7431 ZFS Channel Programs

Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

1 files changed, 173 insertions, 0 deletions

diff --git a/usr/src/uts/common/fs/zfs/lua/ldump.c b/usr/src/uts/common/fs/zfs/lua/ldump.c
new file mode 100644
index 0000000000..64e5649332
--- /dev/null
+++ b/usr/src/uts/common/fs/zfs/lua/ldump.c
@@ -0,0 +1,173 @@
+/*
+** $Id: ldump.c,v 2.17.1.1 2013/04/12 18:48:47 roberto Exp $
+** save precompiled Lua chunks
+** See Copyright Notice in lua.h
+*/
+
+#include <sys/zfs_context.h>
+
+#define ldump_c
+#define LUA_CORE
+
+#include "lua.h"
+
+#include "lobject.h"
+#include "lstate.h"
+#include "lundump.h"
+
+typedef struct {
+ lua_State* L;
+ lua_Writer writer;
+ void* data;
+ int strip;
+ int status;
+} DumpState;
+
+#define DumpMem(b,n,size,D)	DumpBlock(b,(n)*(size),D)
+#define DumpVar(x,D)		DumpMem(&x,1,sizeof(x),D)
+
+static void DumpBlock(const void* b, size_t size, DumpState* D)
+{
+ if (D->status==0)
+ {
+  lua_unlock(D->L);
+  D->status=(*D->writer)(D->L,b,size,D->data);
+  lua_lock(D->L);
+ }
+}
+
+static void DumpChar(int y, DumpState* D)
+{
+ char x=(char)y;
+ DumpVar(x,D);
+}
+
+static void DumpInt(int x, DumpState* D)
+{
+ DumpVar(x,D);
+}
+
+static void DumpNumber(lua_Number x, DumpState* D)
+{
+ DumpVar(x,D);
+}
+
+static void DumpVector(const void* b, int n, size_t size, DumpState* D)
+{
+ DumpInt(n,D);
+ DumpMem(b,n,size,D);
+}
+
+static void DumpString(const TString* s, DumpState* D)
+{
+ if (s==NULL)
+ {
+  size_t size=0;
+  DumpVar(size,D);
+ }
+ else
+ {
+  size_t size=s->tsv.len+1;		/* include trailing '\0' */
+  DumpVar(size,D);
+  DumpBlock(getstr(s),size*sizeof(char),D);
+ }
+}
+
+#define DumpCode(f,D)	 DumpVector(f->code,f->sizecode,sizeof(Instruction),D)
+
+static void DumpFunction(const Proto* f, DumpState* D);
+
+static void DumpConstants(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizek;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  const TValue* o=&f->k[i];
+  DumpChar(ttypenv(o),D);
+  switch (ttypenv(o))
+  {
+   case LUA_TNIL:
+	break;
+   case LUA_TBOOLEAN:
+	DumpChar(bvalue(o),D);
+	break;
+   case LUA_TNUMBER:
+	DumpNumber(nvalue(o),D);
+	break;
+   case LUA_TSTRING:
+	DumpString(rawtsvalue(o),D);
+	break;
+    default: lua_assert(0);
+  }
+ }
+ n=f->sizep;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpFunction(f->p[i],D);
+}
+
+static void DumpUpvalues(const Proto* f, DumpState* D)
+{
+ int i,n=f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  DumpChar(f->upvalues[i].instack,D);
+  DumpChar(f->upvalues[i].idx,D);
+ }
+}
+
+static void DumpDebug(const Proto* f, DumpState* D)
+{
+ int i,n;
+ DumpString((D->strip) ? NULL : f->source,D);
+ n= (D->strip) ? 0 : f->sizelineinfo;
+ DumpVector(f->lineinfo,n,sizeof(int),D);
+ n= (D->strip) ? 0 : f->sizelocvars;
+ DumpInt(n,D);
+ for (i=0; i<n; i++)
+ {
+  DumpString(f->locvars[i].varname,D);
+  DumpInt(f->locvars[i].startpc,D);
+  DumpInt(f->locvars[i].endpc,D);
+ }
+ n= (D->strip) ? 0 : f->sizeupvalues;
+ DumpInt(n,D);
+ for (i=0; i<n; i++) DumpString(f->upvalues[i].name,D);
+}
+
+static void DumpFunction(const Proto* f, DumpState* D)
+{
+ DumpInt(f->linedefined,D);
+ DumpInt(f->lastlinedefined,D);
+ DumpChar(f->numparams,D);
+ DumpChar(f->is_vararg,D);
+ DumpChar(f->maxstacksize,D);
+ DumpCode(f,D);
+ DumpConstants(f,D);
+ DumpUpvalues(f,D);
+ DumpDebug(f,D);
+}
+
+static void DumpHeader(DumpState* D)
+{
+ lu_byte h[LUAC_HEADERSIZE];
+ luaU_header(h);
+ DumpBlock(h,LUAC_HEADERSIZE,D);
+}
+
+/*
+** dump Lua function as precompiled chunk
+*/
+int luaU_dump (lua_State* L, const Proto* f, lua_Writer w, void* data, int strip)
+{
+ DumpState D;
+ D.L=L;
+ D.writer=w;
+ D.data=data;
+ D.strip=strip;
+ D.status=0;
+ DumpHeader(&D);
+ DumpFunction(f,&D);
+ return D.status;
+}