From d99a015343425a1c856c900aa8223016400ac2dc Mon Sep 17 00:00:00 2001 From: Chris Williamson Date: Thu, 8 Feb 2018 09:16:23 -0700 Subject: OpenZFS 7431 - ZFS Channel Programs Authored by: Chris Williamson Reviewed by: Matthew Ahrens Reviewed by: George Wilson Reviewed by: John Kennedy Reviewed by: Dan Kimmel Approved by: Garrett D'Amore Ported-by: Don Brady Ported-by: John Kennedy OpenZFS-issue: https://www.illumos.org/issues/7431 OpenZFS-commit: https://github.com/openzfs/openzfs/commit/dfc11533 Porting Notes: * The CLI long option arguments for '-t' and '-m' don't parse on linux * Switched from kmem_alloc to vmem_alloc in zcp_lua_alloc * Lua implementation is built as its own module (zlua.ko) * Lua headers consumed directly by zfs code moved to 'include/sys/lua/' * There is no native setjmp/longjump available in stock Linux kernel. Brought over implementations from illumos and FreeBSD * The get_temporary_prop() was adapted due to VFS platform differences * Use of inline functions in lua parser to reduce stack usage per C call * Skip some ZFS Test Suite ZCP tests on sparc64 to avoid stack overflow --- module/lua/lmem.h | 56 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 module/lua/lmem.h (limited to 'module/lua/lmem.h') diff --git a/module/lua/lmem.h b/module/lua/lmem.h new file mode 100644 index 000000000..22c04c98c --- /dev/null +++ b/module/lua/lmem.h @@ -0,0 +1,56 @@ +/* BEGIN CSTYLED */ +/* +** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $ +** Interface to Memory Manager +** See Copyright Notice in lua.h +*/ + +#ifndef lmem_h +#define lmem_h + + +#include "llimits.h" +#include + + +/* +** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is +** always constant. +** The macro is somewhat complex to avoid warnings: +** +1 avoids warnings of "comparison has constant result"; +** cast to 'void' avoids warnings of "value unused". +*/ +#define luaM_reallocv(L,b,on,n,e) \ + (cast(void, \ + (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \ + luaM_realloc_(L, (b), (on)*(e), (n)*(e))) + +#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0) +#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0) +#define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0])) + +#define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s)) +#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t))) +#define luaM_newvector(L,n,t) \ + cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) + +#define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s)) + +#define luaM_growvector(L,v,nelems,size,t,limit,e) \ + if ((nelems)+1 > (size)) \ + ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) + +#define luaM_reallocvector(L, v,oldn,n,t) \ + ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) + +LUAI_FUNC l_noret luaM_toobig (lua_State *L); + +/* not to be called directly */ +LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize, + size_t size); +LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size, + size_t size_elem, int limit, + const char *what); + +#endif +/* END CSTYLED */ -- cgit v1.2.3