ref: d39d1a5303541539f61488317b220c1eb724d7d3
dir: /sys/src/cmd/disk/prep/edisk.c/
/*
* edisk - edit gpt disk partition table
*/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <ctype.h>
#include <disk.h>
#include "edit.h"
#include <mp.h>
#include <libsec.h>
#define TB (1024LL*GB)
#define GB (1024*1024*1024)
#define MB (1024*1024)
#define KB (1024)
typedef struct Header Header;
typedef struct Entry Entry;
typedef struct Type Type;
typedef struct Flag Flag;
typedef struct Gptpart Gptpart;
struct Header
{
uchar sig[8];
uchar rev[4];
uchar hdrsiz[4];
uchar hdrcrc[4];
uchar zero[4];
uchar selflba[8];
uchar backlba[8];
uchar firstlba[8];
uchar lastlba[8];
uchar devid[16];
uchar tablba[8];
uchar entrycount[4];
uchar entrysize[4];
uchar tabcrc[4];
};
struct Entry
{
uchar typeid[16];
uchar partid[16];
uchar firstlba[8];
uchar lastlba[8];
uchar attr[8];
uchar name[72];
};
enum {
Headersiz = 92,
Entrysiz = 16+16+8+8+8+72,
};
struct Type {
uchar uuid[16];
char *name;
char *desc;
};
struct Flag {
uvlong f;
char c;
char *desc;
};
struct Gptpart {
Part;
Type *type; /* nil when not in use */
uvlong attr;
uchar uuid[16];
Rune label[72+1];
char namebuf[8];
};
static uchar *pmbr;
static Header *phdr;
static Header *bhdr;
static vlong partoff;
static vlong partend;
static Gptpart *parts;
static int nparts;
static uchar devid[16];
static uchar zeros[16];
/* RFC4122, but in little endian format */
#define UU(a,b,c,d,e) { \
(a)&255,((a)>>8)&255,((a)>>16)&255,((a)>>24)&255, \
(b)&255,((b)>>8)&255, \
(c)&255,((c)>>8)&255, \
((d)>>8)&255,(d)&255, \
((e)>>40)&255, ((e)>>32)&255, ((e)>>24)&255, ((e)>>16)&255, ((e)>>8)&255, (e)&255}
static Type types[100] = {
{UU(0x00000000,0x0000,0x0000,0x0000,0x000000000000ULL), "", "Unused entry"},
{UU(0x024DEE41,0x33E7,0x11D3,0x9D69,0x0008C781F39FULL), "mbr", "MBR partition"},
{UU(0xC12A7328,0xF81F,0x11D2,0xBA4B,0x00A0C93EC93BULL), "esp", "EFI System Partition"},
{UU(0x21686148,0x6449,0x6E6F,0x744E,0x656564454649ULL), "bios", "BIOS boot partition"},
{UU(0xD3BFE2DE,0x3DAF,0x11DF,0xBA40,0xE3A556D89593ULL), "iffs", "Intel Fast Flash"},
{UU(0xF4019732,0x066E,0x4E12,0x8273,0x346C5641494FULL), "sony", "Sony boot"},
{UU(0xBFBFAFE7,0xA34F,0x448A,0x9A5B,0x6213EB736C22ULL), "lenovo", "Lenovo boot"},
{UU(0xE3C9E316,0x0B5C,0x4DB8,0x817D,0xF92DF00215AEULL), "msr", "Microsoft Reserved Partition"},
{UU(0xEBD0A0A2,0xB9E5,0x4433,0x87C0,0x68B6B72699C7ULL), "dos", "Microsoft Basic data"},
{UU(0x5808C8AA,0x7E8F,0x42E0,0x85D2,0xE1E90434CFB3ULL), "ldmm", "Logical Disk Manager metadata"},
{UU(0xAF9B60A0,0x1431,0x4F62,0xBC68,0x3311714A69ADULL), "ldmd", "Logical Disk Manager data"},
{UU(0xDE94BBA4,0x06D1,0x4D40,0xA16A,0xBFD50179D6ACULL), "recovery", "Windows Recovery Environment"},
{UU(0x37AFFC90,0xEF7D,0x4E96,0x91C3,0x2D7AE055B174ULL), "gpfs", "IBM General Parallel File System"},
{UU(0xE75CAF8F,0xF680,0x4CEE,0xAFA3,0xB001E56EFC2DULL), "storagespaces", "Storage Spaces"},
{UU(0x75894C1E,0x3AEB,0x11D3,0xB7C1,0x7B03A0000000ULL), "hpuxdata", "HP-UX Data"},
{UU(0xE2A1E728,0x32E3,0x11D6,0xA682,0x7B03A0000000ULL), "hpuxserv", "HP-UX Service"},
{UU(0x0FC63DAF,0x8483,0x4772,0x8E79,0x3D69D8477DE4ULL), "linuxdata", "Linux Data"},
{UU(0xA19D880F,0x05FC,0x4D3B,0xA006,0x743F0F84911EULL), "linuxraid", "Linux RAID"},
{UU(0x0657FD6D,0xA4AB,0x43C4,0x84E5,0x0933C84B4F4FULL), "linuxswap", "Linux Swap"},
{UU(0xE6D6D379,0xF507,0x44C2,0xA23C,0x238F2A3DF928ULL), "linuxlvm", "Linux Logical Volume Manager"},
