tAdd UFS2 support. - plan9port - [fork] Plan 9 from user space
(HTM) git clone git://src.adamsgaard.dk/plan9port
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---
(DIR) commit e060bc52275a6d7eff5238fba5ba592004da3eb3
(DIR) parent 8ecefa411d235498ed036c6e173f62547a2e5dd4
(HTM) Author: rsc <devnull@localhost>
Date: Thu, 11 Aug 2005 16:45:39 +0000
Add UFS2 support.
Diffstat:
M src/libdiskfs/ffs.c | 155 ++++++++++++++++++++-----------
M src/libdiskfs/ffs.h | 165 +++++++++++++++++++++----------
M src/libdiskfs/mkfile | 2 ++
3 files changed, 219 insertions(+), 103 deletions(-)
---
(DIR) diff --git a/src/libdiskfs/ffs.c b/src/libdiskfs/ffs.c
t@@ -6,6 +6,8 @@
#include <diskfs.h>
#include "ffs.h"
+#define BADBNO ((u64int)~0ULL)
+
#define checkcg 0
#define debug 0
t@@ -57,7 +59,7 @@ error:
}
static Cgblk*
-ffscylgrp(Ffs *fs, int i, Block **pb)
+ffscylgrp(Ffs *fs, u32int i, Block **pb)
{
Block *b;
Cgblk *cg;
t@@ -82,6 +84,7 @@ static int
ffssync(Fsys *fsys)
{
int i;
+ int off[] = { SBOFF, SBOFF2, SBOFFPIGGY };
Block *b, *cgb;
Cgblk *cgblk;
Cylgrp *cg;
t@@ -95,12 +98,18 @@ ffssync(Fsys *fsys)
/*
* Read super block.
*/
- if((b = diskread(disk, SBSIZE, SBOFF)) == nil)
- goto error;
- fsblk = (Fsblk*)b->data;
- if(checkfsblk(fsblk) < 0)
- goto error;
+ for(i=0; i<nelem(off); i++){
+ if((b = diskread(disk, SBSIZE, off[i])) == nil)
+ goto error;
+ fsblk = (Fsblk*)b->data;
+ fprint(2, "offset of magic: %d\n", offsetof(Fsblk, magic));
+ if((fs->ufs = checkfsblk(fsblk)) > 0)
+ goto okay;
+ blockput(b);
+ }
+ goto error;
+okay:
fs->blocksize = fsblk->blocksize;
fs->nblock = (fsblk->nfrag+fsblk->fragsperblock-1) / fsblk->fragsperblock;
fs->fragsize = fsblk->fragsize;
t@@ -111,21 +120,31 @@ ffssync(Fsys *fsys)
fs->nfrag = fsblk->nfrag;
fs->ndfrag = fsblk->ndfrag;
- fs->blockspergroup = (u64int)fsblk->cylspergroup *
- fsblk->secspercyl * BYTESPERSEC / fsblk->blocksize;
+ /*
+ * used to use
+ * fs->blockspergroup = (u64int)fsblk->_cylspergroup *
+ * fsblk->secspercyl * BYTESPERSEC / fsblk->blocksize;
+ * for UFS1, but this should work for both UFS1 and UFS2
+ */
+ fs->blockspergroup = (u64int)fsblk->fragspergroup / fsblk->fragsperblock;
fs->ncg = fsblk->ncg;
fsys->blocksize = fs->blocksize;
fsys->nblock = fs->nblock;
- if(0) fprint(2, "ffs %d %d-byte blocks, %d cylinder groups\n",
+ if(debug) fprint(2, "ffs %lld %d-byte blocks, %d cylinder groups\n",
fs->nblock, fs->blocksize, fs->ncg);
+ if(debug) fprint(2, "\tinospergroup %d perblock %d blockspergroup %lld\n",
+ fs->inospergroup, fs->inosperblock, fs->blockspergroup);
if(fs->cg == nil)
fs->cg = emalloc(fs->ncg*sizeof(Cylgrp));
for(i=0; i<fs->ncg; i++){
cg = &fs->cg[i];
- cg->bno = fs->blockspergroup*i + fsblk->cgoffset * (i & ~fsblk->cgmask);
+ if(fs->ufs == 2)
+ cg->bno = (u64int)fs->blockspergroup*i;
+ else
+ cg->bno = fs->blockspergroup*i + fsblk->_cgoffset * (i & ~fsblk->_cgmask);
cg->cgblkno = cg->bno + fsblk->cfragno/fs->fragsperblock;
cg->ibno = cg->bno + fsblk->ifragno/fs->fragsperblock;
cg->dbno = cg->bno + fsblk->dfragno/fs->fragsperblock;
t@@ -172,12 +191,20 @@ ffsclose(Fsys *fsys)
