linux-kernel - Re: [ANNOUNCE] Btrfs v0.10 (online growing/shrinking, ext3 conversion, and more)

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Date:	Tue, 15 Jan 2008 11:55:55 -0500
From:	Kyle McMartin <kyle@...artin.ca>
To:	Chris Mason <chris.mason@...cle.com>
Cc:	btrfs-devel@....oracle.com, linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org
Subject: Re: [ANNOUNCE] Btrfs v0.10 (online growing/shrinking, ext3
	conversion, and more)

On Tue, Jan 15, 2008 at 10:52:38AM -0500, Chris Mason wrote:
> http://oss.oracle.com/projects/btrfs/
> 
> Btrfs is still in an early alpha state, and the disk format is not finalized.
> v0.10 introduces a new disk format, and is not compatible with v0.9.
> 

Looks like fun. btrfsck fails to check if it actually received a
dev argument though, so if you don't pass a device, we get a nice
segfault.

Signed-off-by: Kyle McMartin <kmcmartin@...hat.com>

---
diff -Nur btrfs-progs-0.10/btrfsck.c btrfs-progs-0.10-kyle/btrfsck.c
--- btrfs-progs-0.10/btrfsck.c	2008-01-15 10:33:32.000000000 -0500
+++ btrfs-progs-0.10-kyle/btrfsck.c	2008-01-15 11:49:24.000000000 -0500
@@ -709,6 +709,11 @@
 	return err;
 }
 
+void print_usage(void) {
+	fprintf(stderr, "usage: btrfsck dev\n");
+	exit(1);
+}
+
 int main(int ac, char **av) {
 	struct btrfs_root *root;
 	struct cache_tree extent_cache;
@@ -727,6 +732,9 @@
 	int slot;
 	struct btrfs_root_item ri;
 
+	if (ac < 2)
+		print_usage();
+
 	radix_tree_init();
 	cache_tree_init(&extent_cache);
 	cache_tree_init(&seen);
--
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