From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@kernel.dk>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Mike Snitzer <snitzer@kernel.org>,
Joern Engel <joern@lazybastard.org>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Richard Weinberger <richard@nod.at>,
Vignesh Raghavendra <vigneshr@ti.com>,
Pavel Machek <pavel@ucw.cz>,
dm-devel@redhat.com, linux-kernel@vger.kernel.org,
linux-block@vger.kernel.org, linux-mtd@lists.infradead.org,
linux-pm@vger.kernel.org
Subject: fix the name_to_dev_t mess
Date: Tue, 23 May 2023 09:45:11 +0200 [thread overview]
Message-ID: <20230523074535.249802-1-hch@lst.de> (raw)
Hi all,
this series tries to sort out accumulated mess around the name_to_dev_t
function. This function is intended to allow looking up the dev_t of a
block device based on a name string before the root file systems is
mounted and thus the normal path based lookup is available.
Unfortunately a few years ago it managed to get exported and used in
non-init contexts, leading to the something looking like a path name
also beeing lookuped up by a different and potential dangerous
algorithm.
This series does a fair amount of refactoring and finally ends up with
the renamed and improved name_to_dev_t only beeing available for the
early init code again.
The series is against Jens' for-6.5/block tree but probably applies
against current mainline just fine as well.
A git tree is also available here:
git://git.infradead.org/users/hch/block.git blk-init-cleanup
Gitweb:
http://git.infradead.org/users/hch/block.git/shortlog/refs/heads/blk-init-cleanup
Diffstat:
Documentation/admin-guide/kernel-parameters.txt | 2
arch/alpha/kernel/setup.c | 2
arch/ia64/kernel/setup.c | 2
arch/powerpc/platforms/powermac/setup.c | 3
block/Makefile | 2
block/early-lookup.c | 315 ++++++++++++++++++
block/genhd.c | 92 -----
drivers/base/dd.c | 6
drivers/md/dm-init.c | 4
drivers/md/dm-snap.c | 14
drivers/md/dm-table.c | 26 -
drivers/md/md-autodetect.c | 3
drivers/mtd/devices/block2mtd.c | 62 ++-
fs/pstore/blk.c | 4
include/linux/blkdev.h | 6
include/linux/device-mapper.h | 2
include/linux/device/driver.h | 2
include/linux/mount.h | 1
include/linux/root_dev.h | 9
init/do_mounts.c | 416 ++++++------------------
init/do_mounts.h | 14
init/do_mounts_initrd.c | 11
kernel/power/hibernate.c | 167 +++++----
kernel/power/power.h | 3
kernel/power/swap.c | 2
25 files changed, 603 insertions(+), 567 deletions(-)
next reply other threads:[~2023-05-23 7:46 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-23 7:45 Christoph Hellwig [this message]
2023-05-23 7:45 ` [PATCH 01/24] driver core: return bool from driver_probe_done Christoph Hellwig
2023-05-23 16:34 ` Greg Kroah-Hartman
2023-05-23 7:45 ` [PATCH 02/24] PM: hibernate: factor out a helper to find the resume device Christoph Hellwig
2023-05-23 18:25 ` Rafael J. Wysocki
2023-05-23 7:45 ` [PATCH 03/24] PM: hibernate: remove the global snapshot_test variable Christoph Hellwig
2023-05-23 18:30 ` Rafael J. Wysocki
2023-05-23 7:45 ` [PATCH 04/24] PM: hibernate: move finding the resume device out of software_resume Christoph Hellwig
2023-05-23 18:33 ` Rafael J. Wysocki
2023-05-23 7:45 ` [PATCH 05/24] init: remove pointless Root_* values Christoph Hellwig
2023-05-23 7:45 ` [PATCH 06/24] init: rename mount_block_root to mount_root_generic Christoph Hellwig
2023-05-23 7:45 ` [PATCH 07/24] init: refactor mount_root Christoph Hellwig
2023-05-23 7:45 ` [PATCH 08/24] init: pass root_device_name explicitly Christoph Hellwig
2023-05-23 7:45 ` [PATCH 09/24] init: don't remove the /dev/ prefix from error messages Christoph Hellwig
2023-05-23 7:45 ` [PATCH 10/24] init: handle ubi/mtd root mounting like all other root types Christoph Hellwig
2023-05-23 7:45 ` [PATCH 11/24] init: factor the root_wait logic in prepare_namespace into a helper Christoph Hellwig
2023-05-23 7:45 ` [PATCH 12/24] init: move the nfs/cifs/ram special cases out of name_to_dev_t Christoph Hellwig
2023-05-23 7:45 ` [PATCH 13/24] init: improve the name_to_dev_t interface Christoph Hellwig
2023-05-23 7:45 ` [PATCH 14/24] init: clear root_wait on all invalid root= strings Christoph Hellwig
2023-06-21 21:07 ` Guenter Roeck
2023-06-22 3:51 ` Christoph Hellwig
2023-06-22 4:28 ` Guenter Roeck
2023-06-22 6:00 ` Christoph Hellwig
2023-06-22 13:54 ` Guenter Roeck
2023-06-22 14:40 ` Christoph Hellwig
2023-06-22 14:57 ` Guenter Roeck
2023-05-23 7:45 ` [PATCH 15/24] block: move the code to do early boot lookup of block devices to block/ Christoph Hellwig
2023-05-24 4:58 ` Randy Dunlap
2023-05-24 4:59 ` Randy Dunlap
2023-05-24 6:08 ` Christoph Hellwig
2023-05-23 7:45 ` [PATCH 16/24] block: move more code to early-lookup.c Christoph Hellwig
2023-05-23 7:45 ` [PATCH 17/24] dm-snap: simplify the origin_dev == cow_dev check in snapshot_ctr Christoph Hellwig
2023-05-23 16:56 ` Mike Snitzer
2023-05-23 7:45 ` [PATCH 18/24] dm: open code dm_get_dev_t in dm_init_init Christoph Hellwig
2023-05-23 16:57 ` Mike Snitzer
2023-05-23 7:45 ` [PATCH 19/24] dm: remove dm_get_dev_t Christoph Hellwig
2023-05-23 16:49 ` Mike Snitzer
2023-05-24 6:06 ` Christoph Hellwig
2023-05-23 7:45 ` [PATCH 20/24] dm: only call early_lookup_bdev from early boot context Christoph Hellwig
2023-05-23 16:59 ` Mike Snitzer
2023-05-23 7:45 ` [PATCH 21/24] PM: hibernate: don't use early_lookup_bdev in resume_store Christoph Hellwig
2023-05-23 18:36 ` Rafael J. Wysocki
2023-05-23 7:45 ` [PATCH 22/24] mtd: block2mtd: factor the early block device open logic into a helper Christoph Hellwig
2023-05-23 9:32 ` Miquel Raynal
2023-05-23 7:45 ` [PATCH 23/24] mtd: block2mtd: don't call early_lookup_bdev after the system is running Christoph Hellwig
2023-05-23 9:34 ` Miquel Raynal
2023-05-23 7:45 ` [PATCH 24/24] block: mark early_lookup_bdev as __init Christoph Hellwig
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