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47b994049f
Clang's static analyzer complains that nvs_xdr() and nvs_native() functions return pointers to stack memory. That is technically true, but the pointers are stored in stack memory from the caller's stack frame, are not read by the caller and are deallocated when the caller returns, so this is harmless. We set the pointers to NULL to silence the warnings. Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu> Closes #14612
154 lines
3.9 KiB
C
154 lines
3.9 KiB
C
/*
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* Copyright (c) 2008 Sun Microsystems, Inc.
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* Written by Ricardo Correia <Ricardo.M.Correia@Sun.COM>
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*
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* This file is part of the SPL, Solaris Porting Layer.
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*
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* The SPL is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* The SPL is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with the SPL. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _SPL_RPC_XDR_H
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#define _SPL_RPC_XDR_H
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#include <sys/types.h>
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typedef int bool_t;
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/*
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* XDR enums and types.
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*/
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enum xdr_op {
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XDR_ENCODE,
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XDR_DECODE
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};
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struct xdr_ops;
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typedef struct {
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const struct xdr_ops *x_ops;
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/* Let caller know xdrmem_create() succeeds */
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caddr_t x_addr; /* Current buffer addr */
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caddr_t x_addr_end; /* End of the buffer */
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enum xdr_op x_op; /* Stream direction */
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} XDR;
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typedef bool_t (*xdrproc_t)(XDR *xdrs, void *ptr);
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struct xdr_ops {
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bool_t (*xdr_control)(XDR *, int, void *);
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bool_t (*xdr_char)(XDR *, char *);
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bool_t (*xdr_u_short)(XDR *, unsigned short *);
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bool_t (*xdr_u_int)(XDR *, unsigned *);
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bool_t (*xdr_u_longlong_t)(XDR *, u_longlong_t *);
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bool_t (*xdr_opaque)(XDR *, caddr_t, const uint_t);
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bool_t (*xdr_string)(XDR *, char **, const uint_t);
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bool_t (*xdr_array)(XDR *, caddr_t *, uint_t *, const uint_t,
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const uint_t, const xdrproc_t);
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};
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/*
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* XDR control operator.
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*/
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#define XDR_GET_BYTES_AVAIL 1
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struct xdr_bytesrec {
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bool_t xc_is_last_record;
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size_t xc_num_avail;
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};
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/*
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* XDR functions.
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*/
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void xdrmem_create(XDR *xdrs, const caddr_t addr, const uint_t size,
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const enum xdr_op op);
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#define xdr_control(xdrs, req, info) \
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(xdrs)->x_ops->xdr_control((xdrs), (req), (info))
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/*
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* For precaution, the following are defined as static inlines instead of macros
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* to get some amount of type safety.
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*
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* Also, macros wouldn't work in the case where typecasting is done, because it
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* must be possible to reference the functions' addresses by these names.
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*/
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static inline bool_t xdr_char(XDR *xdrs, char *cp)
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{
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return (xdrs->x_ops->xdr_char(xdrs, cp));
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}
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static inline bool_t xdr_u_short(XDR *xdrs, unsigned short *usp)
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{
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return (xdrs->x_ops->xdr_u_short(xdrs, usp));
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}
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static inline bool_t xdr_short(XDR *xdrs, short *sp)
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{
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BUILD_BUG_ON(sizeof (short) != 2);
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return (xdrs->x_ops->xdr_u_short(xdrs, (unsigned short *) sp));
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}
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static inline bool_t xdr_u_int(XDR *xdrs, unsigned *up)
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{
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return (xdrs->x_ops->xdr_u_int(xdrs, up));
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}
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static inline bool_t xdr_int(XDR *xdrs, int *ip)
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{
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BUILD_BUG_ON(sizeof (int) != 4);
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return (xdrs->x_ops->xdr_u_int(xdrs, (unsigned *)ip));
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}
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static inline bool_t xdr_u_longlong_t(XDR *xdrs, u_longlong_t *ullp)
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{
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return (xdrs->x_ops->xdr_u_longlong_t(xdrs, ullp));
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}
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static inline bool_t xdr_longlong_t(XDR *xdrs, longlong_t *llp)
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{
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BUILD_BUG_ON(sizeof (longlong_t) != 8);
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return (xdrs->x_ops->xdr_u_longlong_t(xdrs, (u_longlong_t *)llp));
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}
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/*
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* Fixed-length opaque data.
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*/
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static inline bool_t xdr_opaque(XDR *xdrs, caddr_t cp, const uint_t cnt)
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{
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return (xdrs->x_ops->xdr_opaque(xdrs, cp, cnt));
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}
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/*
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* Variable-length string.
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* The *sp buffer must have (maxsize + 1) bytes.
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*/
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static inline bool_t xdr_string(XDR *xdrs, char **sp, const uint_t maxsize)
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{
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return (xdrs->x_ops->xdr_string(xdrs, sp, maxsize));
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}
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/*
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* Variable-length arrays.
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*/
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static inline bool_t xdr_array(XDR *xdrs, caddr_t *arrp, uint_t *sizep,
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const uint_t maxsize, const uint_t elsize, const xdrproc_t elproc)
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{
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return xdrs->x_ops->xdr_array(xdrs, arrp, sizep, maxsize, elsize,
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elproc);
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}
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#endif /* SPL_RPC_XDR_H */
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