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udf.c
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/* $NetBSD: udf.c,v 1.25 2022/04/09 10:05:35 riastradh Exp $ */
/*
* Copyright (c) 2006, 2008, 2013, 2021, 2022 Reinoud Zandijk
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
//__RCSID("$NetBSD: udf.c,v 1.25 2022/04/09 10:05:35 riastradh Exp $");
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <time.h>
#include <assert.h>
#include <err.h>
#include <unistd.h>
#include <fcntl.h>
#include <math.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include "util.h"
#if !HAVE_NBTOOL_CONFIG_H
#define _EXPOSE_MMC
#include "cdio.h"
#else
#include "udf/cdio_mmc_structs.h"
#endif
#if !HAVE_NBTOOL_CONFIG_H
#define HAVE_STRUCT_TM_TM_GMTOFF
#endif
#include "makefs.h"
#include "udf_core.h"
#include "newfs_udf.h"
/* identification */
#define IMPL_NAME "*NetBSD makefs 10.0"
#define APP_VERSION_MAIN 0
#define APP_VERSION_SUB 5
/*
* Note: due to the setup of the newfs code, the current state of the program
* and its options are held in a few global variables. The FS specific parts
* are in global `context' and 'layout' structures.
*/
/* global variables describing disc and format requests */
int req_enable, req_disable;
/* --------------------------------------------------------------------- */
static int
udf_readonly_format(void)
{
/*
* we choose the emulated profile to determine this since the media
* might be different from the format we create. Say creating a CDROM
* on a CD-R media.
*/
switch (emul_mmc_profile) {
case 0x00: /* unknown, treat as CDROM */
case 0x08: /* CDROM */
case 0x10: /* DVDROM */
case 0x40: /* BDROM */
return true;
}
return false;
}
#define OPT_STR(letter, name, desc) \
{ letter, name, NULL, OPT_STRBUF, 0, 0, desc }
#define OPT_NUM(letter, name, field, min, max, desc) \
{ letter, name, &context.field, \
sizeof(context.field) == 8 ? OPT_INT64 : \
(sizeof(context.field) == 4 ? OPT_INT32 : \
(sizeof(context.field) == 2 ? OPT_INT16 : OPT_INT8)), \
min, max, desc }
#define OPT_BOOL(letter, name, field, desc) \
OPT_NUM(letter, name, field, 0, 1, desc)
void
udf_prep_opts(fsinfo_t *fsopts)
{
const option_t udf_options[] = {
OPT_STR('T', "disctype", "disc type (cdrom,dvdrom,bdrom,"
"dvdram,bdre,disk,cdr,dvdr,bdr,cdrw,dvdrw)"),
OPT_STR('L', "loglabel", "\"logical volume name\""),
OPT_STR('P', "discid", "\"[volset name ':']"
"physical volume name\""),
OPT_NUM('t', "tz", gmtoff, -24, 24, "timezone"),
OPT_STR('v', "minver", "minimum UDF version in either "
"``0x201'' or ``2.01'' format"),
OPT_STR('V', "maxver", "maximum UDF version in either "
"``0x201'' or ``2.01'' format"),
OPT_NUM('p', "metaperc", meta_perc, 1, 99,
"minimum free metadata percentage"),
OPT_BOOL('c', "checksurface", check_surface,
"perform crude surface check on rewritable media"),
OPT_BOOL('F', "forceformat", create_new_session,
"force file system construction on non-empty recordable media"),
{ .name = NULL }
};
/* initialise */
req_enable = req_disable = 0;
fsopts->sectorsize = 512; /* minimum allowed sector size */
srandom((unsigned long) time(NULL));
udf_init_create_context();
context.app_name = "*NetBSD UDF";
context.app_version_main = APP_VERSION_MAIN;
context.app_version_sub = APP_VERSION_SUB;
context.impl_name = IMPL_NAME;
/* minimum and maximum UDF versions we advise */
context.min_udf = 0x102;
context.max_udf = 0x250; /* 0x260 is not ready */