static int
checkfsblk(Fsblk *super)
{
- if(super->magic != FSMAGIC){
- werrstr("bad super block");
- return -1;
+fprint(2, "ffs magic 0x%ux\n", super->magic);
+ if(super->magic == FSMAGIC){
+ super->time = super->_time;
+ super->nfrag = super->_nfrag;
+ super->ndfrag = super->_ndfrag;
+ super->flags = super->_flags;
+ return 1;
+ }
+ if(super->magic == FSMAGIC2){
+ return 2;
}
- return 0;
+ werrstr("bad super block");
+ return -1;
}
static int
t@@ -198,11 +225,10 @@ int nskipx;
static Block*
ffsblockread(Fsys *fsys, u64int bno)
{
- u32int i, o;
+ int i, o;
u8int *fmap;
int frag, fsize, avail;
Block *b;
-// Cylgrp *cg;
Cgblk *cgblk;
Ffs *fs;
t@@ -211,10 +237,6 @@ ffsblockread(Fsys *fsys, u64int bno)
o = bno % fs->blockspergroup;
if(i >= fs->ncg)
return nil;
-// cg = &fs->cg[i];
-
-// if(o >= cg->nblock)
-// return nil;
if((cgblk = ffscylgrp(fs, i, &b)) == nil)
return nil;
t@@ -257,7 +279,7 @@ nskipx++;
}
static Block*
-ffsdatablock(Ffs *fs, u32int bno, int size)
+ffsdatablock(Ffs *fs, u64int bno, int size)
{
int fsize;
u64int diskaddr;
t@@ -290,25 +312,26 @@ ffsdatablock(Ffs *fs, u32int bno, int size)
return b;
}
-static u32int
-ifetch(Ffs *fs, u32int bno, u32int off)
+static u64int
+ifetch(Ffs *fs, u64int bno, u32int off)
{
- u32int *a;
Block *b;
- if(bno == ~0)
- return ~0;
+ if(bno == BADBNO)
+ return BADBNO;
b = ffsdatablock(fs, bno, fs->blocksize);
if(b == nil)
- return ~0;
- a = (u32int*)b->data;
- bno = a[off];
+ return BADBNO;
+ if(fs->ufs == 2)
+ bno = ((u64int*)b->data)[off];
+ else
+ bno = ((u32int*)b->data)[off];
blockput(b);
return bno;
}
-static u32int
-ffsfileblockno(Ffs *fs, Inode *ino, u32int bno)
+static u64int
+ffsfileblockno(Ffs *fs, Inode *ino, u64int bno)
{
int ppb;
t@@ -329,16 +352,15 @@ ffsfileblockno(Ffs *fs, Inode *ino, u32int bno)
if(bno/ppb/ppb/ppb == 0) /* bno < ppb*ppb*ppb w/o overflow */
return ifetch(fs, ifetch(fs, ifetch(fs, ino->ib[2], bno/ppb/ppb), (bno/ppb)%ppb), bno%ppb);
- bno -= ppb*ppb*ppb;
- fprint(2, "ffsfileblock %lud: way too big\n", (ulong)bno+NDADDR);
- return ~0;
+ fprint(2, "ffsfileblock %llud: way too big\n", bno+NDADDR+ppb+ppb*ppb);
+ return BADBNO;
}
static Block*
-ffsfileblock(Ffs *fs, Inode *ino, u32int bno, int size)
+ffsfileblock(Ffs *fs, Inode *ino, u64int bno, int size)
{
- u32int b;
+ u64int b;
b = ffsfileblockno(fs, ino, bno);
if(b == ~0)
t@@ -365,7 +387,33 @@ byte2u32(uchar *p)
return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
}
-static u64int iaddr;
+static u64int lastiaddr; /* debugging */
+
+static void
+inode1to2(Inode1 *i1, Inode *i2)
+{
+ int i;
+
+ memset(i2, 0, sizeof *i2);
+ i2->mode = i1->mode;
+ i2->nlink = i1->nlink;
+ i2->size = i1->size;
+ i2->atime = i1->atime;
+ i2->atimensec = i1->atimensec;
+ i2->mtime = i1->mtime;
+ i2->mtimensec = i1->mtimensec;
+ i2->ctime = i1->ctime;
+ i2->ctimensec = i1->ctimensec;
+ for(i=0; i<NDADDR; i++)
+ i2->db[i] = i1->db[i];
+ for(i=0; i<NIADDR; i++)
+ i2->ib[i] = i1->ib[i];
+ i2->flags = i1->flags;
+ i2->nblock = i1->nblock;
+ i2->gen = i1->gen;
+ i2->uid = i1->uid;
+ i2->gid = i1->gid;
