0 +l4( (  fB- y_I|+?/* SPDX-License-Identifier: GPL-2.0 */ /* * XDR standard data types and function declarations * * Copyright (C) 1995-1997 Olaf Kirch * * Based on: * RFC 4506 "XDR: External Data Representation Standard", May 2006 */ #ifndef _SUNRPC_XDR_H_ #define _SUNRPC_XDR_H_ #include #include #include #include struct bio_vec; struct rpc_rqst; /* * Size of an XDR encoding unit in bytes, i.e. 32 bits, * as defined in Section 3 of RFC 4506. All encoded * XDR data items are aligned on a boundary of 32 bits. */ #define XDR_UNIT sizeof(__be32) /* * Buffer adjustment */ #define XDR_QUADLEN(l) (((l) + 3) >> 2) /* * Generic opaque `network object.' */ #define XDR_MAX_NETOBJ 1024 struct xdr_netobj { unsigned int len; u8 * data; }; /* * Basic structure for transmission/reception of a client XDR message. * Features a header (for a linear buffer containing RPC headers * and the data payload for short messages), and then an array of * pages. * The tail iovec allows you to append data after the page array. Its * main interest is for appending padding to the pages in order to * satisfy the int_32-alignment requirements in RFC1832. * * For the future, we might want to string several of these together * in a list if anybody wants to make use of NFSv4 COMPOUND * operations and/or has a need for scatter/gather involving pages. */ struct xdr_buf { struct kvec head[1], /* RPC header + non-page data */ tail[1]; /* Appended after page data */ struct bio_vec *bvec; struct page ** pages; /* Array of pages */ unsigned int page_base, /* Start of page data */ page_len, /* Length of page data */ flags; /* Flags for data disposition */ #define XDRBUF_READ 0x01 /* target of file read */ #define XDRBUF_WRITE 0x02 /* source of file write */ #define XDRBUF_SPARSE_PAGES 0x04 /* Page array is sparse */ unsigned int buflen, /* Total length of storage buffer */ len; /* Length of XDR encoded message */ }; static inline void xdr_buf_init(struct xdr_buf *buf, void *start, size_t len) { buf->head[0].iov_base = start; buf->head[0].iov_len = len; buf->tail[0].iov_len = 0; buf->pages = NULL; buf->page_len = 0; buf->flags = 0; buf->len = 0; buf->buflen = len; } /* * pre-xdr'ed macros. */ #define xdr_zero cpu_to_be32(0) #define xdr_one cpu_to_be32(1) #define xdr_two cpu_to_be32(2) #define rpc_auth_null cpu_to_be32(RPC_AUTH_NULL) #define rpc_auth_unix cpu_to_be32(RPC_AUTH_UNIX) #define rpc_auth_short cpu_to_be32(RPC_AUTH_SHORT) #define rpc_auth_gss cpu_to_be32(RPC_AUTH_GSS) #define rpc_auth_tls cpu_to_be32(RPC_AUTH_TLS) #define rpc_call cpu_to_be32(RPC_CALL) #define rpc_reply cpu_to_be32(RPC_REPLY) #define rpc_msg_accepted cpu_to_be32(RPC_MSG_ACCEPTED) #define rpc_success cpu_to_be32(RPC_SUCCESS) #define rpc_prog_unavail cpu_to_be32(RPC_PROG_UNAVAIL) #define rpc_prog_mismatch cpu_to_be32(RPC_PROG_MISMATCH) #define rpc_proc_unavail cpu_to_be32(RPC_PROC_UNAVAIL) #define rpc_garbage_args cpu_to_be32(RPC_GARBAGE_ARGS) #define rpc_system_err cpu_to_be32(RPC_SYSTEM_ERR) #define rpc_drop_reply cpu_to_be32(RPC_DROP_REPLY) #define rpc_mismatch cpu_to_be32(RPC_MISMATCH) #define rpc_auth_error cpu_to_be32(RPC_AUTH_ERROR) #define rpc_auth_ok cpu_to_be32(RPC_AUTH_OK) #define rpc_autherr_badcred cpu_to_be32(RPC_AUTH_BADCRED) #define rpc_autherr_rejectedcred cpu_to_be32(RPC_AUTH_REJECTEDCRED) #define rpc_autherr_badverf cpu_to_be32(RPC_AUTH_BADVERF) #define rpc_autherr_rejectedverf cpu_to_be32(RPC_AUTH_REJECTEDVERF) #define rpc_autherr_tooweak cpu_to_be32(RPC_AUTH_TOOWEAK) #define rpcsec_gsserr_credproblem cpu_to_be32(RPCSEC_GSS_CREDPROBLEM) #define rpcsec_gsserr_ctxproblem cpu_to_be32(RPCSEC_GSS_CTXPROBLEM) /* * Miscellaneous XDR helper functions */ __be32 *xdr_encode_opaque_fixed(__be32 *p, const void *ptr, unsigned int len); __be32 *xdr_encode_opaque(__be32 *p, const void *ptr, unsigned int len); __be32 *xdr_encode_string(__be32 *p, const cha