/* defaults for disc/files */
emul_mmc_profile = -1; /* invalid->no emulation */
emul_packetsize = 1; /* reasonable default */
emul_sectorsize = 512; /* minimum allowed sector size */
emul_size = 0; /* empty */
/* use user's time zone as default */
#if 0
//#ifdef HAVE_STRUCT_TM_TM_GMTOFF
if (!stampst.st_ino) {
struct tm tm;
time_t now;
(void)time(&now);
(void)localtime_r(&now, &tm);
context.gmtoff = tm.tm_gmtoff;
} else
#endif
context.gmtoff = 0;
/* return info */
fsopts->fs_specific = NULL;
fsopts->fs_options = copy_opts(udf_options);
}
void
udf_cleanup_opts(fsinfo_t *fsopts)
{
free(fsopts->fs_options);
}
/* ----- included from newfs_udf.c ------ */
#define CDRSIZE ((uint64_t) 700*1024*1024) /* small approx */
#define CDRWSIZE ((uint64_t) 576*1024*1024) /* small approx */
#define DVDRSIZE ((uint64_t) 4488*1024*1024) /* small approx */
#define DVDRAMSIZE ((uint64_t) 4330*1024*1024) /* small approx with spare */
#define DVDRWSIZE ((uint64_t) 4482*1024*1024) /* small approx */
#define BDRSIZE ((uint64_t) 23866*1024*1024) /* small approx */
#define BDRESIZE ((uint64_t) 23098*1024*1024) /* small approx */
int
udf_parse_opts(const char *option, fsinfo_t *fsopts)
{
option_t *udf_options = fsopts->fs_options;
uint64_t stdsize, maxsize;
uint32_t set_sectorsize;
char buffer[1024], *buf, *colon;
int i;
assert(option != NULL);
if (debug & DEBUG_FS_PARSE_OPTS)
printf("udf_parse_opts: got `%s'\n", option);
i = set_option(udf_options, option, buffer, sizeof(buffer));
if (i == -1)
return 0;
if (udf_options[i].name == NULL)
abort();
set_sectorsize = 0;
stdsize = 0;
maxsize = 0;
buf = buffer;
switch (udf_options[i].letter) {
case 'T':
if (strcmp(buf, "cdrom") == 0) {
emul_mmc_profile = 0x00;
maxsize = CDRSIZE;
} else if (strcmp(buf, "dvdrom") == 0) {
emul_mmc_profile = 0x10;
maxsize = DVDRSIZE;
} else if (strcmp(buf, "bdrom") == 0) {
emul_mmc_profile = 0x40;
maxsize = BDRSIZE;
} else if (strcmp(buf, "dvdram") == 0) {
emul_mmc_profile = 0x12;
stdsize = DVDRAMSIZE;
} else if (strcmp(buf, "bdre") == 0) {
emul_mmc_profile = 0x43;
stdsize = BDRESIZE;
} else if (strcmp(buf, "disk") == 0) {
emul_mmc_profile = 0x01;
} else if (strcmp(buf, "cdr") == 0) {
emul_mmc_profile = 0x09;
stdsize = CDRSIZE;
} else if (strcmp(buf, "dvdr") == 0) {
emul_mmc_profile = 0x1b;
stdsize = DVDRSIZE;
} else if (strcmp(buf, "bdr") == 0) {
emul_mmc_profile = 0x41;
stdsize = BDRSIZE;
} else if (strcmp(buf, "cdrw") == 0) {
emul_mmc_profile = 0x0a;
stdsize = CDRWSIZE;
} else if (strcmp(buf, "dvdrw") == 0) {
emul_mmc_profile = 0x1a;
stdsize = DVDRWSIZE;
} else {
errx(1, "unknown or unimplemented disc format");
}
if (emul_mmc_profile != 0x01)
set_sectorsize = 2048;
break;
case 'L':
if (context.logvol_name) free(context.logvol_name);
context.logvol_name = strdup(buf);
break;
case 'P':
if ((colon = strstr(buf, ":"))) {
if (context.volset_name)
free(context.volset_name);
*colon = 0;
context.volset_name = strdup(buf);
buf = colon+1;
}
if (context.primary_name)
free(context.primary_name);
if ((strstr(buf, ":")))
errx(1, "primary name can't have ':' in its name");
context.primary_name = strdup(buf);
break;
case 'v':
context.min_udf = a_udf_version(buf, "min_udf");
if (context.min_udf > 0x250)
errx(1, "maximum supported version is UDF 2.50");
if (context.min_udf > context.max_udf)
context.max_udf = context.min_udf;
break;
case 'V':
context.max_udf = a_udf_version(buf, "min_udf");
