linux-ext4 - [PATCH V2] mke2fs: use ext2fs_open_file() in check

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Message-ID: <537CE6C0.1050800@redhat.com>
Date:	Wed, 21 May 2014 12:47:44 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
Subject: [PATCH V2] mke2fs: use ext2fs_open_file() in check_plausibility()

The commit:

802146c mke2fs: create a regular file if necessary

caused a regression on 32-bit machines; the open() fails if
the file size is > 4G.

Using ext2fs_open_file() fixes it.

Resolves: Red Hat Bugzilla #1099892

Signed-off-by: Eric Sandeen <sandeen@...hat.com>
---

V2: against master!  Sorry, first patch was against the
bisection point.

TBH I don't know if this should be using ext2fs_open_file(),
or some other magic like O_LARGEFILE, but this works for me,
and we use the stat/fstat wrapper here too, so ...



diff --git a/misc/util.c b/misc/util.c
index 1c0818f..7e91509 100644
--- a/misc/util.c
+++ b/misc/util.c
@@ -194,10 +194,10 @@ int check_plausibility(const char *device, int flags, int *ret_is_dev)
 	char *fs_type = NULL;
 	char *fs_label = NULL;
 
-	fd = open(device, fl, 0666);
+	fd = ext2fs_open_file(device, fl, 0666);
 	if ((fd < 0) && (errno == ENOENT) && (flags & CREATE_FILE)) {
 		fl |= O_CREAT;
-		fd = open(device, fl, 0666);
+		fd = ext2fs_open_file(device, fl, 0666);
 		if (fd >= 0 && (flags & VERBOSE_CREATE))
 			printf(_("Creating regular file %s\n"), device);
 	}


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