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bztsrc--bootboot/mkbootimg/fsZ.c

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/*
* mkbootimg/fsZ.c
*
* Copyright (C) 2017 - 2021 bzt (bztsrc@gitlab)
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*
* This file is part of the BOOTBOOT Protocol package.
* @brief FS/Z file system driver
*
*/
#include "main.h"
#include "fsZ.h"
int fsz_secsize = FSZ_SECSIZE, fsz_max = 0;
unsigned char fsz_emptysec[FSZ_SECSIZE] = {0};
/* private functions */
static int fsz_direntcmp(const void *a, const void *b)
{
return strcmp((char *)((FSZ_DirEnt *)a)->name,(char *)((FSZ_DirEnt *)b)->name);
}
int fsz_add_inode(char *filetype, char *mimetype)
{
unsigned int i,j=!strcmp(filetype,FSZ_FILETYPE_SYMLINK)||!strcmp(filetype,FSZ_FILETYPE_UNION)?fsz_secsize-1024:36;
FSZ_Inode *in;
FSZ_DirEntHeader *hdr;
if(fsz_max && fs_len+fsz_secsize > fsz_max) {
fprintf(stderr,"mkbootimg: partition #%d %s\n", fs_no, lang[ERR_TOOBIG]);
exit(1);
}
fs_base=realloc(fs_base,fs_len+fsz_secsize);
if(!fs_base) { fprintf(stderr,"mkbootimg: %s\r\n", lang[ERR_MEM]); exit(1); }
memset(fs_base+fs_len,0,fsz_secsize);
in=(FSZ_Inode *)(fs_base+fs_len);
memcpy(in->magic,FSZ_IN_MAGIC,4);
memcpy((char*)&in->owner,"root",5);
in->owner.access=FSZ_READ|FSZ_WRITE|FSZ_DELETE|(filetype && (
!strcmp(filetype,FSZ_FILETYPE_DIR) || !strcmp(filetype,FSZ_FILETYPE_UNION))? FSZ_EXEC : 0);
if(filetype!=NULL){
i=strlen(filetype);
memcpy(in->filetype,filetype,i>4?4:i);
if(!strcmp(filetype,FSZ_FILETYPE_DIR)){
hdr=(FSZ_DirEntHeader *)(in->data.small.inlinedata);
in->sec=hdr->fid=fs_len/fsz_secsize;
in->flags=FSZ_IN_FLAG_INLINE;
in->size=sizeof(FSZ_DirEntHeader);
memcpy(in->data.small.inlinedata,FSZ_DIR_MAGIC,4);
hdr->checksum=crc32_calc((unsigned char*)hdr + 16, in->size - 16);
}
}
if(mimetype!=NULL){
if(!strcmp(filetype,FSZ_FILETYPE_UNION)){
for(i=1;i<j && !(mimetype[i-1]==0 && mimetype[i]==0);i++);
i++;
} else {
i=strlen(mimetype);
}
memcpy(j==36?in->mimetype:in->data.small.inlinedata,mimetype,i>j?j:i);
if(j!=36)
in->size=i;
}
in->changedate=in->createdate=t * 1000000;
in->modifydate=t * 1000000;
in->checksum=crc32_calc(in->filetype,1016);
fs_len+=fsz_secsize;
return fs_len/fsz_secsize-1;
}
void fsz_link_inode(int inode, char *path, int toinode)
{
unsigned int ns=0,cnt=0,l=strlen(path);
FSZ_DirEntHeader *hdr;
FSZ_DirEnt *ent;
FSZ_Inode *in, *in2;
if(toinode==0)
toinode=((FSZ_SuperBlock *)fs_base)->rootdirfid;
hdr=(FSZ_DirEntHeader *)(fs_base+toinode*fsz_secsize+1024);
ent=(FSZ_DirEnt *)hdr; ent++;
while(path[ns]!='/'&&path[ns]!=0) ns++;
while(ent->fid!=0 && cnt<(unsigned int)((fsz_secsize-1024)/128-1)) {
if(!strncmp((char *)(ent->name),path,ns+1)) {
fsz_link_inode(inode,path+ns+1,ent->fid);
return;
}
ent++; cnt++;
}
in=((FSZ_Inode *)(fs_base+toinode*fsz_secsize));
in2=((FSZ_Inode *)(fs_base+inode*fsz_secsize));
ent->fid=inode;
if(l > 110) l = 110;
memcpy(ent->name,path,l);
if(!strncmp((char *)(((FSZ_Inode *)(fs_base+inode*fsz_secsize))->filetype),FSZ_FILETYPE_DIR,4)){
ent->name[l]='/';
}
/* the format can hold 2^127 directory entries, but we only implement directories embedded in inodes here, up to 23 */
if(hdr->numentries >= (fsz_secsize - 1024 - sizeof(FSZ_DirEntHeader)) / sizeof(FSZ_DirEnt)) {
fprintf(stderr,"mkbootimg: partition #%d %s: %s\n", fs_no, lang[ERR_TOOMANY], path); exit(1);
}
hdr->numentries++;
in->modifydate=t * 1000000;