if (context.max_udf > 0x250)
errx(1, "maximum supported version is UDF 2.50");
if (context.min_udf > context.max_udf)
context.min_udf = context.max_udf;
break;
}
if (set_sectorsize)
fsopts->sectorsize = set_sectorsize;
if (stdsize) {
if (fsopts->maxsize > 0)
stdsize = MIN(stdsize, (uint64_t) fsopts->maxsize);
if (fsopts->minsize > 0)
stdsize = MAX(stdsize, (uint64_t) fsopts->minsize);
fsopts->size = fsopts->minsize = fsopts->maxsize = stdsize;
}
if (maxsize) {
if (fsopts->maxsize > 0)
maxsize = MIN(maxsize, (uint64_t) fsopts->maxsize);
if (fsopts->minsize > 0)
maxsize = MAX(maxsize, (uint64_t) fsopts->minsize);
fsopts->maxsize = maxsize;
}
return 1;
}
/* -
* -------------------------------------------------------------------- */
struct udf_stats {
uint32_t nfiles;
uint32_t ndirs;
uint32_t ndescr;
uint32_t nmetadatablocks;
uint32_t ndatablocks;
};
/* node reference administration */
static void
udf_inc_link(union dscrptr *dscr)
{
struct file_entry *fe;
struct extfile_entry *efe;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
fe->link_cnt = udf_rw16(udf_rw16(fe->link_cnt) + 1);
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
efe->link_cnt = udf_rw16(udf_rw16(efe->link_cnt) + 1);
} else {
errx(1, "bad tag passed to udf_inc_link");
}
}
static void
udf_set_link_cnt(union dscrptr *dscr, int num)
{
struct file_entry *fe;
struct extfile_entry *efe;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
fe->link_cnt = udf_rw16(num);
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
efe->link_cnt = udf_rw16(num);
} else {
errx(1, "bad tag passed to udf_set_link_cnt");
}
}
static uint32_t
udf_datablocks(off_t sz)
{
/* predictor if it can be written inside the node */
/* XXX the predictor assumes NO extended attributes in the node */
if (sz < context.sector_size - UDF_EXTFENTRY_SIZE - 16)
return 0;
return UDF_ROUNDUP(sz, context.sector_size) / context.sector_size;
}
static void
udf_prepare_fids(struct long_ad *dir_icb, struct long_ad *dirdata_icb,
uint8_t *dirdata, uint32_t dirdata_size)
{
struct fileid_desc *fid;
struct long_ad *icb;
uint32_t fidsize, offset;
uint32_t location;
if (udf_datablocks(dirdata_size) == 0) {
/* going internal */
icb = dir_icb;
} else {
/* external blocks to write to */
icb = dirdata_icb;
}
for (offset = 0; offset < dirdata_size; offset += fidsize) {
/* for each FID: */
fid = (struct fileid_desc *) (dirdata + offset);
assert(udf_rw16(fid->tag.id) == TAGID_FID);
location = udf_rw32(icb->loc.lb_num);
location += offset / context.sector_size;
fid->tag.tag_loc = udf_rw32(location);
udf_validate_tag_and_crc_sums((union dscrptr *) fid);
fidsize = udf_fidsize(fid);
}
}
static int
udf_file_inject_blob(union dscrptr *dscr, uint8_t *blob, off_t size)
{
struct icb_tag *icb;
struct file_entry *fe;
struct extfile_entry *efe;
uint64_t inf_len, obj_size;
uint32_t l_ea, l_ad;
uint16_t crclen;
uint8_t *data, *pos;
fe = NULL;
efe = NULL;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
data = fe->data;
l_ea = udf_rw32(fe->l_ea);
l_ad = udf_rw32(fe->l_ad);
icb = &fe->icbtag;
inf_len = udf_rw64(fe->inf_len);
obj_size = 0;
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
data = efe->data;
l_ea = udf_rw32(efe->l_ea);
l_ad = udf_rw32(efe->l_ad);
icb = &efe->icbtag;
inf_len = udf_rw64(efe->inf_len);
obj_size = udf_rw64(efe->obj_size);
} else {
errx(1, "bad tag passed to udf_file_inject_blob");
}