+}
static Nfs3Status
handle2ino(Ffs *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
t@@ -373,8 +421,10 @@ handle2ino(Ffs *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
int i;
u32int ioff;
u32int inum;
+ u64int iaddr;
Block *b;
Cylgrp *cg;
+ Inode1 ino1;
if(h->len != 4)
return Nfs3ErrBadHandle;
t@@ -390,20 +440,21 @@ handle2ino(Ffs *fs, Nfs3Handle *h, u32int *pinum, Inode *ino)
if(i >= fs->ncg)
return Nfs3ErrBadHandle;
cg = &fs->cg[i];
-/*
- if(ioff >= cg->nino)
- return Nfs3ErrBadHandle;
-*/
- if(debug) print("cg->ibno %d...", cg->ibno);
- if((b = diskread(fs->disk, fs->blocksize,
- (cg->ibno+ioff/fs->inosperblock)*(vlong)fs->blocksize)) == nil)
+ if(debug) print("cg->ibno %lld ufs %d...", cg->ibno, fs->ufs);
+ iaddr = (cg->ibno+ioff/fs->inosperblock)*(vlong)fs->blocksize;
+ ioff = ioff%fs->inosperblock;
+ if((b = diskread(fs->disk, fs->blocksize, iaddr)) == nil)
return Nfs3ErrIo;
- iaddr = (cg->ibno+ioff/fs->inosperblock)*(vlong)fs->blocksize
- + (ioff%fs->inosperblock)*sizeof(Inode);
- *ino = ((Inode*)b->data)[ioff%fs->inosperblock];
+ if(fs->ufs == 2){
+ *ino = ((Inode*)b->data)[ioff];
+ lastiaddr = iaddr+ioff*sizeof(Inode);
+ }else{
+ ino1 = ((Inode1*)b->data)[ioff];
+ inode1to2(&ino1, ino);
+ lastiaddr = iaddr+ioff*sizeof(Inode1);
+ }
blockput(b);
-
return Nfs3Ok;
}
t@@ -717,7 +768,7 @@ ffsreaddir(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count, u64int cook
static u64int
ffsxfileblock(Fsys *fsys, Nfs3Handle *h, u64int offset)
{
- u32int bno;
+ u64int bno;
Inode ino;
Nfs3Status ok;
Ffs *fs;
t@@ -727,8 +778,8 @@ ffsxfileblock(Fsys *fsys, Nfs3Handle *h, u64int offset)
nfs3errstr(ok);
return 0;
}
- if(offset == 1)
- return iaddr;
+ if(offset == 1) /* clumsy hack for debugging */
+ return lastiaddr;
if(offset >= ino.size){
werrstr("beyond end of file");
return 0;
t@@ -820,7 +871,7 @@ ffsreadlink(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, char **link)
len = ino.size;
if(ino.nblock != 0){
- /* BUG: assumes symlink fits in one block */
+ /* assumes symlink fits in one block */
b = ffsfileblock(fs, &ino, 0, len);
if(b == nil)
return Nfs3ErrIo;
(DIR) diff --git a/src/libdiskfs/ffs.h b/src/libdiskfs/ffs.h
t@@ -19,8 +19,10 @@
typedef struct Cgblk Cgblk;
typedef struct Cylgrp Cylgrp;
typedef struct Cylsum Cylsum;
+typedef struct Cylsumtotal Cylsumtotal;
typedef struct Ffs Ffs;
typedef struct Fsblk Fsblk;
+typedef struct Inode1 Inode1;
typedef struct Inode Inode;
typedef struct Dirent Dirent;
t@@ -30,9 +32,13 @@ enum
/* constants for Fsblk */
FSMAXMNTLEN = 512,
- FSNOCSPTRS = 128 / sizeof(void*) - 3,
+ FSMAXMNTLEN2 = 468,
+ FSMAXVOLLEN = 32, /* UFS2 */
+ FSNOCSPTRSLEN = 128-12,
+ FSNOCSPTRSLEN2 = 128-16, /* UFS2 */
FSMAXSNAP = 20,
FSMAGIC = 0x011954,
+ FSMAGIC2 = 0x19540119,
FSCHECKSUM = 0x7c269d38,
/* Fsblk.inodefmt */
t@@ -45,6 +51,8 @@ enum
/* offset and size of first super block */
SBOFF = BBOFF+BBSIZE,
+ SBOFF2 = BBOFF+65536, /* UFS2 */
+ SBOFFPIGGY = BBOFF+262144, /* UFS2 */
SBSIZE = 8192,
/* minimum block size */
t@@ -60,6 +68,7 @@ enum
ROOTINODE = 2,
WHITEOUT = 1,
