERR_ISDIR)
#define nfserr_inval            cpu_to_be32(NFSERR_INVAL)
#define nfserr_fbig             cpu_to_be32(NFSERR_FBIG)
#define nfserr_nospc            cpu_to_be32(NFSERR_NOSPC)
#define nfserr_rofs             cpu_to_be32(NFSERR_ROFS)
#define nfserr_mlink            cpu_to_be32(NFSERR_MLINK)
#define nfserr_nametoolong      cpu_to_be32(NFSERR_NAMETOOLONG)
#define nfserr_notempty         cpu_to_be32(NFSERR_NOTEMPTY)
#define nfserr_dquot            cpu_to_be32(NFSERR_DQUOT)
#define nfserr_stale            cpu_to_be32(NFSERR_STALE)
#define nfserr_remote           cpu_to_be32(NFSERR_REMOTE)
#define nfserr_wflush           cpu_to_be32(NFSERR_WFLUSH)
#define nfserr_badhandle        cpu_to_be32(NFSERR_BADHANDLE)
#define nfserr_notsync          cpu_to_be32(NFSERR_NOT_SYNC)
#define nfserr_badcookie        cpu_to_be32(NFSERR_BAD_COOKIE)
#define nfserr_notsupp          cpu_to_be32(NFSERR_NOTSUPP)
#define nfserr_toosmall         cpu_to_be32(NFSERR_TOOSMALL)
#define nfserr_serverfault      cpu_to_be32(NFSERR_SERVERFAULT)
#define nfserr_badtype          cpu_to_be32(NFSERR_BADTYPE)
#define nfserr_jukebox          cpu_to_be32(NFSERR_JUKEBOX)
#define nfserr_denied           cpu_to_be32(NFSERR_DENIED)
#define nfserr_deadlock         cpu_to_be32(NFSERR_DEADLOCK)
#define nfserr_expired          cpu_to_be32(NFSERR_EXPIRED)
#define nfserr_bad_cookie       cpu_to_be32(NFSERR_BAD_COOKIE)
#define nfserr_same             cpu_to_be32(NFSERR_SAME)
#define nfserr_clid_inuse       cpu_to_be32(NFSERR_CLID_INUSE)
#define nfserr_stale_clientid   cpu_to_be32(NFSERR_STALE_CLIENTID)
#define nfserr_resource         cpu_to_be32(NFSERR_RESOURCE)
#define nfserr_moved            cpu_to_be32(NFSERR_MOVED)
#define nfserr_nofilehandle     cpu_to_be32(NFSERR_NOFILEHANDLE)
#define nfserr_minor_vers_mismatch      cpu_to_be32(NFSERR_MINOR_VERS_MISMATCH)
#define nfserr_share_denied     cpu_to_be32(NFSERR_SHARE_DENIED)
#define nfserr_stale_stateid    cpu_to_be32(NFSERR_STALE_STATEID)
#define nfserr_old_stateid      cpu_to_be32(NFSERR_OLD_STATEID)
#define nfserr_bad_stateid      cpu_to_be32(NFSERR_BAD_STATEID)
#define nfserr_bad_seqid        cpu_to_be32(NFSERR_BAD_SEQID)
#define nfserr_symlink          cpu_to_be32(NFSERR_SYMLINK)
#define nfserr_not_same         cpu_to_be32(NFSERR_NOT_SAME)
#define nfserr_lock_range       cpu_to_be32(NFSERR_LOCK_RANGE)
#define nfserr_restorefh        cpu_to_be32(NFSERR_RESTOREFH)
#define nfserr_attrnotsupp      cpu_to_be32(NFSERR_ATTRNOTSUPP)
#define nfserr_bad_xdr          cpu_to_be32(NFSERR_BAD_XDR)
#define nfserr_openmode         cpu_to_be32(NFSERR_OPENMODE)
#define nfserr_badowner         cpu_to_be32(NFSERR_BADOWNER)
#define nfserr_locks_held       cpu_to_be32(NFSERR_LOCKS_HELD)
#define nfserr_op_illegal       cpu_to_be32(NFSERR_OP_ILLEGAL)
#define nfserr_grace            cpu_to_be32(NFSERR_GRACE)
#define nfserr_no_grace         cpu_to_be32(NFSERR_NO_GRACE)
#define nfserr_reclaim_bad      cpu_to_be32(NFSERR_RECLAIM_BAD)
#define nfserr_badname          cpu_to_be32(NFSERR_BADNAME)
#define nfserr_admin_revoked    cpu_to_be32(NFS4ERR_ADMIN_REVOKED)
#define nfserr_cb_path_down     cpu_to_be32(NFSERR_CB_PATH_DOWN)
#define nfserr_locked           cpu_to_be32(NFSERR_LOCKED)
#define nfserr_wrongsec         cpu_to_be32(NFSERR_WRONGSEC)
#define nfserr_delay                    cpu_to_be32(NFS4ERR_DELAY)
#define nfserr_badiomode                cpu_to_be32(NFS4ERR_BADIOMODE)
#define nfserr_badlayout                cpu_to_be32(NFS4ERR_BADLAYOUT)
