static int v7_fill_super(struct super_block *sb, void *data, int silent)
{
struct sysv_sb_info *sbi;
struct buffer_head *bh;
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kzalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
sbi->s_sb = sb;
sbi->s_block_base = 0;
sbi->s_type = FSTYPE_V7;
sb->s_fs_info = sbi;
sb_set_blocksize(sb, 512);
if ((bh = sb_bread(sb, 1)) == NULL) {
if (!silent)
printk("VFS: unable to read V7 FS superblock on "
"device %s.\n", sb->s_id);
goto failed;
}
/* Try PDP-11 UNIX */
sbi->s_bytesex = BYTESEX_PDP;
if (v7_sanity_check(sb, bh))
goto detected;
/* Try PC/IX, v7/x86 */
sbi->s_bytesex = BYTESEX_LE;
if (v7_sanity_check(sb, bh))
goto detected;
goto failed;
detected:
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
if (complete_read_super(sb, silent, 1))
return 0;
failed:
printk(KERN_ERR "VFS: could not find a valid V7 on %s.\n",
sb->s_id);
brelse(bh);
kfree(sbi);
return -EINVAL;
}
static int v7_fill_super(struct super_block *sb, void *data, int silent)
{
struct sysv_sb_info *sbi;
struct buffer_head *bh, *bh2 = NULL;
struct v7_super_block *v7sb;
struct sysv_inode *v7i;
if (440 != sizeof (struct v7_super_block))
panic("V7 FS: bad super-block size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad i-node size");
sbi = kmalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
memset(sbi, 0, sizeof(struct sysv_sb_info));
sbi->s_sb = sb;
sbi->s_block_base = 0;
sbi->s_type = FSTYPE_V7;
sbi->s_bytesex = BYTESEX_PDP;
sb->s_fs_info = sbi;
sb_set_blocksize(sb, 512);
if ((bh = sb_bread(sb, 1)) == NULL) {
if (!silent)
printk("VFS: unable to read V7 FS superblock on "
"device %s.\n", sb->s_id);
goto failed;
}
/* plausibility check on superblock */
v7sb = (struct v7_super_block *) bh->b_data;
if (fs16_to_cpu(sbi, v7sb->s_nfree) > V7_NICFREE ||
fs16_to_cpu(sbi, v7sb->s_ninode) > V7_NICINOD ||
fs32_to_cpu(sbi, v7sb->s_time) == 0)
goto failed;
/* plausibility check on root inode: it is a directory,
with a nonzero size that is a multiple of 16 */
if ((bh2 = sb_bread(sb, 2)) == NULL)
goto failed;
v7i = (struct sysv_inode *)(bh2->b_data + 64);
if ((fs16_to_cpu(sbi, v7i->i_mode) & ~0777) != S_IFDIR ||
(fs32_to_cpu(sbi, v7i->i_size) == 0) ||
(fs32_to_cpu(sbi, v7i->i_size) & 017) != 0)
goto failed;
brelse(bh2);
bh2 = NULL;
sbi->s_bh1 = bh;
sbi->s_bh2 = bh;
if (complete_read_super(sb, silent, 1))
return 0;
failed:
brelse(bh2);
brelse(bh);
kfree(sbi);
return -EINVAL;
}
static int sysv_fill_super(struct super_block *sb, void *data, int silent)
{
struct buffer_head *bh1, *bh = NULL;
struct sysv_sb_info *sbi;
unsigned long blocknr;
int size = 0, i;
if (1024 != sizeof (struct xenix_super_block))
panic("Xenix FS: bad superblock size");
if (512 != sizeof (struct sysv4_super_block))
panic("SystemV FS: bad superblock size");
if (512 != sizeof (struct sysv2_super_block))
panic("SystemV FS: bad superblock size");
if (500 != sizeof (struct coh_super_block))
panic("Coherent FS: bad superblock size");
if (64 != sizeof (struct sysv_inode))
panic("sysv fs: bad inode size");
sbi = kmalloc(sizeof(struct sysv_sb_info), GFP_KERNEL);
if (!sbi)
return -ENOMEM;
memset(sbi, 0, sizeof(struct sysv_sb_info));
sbi->s_sb = sb;
sbi->s_block_base = 0;
sb->s_fs_info = sbi;
sb_set_blocksize(sb, BLOCK_SIZE);
for (i = 0; i < sizeof(flavours)/sizeof(flavours[0]) && !size; i++) {
brelse(bh);
bh = sb_bread(sb, flavours[i].block);
if (!bh)
continue;
size = flavours[i].test(SYSV_SB(sb), bh);
}
if (!size)
goto Eunknown;
switch (size) {
case 1:
blocknr = bh->b_blocknr << 1;
brelse(bh);
sb_set_blocksize(sb, 512);
bh1 = sb_bread(sb, blocknr);
bh = sb_bread(sb, blocknr + 1);
break;
case 2:
bh1 = bh;
break;
case 3:
blocknr = bh->b_blocknr >> 1;
brelse(bh);
sb_set_blocksize(sb, 2048);
bh1 = bh = sb_bread(sb, blocknr);
break;
default:
goto Ebadsize;
}
if (bh && bh1) {
sbi->s_bh1 = bh1;
sbi->s_bh2 = bh;
if (complete_read_super(sb, silent, size))
return 0;
}
brelse(bh1);
brelse(bh);
sb_set_blocksize(sb, BLOCK_SIZE);
printk("oldfs: cannot read superblock\n");
failed:
kfree(sbi);
return -EINVAL;
Eunknown:
brelse(bh);
if (!silent)
printk("VFS: unable to find oldfs superblock on device %s\n",
sb->s_id);
goto failed;
Ebadsize:
brelse(bh);
if (!silent)
printk("VFS: oldfs: unsupported block size (%dKb)\n",
1<<(size-2));
goto failed;
}