http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/linux/sunrpc/xdr.h

/* * include/linux/sunrpc/xdr.h * * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #ifndef _SUNRPC_XDR_H_ #define _SUNRPC_XDR_H_ #ifdef __KERNEL__ #include <linux/uio.h> #include <asm/byteorder.h> /* * Buffer adjustment */ #define XDR_QUADLEN(l) (((l) + 3) >> 2) /* * Generic opaque `network object.' At the kernel level, this type * is used only by lockd. */ #define XDR_MAX_NETOBJ 1024 struct xdr_netobj { unsigned int len; u8 * data; }; /* * This is the generic XDR function. rqstp is either a rpc_rqst (client * side) or svc_rqst pointer (server side). * Encode functions always assume there's enough room in the buffer. */ typedef int (*kxdrproc_t)(void *rqstp, u32 *data, void *obj); /* * 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 page ** pages; /* Array of contiguous pages */ unsigned int page_base, /* Start of page data */ page_len; /* Length of page data */ unsigned int buflen, /* Total length of storage buffer */ len; /* Length of XDR encoded message */ }; /* * pre-xdr'ed macros. */ #define xdr_zero __constant_htonl(0) #define xdr_one __constant_htonl(1) #define xdr_two __constant_htonl(2) #define rpc_success __constant_htonl(RPC_SUCCESS) #define rpc_prog_unavail __constant_htonl(RPC_PROG_UNAVAIL) #define rpc_prog_mismatch __constant_htonl(RPC_PROG_MISMATCH) #define rpc_proc_unavail __constant_htonl(RPC_PROC_UNAVAIL) #define rpc_garbage_args __constant_htonl(RPC_GARBAGE_ARGS) #define rpc_system_err __constant_htonl(RPC_SYSTEM_ERR) #define rpc_auth_ok __constant_htonl(RPC_AUTH_OK) #define rpc_autherr_badcred __constant_htonl(RPC_AUTH_BADCRED) #define rpc_autherr_rejectedcred __constant_htonl(RPC_AUTH_REJECTEDCRED) #define rpc_autherr_badverf __constant_htonl(RPC_AUTH_BADVERF) #define rpc_autherr_rejectedverf __constant_htonl(RPC_AUTH_REJECTEDVERF) #define rpc_autherr_tooweak __constant_htonl(RPC_AUTH_TOOWEAK) #define rpcsec_gsserr_credproblem __constant_htonl(RPCSEC_GSS_CREDPROBLEM) #define rpcsec_gsserr_ctxproblem __constant_htonl(RPCSEC_GSS_CTXPROBLEM) #define rpc_autherr_oldseqnum __constant_htonl(101) /* * Miscellaneous XDR helper functions */ u32 * xdr_encode_opaque_fixed(u32 *p, const void *ptr, unsigned int len); u32 * xdr_encode_opaque(u32 *p, const void *ptr, unsigned int len); u32 * xdr_encode_string(u32 *p, const char *s); u32 * xdr_decode_string_inplace(u32 *p, char **sp, int *lenp, int maxlen); u32 * xdr_encode_netobj(u32 *p, const struct xdr_netobj *); u32 * xdr_decode_netobj(u32 *p, struct xdr_netobj *); void xdr_encode_pages(struct xdr_buf *, struct page **, unsigned int, unsigned int); void xdr_inline_pages(struct xdr_buf *, unsigned int, struct page **, unsigned int, unsigned int); static inline u32 *xdr_encode_array(u32 *p, const void *s, unsigned int len) { return xdr_encode_opaque(p, s, len); } /* * Decode 64bit quantities (NFSv3 support) */ static inline u32 * xdr_encode_hyper(u32 *p, __u64 val) { *p++ = htonl(val >> 32); *p++ = htonl(val & 0xFFFFFFFF); return p; } static inline u32 * xdr_decode_hyper(u32 *p, __u64 *valp) { *valp = ((__u64) ntohl(*p++)) << 32; *valp |= ntohl(*p++); return p; } /* * Adjust kvec to reflect end of xdr'ed data (RPC client XDR) */ static inline int xdr_adjust_iovec(struct kvec *iov, u32 *p) { return iov->iov_len = ((u8 *) p - (u8 *) iov->iov_base); } /* * XDR buffer helper functions */ extern void xdr_shift_buf(struct xdr_buf *, size_t); extern void xdr_buf_from_iov(struct kvec *, struct xdr_buf *); extern int xdr_buf_subsegment(struct xdr_buf *, struct xdr_buf *, int, int); extern int xdr_buf_read_netobj(struct xdr_buf *, struct xdr_netobj *, int); extern int read_bytes_from_xdr_buf(struct xdr_buf *, int, void *, int); extern int write_bytes_to_xdr_buf(struct xdr_buf *, int, void *, int); /* * Helper structure for copying from an sk_buff. */ typedef struct { struct sk_buff *skb; unsigned int offset; size_t count; unsigned int csum; } skb_reader_t; typedef size_t (*skb_read_actor_t)(skb_reader_t *desc, void *to, size_t len); extern int csum_partial_copy_to_xdr(struct xdr_buf *, struct sk_buff *); extern ssize_t xdr_partial_copy_from_skb(struct xdr_buf *, unsigned int, skb_reader_t *, skb_read_actor_t); extern int xdr_encode_word(struct xdr_buf *, int, u32); extern int xdr_decode_word(struct xdr_buf *, int, u32 *); struct xdr_array2_desc; typedef int (*xdr_xcode_elem_t)(struct xdr_array2_desc *desc, void *elem); struct xdr_array2_desc { unsigned int elem_size; unsigned int array_len; unsigned int array_maxlen; xdr_xcode_elem_t xcode; }; extern int xdr_decode_array2(struct xdr_buf *buf, unsigned int base, struct xdr_array2_desc *desc); extern int xdr_encode_array2(struct xdr_buf *buf, unsigned int base, struct xdr_array2_desc *desc); /* * Provide some simple tools for XDR buffer overflow-checking etc. */ struct xdr_stream { uint32_t *p; /* start of available buffer */ struct xdr_buf *buf; /* XDR buffer to read/write */ uint32_t *end; /* end of available buffer space */ struct kvec *iov; /* pointer to the current kvec */ }; extern void xdr_init_encode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p); extern uint32_t *xdr_reserve_space(struct xdr_stream *xdr, size_t nbytes); extern void xdr_write_pages(struct xdr_stream *xdr, struct page **pages, unsigned int base, unsigned int len); extern void xdr_init_decode(struct xdr_stream *xdr, struct xdr_buf *buf, uint32_t *p); extern uint32_t *xdr_inline_decode(struct xdr_stream *xdr, size_t nbytes); extern void xdr_read_pages(struct xdr_stream *xdr, unsigned int len); #endif /* __KERNEL__ */ #endif /* _SUNRPC_XDR_H_ */