in->size+=sizeof(FSZ_DirEnt);
qsort((char*)hdr+sizeof(FSZ_DirEntHeader), hdr->numentries, sizeof(FSZ_DirEnt), fsz_direntcmp);
hdr->checksum=crc32_calc((unsigned char*)hdr + 16, in->size - 16);
in->checksum=crc32_calc(in->filetype,1016);
in2->numlinks++;
in2->checksum=crc32_calc(in2->filetype,1016);
}
void fsz_add_file(char *name, unsigned char *data, unsigned long int size)
{
FSZ_Inode *in;
unsigned char *ptr;
long int i,j,k,l,s=((size+fsz_secsize-1)/fsz_secsize)*fsz_secsize;
int inode=fsz_add_inode(data[0]==0x55 && data[1]==0xAA &&
data[3]==0xE9 && data[8]=='B' &&
data[12]=='B'?"boot":"application","octet-stream");
if(fsz_max && fs_len+fsz_secsize+s > fsz_max) {
fprintf(stderr,"mkbootimg: partition #%d %s: %s\n", fs_no, lang[ERR_TOOBIG], name);
exit(1);
}
fs_base=realloc(fs_base,fs_len+fsz_secsize+s);
if(!fs_base) { fprintf(stderr,"mkbootimg: %s\r\n", lang[ERR_MEM]); exit(1); }
memset(fs_base+fs_len,0,fsz_secsize);
in=(FSZ_Inode *)(fs_base+inode*fsz_secsize);
in->changedate=t * 1000000;
in->modifydate=t * 1000000;
in->size=size;
if(size<=(unsigned long int)fsz_secsize-1024) {
in->sec=inode;
in->flags=FSZ_IN_FLAG_INLINE;
in->numblocks=0;
memcpy(in->data.small.inlinedata,data,size);
s=0;
} else {
in->sec=fs_len/fsz_secsize;
if(size>(unsigned long int)fsz_secsize) {
j=s/fsz_secsize;
if(j*16>fsz_secsize){ fprintf(stderr,"mkbootimg: partition #%d %s: %s\n", fs_no, lang[ERR_TOOBIG], name); exit(1); }
if(j*16<=fsz_secsize-1024) {
ptr=(unsigned char*)&in->data.small.inlinedata;
in->flags=FSZ_IN_FLAG_SD0;
in->numblocks=0;
l=0;
} else {
ptr=fs_base+size;
in->flags=FSZ_IN_FLAG_SD1;
in->numblocks=1;
l=1;
}
k=inode+1+l;
for(i=0;i<j;i++){
/* no spare blocks allowed in initrd, there we must save a sector full of zeros */
if(!fsz_max || memcmp(data+i*fsz_secsize,fsz_emptysec,fsz_secsize)) {
memcpy(ptr,&k,4);
memcpy(fs_base+size+(i+l)*fsz_secsize,data+i*fsz_secsize,
(unsigned long int)(i+l)*fsz_secsize>size?size%fsz_secsize:(unsigned long int)fsz_secsize);
k++;
in->numblocks++;
} else {
s-=fsz_secsize;
}
ptr+=16;
}
if(in->flags==FSZ_IN_FLAG_SD1)
size+=fsz_secsize;
} else {
in->flags=FSZ_IN_FLAG_DIRECT;
if(memcmp(data,fsz_emptysec,fsz_secsize)) {
in->numblocks=1;
memcpy(fs_base+fs_len,data,size);
} else {
in->sec=0;
in->numblocks=0;
}
}
}
if(!strncmp((char*)data+1,"ELF",3) || !strncmp((char*)data,"OS/Z",4) || !strncmp((char*)data,"CSBC",4) ||
!strncmp((char*)data,"\000asm",4))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"executable",10);in->owner.access|=FSZ_EXEC;}
if(!strcmp(name+strlen(name)-3,".so"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"sharedlib",9);}
else
if(!strcmp(name+strlen(name)-2,".h")||
!strcmp(name+strlen(name)-2,".c")||
!strcmp(name+strlen(name)-3,".md")||
!strcmp(name+strlen(name)-4,".txt")||
!strcmp(name+strlen(name)-5,".conf")
) {memset(in->mimetype,0,36);memcpy(in->mimetype,"plain",5);
memcpy(in->filetype,"text",4);
}
else
if(!strcmp(name+strlen(name)-3,".sh"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"shellscript",11);
memcpy(in->filetype,"text",4);in->owner.access|=FSZ_EXEC;
}
else
if(!strcmp(name+strlen(name)-4,".htm")||
!strcmp(name+strlen(name)-5,".html")
)
{memset(in->mimetype,0,36);memcpy(in->mimetype,"html",4);
memcpy(in->filetype,"text",4);
}
else
if(!strcmp(name+strlen(name)-4,".css"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"stylesheet",10);
memcpy(in->filetype,"text",4);