crclen = udf_rw16(dscr->tag.desc_crc_len);
/* check if we can go internal */
if ((udf_rw16(icb->flags) & UDF_ICB_TAG_FLAGS_ALLOC_MASK) !=
UDF_ICB_INTERN_ALLOC)
return 1;
/* check if it will fit internally */
if (udf_datablocks(size)) {
/* the predictor tells it won't fit internally */
return 1;
}
/* going internal */
assert((udf_rw16(icb->flags) & UDF_ICB_TAG_FLAGS_ALLOC_MASK) ==
UDF_ICB_INTERN_ALLOC);
assert(l_ad == 0);
pos = data + l_ea + l_ad;
memcpy(pos, blob, size);
l_ad += size;
crclen += size;
inf_len += size;
obj_size += size;
if (fe) {
fe->l_ad = udf_rw32(l_ad);
fe->inf_len = udf_rw64(inf_len);
} else if (efe) {
efe->l_ad = udf_rw32(l_ad);
efe->inf_len = udf_rw64(inf_len);
efe->obj_size = udf_rw64(inf_len);
}
/* make sure the header sums stays correct */
dscr->tag.desc_crc_len = udf_rw16(crclen);
udf_validate_tag_and_crc_sums(dscr);
return 0;
}
/* XXX no sparse file support */
static void
udf_append_file_mapping(union dscrptr *dscr, struct long_ad *piece)
{
struct icb_tag *icb;
struct file_entry *fe;
struct extfile_entry *efe;
struct long_ad *last_long, last_piece;
struct short_ad *last_short, new_short;
uint64_t inf_len, obj_size, logblks_rec;
uint32_t l_ea, l_ad, size;
uint32_t last_lb_num, piece_lb_num;
uint64_t last_len, piece_len, last_flags;
uint64_t rest_len, merge_len, last_end;
uint16_t last_part_num, piece_part_num;
uint16_t crclen, cur_alloc;
uint8_t *data, *pos;
const int short_len = sizeof(struct short_ad);
const int long_len = sizeof(struct long_ad);
const int sector_size = context.sector_size;
uint64_t max_len = UDF_ROUNDDOWN(UDF_EXT_MAXLEN, sector_size);
int use_shorts;
fe = NULL;
efe = NULL;
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe = &dscr->fe;
data = fe->data;
l_ea = udf_rw32(fe->l_ea);
l_ad = udf_rw32(fe->l_ad);
icb = &fe->icbtag;
inf_len = udf_rw64(fe->inf_len);
logblks_rec = udf_rw64(fe->logblks_rec);
obj_size = 0;
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe = &dscr->efe;
data = efe->data;
l_ea = udf_rw32(efe->l_ea);
l_ad = udf_rw32(efe->l_ad);
icb = &efe->icbtag;
inf_len = udf_rw64(efe->inf_len);
obj_size = udf_rw64(efe->obj_size);
logblks_rec = udf_rw64(efe->logblks_rec);
} else {
errx(1, "bad tag passed to udf_file_append_blob");
}
crclen = udf_rw16(dscr->tag.desc_crc_len);
/* we use shorts if referring inside the metadata partition */
use_shorts = (udf_rw16(piece->loc.part_num) == context.metadata_part);
pos = data + l_ea;
cur_alloc = udf_rw16(icb->flags);
size = UDF_EXT_LEN(udf_rw32(piece->len));
/* extract last entry as a long_ad */
memset(&last_piece, 0, sizeof(last_piece));
last_len = 0;
last_lb_num = 0;
last_part_num = 0;
last_flags = 0;
last_short = NULL;
last_long = NULL;
if (l_ad != 0) {
if (use_shorts) {
assert(cur_alloc == UDF_ICB_SHORT_ALLOC);
pos += l_ad - short_len;
last_short = (struct short_ad *) pos;
last_lb_num = udf_rw32(last_short->lb_num);
last_part_num = udf_rw16(piece->loc.part_num);
last_len = UDF_EXT_LEN(udf_rw32(last_short->len));
last_flags = UDF_EXT_FLAGS(udf_rw32(last_short->len));
} else {
assert(cur_alloc == UDF_ICB_LONG_ALLOC);
pos += l_ad - long_len;
last_long = (struct long_ad *) pos;
last_lb_num = udf_rw32(last_long->loc.lb_num);
last_part_num = udf_rw16(last_long->loc.part_num);
last_len = UDF_EXT_LEN(udf_rw32(last_long->len));
last_flags = UDF_EXT_FLAGS(udf_rw32(last_long->len));
}
}
piece_len = UDF_EXT_LEN(udf_rw32(piece->len));
piece_lb_num = udf_rw32(piece->loc.lb_num);
