RFC 7863
Network File System (NFS) Version 4 Minor Version 2 External Data Representation Standard (XDR) Description
Pages: 87
Proposed Standard
Proposed Standard
Part 2 of 4 – Pages 20 to 38
/// enum data_content4 {
/// NFS4_CONTENT_DATA = 0,
/// NFS4_CONTENT_HOLE = 1
/// };
///
///
///
/// enum stable_how4 {
/// UNSTABLE4 = 0,
/// DATA_SYNC4 = 1,
/// FILE_SYNC4 = 2
/// };
///
///
///
/// struct write_response4 {
/// stateid4 wr_callback_id<1>;
/// length4 wr_count;
/// stable_how4 wr_committed;
/// verifier4 wr_writeverf;
/// };
///
///
/// /*
/// * NFSv4.1 attributes
/// */
/// typedef bitmap4 fattr4_supported_attrs;
/// typedef nfs_ftype4 fattr4_type;
/// typedef uint32_t fattr4_fh_expire_type;
/// typedef changeid4 fattr4_change;
/// typedef uint64_t fattr4_size;
/// typedef bool fattr4_link_support;
/// typedef bool fattr4_symlink_support;
/// typedef bool fattr4_named_attr;
/// typedef fsid4 fattr4_fsid;
/// typedef bool fattr4_unique_handles;
/// typedef nfs_lease4 fattr4_lease_time;
/// typedef nfsstat4 fattr4_rdattr_error;
/// typedef nfsace4 fattr4_acl<>;
/// typedef uint32_t fattr4_aclsupport;
/// typedef bool fattr4_archive;
/// typedef bool fattr4_cansettime;
/// typedef bool fattr4_case_insensitive;
/// typedef bool fattr4_case_preserving;
/// typedef bool fattr4_chown_restricted;
/// typedef uint64_t fattr4_fileid;
/// typedef uint64_t fattr4_files_avail;
/// typedef nfs_fh4 fattr4_filehandle;
/// typedef uint64_t fattr4_files_free; /// typedef uint64_t fattr4_files_total; /// typedef fs_locations4 fattr4_fs_locations; /// typedef bool fattr4_hidden; /// typedef bool fattr4_homogeneous; /// typedef uint64_t fattr4_maxfilesize; /// typedef uint32_t fattr4_maxlink; /// typedef uint32_t fattr4_maxname; /// typedef uint64_t fattr4_maxread; /// typedef uint64_t fattr4_maxwrite; /// typedef ascii_REQUIRED4 fattr4_mimetype; /// typedef mode4 fattr4_mode; /// typedef mode_masked4 fattr4_mode_set_masked; /// typedef uint64_t fattr4_mounted_on_fileid; /// typedef bool fattr4_no_trunc; /// typedef uint32_t fattr4_numlinks; /// typedef utf8str_mixed fattr4_owner; /// typedef utf8str_mixed fattr4_owner_group; /// typedef uint64_t fattr4_quota_avail_hard; /// typedef uint64_t fattr4_quota_avail_soft; /// typedef uint64_t fattr4_quota_used; /// typedef specdata4 fattr4_rawdev; /// typedef uint64_t fattr4_space_avail; /// typedef length4 fattr4_space_free; /// typedef uint64_t fattr4_space_total; /// typedef uint64_t fattr4_space_used; /// typedef bool fattr4_system; /// typedef nfstime4 fattr4_time_access; /// typedef settime4 fattr4_time_access_set; /// typedef nfstime4 fattr4_time_backup; /// typedef nfstime4 fattr4_time_create; /// typedef nfstime4 fattr4_time_delta; /// typedef nfstime4 fattr4_time_metadata; /// typedef nfstime4 fattr4_time_modify; /// typedef settime4 fattr4_time_modify_set; /// /* /// * Attributes new to NFSv4.1 /// */ /// typedef bitmap4 fattr4_suppattr_exclcreat; /// typedef nfstime4 fattr4_dir_notif_delay; /// typedef nfstime4 fattr4_dirent_notif_delay; /// typedef layouttype4 fattr4_fs_layout_types<>; /// typedef fs4_status fattr4_fs_status; /// typedef fs_charset_cap4 fattr4_fs_charset_cap; /// typedef uint32_t fattr4_layout_alignment; /// typedef uint32_t fattr4_layout_blksize; /// typedef layouthint4 fattr4_layout_hint; /// typedef layouttype4 fattr4_layout_types<>;