#define nfserr_bad_session_digest       cpu_to_be32(NFS4ERR_BAD_SESSION_DIGEST)
#define nfserr_badsession               cpu_to_be32(NFS4ERR_BADSESSION)
#define nfserr_badslot                  cpu_to_be32(NFS4ERR_BADSLOT)
#define nfserr_complete_already         cpu_to_be32(NFS4ERR_COMPLETE_ALREADY)
#define nfserr_conn_not_bound_to_session cpu_to_be32(NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
#define nfserr_deleg_already_wanted     cpu_to_be32(NFS4ERR_DELEG_ALREADY_WANTED)
#define nfserr_back_chan_busy           cpu_to_be32(NFS4ERR_BACK_CHAN_BUSY)
#define nfserr_layouttrylater           cpu_to_be32(NFS4ERR_LAYOUTTRYLATER)
#define nfserr_layoutunavailable        cpu_to_be32(NFS4ERR_LAYOUTUNAVAILABLE)
#define nfserr_nomatching_layout        cpu_to_be32(NFS4ERR_NOMATCHING_LAYOUT)
#define nfserr_recallconflict           cpu_to_be32(NFS4ERR_RECALLCONFLICT)
#define nfserr_unknown_layouttype       cpu_to_be32(NFS4ERR_UNKNOWN_LAYOUTTYPE)
#define nfserr_seq_misordered           cpu_to_be32(NFS4ERR_SEQ_MISORDERED)
#define nfserr_sequence_pos             cpu_to_be32(NFS4ERR_SEQUENCE_POS)
#define nfserr_req_too_big              cpu_to_be32(NFS4ERR_REQ_TOO_BIG)
#define nfserr_rep_too_big              cpu_to_be32(NFS4ERR_REP_TOO_BIG)
#define nfserr_rep_too_big_to_cache     cpu_to_be32(NFS4ERR_REP_TOO_BIG_TO_CACHE)
#define nfserr_retry_uncached_rep       cpu_to_be32(NFS4ERR_RETRY_UNCACHED_REP)
#define nfserr_unsafe_compound          cpu_to_be32(NFS4ERR_UNSAFE_COMPOUND)
#define nfserr_too_many_ops             cpu_to_be32(NFS4ERR_TOO_MANY_OPS)
#define nfserr_op_not_in_session        cpu_to_be32(NFS4ERR_OP_NOT_IN_SESSION)
#define nfserr_hash_alg_unsupp          cpu_to_be32(NFS4ERR_HASH_ALG_UNSUPP)
#define nfserr_clientid_busy            cpu_to_be32(NFS4ERR_CLIENTID_BUSY)
#define nfserr_pnfs_io_hole             cpu_to_be32(NFS4ERR_PNFS_IO_HOLE)
#define nfserr_seq_false_retry          cpu_to_be32(NFS4ERR_SEQ_FALSE_RETRY)
#define nfserr_bad_high_slot            cpu_to_be32(NFS4ERR_BAD_HIGH_SLOT)
#define nfserr_deadsession              cpu_to_be32(NFS4ERR_DEADSESSION)
#define nfserr_encr_alg_unsupp          cpu_to_be32(NFS4ERR_ENCR_ALG_UNSUPP)
#define nfserr_pnfs_no_layout           cpu_to_be32(NFS4ERR_PNFS_NO_LAYOUT)
#define nfserr_not_only_op              cpu_to_be32(NFS4ERR_NOT_ONLY_OP)
#define nfserr_wrong_cred               cpu_to_be32(NFS4ERR_WRONG_CRED)
#define nfserr_wrong_type               cpu_to_be32(NFS4ERR_WRONG_TYPE)
#define nfserr_dirdeleg_unavail         cpu_to_be32(NFS4ERR_DIRDELEG_UNAVAIL)
#define nfserr_reject_deleg             cpu_to_be32(NFS4ERR_REJECT_DELEG)
#define nfserr_returnconflict           cpu_to_be32(NFS4ERR_RETURNCONFLICT)
#define nfserr_deleg_revoked            cpu_to_be32(NFS4ERR_DELEG_REVOKED)
#define nfserr_partner_notsupp          cpu_to_be32(NFS4ERR_PARTNER_NOTSUPP)
#define nfserr_partner_no_auth          cpu_to_be32(NFS4ERR_PARTNER_NO_AUTH)
#define nfserr_union_notsupp            cpu_to_be32(NFS4ERR_UNION_NOTSUPP)
#define nfserr_offload_denied           cpu_to_be32(NFS4ERR_OFFLOAD_DENIED)
#define nfserr_wrong_lfs                cpu_to_be32(NFS4ERR_WRONG_LFS)
#define nfserr_badlabel                 cpu_to_be32(NFS4ERR_BADLABEL)
#define nfserr_file_open                cpu_to_be32(NFS4ERR_FILE_OPEN)
#define nfserr_xattr2big                cpu_to_be32(NFS4ERR_XATTR2BIG)
#define nfserr_noxattr                  cpu_to_be32(NFS4ERR_NOXATTR)