piece_part_num = udf_rw16(piece->loc.part_num);
/* try merging */
rest_len = max_len - last_len;
merge_len = MIN(piece_len, rest_len);
last_end = last_lb_num + (last_len / sector_size);
if ((piece_lb_num == last_end) && (last_part_num == piece_part_num)) {
/* we can merge */
last_len += merge_len;
piece_len -= merge_len;
/* write back merge result */
if (use_shorts) {
last_short->len = udf_rw32(last_len | last_flags);
} else {
last_long->len = udf_rw32(last_len | last_flags);
}
piece_lb_num += merge_len / sector_size;
}
if (piece_len) {
/* append new entry */
pos = data + l_ea + l_ad;
if (use_shorts) {
icb->flags = udf_rw16(UDF_ICB_SHORT_ALLOC);
memset(&new_short, 0, short_len);
new_short.len = udf_rw32(piece_len);
new_short.lb_num = udf_rw32(piece_lb_num);
memcpy(pos, &new_short, short_len);
l_ad += short_len;
crclen += short_len;
} else {
icb->flags = udf_rw16(UDF_ICB_LONG_ALLOC);
piece->len = udf_rw32(piece_len);
piece->loc.lb_num = udf_rw32(piece_lb_num);
memcpy(pos, piece, long_len);
l_ad += long_len;
crclen += long_len;
}
}
piece->len = udf_rw32(0);
inf_len += size;
obj_size += size;
logblks_rec += UDF_ROUNDUP(size, sector_size) / sector_size;
dscr->tag.desc_crc_len = udf_rw16(crclen);
if (udf_rw16(dscr->tag.id) == TAGID_FENTRY) {
fe->l_ad = udf_rw32(l_ad);
fe->inf_len = udf_rw64(inf_len);
fe->logblks_rec = udf_rw64(logblks_rec);
} else if (udf_rw16(dscr->tag.id) == TAGID_EXTFENTRY) {
efe->l_ad = udf_rw32(l_ad);
efe->inf_len = udf_rw64(inf_len);
efe->obj_size = udf_rw64(inf_len);
efe->logblks_rec = udf_rw64(logblks_rec);
}
}
static int
udf_append_file_contents(union dscrptr *dscr, struct long_ad *data_icb,
uint8_t *fdata, off_t flen)
{
struct long_ad icb;
uint32_t location;
uint16_t vpart;
int sectors;
if (udf_file_inject_blob(dscr, fdata, flen) == 0)
return 0;
/* has to be appended in mappings */
icb = *data_icb;
icb.len = udf_rw32(flen);
while (udf_rw32(icb.len) > 0)
udf_append_file_mapping(dscr, &icb);
udf_validate_tag_and_crc_sums(dscr);
/* write out data piece */
vpart = udf_rw16(data_icb->loc.part_num);
location = udf_rw32(data_icb->loc.lb_num);
sectors = udf_datablocks(flen);
return udf_write_virt(fdata, location, vpart, sectors);
}
static int
udf_create_new_file(struct stat *st, union dscrptr **dscr,
int filetype, struct long_ad *icb)
{
struct file_entry *fe;
struct extfile_entry *efe;
int error;
fe = NULL;
efe = NULL;
if (context.dscrver == 2) {
error = udf_create_new_fe(&fe, filetype, st);
if (error)
errx(error, "can't create fe");
*dscr = (union dscrptr *) fe;
icb->longad_uniqueid = udf_rw32(udf_rw64(fe->unique_id));
} else {
error = udf_create_new_efe(&efe, filetype, st);
if (error)
errx(error, "can't create fe");
*dscr = (union dscrptr *) efe;
icb->longad_uniqueid = udf_rw32(udf_rw64(efe->unique_id));
}
return 0;
}
static void
udf_estimate_walk(fsinfo_t *fsopts,
fsnode *root, char *dir, struct udf_stats *stats)
{
struct fileid_desc *fid;
struct long_ad dummy_ref;
fsnode *cur;
fsinode *fnode;
size_t pathlen = strlen(dir);
char *mydir = dir + pathlen;
off_t sz;
uint32_t nblk, ddoff;
uint32_t softlink_len;
uint8_t *softlink_buf;
int nentries;
int error;
stats->ndirs++;
/*
* Count number of directory entries and count directory size; needed
* for the reservation of enough space for the directory. Pity we
* don't keep the FIDs we created. If it turns out to be a issue we
* can cache it later.
