From: Niu Yawei <yawei.niu@gmail.com>
Date: Tue, 8 Oct 2013 03:30:10 +0000 (+0800)
Subject: libext2fs: update i_size in ext2fs_file_write()
X-Git-Tag: v1.42.9~132
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=470ca046b1e682c419d50efc8d4941db1b8601d9;p=tools%2Fe2fsprogs.git

libext2fs: update i_size in ext2fs_file_write()

ext2fs_file_write() needs to update i_size on successful write,
otherwise, ext2fs_file_read() in same open/close cycle will not
be able to read the just written data.

This fixes a bug which results in the the problem of quotacheck
triggered on 'tune2fs -O quota' failed to write back multiple
users/groups accounting information.

Signed-off-by: Niu Yawei <yawei.niu@intel.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
---

diff --git a/lib/ext2fs/fileio.c b/lib/ext2fs/fileio.c
index e6bc60a..059bda2 100644
--- a/lib/ext2fs/fileio.c
+++ b/lib/ext2fs/fileio.c
@@ -307,6 +307,15 @@ errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
 	}
 
 fail:
+	/* Update inode size */
+	if (count != 0 && EXT2_I_SIZE(&file->inode) < file->pos) {
+		errcode_t	rc;
+
+		rc = ext2fs_file_set_size2(file, file->pos);
+		if (retval == 0)
+			retval = rc;
+	}
+
 	if (written)
 		*written = count;
 	return retval;