[PATCH] Btrfs-progs: btrfs file system size should be bigger then 256m

[Shen Feng]

According to btrfs_prepare_device, btrfs file sysstem size
should be bigger then 256m.

If mkfs.btrfs specifies the file system size samaller then
that, mkfs.btrfs should report error.

Signed-off-by: Shen Feng <s...@cn.fujitsu.com>
---
 mkfs.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/mkfs.c b/mkfs.c
index be93aaa..447e8d7 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -377,6 +377,10 @@ int main(int ac, char **av)
                                break;
                        case 'b':
                                block_count = parse_size(optarg);
+                               if (block_count < 256*1024*1024) {
+                                       fprintf(stderr, "File system size is 
too small\n");
+                                       exit(1);
+                               }
                                zero_end = 0;
                                break;
                        default:
-- 
1.6.0.6
--
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