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| Filename | Latest commit message | Latest commit date |
|---|---|---|
d5514a1d67
[ Upstream commit 1ef94169db0958d6de39f9ea6e063ce887342e2d ]
[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:
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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.