+ NXADDR = 2, /* UFS2 */
NDADDR = 12,
NIADDR = 3,
t@@ -102,6 +111,17 @@ struct Cylsum
u32int nffree;
};
+struct Cylsumtotal
+{
+ u64int ndir;
+ u64int nbfree;
+ u64int nifree;
+ u64int nffree;
+ u64int numclusters;
+ u64int unused[3];
+};
+
+/* Fields beginning with underscore are deprecated in UFS2 */
struct Fsblk
{
u32int unused0;
t@@ -110,11 +130,11 @@ struct Fsblk
daddr_t cfragno; /* fragment address if cylinder block in file system */
daddr_t ifragno; /* fragment offset of inode blocks in file system */
daddr_t dfragno; /* fragment offset of data blocks in cg */
- u32int cgoffset; /* block (maybe fragment?) offset of Cgblk in cylinder */
- u32int cgmask;
- time_t time;
- u32int nfrag; /* number of blocks in fs * fragsperblock */
- u32int ndfrag;
+ u32int _cgoffset; /* block (maybe fragment?) offset of Cgblk in cylinder */
+ u32int _cgmask;
+ time_t _time;
+ u32int _nfrag; /* number of blocks in fs * fragsperblock */
+ u32int _ndfrag;
u32int ncg; /* number of cylinder groups in fs */
u32int blocksize; /* block size in fs */
u32int fragsize; /* frag size in fs */
t@@ -130,58 +150,73 @@ struct Fsblk
u32int maxbpg;
u32int fragshift;
u32int fsbtodbshift;
- u32int sbsize; /* size of super block */
+ u32int sbsize; /* size of super block */
u32int unused2; /* more stuff we don't use ... */
u32int unused3;
u32int nindir;
u32int inosperblock; /* inodes per block */
- u32int nspf;
+ u32int _nspf;
u32int optim;
- u32int npsect;
- u32int interleave;
- u32int trackskew;
+ u32int _npsect;
+ u32int _interleave;
+ u32int _trackskew;
u32int id[2];
- daddr_t csaddr; /* blk addr of cyl grp summary area */
- u32int cssize; /* size of cyl grp summary area */
- u32int cgsize; /* cylinder group size */
- u32int trackspercyl; /* tracks per cylinder */
- u32int secspertrack; /* sectors per track */
- u32int secspercyl; /* sectors per cylinder */
- u32int ncyl; /* cylinders in fs */
- u32int cylspergroup; /* cylinders per group */
+ daddr_t _csaddr; /* blk addr of cyl grp summary area */
+ u32int cssize; /* size of cyl grp summary area */
+ u32int cgsize; /* cylinder group size */
+ u32int _trackspercyl; /* tracks per cylinder */
+ u32int _secspertrack; /* sectors per track */
+ u32int _secspercyl; /* sectors per cylinder */
+ u32int _ncyl; /* cylinders in fs */
+ u32int _cylspergroup; /* cylinders per group */
u32int inospergroup; /* inodes per group */
u32int fragspergroup; /* data blocks per group * fragperblock */
- Cylsum cstotal; /* more unused... */
+ Cylsum _cstotal; /* more unused... */
u8int fmod;
u8int clean;
u8int ronly;
- u8int flags;
- char fsmnt[FSMAXMNTLEN];
+ u8int _flags;
+ /* char fsmnt[512]; in UFS1 */
+ char fsmnt[FSMAXMNTLEN2];
+ char volname[FSMAXVOLLEN];
+ u64int swuid;
+ u32int pad;
u32int cgrotor;
- void* ocsp[FSNOCSPTRS];
- u8int* contigdirs;
- Cylsum* csp;
- u32int* maxcluster;
- u32int cpc;
- u16int opostbl[16][8];
+ uchar ocsp[FSNOCSPTRSLEN]; /* last 4 bytes is contigdirs in UFS2 */
+ u32int contigdirs; /* csp in UFS2 */
+ u32int csp; /* maxcluster in UFS2 */
+ u32int maxcluster; /* active in UFS2 */
+ u32int _cpc;
