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Message-ID: <20220106023506.kwpzkqdpv6hozygk@zlang-mailbox> Date: Thu, 6 Jan 2022 10:35:06 +0800 From: Zorro Lang <zlang@...hat.com> To: Theodore Ts'o <tytso@....edu> Cc: fstests@...r.kernel.org, Ext4 Developers List <linux-ext4@...r.kernel.org> Subject: Re: [PATCH] ext4/033: test EXT4_IOC_RESIZE_FS by calling the ioctl directly On Wed, Jan 05, 2022 at 03:02:58PM -0500, Theodore Ts'o wrote: > On Thu, Jan 06, 2022 at 12:06:19AM +0800, Zorro Lang wrote: > > > This patch looks good to me, I just want to ask if we'd better to try to include > > > ext2fs/ext2fs.h at here? And of course, check it in configure.ac. > > > The EXT4_IOC_RESIZE_FS looks like defined in ext2fs/ext2_fs.h which comes from > > > e2fsprogs-devel package. I can't find this definition from kernel-hearders package. > > > As you're the expert of this part, please correct me if it's wrong :) > > We're not depending on ext2fs/ext2_fs.h and hence the e2fsprogs-devel > (or libext2fs-dev package if you're using Debian/Ubuntu) anywhere else > in the xfstests-dev. It's not like the code points for > EXT4_IOC_RESIZE_FS are going to change, so we just use constructs > like: > > #ifndef EXT4_IOC_RESIZE_FS > #define EXT4_IOC_RESIZE_FS _IOW('f', 16, __u64) > #endif > > in xfstests-dev/src/*.c as needed. > > There's no real upside in adding a dependency which makes it harder > for developers to compile xfstests. (Trivia note: I created > xfstests-bld several years ago because back then, Debian didn't > include some of the internal header files from xfsprogs which xfstests > needed.) Thanks for your kindly explanation. > > Cheers, > > - Ted >
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