{UU(0x933AC7E1,0x2EB4,0x4F13,0xB844,0x0E14E2AEF915ULL), "linuxhome", "Linux /home"},
{UU(0x3B8F8425,0x20E0,0x4F3B,0x907F,0x1A25A76F98E8ULL), "linuxsrv", "Linux /srv"},
{UU(0x7FFEC5C9,0x2D00,0x49B7,0x8941,0x3EA10A5586B7ULL), "linuxcrypt", "Linux Plain dm-crypt"},
{UU(0xCA7D7CCB,0x63ED,0x4C53,0x861C,0x1742536059CCULL), "luks", "LUKS"},
{UU(0x8DA63339,0x0007,0x60C0,0xC436,0x083AC8230908ULL), "linuxreserved", "Linux Reserved"},
{UU(0x83BD6B9D,0x7F41,0x11DC,0xBE0B,0x001560B84F0FULL), "fbsdboot", "FreeBSD Boot"},
{UU(0x516E7CB4,0x6ECF,0x11D6,0x8FF8,0x00022D09712BULL), "fbsddata", "FreeBSD Data"},
{UU(0x516E7CB5,0x6ECF,0x11D6,0x8FF8,0x00022D09712BULL), "fbsdswap", "FreeBSD Swap"},
{UU(0x516E7CB6,0x6ECF,0x11D6,0x8FF8,0x00022D09712BULL), "fbsdufs", "FreeBSD Unix File System"},
{UU(0x516E7CB8,0x6ECF,0x11D6,0x8FF8,0x00022D09712BULL), "fbsdvvm", "FreeBSD Vinum volume manager"},
{UU(0x516E7CBA,0x6ECF,0x11D6,0x8FF8,0x00022D09712BULL), "fbsdzfs", "FreeBSD ZFS"},
{UU(0x48465300,0x0000,0x11AA,0xAA11,0x00306543ECACULL), "applehfs", "Apple HFS+"},
{UU(0x55465300,0x0000,0x11AA,0xAA11,0x00306543ECACULL), "appleufs", "Apple UFS"},
{UU(0x6A898CC3,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "applezfs", "Apple ZFS"},
{UU(0x52414944,0x0000,0x11AA,0xAA11,0x00306543ECACULL), "appleraid", "Apple RAID"},
{UU(0x52414944,0x5F4F,0x11AA,0xAA11,0x00306543ECACULL), "appleraidoff", "Apple RAID, offline"},
{UU(0x426F6F74,0x0000,0x11AA,0xAA11,0x00306543ECACULL), "appleboot", "Apple Boot"},
{UU(0x4C616265,0x6C00,0x11AA,0xAA11,0x00306543ECACULL), "applelabel", "Apple Label"},
{UU(0x5265636F,0x7665,0x11AA,0xAA11,0x00306543ECACULL), "appletv", "Apple TV Recovery"},
{UU(0x53746F72,0x6167,0x11AA,0xAA11,0x00306543ECACULL), "applecs", "Apple Core Storage"},
{UU(0x6A82CB45,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisboot", "Solaris Boot"},
{UU(0x6A85CF4D,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisroot", "Solaris Root"},
{UU(0x6A87C46F,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisswap", "Solaris Swap"},
{UU(0x6A8B642B,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisbakup", "Solaris Backup"},
{UU(0x6A898CC3,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisusr", "Solaris /usr"},
{UU(0x6A8EF2E9,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisvar", "Solaris /var"},
{UU(0x6A90BA39,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarishome", "Solaris /home"},
{UU(0x6A9283A5,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solarisalt", "Solaris Alternate sector"},
{UU(0x6A945A3B,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solaris", "Solaris Reserved"},
{UU(0x6A9630D1,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solaris", "Solaris Reserved"},
{UU(0x6A980767,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solaris", "Solaris Reserved"},
{UU(0x6A96237F,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solaris", "Solaris Reserved"},
{UU(0x6A8D2AC7,0x1DD2,0x11B2,0x99A6,0x080020736631ULL), "solaris", "Solaris Reserved"},
{UU(0x49F48D32,0xB10E,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdswap", "NetBSD Swap"},
{UU(0x49F48D5A,0xB10E,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdffs", "NetBSD FFS"},
{UU(0x49F48D82,0xB10E,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdlfs", "NetBSD LFS"},
{UU(0x49F48DAA,0xB10E,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdraid", "NetBSD RAID"},
{UU(0x2DB519C4,0xB10F,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdcat", "NetBSD Concatenated"},