*/
fid = (struct fileid_desc *) malloc(context.sector_size);
assert(fid);
ddoff = 40; /* '..' entry */
for (cur = root, nentries = 0; cur != NULL; cur = cur->next) {
switch (cur->type & S_IFMT) {
default:
/* what kind of nodes? */
break;
case S_IFCHR:
case S_IFBLK:
/* not supported yet */
break;
case S_IFDIR:
if (strcmp(cur->name, ".") == 0)
continue;
/* FALLTHROUGH */
case S_IFLNK:
case S_IFREG:
/* create dummy FID to see how long name will become */
memset(&dummy_ref, 0, sizeof(dummy_ref));
udf_create_fid(ddoff, fid, cur->name, 0, &dummy_ref);
nentries++;
ddoff += udf_fidsize(fid);
break;
}
}
sz = ddoff;
root->inode->st.st_size = sz; /* max now */
root->inode->flags |= FI_SIZED;
nblk = udf_datablocks(sz);
stats->nmetadatablocks += nblk;
/* for each entry in the directory, there needs to be a (E)FE */
stats->nmetadatablocks += nentries + 1;
/* recurse */
for (cur = root; cur != NULL; cur = cur->next) {
switch (cur->type & S_IFMT) {
default:
/* what kind of nodes? */
break;
case S_IFDIR:
if (strcmp(cur->name, ".") == 0)
continue;
/* empty dir? */
if (!cur->child)
break;
mydir[0] = '/';
strncpy(&mydir[1], cur->name, MAXPATHLEN - pathlen);
udf_estimate_walk(fsopts, cur->child, dir, stats);
mydir[0] = '\0';
break;
case S_IFCHR:
case S_IFBLK:
/* not supported yet */
// stats->nfiles++;
break;
case S_IFREG:
fnode = cur->inode;
/* don't double-count hard-links */
if (!(fnode->flags & FI_SIZED)) {
sz = fnode->st.st_size;
nblk = udf_datablocks(sz);
stats->ndatablocks += nblk;
/* ... */
fnode->flags |= FI_SIZED;
}
stats->nfiles++;
break;
case S_IFLNK:
/* softlink */
fnode = cur->inode;
/* don't double-count hard-links */
if (!(fnode->flags & FI_SIZED)) {
error = udf_encode_symlink(&softlink_buf,
&softlink_len, cur->symlink);
if (error) {
printf("SOFTLINK error %d\n", error);
break;
}
nblk = udf_datablocks(softlink_len);
stats->ndatablocks += nblk;
fnode->flags |= FI_SIZED;
free(softlink_buf);
}
stats->nfiles++;
break;
}
}
}
#define UDF_MAX_CHUNK_SIZE (4*1024*1024)
static int
udf_copy_file(struct stat *st, char *path, fsnode *cur, struct fileid_desc *fid,
struct long_ad *icb)
{
union dscrptr *dscr;
struct long_ad data_icb;
fsinode *fnode;
off_t sz, chunk, rd;
uint8_t *data;
bool intern;
int nblk;
int f;
int error;
fnode = cur->inode;
f = open(path, O_RDONLY);
if (f < 0) {
warn("Can't open file %s for reading", cur->name);
return errno;
}
/* claim disc space for the (e)fe descriptor for this file */
udf_metadata_alloc(1, icb);
udf_create_new_file(st, &dscr, UDF_ICB_FILETYPE_RANDOMACCESS, icb);
sz = fnode->st.st_size;
chunk = MIN(sz, UDF_MAX_CHUNK_SIZE);
data = malloc(MAX(UDF_ROUNDUP(chunk, context.sector_size), context.sector_size));
assert(data);
intern = (udf_datablocks(chunk) == 0);
error = 0;
while (chunk) {
rd = read(f, data, chunk);
if (rd != chunk) {
warn("Short read of file %s", cur->name);
error = errno;
break;
}
nblk = UDF_ROUNDUP(chunk, context.sector_size) / context.sector_size;
if (chunk && !intern)
udf_data_alloc(nblk, &data_icb);
udf_append_file_contents(dscr, &data_icb, data, chunk);
sz -= chunk;
chunk = MIN(sz, UDF_MAX_CHUNK_SIZE);
}
close(f);
free(data);
/* write out dscr (e)fe */
udf_set_link_cnt(dscr, fnode->nlink);
udf_write_dscr_virt(dscr, udf_rw32(icb->loc.lb_num),
