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Qu Wenruo f21928dba2 btrfs: populate otime when logging an inode item 
commit 1ef94169db upstream.

[TEST FAILURE WITH EXPERIMENTAL FEATURES]
When running test case generic/508, the test case will fail with the new
btrfs shutdown support:

generic/508       - output mismatch (see /home/adam/xfstests/results//generic/508.out.bad)
#    --- tests/generic/508.out	2022-05-11 11:25:30.806666664 +0930
#    +++ /home/adam/xfstests/results//generic/508.out.bad	2025-07-02 14:53:22.401824212 +0930
#    @@ -1,2 +1,6 @@
#     QA output created by 508
#     Silence is golden
#    +Before:
#    +After : stat.btime = Thu Jan  1 09:30:00 1970
#    +Before:
#    +After : stat.btime = Wed Jul  2 14:53:22 2025
#    ...
#    (Run 'diff -u /home/adam/xfstests/tests/generic/508.out /home/adam/xfstests/results//generic/508.out.bad'  to see the entire diff)
Ran: generic/508
Failures: generic/508
Failed 1 of 1 tests

Please note that the test case requires shutdown support, thus the test
case will be skipped using the current upstream kernel, as it doesn't
have shutdown ioctl support.

[CAUSE]
The direct cause the 0 time stamp in the log tree:

leaf 30507008 items 2 free space 16057 generation 9 owner TREE_LOG
leaf 30507008 flags 0x1(WRITTEN) backref revision 1
checksum stored e522548d
checksum calced e522548d
fs uuid 57d45451-481e-43e4-aa93-289ad707a3a0
chunk uuid d52bd3fd-5163-4337-98a7-7986993ad398
	item 0 key (257 INODE_ITEM 0) itemoff 16123 itemsize 160
		generation 9 transid 9 size 0 nbytes 0
		block group 0 mode 100644 links 1 uid 0 gid 0 rdev 0
		sequence 1 flags 0x0(none)
		atime 1751432947.492000000 (2025-07-02 14:39:07)
		ctime 1751432947.492000000 (2025-07-02 14:39:07)
		mtime 1751432947.492000000 (2025-07-02 14:39:07)
		otime 0.0 (1970-01-01 09:30:00) <<<

But the old fs tree has all the correct time stamp:

btrfs-progs v6.12
fs tree key (FS_TREE ROOT_ITEM 0)
leaf 30425088 items 2 free space 16061 generation 5 owner FS_TREE
leaf 30425088 flags 0x1(WRITTEN) backref revision 1
checksum stored 48f6c57e
checksum calced 48f6c57e
fs uuid 57d45451-481e-43e4-aa93-289ad707a3a0
chunk uuid d52bd3fd-5163-4337-98a7-7986993ad398
	item 0 key (256 INODE_ITEM 0) itemoff 16123 itemsize 160
		generation 3 transid 0 size 0 nbytes 16384
		block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0
		sequence 0 flags 0x0(none)
		atime 1751432947.0 (2025-07-02 14:39:07)
		ctime 1751432947.0 (2025-07-02 14:39:07)
		mtime 1751432947.0 (2025-07-02 14:39:07)
		otime 1751432947.0 (2025-07-02 14:39:07) <<<

The root cause is that fill_inode_item() in tree-log.c is only
populating a/c/m time, not the otime (or btime in statx output).

Part of the reason is that, the vfs inode only has a/c/m time, no native
btime support yet.

[FIX]
Thankfully btrfs has its otime stored in btrfs_inode::i_otime_sec and
btrfs_inode::i_otime_nsec.

So what we really need is just fill the otime time stamp in
fill_inode_item() of tree-log.c

There is another fill_inode_item() in inode.c, which is doing the proper
otime population.

Fixes: 94edf4ae43 ("Btrfs: don't bother committing delayed inode updates when fsyncing")
CC: stable@vger.kernel.org
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-08-20 18:30:53 +02:00
arch MIPS: lantiq: falcon: sysctrl: fix request memory check logic 2025-08-20 18:30:43 +02:00
block block: Introduce bio_needs_zone_write_plugging() 2025-08-20 18:30:51 +02:00
certs sign-file,extract-cert: use pkcs11 provider for OPENSSL MAJOR >= 3 2024-09-20 19:52:48 +03:00
crypto crypto: jitter - fix intermediary handling 2025-08-20 18:30:42 +02:00
Documentation Documentation: ACPI: Fix parent device references 2025-08-20 18:30:15 +02:00
drivers cdc-acm: fix race between initial clearing halt and open 2025-08-20 18:30:52 +02:00
fs btrfs: populate otime when logging an inode item 2025-08-20 18:30:53 +02:00
include block: Introduce bio_needs_zone_write_plugging() 2025-08-20 18:30:51 +02:00
init io_uring: fix breakage in EXPERT menu 2025-08-15 12:13:32 +02:00
io_uring io_uring/poll: fix POLLERR handling 2025-07-24 08:56:23 +02:00
ipc ipc: fix to protect IPCS lookups using RCU 2025-06-27 11:11:22 +01:00
kernel printk: nbcon: Allow reacquire during panic 2025-08-20 18:30:47 +02:00
lib lib/sbitmap: convert shallow_depth from one word to the whole sbitmap 2025-08-20 18:30:49 +02:00
LICENSES LICENSES: add 0BSD license text 2024-09-01 20:43:24 -07:00
mm mm/damon/core: commit damos->target_nid 2025-08-20 18:30:51 +02:00
net vsock/virtio: Resize receive buffers so that each SKB fits in a 4K page 2025-08-20 18:30:40 +02:00
rust rust: use #[used(compiler)] to fix build and modpost with Rust >= 1.89.0 2025-07-24 08:56:37 +02:00
samples samples: mei: Fix building on musl libc 2025-08-15 12:13:38 +02:00
scripts kconfig: lxdialog: fix 'space' to (de)select options 2025-08-20 18:30:48 +02:00
security apparmor: fix x_table_lookup when stacking is not the first entry 2025-08-20 18:30:47 +02:00
sound ASoC: fsl_sai: replace regmap_write with regmap_update_bits 2025-08-20 18:30:50 +02:00
tools tools/power turbostat: Handle cap_get_proc() ENOSYS 2025-08-20 18:30:49 +02:00
usr kbuild: hdrcheck: fix cross build with clang 2025-03-13 13:02:18 +01:00
virt KVM: Allow CPU to reschedule while setting per-page memory attributes 2025-07-17 18:37:08 +02:00
.clang-format clang-format: Update with v6.11-rc1's for_each macro list 2024-08-02 13:20:31 +02:00
.clippy.toml rust: give Clippy the minimum supported Rust version 2025-08-01 09:48:44 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore rust: introduce .clippy.toml 2025-03-13 13:01:42 +01:00
.mailmap mailmap: add entry for Thorsten Blum 2024-11-07 14:14:59 -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 self from DSA entry 2024-11-03 12:52:38 -08:00
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 MAINTAINERS: Update Alexey Makhalov's email address 2025-05-22 14:29:46 +02:00
Makefile Linux 6.12.42 2025-08-15 12:14:14 +02:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.