{UU(0x2DB519EC,0xB10F,0x11DC,0xB99B,0x0019D1879648ULL), "nbsdcrypt", "NetBSD Encrypted"},
{UU(0xFE3A2A5D,0x4F32,0x41A7,0xB725,0xACCC3285A309ULL), "chromeoskern", "ChromeOS kernel"},
{UU(0x3CB8E202,0x3B7E,0x47DD,0x8A3C,0x7FF2A13CFCECULL), "chromeosroot", "ChromeOS rootfs"},
{UU(0x2E0A753D,0x9E48,0x43B0,0x8337,0xB15192CB1B5EULL), "chromeos", "ChromeOS future use"},
{UU(0x42465331,0x3BA3,0x10F1,0x802A,0x4861696B7521ULL), "haikubfs", "Haiku BFS"},
{UU(0x85D5E45E,0x237C,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsdboot", "MidnightBSD Boot"},
{UU(0x85D5E45A,0x237C,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsddata", "MidnightBSD Data"},
{UU(0x85D5E45B,0x237C,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsdswap", "MidnightBSD Swap"},
{UU(0x0394EF8B,0x237E,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsdufs", "MidnightBSD Unix File System"},
{UU(0x85D5E45C,0x237C,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsdvvm", "MidnightBSD Vinum volume manager"},
{UU(0x85D5E45D,0x237C,0x11E1,0xB4B3,0xE89A8F7FC3A7ULL), "midbsdzfs", "MidnightBSD ZFS"},
{UU(0x45B0969E,0x9B03,0x4F30,0xB4C6,0xB4B80CEFF106ULL), "cephjournal", "Ceph Journal"},
{UU(0x45B0969E,0x9B03,0x4F30,0xB4C6,0x5EC00CEFF106ULL), "cephcrypt", "Ceph dm-crypt Encrypted Journal"},
{UU(0x4FBD7E29,0x9D25,0x41B8,0xAFD0,0x062C0CEFF05DULL), "cephosd", "Ceph OSD"},
{UU(0x4FBD7E29,0x9D25,0x41B8,0xAFD0,0x5EC00CEFF05DULL), "cephcryptosd", "Ceph dm-crypt OSD"},
{UU(0x824CC7A0,0x36A8,0x11E3,0x890A,0x952519AD3F61ULL), "openbsd", "OpenBSD Data"},
{UU(0xCEF5A9AD,0x73BC,0x4601,0x89F3,0xCDEEEEE321A1ULL), "qnx6", "QNX6 Power-safe file system"},
{UU(0xC91818F9,0x8025,0x47AF,0x89D2,0xF030D7000C2CULL), "plan9", "Plan 9"},
};
static Flag flags[] = {
{ 0x0000000000000001ULL, 'S', "system" },
{ 0x0000000000000002ULL, 'E', "efi-hidden" },
{ 0x0000000000000004ULL, 'A', "active" },
{ 0x2000000000000000ULL, 'R', "read-only" },
{ 0x4000000000000000ULL, 'H', "hidden" },
{ 0x8000000000000000ULL, 'M', "nomount" },
{ 0, 0, nil }
};
static void initcrc32(void);
static u32int sumcrc32(u32int, uchar *, ulong);
static u32int getle32(void*);
static void putle32(void*, u32int);
static u64int getle64(void *);
static void putle64(void *, u64int);
static void uugen(uchar uuid[16]);
static Type* gettype(uchar uuid[16], char *name);
static int uufmt(Fmt*);
#pragma varargck type "U" uchar*
static int attrfmt(Fmt*);
#pragma varargck type "A" uvlong
static void rdpart(Edit*);
static void autopart(Edit*);
static void blankpart(Edit*);
static void cmdnamectl(Edit*);
static int blank;
static int dowrite;
static int file;
static int rdonly;
static int doauto;
static int printflag;
static int written;
static void cmdsum(Edit*, Part*, vlong, vlong);
static char *cmdadd(Edit*, char*, vlong, vlong);
static char *cmddel(Edit*, Part*);
static char *cmdext(Edit*, int, char**);
static char *cmdhelp(Edit*);
static char *cmdokname(Edit*, char*);
static char *cmdwrite(Edit*);
static void cmdprintctl(Edit*, int);
Edit edit = {
.add = cmdadd,
.del = cmddel,
.ext = cmdext,
.help = cmdhelp,
.okname = cmdokname,
.sum = cmdsum,
.write = cmdwrite,
.printctl = cmdprintctl,
.unit = "sector",
};
void
usage(void)
{
fprint(2, "usage: disk/edisk [-abfprw] [-s sectorsize] /dev/sdC0/data\n");
exits("usage");
}
void
main(int argc, char **argv)
{
vlong secsize;
fmtinstall('U', uufmt);
fmtinstall('A', attrfmt);
initcrc32();
secsize = 0;
ARGBEGIN{
case 'a':
doauto++;
break;
case 'b':
blank++;
break;
case 'f':
file++;