/// typedef mdsthreshold4 fattr4_mdsthreshold; /// typedef retention_get4 fattr4_retention_get; /// typedef retention_set4 fattr4_retention_set; /// typedef retention_get4 fattr4_retentevt_get; /// typedef retention_set4 fattr4_retentevt_set; /// typedef uint64_t fattr4_retention_hold; /// typedef nfsacl41 fattr4_dacl; /// typedef nfsacl41 fattr4_sacl; /// typedef change_policy4 fattr4_change_policy; /// /* /// * Attributes new to NFSv4.2 /// */ /// typedef uint64_t fattr4_space_freed; /// typedef change_attr_type4 /// fattr4_change_attr_type; /// typedef sec_label4 fattr4_sec_label; /// typedef uint32_t fattr4_clone_blksize; /// /// %/* /// % * REQUIRED attributes /// % */ /// const FATTR4_SUPPORTED_ATTRS = 0; /// const FATTR4_TYPE = 1; /// const FATTR4_FH_EXPIRE_TYPE = 2; /// const FATTR4_CHANGE = 3; /// const FATTR4_SIZE = 4; /// const FATTR4_LINK_SUPPORT = 5; /// const FATTR4_SYMLINK_SUPPORT = 6; /// const FATTR4_NAMED_ATTR = 7; /// const FATTR4_FSID = 8; /// const FATTR4_UNIQUE_HANDLES = 9; /// const FATTR4_LEASE_TIME = 10; /// const FATTR4_RDATTR_ERROR = 11; /// const FATTR4_FILEHANDLE = 19; /// /// %/* /// % * New to NFSv4.1 /// % */ /// const FATTR4_SUPPATTR_EXCLCREAT = 75; /// /// %/* /// % * RECOMMENDED attributes /// % */ /// const FATTR4_ACL = 12; /// const FATTR4_ACLSUPPORT = 13; /// const FATTR4_ARCHIVE = 14; /// const FATTR4_CANSETTIME = 15; /// const FATTR4_CASE_INSENSITIVE = 16;
/// const FATTR4_CASE_PRESERVING = 17; /// const FATTR4_CHOWN_RESTRICTED = 18; /// const FATTR4_FILEID = 20; /// const FATTR4_FILES_AVAIL = 21; /// const FATTR4_FILES_FREE = 22; /// const FATTR4_FILES_TOTAL = 23; /// const FATTR4_FS_LOCATIONS = 24; /// const FATTR4_HIDDEN = 25; /// const FATTR4_HOMOGENEOUS = 26; /// const FATTR4_MAXFILESIZE = 27; /// const FATTR4_MAXLINK = 28; /// const FATTR4_MAXNAME = 29; /// const FATTR4_MAXREAD = 30; /// const FATTR4_MAXWRITE = 31; /// const FATTR4_MIMETYPE = 32; /// const FATTR4_MODE = 33; /// const FATTR4_NO_TRUNC = 34; /// const FATTR4_NUMLINKS = 35; /// const FATTR4_OWNER = 36; /// const FATTR4_OWNER_GROUP = 37; /// const FATTR4_QUOTA_AVAIL_HARD = 38; /// const FATTR4_QUOTA_AVAIL_SOFT = 39; /// const FATTR4_QUOTA_USED = 40; /// const FATTR4_RAWDEV = 41; /// const FATTR4_SPACE_AVAIL = 42; /// const FATTR4_SPACE_FREE = 43; /// const FATTR4_SPACE_TOTAL = 44; /// const FATTR4_SPACE_USED = 45; /// const FATTR4_SYSTEM = 46; /// const FATTR4_TIME_ACCESS = 47; /// const FATTR4_TIME_ACCESS_SET = 48; /// const FATTR4_TIME_BACKUP = 49; /// const FATTR4_TIME_CREATE = 50; /// const FATTR4_TIME_DELTA = 51; /// const FATTR4_TIME_METADATA = 52; /// const FATTR4_TIME_MODIFY = 53; /// const FATTR4_TIME_MODIFY_SET = 54; /// const FATTR4_MOUNTED_ON_FILEID = 55; /// /// %/* /// % * New to NFSv4.1 /// % */ /// const FATTR4_DIR_NOTIF_DELAY = 56; /// const FATTR4_DIRENT_NOTIF_DELAY = 57; /// const FATTR4_DACL = 58; /// const FATTR4_SACL = 59; /// const FATTR4_CHANGE_POLICY = 60; /// const FATTR4_FS_STATUS = 61;
/// const FATTR4_FS_LAYOUT_TYPES = 62;
/// const FATTR4_LAYOUT_HINT = 63;
/// const FATTR4_LAYOUT_TYPES = 64;
/// const FATTR4_LAYOUT_BLKSIZE = 65;
/// const FATTR4_LAYOUT_ALIGNMENT = 66;
/// const FATTR4_FS_LOCATIONS_INFO = 67;
/// const FATTR4_MDSTHRESHOLD = 68;
/// const FATTR4_RETENTION_GET = 69;
/// const FATTR4_RETENTION_SET = 70;
/// const FATTR4_RETENTEVT_GET = 71;
/// const FATTR4_RETENTEVT_SET = 72;
/// const FATTR4_RETENTION_HOLD = 73;
/// const FATTR4_MODE_SET_MASKED = 74;
/// const FATTR4_FS_CHARSET_CAP = 76;
///
/// %/*
/// % * New to NFSv4.2
/// % */
/// const FATTR4_CLONE_BLKSIZE = 77;
/// const FATTR4_SPACE_FREED = 78;
/// const FATTR4_CHANGE_ATTR_TYPE = 79;
/// const FATTR4_SEC_LABEL = 80;
///
/// /*
/// * File attribute container
/// */
/// struct fattr4 {
/// bitmap4 attrmask;
/// attrlist4 attr_vals;
/// };
///
/// /*
/// * Change info for the client
/// */
/// struct change_info4 {
/// bool atomic;
/// changeid4 before;
/// changeid4 after;
/// };
///
/// typedef netaddr4 clientaddr4;
///
/// /*
/// * Callback program info as provided by the client
/// */
/// struct cb_client4 {
/// uint32_t cb_program;
/// netaddr4 cb_location;
/// };
///
/// /*
/// * NFSv4.0 long-hand client ID
/// */
/// struct nfs_client_id4 {
/// verifier4 verifier;
/// opaque id<NFS4_OPAQUE_LIMIT>;
/// };
///
/// /*
/// * NFSv4.1 client owner (aka long-hand client ID)
/// */
/// struct client_owner4 {
/// verifier4 co_verifier;
/// opaque co_ownerid<NFS4_OPAQUE_LIMIT>;
/// };
///
///
/// /*
/// * NFSv4.1 server owner
/// */
/// struct server_owner4 {
/// uint64_t so_minor_id;
/// opaque so_major_id<NFS4_OPAQUE_LIMIT>;
/// };
///
///
/// struct state_owner4 {
/// clientid4 clientid;
/// opaque owner<NFS4_OPAQUE_LIMIT>;
/// };
///
/// typedef state_owner4 open_owner4;
/// typedef state_owner4 lock_owner4;
///
///
/// enum nfs_lock_type4 {
/// READ_LT = 1,
/// WRITE_LT = 2,
/// READW_LT = 3, /* Blocking read */
/// WRITEW_LT = 4 /* Blocking write */
/// };
///
///
/// %
/// %/* Input for computing subkeys */
/// enum ssv_subkey4 {
/// SSV4_SUBKEY_MIC_I2T = 1,
/// SSV4_SUBKEY_MIC_T2I = 2,
/// SSV4_SUBKEY_SEAL_I2T = 3,
/// SSV4_SUBKEY_SEAL_T2I = 4
/// };
/// %
///
/// %
/// %/* Input for computing smt_hmac */
/// struct ssv_mic_plain_tkn4 {
/// uint32_t smpt_ssv_seq;
/// opaque smpt_orig_plain<>;
/// };
/// %
///
/// %
/// %/*
/// % * Secret State Verifier Generic Security Service (SSV GSS)
/// % * PerMsgToken token
/// % */
/// struct ssv_mic_tkn4 {
/// uint32_t smt_ssv_seq;