/*
 * Error codes for internal use.  We use enum to choose numbers that are
 * not already assigned, then covert to be32 resulting in a number that
 * cannot conflict with any existing be32 nfserr value.
 */
enum {
/* end-of-file indicator in readdir */
        NFSERR_EOF = NFS4ERR_FIRST_FREE,
#define nfserr_eof              cpu_to_be32(NFSERR_EOF)

/* replay detected */
        NFSERR_REPLAY_ME,
#define nfserr_replay_me        cpu_to_be32(NFSERR_REPLAY_ME)

/* nfs41 replay detected */
        NFSERR_REPLAY_CACHE,
#define nfserr_replay_cache     cpu_to_be32(NFSERR_REPLAY_CACHE)

/* symlink found where dir expected - handled differently to
 * other symlink found errors by NFSv3.
 */
        NFSERR_SYMLINK_NOT_DIR,
#define nfserr_symlink_not_dir  cpu_to_be32(NFSERR_SYMLINK_NOT_DIR)
};

/* Check for dir entries '.' and '..' */
#define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))

#ifdef CONFIG_NFSD_V4

/* before processing a COMPOUND operation, we have to check that there
 * is enough space in the buffer for XDR encode to succeed.  otherwise,
 * we might process an operation with side effects, and be unable to
 * tell the client that the operation succeeded.
 *
 * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 * READ, READDIR, and READLINK have their own buffer checks.)  if we
 * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 *
 * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 * care is taken to ensure that we never fall below this level for any
 * reason.
 */
#define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
#define COMPOUND_ERR_SLACK_SPACE        16     /* OP_SETATTR */

#define NFSD_LAUNDROMAT_MINTIMEOUT      1   /* seconds */
#define NFSD_COURTESY_CLIENT_TIMEOUT    (24 * 60 * 60)  /* seconds */
#define NFSD_CLIENT_MAX_TRIM_PER_RUN    128
#define NFS4_CLIENTS_PER_GB             1024
#define NFSD_DELEGRETURN_TIMEOUT        (HZ / 34)       /* 30ms */
#define NFSD_CB_GETATTR_TIMEOUT         NFSD_DELEGRETURN_TIMEOUT

