Hi Linus,
please apply this patch (a forward port from 2.4.19) which replaces the
check for the QNX boot-sector signature by a check for another signature
in the superblock (the (invariant) name of the root dir).
This allows us to mount partitions created with QNX 6.1+ (that don't
have the boot-sector signature we used to check for), without breaking
existing functionality.
fs/Config.help already claims we have this functionality, so the code
really needs to be updated to reflect that...
Cheers
Anders (qnx4fs maintainer)
diff -ur linux-2.5.42.qnx4fs-patch1/fs/qnx4/inode.c linux-2.5.42/fs/qnx4/inode.c
--- linux-2.5.42.qnx4fs-patch1/fs/qnx4/inode.c Sun Oct 13 10:53:54 2002
+++ linux-2.5.42/fs/qnx4/inode.c Sun Oct 13 10:54:35 2002
@@ -356,26 +356,19 @@
sb_set_blocksize(s, QNX4_BLOCK_SIZE);
- /* Check the boot signature. Since the qnx4 code is
+ /* Check the superblock signature. Since the qnx4 code is
dangerous, we should leave as quickly as possible
if we don't belong here... */
- bh = sb_bread(s, 0);
+ bh = sb_bread(s, 1);
if (!bh) {
- printk("qnx4: unable to read the boot sector\n");
+ printk("qnx4: unable to read the superblock\n");
goto outnobh;
}
- if ( memcmp( (char*)bh->b_data + 4, "QNX4FS", 6 ) ) {
+ if ( le32_to_cpu( *(__u32*)bh->b_data ) != QNX4_SUPER_MAGIC ) {
if (!silent)
- printk("qnx4: wrong fsid in boot sector.\n");
+ printk("qnx4: wrong fsid in superblock.\n");
goto out;
}
- brelse(bh);
-
- bh = sb_bread(s, 1);
- if (!bh) {
- printk("qnx4: unable to read the superblock\n");
- goto outnobh;
- }
s->s_op = &qnx4_sops;
s->s_magic = QNX4_SUPER_MAGIC;
#ifndef CONFIG_QNX4FS_RW
@@ -583,7 +576,7 @@
return err;
}
- printk("QNX4 filesystem 0.2.2 registered.\n");
+ printk("QNX4 filesystem 0.2.3 registered.\n");
return 0;
}
-
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This archive was generated by hypermail 2b29 : Tue Oct 15 2002 - 22:00:46 EST