From: Eric Sandeen <sandeen@redhat.com>
Date: Tue, 17 Nov 2009 21:49:03 +0000 (-0600)
Subject: mke2fs: open device writable for trim/discard
X-Git-Tag: v1.41.10~20
X-Git-Url: https://git.whamcloud.com/?a=commitdiff_plain;h=f3befe3e6b74f8ab33d619d2213bbd130cd5b191;p=tools%2Fe2fsprogs.git

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
--- 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