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/******************************************************/
/* tpax: a topological pax implementation */
/* Copyright (C) 2020 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.TPAX. */
/******************************************************/
#ifndef TPAX_DRIVER_IMPL_H
#define TPAX_DRIVER_IMPL_H
#include <stdint.h>
#include <dirent.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <tpax/tpax.h>
#include <tpax/tpax_specs.h>
#include "tpax_dprintf_impl.h"
#include "argv/argv.h"
#define TPAX_OPTV_ELEMENTS 64
#define TPAX_DIRENT_BUFLEN 65536
#define TPAX_FILEIO_BUFLEN (4096 * 1024)
#define TPAX_DRIVER_EXEC_MODE_WRITE_COPY \
(TPAX_DRIVER_EXEC_MODE_WRITE | \
TPAX_DRIVER_EXEC_MODE_COPY)
extern const struct argv_option tpax_default_options[];
enum app_tags {
TAG_HELP,
TAG_VERSION,
TAG_LIST,
TAG_READ,
TAG_WRITE,
TAG_COPY,
TAG_FORMAT,
TAG_BLKSIZE,
TAG_RECURSE,
TAG_NORECURSE,
TAG_STRICT_PATH,
TAG_PURE_PATH,
};
struct tpax_dirent {
int fdat;
int depth;
size_t nsize;
const struct tpax_dirent * parent;
struct dirent dirent;
};
struct tpax_dirent_buffer {
struct tpax_dirent_buffer * next;
size_t size;
size_t nfree;
struct tpax_dirent * cdent;
struct tpax_dirent dbuf[];
};
struct tpax_driver_ctx_impl {
struct tpax_common_ctx cctx;
struct tpax_driver_ctx ctx;
struct tpax_fd_ctx fdctx;
const struct tpax_unit_ctx * euctx;
const char * eunit;
struct tpax_error_info ** errinfp;
struct tpax_error_info ** erricap;
struct tpax_error_info * erriptr[64];
struct tpax_error_info erribuf[64];
struct tpax_dirent_buffer * dirents;
void * dirbuff;
void * bufaddr;
size_t bufsize;
off_t cpos;
};
struct tpax_unit_ctx_impl {
const char * path;
struct tpax_unit_ctx uctx;
struct stat st;
off_t hpos;
off_t dpos;
const char * link;
char linkbuf[1024];
union {
struct tpax_ustar_header uhdr;
struct tpax_cpio_header chdr;
} hdrbufs;
};
static inline struct tpax_driver_ctx_impl * tpax_get_driver_ictx(
const struct tpax_driver_ctx * dctx)
{
uintptr_t addr;
if (dctx) {
addr = (uintptr_t)dctx - offsetof(struct tpax_driver_ctx_impl,ctx);
return (struct tpax_driver_ctx_impl *)addr;
}
return 0;
}
static inline struct tpax_unit_ctx_impl * tpax_get_unit_ictx(
const struct tpax_unit_ctx * uctx)
{
struct tpax_unit_ctx_impl * ictx;
uintptr_t addr;
addr = (uintptr_t)uctx - offsetof(struct tpax_unit_ctx_impl,uctx);
ictx = (struct tpax_unit_ctx_impl *)addr;
return ictx;
}
static inline void * tpax_get_driver_anon_map_addr(
const struct tpax_driver_ctx * dctx,
size_t * size)
{
struct tpax_driver_ctx_impl * ictx = tpax_get_driver_ictx(dctx);
*size = ictx->bufsize;
return ictx->bufaddr;
}
static inline void * tpax_get_driver_getdents_buffer(
const struct tpax_driver_ctx * dctx)
{
struct tpax_driver_ctx_impl * ictx = tpax_get_driver_ictx(dctx);
return ictx->dirbuff;
}
static inline void tpax_driver_set_ectx(
const struct tpax_driver_ctx * dctx,
const struct tpax_unit_ctx * uctx,
const char * unit)
{
struct tpax_driver_ctx_impl * ictx;
ictx = tpax_get_driver_ictx(dctx);
ictx->euctx = uctx;
ictx->eunit = unit;
}
static inline int tpax_driver_fdin(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fdin;
}
static inline int tpax_driver_fdout(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fdout;
}
static inline int tpax_driver_fderr(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fderr;
}
static inline int tpax_driver_fdlog(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fdlog;
}
static inline int tpax_driver_fdcwd(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fdcwd;
}
static inline int tpax_driver_fddst(const struct tpax_driver_ctx * dctx)
{
struct tpax_fd_ctx fdctx;
tpax_get_driver_fdctx(dctx,&fdctx);
return fdctx.fddst;
}
static inline off_t tpax_get_driver_cpos(const struct tpax_driver_ctx * dctx)
{
struct tpax_driver_ctx_impl * ictx;
ictx = tpax_get_driver_ictx(dctx);
return ictx->cpos;
}
static inline void tpax_set_driver_cpos(const struct tpax_driver_ctx * dctx, off_t cpos)
{
struct tpax_driver_ctx_impl * ictx;
ictx = tpax_get_driver_ictx(dctx);
ictx->cpos = cpos;
}
static inline struct tpax_dirent_buffer * tpax_get_driver_dirents(const struct tpax_driver_ctx * dctx)
{
struct tpax_driver_ctx_impl * ictx;
ictx = tpax_get_driver_ictx(dctx);
return ictx->dirents;
}
static inline off_t tpax_get_unit_hpos(const struct tpax_unit_ctx * uctx)
{
struct tpax_unit_ctx_impl * ictx;
ictx = tpax_get_unit_ictx(uctx);
return ictx->hpos;
}
static inline void tpax_set_unit_hpos(const struct tpax_unit_ctx * uctx, off_t hpos)
{
struct tpax_unit_ctx_impl * ictx;
ictx = tpax_get_unit_ictx(uctx);
ictx->hpos = hpos;
}
static inline off_t tpax_get_unit_dpos(const struct tpax_unit_ctx * uctx)
{
struct tpax_unit_ctx_impl * ictx;
ictx = tpax_get_unit_ictx(uctx);
return ictx->dpos;
}
static inline void tpax_set_unit_dpos(const struct tpax_unit_ctx * uctx, off_t dpos)
{
struct tpax_unit_ctx_impl * ictx;
ictx = tpax_get_unit_ictx(uctx);
ictx->dpos = dpos;
}
static inline ssize_t tpax_get_archive_block_size(const struct tpax_driver_ctx * dctx)
{
if (dctx->cctx->drvflags & TPAX_DRIVER_WRITE_FORMAT_PAX)
return TPAX_PAX_BLOCK_SIZE;
else if (dctx->cctx->drvflags & TPAX_DRIVER_WRITE_FORMAT_CPIO)
return TPAX_CPIO_BLOCK_SIZE;
else if (dctx->cctx->drvflags & TPAX_DRIVER_WRITE_FORMAT_USTAR)
return TPAX_USTAR_BLOCK_SIZE;
else if (dctx->cctx->drvflags & TPAX_DRIVER_WRITE_FORMAT_RUSTAR)
return TPAX_USTAR_BLOCK_SIZE;
else
return 0;
}
#endif
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