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Zhihao Cheng b648f57175 ext4: fix unttached inode after power cut with orphan file feature enabled [ Upstream commit `1524773425` ] Running generic/475(filesystem consistent tests after power cut) could easily trigger unattached inode error while doing fsck: Unattached zero-length inode 39405. Clear? no Unattached inode 39405 Connect to /lost+found? no Above inconsistence is caused by following process: P1 P2 ext4_create inode = ext4_new_inode_start_handle // itable records nlink=1 ext4_add_nondir err = ext4_add_entry // ENOSPC ext4_append ext4_bread ext4_getblk ext4_map_blocks // returns ENOSPC drop_nlink(inode) // won't be updated into disk inode ext4_orphan_add(handle, inode) ext4_orphan_file_add ext4_journal_stop(handle) jbd2_journal_commit_transaction // commit success >> power cut << ext4_fill_super ext4_load_and_init_journal // itable records nlink=1 ext4_orphan_cleanup ext4_process_orphan if (inode->i_nlink) // true, inode won't be deleted Then, allocated inode will be reserved on disk and corresponds to no dentries, so e2fsck reports 'unattached inode' problem. The problem won't happen if orphan file feature is disabled, because ext4_orphan_add() will update disk inode in orphan list mode. There are several places not updating disk inode while putting inode into orphan area, such as ext4_add_nondir(), ext4_symlink() and whiteout in ext4_rename(). Fix it by updating inode into disk in all error branches of these places. Link: https://bugzilla.kernel.org/show_bug.cgi?id=217605 Fixes: `02f310fcf4` ("ext4: Speedup ext4 orphan inode handling") Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20230628132011.650383-1-chengzhihao1@huawei.com Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2023-09-13 09:42:49 +02:00
arch	powerpc/iommu: Fix notifiers being shared by PCI and VIO buses	2023-09-13 09:42:48 +02:00
block	block/mq-deadline: use correct way to throttling write requests	2023-09-13 09:42:42 +02:00
certs	certs: Fix build error when PKCS#11 URI contains semicolon	2023-02-09 11:28:11 +01:00
crypto	crypto: api - Use work queue in crypto_destroy_instance	2023-09-13 09:42:32 +02:00
Documentation	media: uapi: HEVC: Add num_delta_pocs_of_ref_rps_idx field	2023-09-13 09:42:20 +02:00
drivers	powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT	2023-09-13 09:42:48 +02:00
fs	ext4: fix unttached inode after power cut with orphan file feature enabled	2023-09-13 09:42:49 +02:00
include	NFSv4.2: Rework scratch handling for READ_PLUS	2023-09-13 09:42:48 +02:00
init	sched/psi: Select KERNFS as needed	2023-09-13 09:42:28 +02:00
io_uring	io_uring: fix drain stalls by invalid SQE	2023-09-13 09:42:43 +02:00
ipc	ipc: fix memory leak in init_mqueue_fs()	2022-12-31 13:32:01 +01:00
kernel	PCI: Allow drivers to request exclusive config regions	2023-09-13 09:42:46 +02:00
lib	maple_tree: disable mas_wr_append() when other readers are possible	2023-08-30 16:11:13 +02:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	net-memcg: Fix scope of sockmem pressure indicators	2023-09-13 09:42:33 +02:00
net	netrom: Deny concurrent connect().	2023-09-13 09:42:35 +02:00
rust	rust: allocator: Prevent mis-aligned allocation	2023-08-11 12:08:18 +02:00
samples	samples/bpf: fix broken map lookup probe	2023-09-13 09:42:34 +02:00
scripts	kbuild: rust_is_available: fix confusion when a version appears in the path	2023-09-13 09:42:32 +02:00
security	smackfs: Prevent underflow in smk_set_cipso()	2023-09-13 09:42:42 +02:00
sound	ALSA: ac97: Fix possible error value of *rac97	2023-09-13 09:42:44 +02:00
tools	selftests/bpf: Clean up fmod_ret in bench_rename test script	2023-09-13 09:42:33 +02:00
usr	usr/gen_init_cpio.c: remove unnecessary -1 values from int file	2022-10-03 14:21:44 -07:00
virt	kvm/vfio: ensure kvg instance stays around in kvm_vfio_group_add()	2023-09-13 09:42:46 +02:00
.clang-format	inet: ping: use hlist_nulls rcu iterator during lookup	2022-12-01 12:42:46 +01:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore	get_maintainer: add Alan to .get_maintainer.ignore	2022-08-20 15:17:44 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	Kbuild: add Rust support	2022-09-28 09:02:20 +02:00
.mailmap	9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address	2022-12-10 17:10:52 -08:00
.rustfmt.toml	rust: add `.rustfmt.toml`	2022-09-28 09:02:20 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Remove Michal Marek from Kbuild maintainers	2022-11-16 14:53:00 +09:00
Kbuild	Kbuild updates for v6.1	2022-10-10 12:00:45 -07:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	devlink: move code to a dedicated directory	2023-08-30 16:11:00 +02:00
Makefile	kbuild: rust_is_available: remove -v option	2023-09-13 09:42:32 +02:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.