mke2fs: open device writable for trim/discard

Sorry about that, the discard ioctl doesn't actually work
unless you open the file with write capabilities...

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

diff --git a/misc/mke2fs.c b/misc/mke2fs.c
index 02cd1b7..80b9c0b 100644 (file)
--- a/misc/mke2fs.c
+++ b/misc/mke2fs.c
@@ -1929,7 +1929,7 @@ static void mke2fs_discard_blocks(ext2_filsys fs)
        range[0] = 0;
        range[1] = blocks * blocksize;
 
-       fd = open64(fs->device_name, O_RDONLY);
+       fd = open64(fs->device_name, O_RDWR);
 
        /*
         * We don't care about whether the ioctl succeeds; it's only an