udf_rw16(icb->loc.part_num), 1);
free(dscr);
/* remember our location for hardlinks */
cur->inode->fsuse = malloc(sizeof(struct long_ad));
memcpy(cur->inode->fsuse, icb, sizeof(struct long_ad));
return error;
}
static int
udf_populate_walk(fsinfo_t *fsopts, fsnode *root, char *dir,
struct long_ad *parent_icb, struct long_ad *dir_icb)
{
union dscrptr *dir_dscr, *dscr;
struct fileid_desc *fid;
struct long_ad icb, data_icb, dirdata_icb;
fsnode *cur;
fsinode *fnode;
size_t pathlen = strlen(dir);
size_t dirlen;
char *mydir = dir + pathlen;
uint32_t nblk, ddoff;
uint32_t softlink_len;
uint8_t *softlink_buf;
uint8_t *dirdata;
int error, ret, retval;
/* claim disc space for the (e)fe descriptor for this dir */
udf_metadata_alloc(1, dir_icb);
/* create new e(fe) */
udf_create_new_file(&root->inode->st, &dir_dscr,
UDF_ICB_FILETYPE_DIRECTORY, dir_icb);
/* allocate memory for the directory contents */
dirlen = root->inode->st.st_size;
nblk = UDF_ROUNDUP(dirlen, context.sector_size) / context.sector_size;
dirdata = malloc(nblk * context.sector_size);
assert(dirdata);
memset(dirdata, 0, nblk * context.sector_size);
/* create and append '..' */
fid = (struct fileid_desc *) dirdata;
ddoff = udf_create_parentfid(fid, parent_icb);
assert(ddoff == 40);
/* for '..' */
udf_inc_link(dir_dscr);
/* recurse */
retval = 0;
for (cur = root; cur != NULL; cur = cur->next) {
mydir[0] = '/';
strncpy(&mydir[1], cur->name, MAXPATHLEN - pathlen);
fid = (struct fileid_desc *) (dirdata + ddoff);
switch (cur->type & S_IFMT) {
default:
/* what kind of nodes? */
retval = 2;
break;
case S_IFCHR:
case S_IFBLK:
/* not supported */
retval = 2;
warnx("device node %s not supported", dir);
break;
case S_IFDIR:
/* not an empty dir? */
if (strcmp(cur->name, ".") == 0)
break;
assert(cur->child);
if (cur->child) {
ret = udf_populate_walk(fsopts, cur->child,
dir, dir_icb, &icb);
if (ret)
retval = 2;
}
udf_create_fid(ddoff, fid, cur->name,
UDF_FILE_CHAR_DIR, &icb);
udf_inc_link(dir_dscr);
ddoff += udf_fidsize(fid);
break;
case S_IFREG:
fnode = cur->inode;
/* don't re-copy hard-links */
if (!(fnode->flags & FI_WRITTEN)) {
printf("%s\n", dir);
error = udf_copy_file(&fnode->st, dir, cur,
fid, &icb);
if (!error) {
fnode->flags |= FI_WRITTEN;
udf_create_fid(ddoff, fid, cur->name,
0, &icb);
ddoff += udf_fidsize(fid);
} else {
retval = 2;
}
} else {
/* hardlink! */
printf("%s (hardlink)\n", dir);
udf_create_fid(ddoff, fid, cur->name,
0, (struct long_ad *) (fnode->fsuse));
ddoff += udf_fidsize(fid);
}
fnode->nlink--;
if (fnode->nlink == 0)
free(fnode->fsuse);
break;
case S_IFLNK:
/* softlink */
fnode = cur->inode;
printf("%s -> %s\n", dir, cur->symlink);
error = udf_encode_symlink(&softlink_buf,
&softlink_len, cur->symlink);
if (error) {
printf("SOFTLINK error %d\n", error);
retval = 2;
break;
}
udf_metadata_alloc(1, &icb);
udf_create_new_file(&fnode->st, &dscr,
UDF_ICB_FILETYPE_SYMLINK, &icb);
nblk = udf_datablocks(softlink_len);
if (nblk > 0)
udf_data_alloc(nblk, &data_icb);
udf_append_file_contents(dscr, &data_icb,
softlink_buf, softlink_len);
/* write out dscr (e)fe */
udf_inc_link(dscr);
udf_write_dscr_virt(dscr, udf_rw32(icb.loc.lb_num),
udf_rw16(icb.loc.part_num), 1);
free(dscr);
free(softlink_buf);