/*
 * The following attributes are not implemented by NFSD:
 *    ARCHIVE       (deprecated anyway)
 *    HIDDEN        (unlikely to be supported any time soon)
 *    MIMETYPE      (unlikely to be supported any time soon)
 *    QUOTA_*       (will be supported in a forthcoming patch)
 *    SYSTEM        (unlikely to be supported any time soon)
 *    TIME_BACKUP   (unlikely to be supported any time soon)
 */
#define NFSD4_SUPPORTED_ATTRS_WORD0                                                         \
(FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)

#define NFSD4_SUPPORTED_ATTRS_WORD1                                                         \
(FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 | FATTR4_WORD1_TIME_DELTA      | FATTR4_WORD1_TIME_METADATA   | FATTR4_WORD1_TIME_CREATE      \
 | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)

#define NFSD4_SUPPORTED_ATTRS_WORD2 0

/* 4.1 */
#ifdef CONFIG_NFSD_PNFS
#define PNFSD_SUPPORTED_ATTRS_WORD1     FATTR4_WORD1_FS_LAYOUT_TYPES
#define PNFSD_SUPPORTED_ATTRS_WORD2 \
(FATTR4_WORD2_LAYOUT_BLKSIZE    | FATTR4_WORD2_LAYOUT_TYPES)
#else
#define PNFSD_SUPPORTED_ATTRS_WORD1     0
#define PNFSD_SUPPORTED_ATTRS_WORD2     0
#endif /* CONFIG_NFSD_PNFS */

#define NFSD4_1_SUPPORTED_ATTRS_WORD0 \
        NFSD4_SUPPORTED_ATTRS_WORD0

#define NFSD4_1_SUPPORTED_ATTRS_WORD1 \
        (NFSD4_SUPPORTED_ATTRS_WORD1    | PNFSD_SUPPORTED_ATTRS_WORD1)

#define NFSD4_1_SUPPORTED_ATTRS_WORD2 \
        (NFSD4_SUPPORTED_ATTRS_WORD2    | PNFSD_SUPPORTED_ATTRS_WORD2 | \
         FATTR4_WORD2_SUPPATTR_EXCLCREAT)

/* 4.2 */
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#define NFSD4_2_SECURITY_ATTRS          FATTR4_WORD2_SECURITY_LABEL
#else
#define NFSD4_2_SECURITY_ATTRS          0
#endif

#ifdef CONFIG_NFSD_V4_POSIX_ACLS
#define NFSD4_2_POSIX_ACL_ATTRS \
        (FATTR4_WORD2_ACL_TRUEFORM | \
        FATTR4_WORD2_ACL_TRUEFORM_SCOPE | \
        FATTR4_WORD2_POSIX_DEFAULT_ACL | \
        FATTR4_WORD2_POSIX_ACCESS_ACL)
#else
#define NFSD4_2_POSIX_ACL_ATTRS         0
#endif

#define NFSD4_2_SUPPORTED_ATTRS_WORD2 \
        (NFSD4_1_SUPPORTED_ATTRS_WORD2 | \
        FATTR4_WORD2_MODE_UMASK | \
        FATTR4_WORD2_CLONE_BLKSIZE | \
        NFSD4_2_SECURITY_ATTRS | \
        FATTR4_WORD2_XATTR_SUPPORT | \
        FATTR4_WORD2_TIME_DELEG_ACCESS | \
        FATTR4_WORD2_TIME_DELEG_MODIFY | \
        FATTR4_WORD2_OPEN_ARGUMENTS | \
        NFSD4_2_POSIX_ACL_ATTRS)

extern const u32 nfsd_suppattrs[3][3];

static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr,
                                    struct nfs42_netaddr *netaddr)
{
        struct sockaddr_in *sin = (struct sockaddr_in *)addr;
        struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
        unsigned int port;
        size_t ret_addr, ret_port;

        switch (addr->sa_family) {
        case AF_INET:
                port = ntohs(sin->sin_port);
                sprintf(netaddr->netid, "tcp");
                netaddr->netid_len = 3;
                break;
        case AF_INET6:
                port = ntohs(sin6->sin6_port);
                sprintf(netaddr->netid, "tcp6");
                netaddr->netid_len = 4;
                break;
        default:
                return nfserr_inval;
        }
        ret_addr = rpc_ntop(addr, netaddr->addr, sizeof(netaddr->addr));
        ret_port = snprintf(netaddr->addr + ret_addr,
                            RPCBIND_MAXUADDRLEN + 1 - ret_addr,
                            ".%u.%u", port >> 8, port & 0xff);
        WARN_ON(ret_port >= RPCBIND_MAXUADDRLEN + 1 - ret_addr);
        netaddr->addr_len = ret_addr + ret_port;
        return 0;
}

static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
{
        return !((bm1[0] & ~bm2[0]) ||
                 (bm1[1] & ~bm2[1]) ||
                 (bm1[2] & ~bm2[2]));
}

static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
{
        return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
}