break;
case 'p':
printflag++;
break;
case 'r':
rdonly++;
break;
case 's':
secsize = atoi(ARGF());
break;
case 'v':
break;
case 'w':
dowrite++;
break;
}ARGEND;
if(argc != 1)
usage();
edit.disk = opendisk(argv[0], rdonly, file);
if(edit.disk == nil) {
fprint(2, "cannot open disk: %r\n");
exits("opendisk");
}
if(secsize != 0) {
edit.disk->secsize = secsize;
edit.disk->secs = edit.disk->size / secsize;
}
edit.unitsz = edit.disk->secsize;
edit.end = edit.disk->secs;
if(blank)
blankpart(&edit);
else
rdpart(&edit);
if(doauto)
autopart(&edit);
if(dowrite)
runcmd(&edit, "w");
if(printflag)
runcmd(&edit, "P");
if(dowrite || printflag)
exits(0);
runcmd(&edit, "p");
for(;;) {
fprint(2, ">>> ");
runcmd(&edit, getline(&edit));
}
}
typedef struct Block Block;
struct Block
{
Block *link;
Disk *disk;
uchar *save; /* saved backup data */
vlong addr;
uchar data[];
};
static Block *blocks;
static void*
getblock(Disk *disk, vlong addr)
{
Block *b;
if(addr < 0 || addr >= disk->secs)
abort();
for(b = blocks; b != nil; b = b->link){
if(b->addr == addr && b->disk == disk)
return b->data;
}
b = malloc(sizeof(Block) + 2*disk->secsize);
if(pread(disk->fd, b->data, disk->secsize, disk->secsize*addr) != disk->secsize){
sysfatal("getblock %llud: %r", addr);
return nil;
}
b->save = &b->data[disk->secsize];
memmove(b->save, b->data, disk->secsize);
b->addr = addr;
b->link = blocks;
b->disk = disk;
blocks = b;
return b->data;
}
static void
flushdisk(Disk *disk)
{
Block *b, *r;
if(disk->wfd < 0)
return;
for(b = blocks; b != nil; b = b->link){
if(b->disk != disk || memcmp(b->data, b->save, disk->secsize) == 0)
continue;
if(pwrite(disk->wfd, b->data, disk->secsize, b->addr*disk->secsize) != disk->secsize){
fprint(2, "error writing lba %llud: %r\n", b->addr);
goto Recover;
}
}
return;
Recover:
for(r = blocks; r != b; r = r->link){
if(r->disk != disk || memcmp(r->data, r->save, disk->secsize) == 0)
continue;
pwrite(disk->wfd, r->save, disk->secsize, r->addr*disk->secsize);
}
exits("recovered");
}
static u32int crc32tab[256];
static void
initcrc32(void)
{
u32int c;
int n, k;
for(n = 0; n < 256; n++){
c = n;
for(k = 0; k < 8; k++)
if((c & 1) != 0)
c = 0xedb88320 ^ c >> 1;
else
c >>= 1;
crc32tab[n] = c;
}
}
static u32int
sumcrc32(u32int c, uchar *buf, ulong len)
{
c = ~c;
while(len-- != 0)
c = crc32tab[(*buf++ ^ c) & 0xff] ^ c >> 8;
return ~c;
}
static u32int
getle32(void* v)
{
uchar *p;
p = v;
return (p[3]<<24)|(p[2]<<16)|(p[1]<<8)|p[0];
}
static void
putle32(void* v, u32int i)
{
uchar *p;
p = v;
p[0] = i;
p[1] = i>>8;
p[2] = i>>16;
p[3] = i>>24;
}
static u64int
getle64(void *v)
{
return ((u64int)getle32((uchar*)v + 4) << 32) | getle32(v);
}
static void
putle64(void *v, u64int i)
{
putle32(v, i);
putle32((uchar*)v + 4, i >> 32);
}
static void
uugen(uchar uu[16])
{
genrandom(uu, 16);
uu[7] = (uu[7] & ~0xF0) | 0x40;
uu[8] = (uu[8] & ~0xC0) | 0x80;
}
static int
uufmt(Fmt *fmt)
{
uchar *uu = va_arg(fmt->args, uchar*);
return fmtprint(fmt,
"%.2uX%.2uX%.2uX%.2uX-"
"%.2uX%.2uX-"
"%.2uX%.2uX-"
"%.2uX%.2uX-%.2uX%.2uX%.2uX%.2uX%.2uX%.2uX",
/* Data1 */ uu[3], uu[2], uu[1], uu[0],
/* Data2 */ uu[5], uu[4],
/* Data3 */ uu[7], uu[6],
/* Data4 */ uu[8], uu[9], uu[10], uu[11], uu[12], uu[13], uu[14], uu[15]);
}
static int
attrfmt(Fmt *fmt)
{
uvlong a = va_arg(fmt->args, uvlong);
char s[64+1], *p;
Flag *f;
p = s;
for(f=flags; f->c != '\0'; f++){
if(a & f->f)
*p = f->c;
else
*p = '-';
p++;
}
*p = '\0';
return fmtprint(fmt, "%s", s);
}
static Header*
