mirror of
https://git.proxmox.com/git/mirror_zfs.git
synced 2024-12-27 19:39:35 +03:00
d99a015343
Authored by: Chris Williamson <chris.williamson@delphix.com> 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> Ported-by: Don Brady <don.brady@delphix.com> Ported-by: John Kennedy <john.kennedy@delphix.com> 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
75 lines
1.6 KiB
C
75 lines
1.6 KiB
C
/* BEGIN CSTYLED */
|
|
/*
|
|
** $Id: lzio.c,v 1.35.1.1 2013/04/12 18:48:47 roberto Exp $
|
|
** Buffered streams
|
|
** See Copyright Notice in lua.h
|
|
*/
|
|
|
|
|
|
#define lzio_c
|
|
#define LUA_CORE
|
|
|
|
#include <sys/lua/lua.h>
|
|
|
|
#include "llimits.h"
|
|
#include "lmem.h"
|
|
#include "lstate.h"
|
|
#include "lzio.h"
|
|
|
|
|
|
int luaZ_fill (ZIO *z) {
|
|
size_t size;
|
|
lua_State *L = z->L;
|
|
const char *buff;
|
|
lua_unlock(L);
|
|
buff = z->reader(L, z->data, &size);
|
|
lua_lock(L);
|
|
if (buff == NULL || size == 0)
|
|
return EOZ;
|
|
z->n = size - 1; /* discount char being returned */
|
|
z->p = buff;
|
|
return cast_uchar(*(z->p++));
|
|
}
|
|
|
|
|
|
void luaZ_init (lua_State *L, ZIO *z, lua_Reader reader, void *data) {
|
|
z->L = L;
|
|
z->reader = reader;
|
|
z->data = data;
|
|
z->n = 0;
|
|
z->p = NULL;
|
|
}
|
|
|
|
|
|
/* --------------------------------------------------------------- read --- */
|
|
size_t luaZ_read (ZIO *z, void *b, size_t n) {
|
|
while (n) {
|
|
size_t m;
|
|
if (z->n == 0) { /* no bytes in buffer? */
|
|
if (luaZ_fill(z) == EOZ) /* try to read more */
|
|
return n; /* no more input; return number of missing bytes */
|
|
else {
|
|
z->n++; /* luaZ_fill consumed first byte; put it back */
|
|
z->p--;
|
|
}
|
|
}
|
|
m = (n <= z->n) ? n : z->n; /* min. between n and z->n */
|
|
memcpy(b, z->p, m);
|
|
z->n -= m;
|
|
z->p += m;
|
|
b = (char *)b + m;
|
|
n -= m;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------ */
|
|
char *luaZ_openspace (lua_State *L, Mbuffer *buff, size_t n) {
|
|
if (n > buff->buffsize) {
|
|
if (n < LUA_MINBUFFER) n = LUA_MINBUFFER;
|
|
luaZ_resizebuffer(L, buff, n);
|
|
}
|
|
return buff->buffer;
|
|
}
|
|
/* END CSTYLED */
|