/* These will return ERR_INVAL if specified in GETATTR or READDIR. */
#define NFSD_WRITEONLY_ATTRS_WORD1 \
        (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)

/*
 * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add
 * a writeable attribute here without also adding code to parse it to
 * nfsd4_decode_fattr().
 */
#define NFSD_WRITEABLE_ATTRS_WORD0 \
        (FATTR4_WORD0_SIZE | FATTR4_WORD0_ACL)
#define NFSD_WRITEABLE_ATTRS_WORD1 \
        (FATTR4_WORD1_MODE | FATTR4_WORD1_OWNER | FATTR4_WORD1_OWNER_GROUP \
        | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_CREATE \
        | FATTR4_WORD1_TIME_MODIFY_SET)
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#define MAYBE_FATTR4_WORD2_SECURITY_LABEL \
        FATTR4_WORD2_SECURITY_LABEL
#else
#define MAYBE_FATTR4_WORD2_SECURITY_LABEL 0
#endif
#ifdef CONFIG_NFSD_V4_POSIX_ACLS
#define MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS \
        FATTR4_WORD2_POSIX_DEFAULT_ACL | FATTR4_WORD2_POSIX_ACCESS_ACL
#else
#define MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS 0
#endif
#define NFSD_WRITEABLE_ATTRS_WORD2 \
        (FATTR4_WORD2_MODE_UMASK \
        | MAYBE_FATTR4_WORD2_SECURITY_LABEL \
        | FATTR4_WORD2_TIME_DELEG_ACCESS \
        | FATTR4_WORD2_TIME_DELEG_MODIFY \
        | MAYBE_FATTR4_WORD2_POSIX_ACL_ATTRS \
        )

#define NFSD_SUPPATTR_EXCLCREAT_WORD0 \
        NFSD_WRITEABLE_ATTRS_WORD0
/*
 * we currently store the exclusive create verifier in the v_{a,m}time
 * attributes so the client can't set these at create time using EXCLUSIVE4_1
 */
#define NFSD_SUPPATTR_EXCLCREAT_WORD1 \
        (NFSD_WRITEABLE_ATTRS_WORD1 & \
         ~(FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_MODIFY_SET))
/*
 * The FATTR4_WORD2_TIME_DELEG attributes are not to be allowed for
 * OPEN(create) with EXCLUSIVE4_1. It doesn't make sense to set a
 * delegated timestamp on a new file.
 *
 * This mask includes NFSv4.2-only attributes (e.g., POSIX ACLs).
 * Version filtering occurs via nfsd_suppattrs[] before this mask
 * is applied, so pre-4.2 clients never see unsupported attributes.
 */
#define NFSD_SUPPATTR_EXCLCREAT_WORD2 \
        (NFSD_WRITEABLE_ATTRS_WORD2 & \
        ~(FATTR4_WORD2_TIME_DELEG_ACCESS | FATTR4_WORD2_TIME_DELEG_MODIFY))

extern int nfsd4_is_junction(struct dentry *dentry);
extern int register_cld_notifier(void);
extern void unregister_cld_notifier(void);
#ifdef CONFIG_NFSD_V4_2_INTER_SSC
extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn);
#endif

extern void nfsd4_init_leases_net(struct nfsd_net *nn);

#else /* CONFIG_NFSD_V4 */
static inline int nfsd4_is_junction(struct dentry *dentry)
{
        return 0;
}

static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { };

#define register_cld_notifier() 0
#define unregister_cld_notifier() do { } while(0)

#endif /* CONFIG_NFSD_V4 */

#endif /* LINUX_NFSD_NFSD_H */