+ /* u16int opostbl[16][8]; in UFS1 */
+ u32int maxbsize;
+ u64int spare64[17];
+ u64int sblockloc;
+ Cylsumtotal cstotal;
+ u64int time;
+ u64int nfrag;
+ u64int ndfrag;
+ u64int csaddr;
+ u64int pendingblocks;
+ u32int pendinginodes;
u32int snapinum[FSMAXSNAP];
u32int avgfilesize;
u32int avgfpdir;
- u32int sparecon[26];
- u32int pendingblocks;
- u32int pendinginodes;
+ /* u32int sparecon[26], pendingblocks, pendinginodes; in UFS1 */
+ u32int savecgsize;
+ u32int sparecon[26];
+ u32int flags;
u32int contigsumsize;
u32int maxsymlinklen;
- u32int inodefmt; /* format of on-disk inodes */
+ u32int _inodefmt; /* format of on-disk inodes */
u64int maxfilesize; /* maximum representable file size */
u64int qbmask;
u64int qfmask;
u32int state;
- u32int postblformat;
- u32int nrpos;
- u32int postbloff;
- u32int rotbloff;
- u32int magic; /* FS_MAGIC */
+ u32int _postblformat;
+ u32int _nrpos;
+ u32int _postbloff;
+ u32int _rotbloff;
+ u32int magic; /* FSMAGIC or FSMAGIC2 */
};
/*
t@@ -190,12 +225,12 @@ struct Fsblk
struct Cgblk
{
u32int unused0;
- u32int magic; /* CGMAGIC */
+ u32int magic; /* CGMAGIC */
u32int time; /* time last written */
- u32int num; /* we are cg #cgnum */
+ u32int num; /* we are cg #cgnum */
u16int ncyl; /* number of cylinders in gp */
- u16int nino; /* number of inodes */
- u32int nfrag; /* number of fragments */
+ u16int nino; /* number of inodes */
+ u32int nfrag; /* number of fragments */
Cylsum csum;
u32int rotor;
u32int frotor;
t@@ -215,16 +250,16 @@ struct Cgblk
struct Cylgrp
{
/* these are block numbers not fragment numbers */
- u32int bno; /* disk block address of start of cg */
- u32int ibno; /* disk block address of first inode */
- u32int dbno; /* disk block address of first data */
- u32int cgblkno;
+ u64int bno; /* disk block address of start of cg */
+ u64int ibno; /* disk block address of first inode */
+ u64int dbno; /* disk block address of first data */
+ u64int cgblkno;
};
/*
* this is the on-disk structure
*/
-struct Inode
+struct Inode1
{
u16int mode;
u16int nlink;
t@@ -247,6 +282,33 @@ struct Inode
u32int spare[2];
};
+struct Inode
+{
+ u16int mode;
+ u16int nlink;
+ u32int uid;
+ u32int gid;
+ u32int blksize;
+ u64int size;
+ u64int nblock;
+ u64int atime;
+ u64int mtime;
+ u64int ctime;
+ u64int btime;
+ u32int atimensec;
+ u32int mtimensec;
+ u32int ctimensec;
+ u32int btimensec;
+ u32int gen;
+ u32int kernflags;
+ u32int flags;
+ u32int extsize;
+ u64int ext[NXADDR];
+ u64int db[NDADDR];
+ u64int ib[NIADDR];
+ u64int spare[3];
+};
+
struct Dirent
{
u32int ino;
t@@ -261,17 +323,18 @@ struct Dirent
*/
struct Ffs
{
+ int ufs;
int blocksize;
- int nblock;
+ u64int nblock;
int fragsize;
int fragsperblock;
int inosperblock;
- int blockspergroup;
- int fragspergroup;
+ u64int blockspergroup;
+ u64int fragspergroup;
int inospergroup;
- u32int nfrag;
- u32int ndfrag;
+ u64int nfrag;
+ u64int ndfrag;
int ncg;
Cylgrp *cg;
(DIR) diff --git a/src/libdiskfs/mkfile b/src/libdiskfs/mkfile
t@@ -29,3 +29,5 @@ CFLAGS=$CFLAGS
%.acid: %.$O %.c
$CC $CFLAGS -a $stem.c >$stem.acid
+
+ffs.$O: ffs.h