/// opaque smt_hmac<>;
/// };
/// %
///
/// %
/// %/* Input for computing ssct_encr_data and ssct_hmac */
/// struct ssv_seal_plain_tkn4 {
/// opaque sspt_confounder<>;
/// uint32_t sspt_ssv_seq;
/// opaque sspt_orig_plain<>;
/// opaque sspt_pad<>;
/// };
/// %
///
/// %
/// %/* SSV GSS SealedMessage token */
/// struct ssv_seal_cipher_tkn4 {
/// uint32_t ssct_ssv_seq;
/// opaque ssct_iv<>;
/// opaque ssct_encr_data<>;
/// opaque ssct_hmac<>;
/// };
/// %
///
/// /*
/// * Defines an individual server replica
/// */
/// struct fs_locations_server4 {
/// int32_t fls_currency;
/// opaque fls_info<>;
/// utf8str_cis fls_server;
/// };
///
/// /*
/// * Byte indices of items within
/// * fls_info: flag fields, class numbers,
/// * bytes indicating ranks and orders
/// */
/// const FSLI4BX_GFLAGS = 0;
/// const FSLI4BX_TFLAGS = 1;
///
/// const FSLI4BX_CLSIMUL = 2;
/// const FSLI4BX_CLHANDLE = 3;
/// const FSLI4BX_CLFILEID = 4;
/// const FSLI4BX_CLWRITEVER = 5;
/// const FSLI4BX_CLCHANGE = 6;
/// const FSLI4BX_CLREADDIR = 7;
///
/// const FSLI4BX_READRANK = 8;
/// const FSLI4BX_WRITERANK = 9;
/// const FSLI4BX_READORDER = 10;
/// const FSLI4BX_WRITEORDER = 11;
///
/// /*
/// * Bits defined within the general flag byte
/// */
/// const FSLI4GF_WRITABLE = 0x01;
/// const FSLI4GF_CUR_REQ = 0x02;
/// const FSLI4GF_ABSENT = 0x04;
/// const FSLI4GF_GOING = 0x08;
/// const FSLI4GF_SPLIT = 0x10;
///
/// /*
/// * Bits defined within the transport flag byte
/// */
/// const FSLI4TF_RDMA = 0x01;
///
/// /*
/// * Defines a set of replicas sharing
/// * a common value of the root path
/// * within the corresponding
/// * single-server namespaces
/// */
/// struct fs_locations_item4 {
/// fs_locations_server4 fli_entries<>;
/// pathname4 fli_rootpath;
/// };
///
/// /*
/// * Defines the overall structure of
/// * the fs_locations_info attribute
/// */
/// struct fs_locations_info4 {
/// uint32_t fli_flags;
/// int32_t fli_valid_for;
/// pathname4 fli_fs_root;
/// fs_locations_item4 fli_items<>;
/// };
///
/// /*
/// * Flag bits in fli_flags
/// */
/// const FSLI4IF_VAR_SUB = 0x00000001;
///
/// typedef fs_locations_info4 fattr4_fs_locations_info;
///
/// const NFL4_UFLG_MASK = 0x0000003F;
/// const NFL4_UFLG_DENSE = 0x00000001;
/// const NFL4_UFLG_COMMIT_THRU_MDS = 0x00000002;
/// const NFL42_UFLG_IO_ADVISE_THRU_MDS = 0x00000004;
/// const NFL4_UFLG_STRIPE_UNIT_SIZE_MASK = 0xFFFFFFC0;
///
/// typedef uint32_t nfl_util4;
///
/// %
///
/// enum filelayout_hint_care4 {
/// NFLH4_CARE_DENSE = NFL4_UFLG_DENSE,
///
/// NFLH4_CARE_COMMIT_THRU_MDS
/// = NFL4_UFLG_COMMIT_THRU_MDS,
///
/// NFL42_CARE_IO_ADVISE_THRU_MDS
/// = NFL42_UFLG_IO_ADVISE_THRU_MDS,
///
/// NFLH4_CARE_STRIPE_UNIT_SIZE
/// = 0x00000040,
///
/// NFLH4_CARE_STRIPE_COUNT = 0x00000080
/// };
/// %
/// %/*
/// % * Encoded in the loh_body field of data type layouthint4:
/// % */
/// %
/// struct nfsv4_1_file_layouthint4 {
/// uint32_t nflh_care;
