mirror of
https://git.savannah.gnu.org/git/guix.git
synced 2026-08-07 03:41:29 +02:00
Janneke Nieuwenhuizen
83445f4590
* gnu/packages/patches/linux-shmem-hurd-xattr.patch: New file. * gnu/local.mk (dist_patch_DATA): Register it. * gnu/packages/linux.scm (linux-libre-7.0-source): Use it. Change-Id: Iedb5d891a7f7638a1644a036e0304ca856d7e4a8 Signed-off-by: Vagrant Cascadian <vagrant@debian.org>
72 lines
2.6 KiB
Diff
72 lines
2.6 KiB
Diff
Upstream status: Being tested; not yet presented upstream.
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From 6f9b9584f43d9d6058e10048dd0dfc5d0eff88c4 Mon Sep 17 00:00:00 2001
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From: Janneke Nieuwenhuizen <janneke@gnu.org>
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Date: Fri, 15 May 2026 10:12:30 +0200
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Subject: [PATCH] shmem: support xattr gnu.* namespace for the Hurd
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The Hurd gained[0] support for moving the translator and author
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fields out of the inode and into the "gnu.*" xattr namespace.
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In anticipation of that, an xattr INDEX was reserved[1]. The Hurd has
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now been brought into compliance[2] with that, and so has ext4[3].
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This patch adds support for reading and writing such attributes from
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a Linux tmpfs; you can now do something like
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mkdir -p hurd-root
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mount -t tmpfs -o size=2M tmpfs hurd-root
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mkdir -p hurd-root/servers/socket
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touch hurd-root/servers/socket/1
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setfattr --name=gnu.translator --value='"/hurd/pflocal\0"' \
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hurd-root/servers/socket/1
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getfattr --name=gnu.translator hurd-root/servers/socket/1
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# file: 1
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gnu.translator="/hurd/pflocal"
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to setup a pipe translator, which is being used to create an
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initial file-system image for the Hurd from GNU Guix[4].
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[0] https://summerofcode.withgoogle.com/projects/#5869799859027968
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[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3980bd3b406addb327d858aebd19e229ea340b9a
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[2] https://git.savannah.gnu.org/cgit/hurd/hurd.git/commit/?id=a04c7bf83172faa7cb080fbe3b6c04a8415ca645
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[3] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=88ee9d571b6d8ed345f877e05f685814412e359b
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[4] https://git.savannah.gnu.org/cgit/guix.git/log/?h=wip-hurd-vm
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---
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mm/shmem.c | 8 ++++++++
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1 file changed, 8 insertions(+)
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diff --git a/mm/shmem.c b/mm/shmem.c
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index 3b5dc21b323c..5d60aa4dba92 100644
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--- a/mm/shmem.c
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+++ b/mm/shmem.c
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@@ -15,6 +15,7 @@
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* Extended attribute support for tmpfs:
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* Copyright (c) 2004, Luke Kenneth Casson Leighton <lkcl@lkcl.net>
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* Copyright (c) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
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+ * Copyright (C) 2026 Janneke Nieuwenhuizen <janneke@gnu.org>
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*
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* tiny-shmem:
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* Copyright (c) 2004, 2008 Matt Mackall <mpm@selenic.com>
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@@ -4371,10 +4372,17 @@ static const struct xattr_handler shmem_user_xattr_handler = {
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.set = shmem_xattr_handler_set,
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};
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+static const struct xattr_handler shmem_hurd_xattr_handler = {
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+ .prefix = XATTR_HURD_PREFIX,
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+ .get = shmem_xattr_handler_get,
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+ .set = shmem_xattr_handler_set,
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+};
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+
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static const struct xattr_handler * const shmem_xattr_handlers[] = {
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&shmem_security_xattr_handler,
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&shmem_trusted_xattr_handler,
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&shmem_user_xattr_handler,
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+ &shmem_hurd_xattr_handler,
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NULL
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};
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--
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2.54.0
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