readhdr(Disk *disk, vlong lba)
{
Header *hdr;
u32int crc;
int siz;
if(lba < 0)
lba += disk->secs;
hdr = getblock(disk, lba);
if(memcmp(hdr->sig, "EFI PART", 8) != 0)
return nil;
if(getle64(hdr->selflba) != lba)
return nil;
siz = getle32(hdr->hdrsiz);
if(siz < Headersiz || siz > disk->secsize)
return nil;
crc = getle32(hdr->hdrcrc);
putle32(hdr->hdrcrc, 0);
putle32(hdr->hdrcrc, sumcrc32(0, (uchar*)hdr, siz));
if(getle32(hdr->hdrcrc) != crc){
putle32(hdr->hdrcrc, crc);
return nil;
}
return hdr;
}
static void
partname(Edit *, Gptpart *p)
{
snprint(p->namebuf, sizeof(p->namebuf), "p%d", (int)(p - parts)+1);
p->name = p->namebuf;
}
static char*
readent(Edit *edit, Entry *ent, Gptpart *p)
{
int i;
memset(p, 0, sizeof(*p));
if(memcmp(ent->typeid, zeros, 16) == 0)
return nil;
p->type = gettype(ent->typeid, nil);
memmove(p->uuid, ent->partid, 16);
p->start = getle64(ent->firstlba);
p->end = getle64(ent->lastlba)+1;
p->attr = getle64(ent->attr);
for(i=0; i<nelem(p->label)-1; i++)
p->label[i] = ent->name[i*2] | (Rune)ent->name[i*2+1]<<8;
p->label[i] = 0;
partname(edit, p);
return addpart(edit, p);
}
static Entry*
getent(Disk *disk, vlong tablba, int entsize, int i)
{
int ent2blk;
uchar *blkp;
ent2blk = disk->secsize / entsize;
blkp = getblock(disk, tablba + (i/ent2blk));
blkp += entsize * (i%ent2blk);
return (Entry*)blkp;
}
static int
readtab(Edit *edit, Header *hdr)
{
int entries, entsize, i;
vlong tablba;
u32int crc;
Entry *ent;
char *err;
entries = getle32(hdr->entrycount);
entsize = getle32(hdr->entrysize);
if(entsize < Entrysiz || entsize > edit->disk->secsize)
return -1;
crc = 0;
tablba = getle64(hdr->tablba);
for(i=0; i<entries; i++){
ent = getent(edit->disk, tablba, entsize, i);
crc = sumcrc32(crc, (uchar*)ent, entsize);
}
if(getle32(hdr->tabcrc) != crc)
return -1;
nparts = entries;
parts = emalloc(nparts*sizeof(parts[0]));
partoff = getle64(hdr->firstlba);
partend = getle64(hdr->lastlba)+1;
edit->dot = partoff;
edit->end = partend;
for(i=0; i<nparts; i++){
ent = getent(edit->disk, tablba, entsize, i);
if((err = readent(edit, ent, &parts[i])) != nil)
fprint(2, "readtab: %s\n", err);
}
return 0;
}
static char*
checkhdr(Header *a, Header *b)
{
if(memcmp(a->sig, b->sig, sizeof(a->sig)) != 0)
return "signature";
if(memcmp(a->rev, b->rev, sizeof(a->rev)) != 0)
return "revision";
if(memcmp(a->hdrsiz, b->hdrsiz, sizeof(a->hdrsiz)) != 0)
return "header size";
if(memcmp(a->selflba, b->backlba, sizeof(a->selflba)) != 0
|| memcmp(a->backlba, b->selflba, sizeof(a->backlba)) != 0)
return "backup lba/self lba";
if(memcmp(a->firstlba, b->firstlba, sizeof(a->firstlba)) != 0)
return "first lba";
if(memcmp(a->lastlba, b->lastlba, sizeof(a->lastlba)) != 0)
return "last lba";
if(memcmp(a->devid, b->devid, sizeof(a->devid)) != 0)
return "device guid";
if(memcmp(a->entrycount, b->entrycount, sizeof(a->entrycount)) != 0)
return "entry count";
if(memcmp(a->entrysize, b->entrysize, sizeof(a->entrysize)) != 0)
return "entry size";
if(memcmp(a->tabcrc, b->tabcrc, sizeof(a->tabcrc)) != 0)
return "table checksum";
return nil;
}
static Header*
getbakhdr(Edit *edit, Header *bhdr)
{
vlong lba, blba, tlba;
Header *hdr;
int siz;
siz = getle32(bhdr->hdrsiz);
lba = getle64(bhdr->backlba);
if(!blank){
char *mismatch;
mismatch = "data";
hdr = readhdr(edit->disk, lba);
if(hdr != nil && (mismatch = checkhdr(bhdr, hdr)) == nil)
return hdr;
fprint(2, "backup header at lba %lld has mismatching %s, restoring.\n",
lba, mismatch);
}
hdr = getblock(edit->disk, lba);
