autofs: rename 'autofs' module back to 'autofs4' (Closes: #902946)
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@ -4,6 +4,7 @@ linux (4.18~rc3-1~exp2) UNRELEASED; urgency=medium
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- Build docs using Python 3 version of Sphinx
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- linux-perf: Build docs using asciidoctor
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- linux-perf: Use Python 3 for scripts
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* autofs: rename 'autofs' module back to 'autofs4' (Closes: #902946)
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-- Ben Hutchings <ben@decadent.org.uk> Fri, 06 Jul 2018 20:55:47 +0100
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@ -0,0 +1,84 @@
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From: Linus Torvalds <torvalds@linux-foundation.org>
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Date: Wed, 4 Jul 2018 18:17:51 -0700
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Subject: autofs: rename 'autofs' module back to 'autofs4'
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Origin: https://git.kernel.org/linus/d02d21ea007b6b33cdaf15c2f84fb1fea996ecc2
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Bug-Debian: https://bugs.debian.org/902946
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It turns out that systemd has a bug: it wants to load the autofs module
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early because of some initialization ordering with udev, and it doesn't
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do that correctly. Everywhere else it does the proper "look up module
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name" that does the proper alias resolution, but in that early code, it
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just uses a hardcoded "autofs4" for the module name.
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The result of that is that as of commit a2225d931f75 ("autofs: remove
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left-over autofs4 stubs"), you get
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systemd[1]: Failed to insert module 'autofs4': No such file or directory
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in the system logs, and a lack of module loading. All this despite the
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fact that we had very clearly marked 'autofs4' as an alias for this
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module.
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What's so ridiculous about this is that literally everything else does
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the module alias handling correctly, including really old versions of
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systemd (that just used 'modprobe' to do this), and even all the other
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systemd module loading code.
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Only that special systemd early module load code is broken, hardcoding
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the module names for not just 'autofs4', but also "ipv6", "unix",
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"ip_tables" and "virtio_rng". Very annoying.
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Instead of creating an _additional_ separate compatibility 'autofs4'
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module, just rely on the fact that everybody else gets this right, and
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just call the module 'autofs4' for compatibility reasons, with 'autofs'
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as the alias name.
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That will allow the systemd people to fix their bugs, adding the proper
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alias handling, and maybe even fix the name of the module to be just
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"autofs" (so that they can _test_ the alias handling). And eventually,
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we can revert this silly compatibility hack.
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See also
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https://github.com/systemd/systemd/issues/9501
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https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=902946
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for the systemd bug reports upstream and in the Debian bug tracker
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respectively.
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Fixes: a2225d931f75 ("autofs: remove left-over autofs4 stubs")
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Reported-by: Ben Hutchings <ben@decadent.org.uk>
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Reported-by: Michael Biebl <biebl@debian.org>
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Cc: Ian Kent <raven@themaw.net>
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Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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---
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fs/autofs/Makefile | 4 ++--
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fs/autofs/init.c | 2 +-
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2 files changed, 3 insertions(+), 3 deletions(-)
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diff --git a/fs/autofs/Makefile b/fs/autofs/Makefile
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index 43fedde15c26..1f85d35ec8b7 100644
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--- a/fs/autofs/Makefile
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+++ b/fs/autofs/Makefile
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@@ -2,6 +2,6 @@
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# Makefile for the linux autofs-filesystem routines.
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#
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-obj-$(CONFIG_AUTOFS_FS) += autofs.o
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+obj-$(CONFIG_AUTOFS_FS) += autofs4.o
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-autofs-objs := init.o inode.o root.o symlink.o waitq.o expire.o dev-ioctl.o
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+autofs4-objs := init.o inode.o root.o symlink.o waitq.o expire.o dev-ioctl.o
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diff --git a/fs/autofs/init.c b/fs/autofs/init.c
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index cc9447e1903f..79ae07d9592f 100644
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--- a/fs/autofs/init.c
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+++ b/fs/autofs/init.c
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@@ -23,7 +23,7 @@ static struct file_system_type autofs_fs_type = {
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.kill_sb = autofs_kill_sb,
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};
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MODULE_ALIAS_FS("autofs");
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-MODULE_ALIAS("autofs4");
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+MODULE_ALIAS("autofs");
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static int __init init_autofs_fs(void)
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{
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@ -87,6 +87,7 @@ bugfix/all/kbuild-include-addtree-remove-quotes-before-matching-path.patch
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debian/revert-objtool-fix-config_stack_validation-y-warning.patch
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bugfix/all/i40e-build-for-64-bit-targets-only.patch
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bugfix/all/netfilter-ipvs-Fix-invalid-bytes-in-IP_VS_MH_TAB_IND.patch
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bugfix/all/autofs-rename-autofs-module-back-to-autofs4.patch
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# Miscellaneous features
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