tadd very big file support (David Swasey) - plan9port - [fork] Plan 9 from user space
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---
DIR commit b109049fbdd219b9fe366644d0979a8cbf4e6607
DIR parent 8f57d0d0d9117936fb86d1ec182879c3b5a4f713
HTML Author: rsc <devnull@localhost>
Date: Sun, 25 Mar 2007 17:35:08 +0000
add very big file support (David Swasey)
Diffstat:
M src/libdiskfs/ext2.c | 48 +++++++++++++++++++++-----------
M src/libdiskfs/ext2.h | 4 ++--
2 files changed, 34 insertions(+), 18 deletions(-)
---
DIR diff --git a/src/libdiskfs/ext2.c b/src/libdiskfs/ext2.c
t@@ -167,7 +167,7 @@ ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
int ppb;
Block *b;
u32int *a;
- u32int obno;
+ u32int obno, pbno;
obno = bno;
if(bno < NDIRBLOCKS){
t@@ -185,7 +185,7 @@ ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[bno%ppb];
+ bno = a[bno];
blockput(b);
return ext2datablock(fs, bno, size);
}
t@@ -197,13 +197,14 @@ ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[(bno/ppb)%ppb];
+ pbno = a[bno/ppb];
+ bno = bno%ppb;
blockput(b);
- b = ext2datablock(fs, bno, fs->blocksize);
+ b = ext2datablock(fs, pbno, fs->blocksize);
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[bno%ppb];
+ bno = a[bno];
blockput(b);
return ext2datablock(fs, bno, size);
}
t@@ -215,19 +216,21 @@ ext2fileblock(Ext2 *fs, Inode *ino, u32int bno, int size)
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[(bno/(ppb*ppb))%ppb];
+ pbno = a[bno/(ppb*ppb)];
+ bno = bno%(ppb*ppb);
blockput(b);
- b = ext2datablock(fs, bno, fs->blocksize);
+ b = ext2datablock(fs, pbno, fs->blocksize);
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[(bno/ppb)%ppb];
+ pbno = a[bno/ppb];
+ bno = bno%ppb;
blockput(b);
- b = ext2datablock(fs, bno, fs->blocksize);
+ b = ext2datablock(fs, pbno, fs->blocksize);
if(b == nil)
return nil;
a = (u32int*)b->data;
- bno = a[bno%ppb];
+ bno = a[bno];
blockput(b);
return ext2datablock(fs, bno, size);
}
t@@ -351,6 +354,17 @@ ext2root(Fsys *fsys, Nfs3Handle *h)
return Nfs3Ok;
}
+static u64int
+inosize(Inode* ino)
+{
+ u64int size;
+
+ size = ino->size;
+ if((ino->mode&IFMT)==IFREG)
+ size |= (u64int)ino->diracl << 32;
+ return size;
+}
+
static Nfs3Status
ino2attr(Ext2 *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
{
t@@ -388,8 +402,8 @@ ino2attr(Ext2 *fs, Inode *ino, u32int inum, Nfs3Attr *attr)
attr->nlink = ino->nlink;
attr->uid = ino->uid;
attr->gid = ino->gid;
- attr->size = ino->size;
- attr->used = ino->nblock*fs->blocksize;
+ attr->size = inosize(ino);
+ attr->used = (u64int)ino->nblock*fs->blocksize;
if(attr->type==Nfs3FileBlock || attr->type==Nfs3FileChar){
rdev = ino->block[0];
attr->major = (rdev>>8)&0xFF;
t@@ -659,6 +673,7 @@ ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
int skip1, tot, want, fragcount;
Inode ino;
Nfs3Status ok;
+ u64int size;
fs = fsys->priv;
if((ok = handle2ino(fs, h, nil, &ino)) != Nfs3Ok)
t@@ -667,14 +682,15 @@ ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
if((ok = inoperm(&ino, au, AREAD)) != Nfs3Ok)
return ok;
- if(offset >= ino.size){
+ size = inosize(&ino);
+ if(offset >= size){
*pdata = 0;
*pcount = 0;
*peof = 1;
return Nfs3Ok;
}
- if(offset+count > ino.size)
- count = ino.size-offset;
+ if(offset+count > size)
+ count = size-offset;
data = malloc(count);
if(data == nil)
t@@ -705,7 +721,7 @@ ext2readfile(Fsys *fsys, SunAuthUnix *au, Nfs3Handle *h, u32int count,
}
count = tot - skip1;
- *peof = (offset+count == ino.size);
+ *peof = (offset+count == size);
*pcount = count;
*pdata = data;
return Nfs3Ok;
DIR diff --git a/src/libdiskfs/ext2.h b/src/libdiskfs/ext2.h
t@@ -84,7 +84,7 @@ struct Super
};
/*
- * Blcok group on-disk format.
+ * Block group on-disk format.
*/
struct Group
{
t@@ -122,7 +122,7 @@ struct Inode
u32int block[NBLOCKS];/* Pointers to blocks */
u32int version; /* File version (for NFS) */
u32int fileacl; /* File ACL */
- u32int diracl; /* Directory ACL */
+ u32int diracl; /* Directory ACL or high size bits */
u32int faddr; /* Fragment address */
uchar osd2[12];
};