/// nfl_util4 nflh_util;
/// count4 nflh_stripe_count;
/// };
///
/// %
///
/// %
/// typedef netaddr4 multipath_list4<>;
/// %
/// %/*
/// % * Encoded in the da_addr_body field of data type device_addr4:
/// % */
/// struct nfsv4_1_file_layout_ds_addr4 {
/// uint32_t nflda_stripe_indices<>;
/// multipath_list4 nflda_multipath_ds_list<>;
/// };
///
/// %
///
/// %
/// %/*
/// % * Encoded in the loc_body field of data type layout_content4:
/// % */
/// struct nfsv4_1_file_layout4 {
/// deviceid4 nfl_deviceid;
/// nfl_util4 nfl_util;
/// uint32_t nfl_first_stripe_index;
/// offset4 nfl_pattern_offset;
/// nfs_fh4 nfl_fh_list<>;
/// };
///
/// %
///
///
/// /*
/// * Operation arrays (the opnum first)
/// */
///
/// enum nfs_opnum4 {
/// OP_ACCESS = 3,
/// OP_CLOSE = 4,
/// OP_COMMIT = 5,
/// OP_CREATE = 6,
/// OP_DELEGPURGE = 7,
/// OP_DELEGRETURN = 8,
/// OP_GETATTR = 9,
/// OP_GETFH = 10,
/// OP_LINK = 11,
/// OP_LOCK = 12,
/// OP_LOCKT = 13,
/// OP_LOCKU = 14,
/// OP_LOOKUP = 15,
/// OP_LOOKUPP = 16,
/// OP_NVERIFY = 17,
/// OP_OPEN = 18,
/// OP_OPENATTR = 19,
/// OP_OPEN_CONFIRM = 20, /* Mandatory not-to-implement */
/// OP_OPEN_DOWNGRADE = 21,
/// OP_PUTFH = 22,
/// OP_PUTPUBFH = 23,
/// OP_PUTROOTFH = 24,
/// OP_READ = 25,
/// OP_READDIR = 26,
/// OP_READLINK = 27,
/// OP_REMOVE = 28,
/// OP_RENAME = 29,
/// OP_RENEW = 30, /* Mandatory not-to-implement */
/// OP_RESTOREFH = 31, /// OP_SAVEFH = 32, /// OP_SECINFO = 33, /// OP_SETATTR = 34, /// OP_SETCLIENTID = 35, /* Mandatory not-to-implement */ /// OP_SETCLIENTID_CONFIRM = 36, /* Mandatory not-to-implement */ /// OP_VERIFY = 37, /// OP_WRITE = 38, /// OP_RELEASE_LOCKOWNER = 39, /* Mandatory not-to-implement */ /// % /// %/* New operations for NFSv4.1 */ /// % /// OP_BACKCHANNEL_CTL = 40, /// OP_BIND_CONN_TO_SESSION = 41, /// OP_EXCHANGE_ID = 42, /// OP_CREATE_SESSION = 43, /// OP_DESTROY_SESSION = 44, /// OP_FREE_STATEID = 45, /// OP_GET_DIR_DELEGATION = 46, /// OP_GETDEVICEINFO = 47, /// OP_GETDEVICELIST = 48, /// OP_LAYOUTCOMMIT = 49, /// OP_LAYOUTGET = 50, /// OP_LAYOUTRETURN = 51, /// OP_SECINFO_NO_NAME = 52, /// OP_SEQUENCE = 53, /// OP_SET_SSV = 54, /// OP_TEST_STATEID = 55, /// OP_WANT_DELEGATION = 56, /// OP_DESTROY_CLIENTID = 57, /// OP_RECLAIM_COMPLETE = 58, /// %
/// %/* New operations for NFSv4.2 */
/// %
/// OP_ALLOCATE = 59,
/// OP_COPY = 60,
/// OP_COPY_NOTIFY = 61,
/// OP_DEALLOCATE = 62,
/// OP_IO_ADVISE = 63,
/// OP_LAYOUTERROR = 64,
/// OP_LAYOUTSTATS = 65,
/// OP_OFFLOAD_CANCEL = 66,
/// OP_OFFLOAD_STATUS = 67,
/// OP_READ_PLUS = 68,
/// OP_SEEK = 69,
/// OP_WRITE_SAME = 70,
/// OP_CLONE = 71,
/// OP_ILLEGAL = 10044
/// };
///
///
///
/// const ACCESS4_READ = 0x00000001;
/// const ACCESS4_LOOKUP = 0x00000002;
/// const ACCESS4_MODIFY = 0x00000004;
/// const ACCESS4_EXTEND = 0x00000008;
/// const ACCESS4_DELETE = 0x00000010;
/// const ACCESS4_EXECUTE = 0x00000020;
///
/// struct ACCESS4args {
/// /* CURRENT_FH: object */