memmove(hdr, bhdr, siz);
putle64(hdr->selflba, lba);
blba = getle64(bhdr->selflba);
putle64(hdr->backlba, blba);
if(lba <= blba)
tlba = lba+1;
else
tlba = partend;
putle64(hdr->tablba, tlba);
edit->changed = 1;
return hdr;
}
typedef struct Tentry Tentry;
struct Tentry {
uchar active; /* active flag */
uchar starth; /* starting head */
uchar starts; /* starting sector */
uchar startc; /* starting cylinder */
uchar type; /* partition type */
uchar endh; /* ending head */
uchar ends; /* ending sector */
uchar endc; /* ending cylinder */
uchar lba[4]; /* starting LBA */
uchar size[4]; /* size in sectors */
};
enum {
NTentry = 4,
Tentrysiz = 16,
};
static uchar*
readmbr(Disk *disk)
{
uchar *mbr, *magic;
Tentry *t;
int i;
mbr = getblock(disk, 0);
magic = &mbr[disk->secsize - 2];
if(magic[0] != 0x55 || magic[1] != 0xAA)
sysfatal("did not find master boot record");
for(i=0; i<NTentry; i++){
t = (Tentry*)&mbr[disk->secsize - 2 - (i+1)*Tentrysiz];
switch(t->type){
case 0xEE:
case 0xEF:
case 0x00:
continue;
}
sysfatal("dos partition table in use");
}
return mbr;
}
static void
rdpart(Edit *edit)
{
pmbr = readmbr(edit->disk);
if((phdr = readhdr(edit->disk, 1)) != nil && readtab(edit, phdr) == 0){
memmove(devid, phdr->devid, 16);
bhdr = getbakhdr(edit, phdr);
return;
}
if((bhdr = readhdr(edit->disk, -1)) != nil && readtab(edit, bhdr) == 0){
memmove(devid, bhdr->devid, 16);
phdr = getbakhdr(edit, bhdr);
return;
}
sysfatal("did not find partition table");
}
static Header*
inithdr(Disk *disk)
{
vlong tabsize, baklba;
Header *hdr;
tabsize = (Entrysiz*nparts + disk->secsize-1) / disk->secsize;
if(tabsize < 1)
tabsize = 1;
baklba = disk->secs-1;
partend = baklba - tabsize;
partoff = 2 + tabsize;
if(partoff >= partend)
sysfatal("disk too small for partition table");
hdr = getblock(disk, 1);
memset(hdr, 0, Headersiz);
memmove(hdr->sig, "EFI PART", 8);
putle32(hdr->rev, 0x10000);
putle32(hdr->hdrsiz, Headersiz);
putle32(hdr->hdrcrc, 0);
putle64(hdr->selflba, 1);
putle64(hdr->backlba, baklba);
putle64(hdr->firstlba, partoff);
putle64(hdr->lastlba, partend-1);
memmove(hdr->devid, devid, 16);
putle64(hdr->tablba, 2);
putle32(hdr->entrycount, nparts);
putle32(hdr->entrysize, Entrysiz);
putle32(hdr->tabcrc, 0);
return hdr;
}
static uchar*
initmbr(Disk *disk)
{
uchar *mbr, *magic;
u32int size;
Tentry *t;
mbr = getblock(disk, 0);
magic = &mbr[disk->secsize - 2];
magic[0] = 0x55;
magic[1] = 0xAA;
t = (Tentry*)&mbr[disk->secsize - 2 - NTentry*Tentrysiz];
memset(t, 0, NTentry * Tentrysiz);
t->type = 0xEE;
t->active = 0;
size = (disk->secs - 1) > 0xFFFFFFFF ? 0xFFFFFFFF : (disk->secs - 1);
putle32(t->lba, 1);
putle32(t->size, size);
t->starth = 0;
t->startc = 0;
t->starts = 1;
t->endh = disk->h-1;
t->ends = (disk->s & 0x3F) | (((disk->c-1)>>2) & 0xC0);
t->endc = disk->c-1;
return mbr;
}
static void
blankpart(Edit *edit)
{
nparts = 128;
parts = emalloc(nparts*sizeof(parts[0]));
uugen(devid);
pmbr = initmbr(edit->disk);
phdr = inithdr(edit->disk);
bhdr = getbakhdr(edit, phdr);
edit->dot = partoff;
edit->end = partend;
edit->changed = 1;
}
static void
writeent(Entry *ent, Gptpart *p)
{
int i;
if(p->type == nil)
return;
memmove(ent->typeid, p->type->uuid, 16);
memmove(ent->partid, p->uuid, 16);
putle64(ent->firstlba, p->start);
putle64(ent->lastlba, p->end-1);
putle64(ent->attr, p->attr);
for(i=0; i<nelem(ent->name)/2; i++){
ent->name[i*2] = p->label[i] & 0xFF;
ent->name[i*2+1] = p->label[i] >> 8;
}
}
static void
writetab(Edit *edit, Header *hdr)
{