}
else
if(!strcmp(name+strlen(name)-4,".svg"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"svg",3);
memcpy(in->filetype,"imag",4);
}
else
if(!strcmp(name+strlen(name)-4,".gif"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"gif",3);
memcpy(in->filetype,"imag",4);
}
else
if(!strcmp(name+strlen(name)-4,".png"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"png",3);
memcpy(in->filetype,"imag",4);
}
else
if(!strcmp(name+strlen(name)-4,".jpg"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"jpeg",4);
memcpy(in->filetype,"imag",4);
}
else
if(!strcmp(name+strlen(name)-4,".bmp"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"bitmap",6);
memcpy(in->filetype,"imag",4);
}
else
if(!strcmp(name+strlen(name)-4,".sfn"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"ssfont",6);
memcpy(in->filetype,"font",4);
}
else
if(!strcmp(name+strlen(name)-4,".psf"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"pc-screen-font",14);
memcpy(in->filetype,"font",4);
}
else
if(!strcmp(name+strlen(name)-4,".ttf"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"sfnt",4);
memcpy(in->filetype,"font",4);
}
else
if(!strcmp(name+strlen(name)-4,".m3d"))
{memset(in->mimetype,0,36);memcpy(in->mimetype,"3d-model",8);
memcpy(in->filetype,data[1]=='d' ? "text" : "mode",4);
}
else {
j=1; for(i=0;i<read_size;i++) if(data[i]<9) { j=0; break; }
if(j) {
memset(in->mimetype,0,36);memcpy(in->mimetype,"plain",5);
memcpy(in->filetype,"text",4);
}
}
in->checksum=crc32_calc(in->filetype,1016);
fs_len+=s;
fsz_link_inode(inode,name,0);
}
/*** mkbootimg interface ***/
void fsz_open(gpt_t *gpt_entry)
{
FSZ_SuperBlock *sb;
fs_base = realloc(fs_base, 2*fsz_secsize);
if(!fs_base) { fprintf(stderr,"mkbootimg: %s\r\n", lang[ERR_MEM]); exit(1); }
memset(fs_base,0,2*fsz_secsize);
sb=(FSZ_SuperBlock *)(fs_base);
memcpy(sb->magic,FSZ_MAGIC,4);
sb->version_major=FSZ_VERSION_MAJOR;
sb->version_minor=FSZ_VERSION_MINOR;
sb->logsec=fsz_secsize==2048?0:(fsz_secsize==4096?1:2);
sb->maxmounts=255;
sb->currmounts=0;
sb->createdate=sb->lastmountdate=sb->lastumountdate=t * 1000000;
if(gpt_entry) {
memcpy(&sb->uuid, &gpt_entry->guid, 16);
fsz_max = (gpt_entry->last - gpt_entry->start + 1) * 512;
sb->numsec = fsz_max / fsz_secsize;
} else {
memcpy(&sb->uuid, (void*)&diskguid, sizeof(guid_t));
sb->uuid[15]--;
fsz_max = 0;
}
memcpy(sb->magic2,FSZ_MAGIC,4);
fs_len = fsz_secsize;
/* don't use sb after this point because add inode will realloc */
((FSZ_SuperBlock *)(fs_base))->rootdirfid = fsz_add_inode(FSZ_FILETYPE_DIR,FSZ_MIMETYPE_DIR_ROOT);
((FSZ_Inode*)(fs_base+fsz_secsize))->numlinks++;
}
void fsz_add(struct stat *st, char *name, unsigned char *content, int size)
{
int i;
char *fn = strrchr(name, '/');
if(!fn) fn = name; else fn++;
if(!strcmp(fn, ".") || !strcmp(fn, "..")) return;
if(S_ISDIR(st->st_mode)) {
i=fsz_add_inode(FSZ_FILETYPE_DIR,NULL);
fsz_link_inode(i,name,0);
} else
if(S_ISREG(st->st_mode)) {
fsz_add_file(name,content,size);
} else
if(S_ISLNK(st->st_mode) && content) {
i=fsz_add_inode(FSZ_FILETYPE_SYMLINK,(char*)content);
fsz_link_inode(i,name,0);
}
}
void fsz_close()
{
FSZ_SuperBlock *sb=(FSZ_SuperBlock *)(fs_base);
if(!sb) return;
if(!sb->numsec) sb->numsec = fs_len / fsz_secsize;
sb->freesec = fs_len / fsz_secsize;
sb->checksum = crc32_calc((unsigned char *)&sb->magic,508);
}
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