/// uint32_t access;
/// };
///
/// struct ACCESS4resok {
/// uint32_t supported;
/// uint32_t access;
/// };
///
/// union ACCESS4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// ACCESS4resok resok4;
/// default:
/// void;
/// };
///
/// struct CLONE4args {
/// /* SAVED_FH: source file */
/// /* CURRENT_FH: destination file */
/// stateid4 cl_src_stateid;
/// stateid4 cl_dst_stateid;
/// offset4 cl_src_offset;
/// offset4 cl_dst_offset;
/// length4 cl_count;
/// };
///
/// struct CLONE4res {
/// nfsstat4 cl_status;
/// };
/// struct CLOSE4args {
/// /* CURRENT_FH: object */
/// seqid4 seqid;
/// stateid4 open_stateid;
/// };
///
/// union CLOSE4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// stateid4 open_stateid;
/// default:
/// void;
/// };
///
/// struct COMMIT4args {
/// /* CURRENT_FH: file */
/// offset4 offset;
/// count4 count;
/// };
///
/// struct COMMIT4resok {
/// verifier4 writeverf;
/// };
///
/// union COMMIT4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// COMMIT4resok resok4;
/// default:
/// void;
/// };
///
/// union createtype4 switch (nfs_ftype4 type) {
/// case NF4LNK:
/// linktext4 linkdata;
/// case NF4BLK:
/// case NF4CHR:
/// specdata4 devdata;
/// case NF4SOCK:
/// case NF4FIFO:
/// case NF4DIR:
/// void;
/// default:
/// void; /* Server should return NFS4ERR_BADTYPE. */
/// };
///
/// struct CREATE4args {
/// /* CURRENT_FH: directory for creation */
/// createtype4 objtype;
/// component4 objname;
/// fattr4 createattrs;
/// };
///
/// struct CREATE4resok {
/// change_info4 cinfo;
/// bitmap4 attrset; /* Attributes set */
/// };
///
/// union CREATE4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// /* New CURRENTFH: created object */
/// CREATE4resok resok4;
/// default:
/// void;
/// };
///
/// struct DELEGPURGE4args {
/// clientid4 clientid;
/// };
///
/// struct DELEGPURGE4res {
/// nfsstat4 status;
/// };
///
/// struct DELEGRETURN4args {
/// /* CURRENT_FH: delegated object */
/// stateid4 deleg_stateid;
/// };
///
/// struct DELEGRETURN4res {
/// nfsstat4 status;
/// };
///
/// struct GETATTR4args {
/// /* CURRENT_FH: object */
/// bitmap4 attr_request;
/// };
///
/// struct GETATTR4resok {
/// fattr4 obj_attributes;
/// };
///
/// union GETATTR4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// GETATTR4resok resok4;
/// default:
/// void;
/// };
///
/// struct GETFH4resok {
/// nfs_fh4 object;
/// };
///
/// union GETFH4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// GETFH4resok resok4;
/// default:
/// void;
/// };
///
/// struct LINK4args {
/// /* SAVED_FH: source object */
/// /* CURRENT_FH: target directory */
/// component4 newname;
/// };
///
/// struct LINK4resok {
/// change_info4 cinfo;
/// };
///
/// union LINK4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// LINK4resok resok4;
/// default:
/// void;
/// };
///
/// /*
/// * For LOCK, transition from open_stateid and lock_owner
/// * to a lock stateid.