int hdrsize, entsize, i;
vlong tablba;
u32int crc;
Entry *ent;
crc = 0;
entsize = getle32(hdr->entrysize);
tablba = getle64(hdr->tablba);
for(i=0; i<nparts; i++){
ent = getent(edit->disk, tablba, entsize, i);
memset(ent, 0, entsize);
writeent(ent, &parts[i]);
crc = sumcrc32(crc, (uchar*)ent, entsize);
}
hdrsize = getle32(hdr->hdrsiz);
putle32(hdr->tabcrc, crc);
putle32(hdr->hdrcrc, 0);
putle32(hdr->hdrcrc, sumcrc32(0, (uchar*)hdr, hdrsize));
}
static char*
cmdwrite(Edit *edit)
{
writetab(edit, phdr);
writetab(edit, bhdr);
flushdisk(edit->disk);
cmdprintctl(edit, edit->disk->ctlfd);
return nil;
}
static char*
newpart(Edit *edit, Gptpart *p, vlong start, vlong end, Type *type, uvlong attr)
{
if(end <= partoff || start >= partend)
return "partition overlaps partition table";
if(start < partoff)
start = partoff;
memset(p, 0, sizeof(*p));
p->type = type;
p->attr = attr;
p->start = start;
p->end = end;
uugen(p->uuid);
runesnprint(p->label, nelem(p->label), "%s", p->type->desc);
partname(edit, p);
return addpart(edit, p);
}
static void
autopart1(Edit *edit, Type *type, uvlong attr, vlong maxsize)
{
vlong start, bigstart, bigsize;
Gptpart *p;
int i;
maxsize /= edit->disk->secsize;
bigsize = 0;
bigstart = 0;
start = partoff;
for(i=0; i<edit->npart; i++){
p = (Gptpart*)edit->part[i];
if(p->type == type)
return;
if(p->start > start && (p->start - start) > bigsize){
bigsize = p->start - start;
bigstart = start;
}
start = p->end;
}
if(partend > start && (partend - start) > bigsize){
bigsize = partend - start;
bigstart = start;
}
if(bigsize < 1) {
fprint(2, "couldn't find space for plan 9 partition\n");
return;
}
if(maxsize && bigsize > maxsize)
bigsize = maxsize;
for(i=0; i<nparts; i++){
p = &parts[i];
if(p->type == nil){
newpart(edit, p, bigstart, bigstart+bigsize, type, attr);
return;
}
}
fprint(2, "couldn't find free slot for %s partition\n", type->name);
}
static void
autopart(Edit *edit)
{
autopart1(edit, gettype(nil, "esp"), 4, 550*MB);
autopart1(edit, gettype(nil, "plan9"), 0, 0);
}
typedef struct Name Name;
struct Name {
char *name;
Name *link;
};
static Name *namelist;
static void
plan9print(Gptpart *p)
{
int i, ok;
char *name, *vname;
Name *n;
char *sep;
vname = p->type->name;
if(vname==nil || strcmp(vname, "")==0) {
p->ctlname = "";
return;
}
/* avoid names like plan90 */
i = strlen(vname) - 1;
if(vname[i] >= '0' && vname[i] <= '9')
sep = ".";
else
sep = "";
i = 0;
name = emalloc(strlen(vname)+10);
sprint(name, "%s", vname);
do {
ok = 1;
for(n=namelist; n; n=n->link) {
if(strcmp(name, n->name) == 0) {
i++;
sprint(name, "%s%s%d", vname, sep, i);
ok = 0;
}
}
} while(ok == 0);
p->ctlname = name;
n = emalloc(sizeof(*n));
n->name = name;
n->link = namelist;
namelist = n;
}
static void
freenamelist(void)
{
Name *n, *next;
for(n=namelist; n; n=next) {
next = n->link;
free(n->name);
free(n);
}
namelist = nil;
}
static void
cmdprintctl(Edit *edit, int ctlfd)
{
int i;
freenamelist();
for(i=0; i<edit->npart; i++)
plan9print((Gptpart*)edit->part[i]);
ctldiff(edit, ctlfd);
}
static char*
cmdokname(Edit*, char *name)
{
if(name[0] != 'p' || atoi(name+1) <= 0)
return "name must be pN";
return nil;
}
static void
cmdsum(Edit *edit, Part *vp, vlong a, vlong b)
{
char *name, *type, *unit;
Rune *label;
Gptpart *p;
uvlong attr;
vlong s, d;
if((p = (Gptpart*)vp) == nil){
if(a < partoff)
a = partoff;
if(a >= b)
return;
name = "empty";
type = "";
attr = 0;
label = L"";
} else {
name = p->name;
type = p->type->name;
attr = p->attr;