/// */
/// struct open_to_lock_owner4 {
/// seqid4 open_seqid;
/// stateid4 open_stateid;
/// seqid4 lock_seqid;
/// lock_owner4 lock_owner;
/// };
///
/// /*
/// * For LOCK, existing lock stateid continues to request new
/// * file lock for the same lock_owner and open_stateid.
/// */
/// struct exist_lock_owner4 {
/// stateid4 lock_stateid;
/// seqid4 lock_seqid;
/// };
///
/// union locker4 switch (bool new_lock_owner) {
/// case TRUE:
/// open_to_lock_owner4 open_owner;
/// case FALSE:
/// exist_lock_owner4 lock_owner;
/// };
///
/// /*
/// * LOCK/LOCKT/LOCKU: Record lock management
/// */
/// struct LOCK4args {
/// /* CURRENT_FH: file */
/// nfs_lock_type4 locktype;
/// bool reclaim;
/// offset4 offset;
/// length4 length;
/// locker4 locker;
/// };
///
/// struct LOCK4denied {
/// offset4 offset;
/// length4 length;
/// nfs_lock_type4 locktype;
/// lock_owner4 owner;
/// };
///
/// struct LOCK4resok {
/// stateid4 lock_stateid;
/// };
///
/// union LOCK4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// LOCK4resok resok4;
/// case NFS4ERR_DENIED:
/// LOCK4denied denied;
/// default:
/// void;
/// };
///
/// struct LOCKT4args {
/// /* CURRENT_FH: file */
/// nfs_lock_type4 locktype;
/// offset4 offset;
/// length4 length;
/// lock_owner4 owner;
/// };
///
/// union LOCKT4res switch (nfsstat4 status) {
/// case NFS4ERR_DENIED:
/// LOCK4denied denied;
/// case NFS4_OK:
/// void;
/// default:
/// void;
/// };
///
/// struct LOCKU4args {
/// /* CURRENT_FH: file */
/// nfs_lock_type4 locktype;
/// seqid4 seqid;
/// stateid4 lock_stateid;
/// offset4 offset;
/// length4 length;
/// };
///
/// union LOCKU4res switch (nfsstat4 status) {
/// case NFS4_OK:
/// stateid4 lock_stateid;
/// default:
/// void;
/// };
///
/// struct LOOKUP4args {
/// /* CURRENT_FH: directory */
/// component4 objname;
/// };
///
/// struct LOOKUP4res {
/// /* New CURRENT_FH: object */
/// nfsstat4 status;
/// };
///
/// struct LOOKUPP4res {
/// /* New CURRENT_FH: parent directory */
/// nfsstat4 status;
/// };
///
/// struct NVERIFY4args {
/// /* CURRENT_FH: object */
/// fattr4 obj_attributes;
/// };
///
/// struct NVERIFY4res {
/// nfsstat4 status;
/// };
///
/// /*
/// * Various definitions for OPEN
/// */
/// enum createmode4 {
/// UNCHECKED4 = 0,
/// GUARDED4 = 1,
/// /* Deprecated in NFSv4.1 */
/// EXCLUSIVE4 = 2,
/// /*
/// * New to NFSv4.1. If session is persistent,
/// * GUARDED4 MUST be used. Otherwise, use
/// * EXCLUSIVE4_1 instead of EXCLUSIVE4.
/// */
/// EXCLUSIVE4_1 = 3
/// };
///
/// struct creatverfattr {
/// verifier4 cva_verf;
/// fattr4 cva_attrs;
/// };
///
(next page on part 3)