label = p->label;
}
s = (b - a)*edit->disk->secsize;
if(s >= 1*TB){
unit = "TB";
d = TB;
}else if(s >= 1*GB){
unit = "GB";
d = GB;
}else if(s >= 1*MB){
unit = "MB";
d = MB;
}else if(s >= 1*KB){
unit = "KB";
d = KB;
}else{
unit = "B ";
d = 1;
}
print("%A %-6s %*llud %*llud (%lld.%.2d %s) %8s \"%S\"\n",
attr, name, edit->disk->width, a, edit->disk->width, b,
s/d, (int)(((s%d)*100)/d), unit, type, label);
}
static char*
cmdadd(Edit *edit, char *name, vlong start, vlong end)
{
int slot;
slot = atoi(name+1)-1;
if(slot < 0 || slot >= nparts)
return "partition number out of range";
return newpart(edit, &parts[slot], start, end, gettype(nil, "plan9"), 0);
}
static char*
cmddel(Edit *edit, Part *p)
{
memset((Gptpart*)p, 0, sizeof(Gptpart));
return delpart(edit, p);
}
static char *help =
"t name [type] - set partition type\n"
"f name [+-flags] - set partition attributes\n"
"l name [label] - set partition label\n";
static char*
cmdhelp(Edit*)
{
print("%s\n", help);
return nil;
}
static char*
cmdflag(Edit *edit, int na, char **a)
{
Gptpart *p;
char *s, op;
Flag *f;
if(na < 2)
return "args";
if((p = (Gptpart*)findpart(edit, a[1])) == nil)
return "unknown partition";
if(na == 2){
for(;;){
fprint(2, "set attibutes [? for list]: ");
s = getline(edit);
if(s[0] != '?')
break;
for(f = flags; f->c != '\0'; f++)
fprint(2, "%#.16llux %c - %s\n", f->f, f->c, f->desc);
}
} else {
s = a[2];
}
op = '+';
for(; *s != '\0'; s++){
switch(*s){
case '+':
case '-':
op = *s;
case ' ':
continue;
}
for(f = flags; f->c != '\0'; f++)
if(f->c == *s)
break;
if(f->c == '\0')
return "unknown flag";
switch(op){
case '+':
p->attr |= f->f;
break;
case '-':
p->attr &= ~f->f;
break;
}
p->changed = 1;
edit->changed = 1;
}
return nil;
}
static Type*
gettype(uchar uuid[16], char *name)
{
Type *t;
if(name != nil){
for(t = types; t->name != nil; t++)
if(strcmp(name, t->name) == 0)
return t;
uugen(uuid);
} else {
for(t = types; t->name != nil; t++)
if(memcmp(t->uuid, uuid, 16) == 0)
return t;
}
if(t >= &types[nelem(types)-1])
sysfatal("too many partition types");
memmove(t->uuid, uuid, 16);
t->name = smprint("type%.2uX%.2uX%.2uX%.2uX", uuid[3], uuid[2], uuid[1], uuid[0]);
t->desc = name != nil ? estrdup(name) : "";
return t;
}
static char*
cmdtype(Edit *edit, int nf, char **f)
{
uchar uuid[16];
Gptpart *p;
char *q;
Type *t;
if(nf < 2)
return "args";
if((p = (Gptpart*)findpart(edit, f[1])) == nil)
return "unknown partition";
if(nf == 2) {
for(;;) {
fprint(2, "new partition type [? for list]: ");
q = getline(edit);
if(q[0] != '?')
break;
for(t = types+1; t->name != nil; t++)
fprint(2, "%U %-15s %s\n", t->uuid, t->name, t->desc);
}
} else
q = f[2];
if(q[0] == '\0' || (t = gettype(uuid, q)) == p->type)
return nil;
p->type = t;
memset(p->label, 0, sizeof(p->label));
runesnprint(p->label, nelem(p->label), "%s", t->desc);
p->changed = 1;
edit->changed = 1;
return nil;
}
static char*
cmdlabel(Edit *edit, int nf, char **f)
{
Gptpart *p;
char *q;
if(nf < 2)
return "args";
if((p = (Gptpart*)findpart(edit, f[1])) == nil)
return "unknown partition";
if(nf == 2) {
fprint(2, "new label: ");
q = getline(edit);
} else
q = f[2];
memset(p->label, 0, sizeof(p->label));
runesnprint(p->label, nelem(p->label), "%s", q);
p->changed = 1;
edit->changed = 1;
return nil;
}
static char*
cmdext(Edit *edit, int nf, char **f)
{
switch(f[0][0]) {
case 't':
return cmdtype(edit, nf, f);
case 'f':
return cmdflag(edit, nf, f);
case 'l':
return cmdlabel(edit, nf, f);
default:
return "unknown command";
}
}