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[ Upstream commit8ee236dcaa] If the inode has the compress flag, it will fail to use 'chattr -c +m' to remove its compress flag and tag no compress flag. However, the same command will be successful when executed again, as shown below: $ touch foo.txt $ chattr +c foo.txt $ chattr -c +m foo.txt chattr: Invalid argument while setting flags on foo.txt $ chattr -c +m foo.txt $ f2fs_io getflags foo.txt get a flag on foo.txt ret=0, flags=nocompression,inline_data Fix this by removing some checks in f2fs_setflags_common() that do not affect the original logic. I go through all the possible scenarios, and the results are as follows. Bold is the only thing that has changed. +---------------+-----------+-----------+----------+ | | file flags | + command +-----------+-----------+----------+ | | no flag | compr | nocompr | +---------------+-----------+-----------+----------+ | chattr +c | compr | compr | -EINVAL | | chattr -c | no flag | no flag | nocompr | | chattr +m | nocompr | -EINVAL | nocompr | | chattr -m | no flag | compr | no flag | | chattr +c +m | -EINVAL | -EINVAL | -EINVAL | | chattr +c -m | compr | compr | compr | | chattr -c +m | nocompr | *nocompr* | nocompr | | chattr -c -m | no flag | no flag | no flag | +---------------+-----------+-----------+----------+ Link: https://lore.kernel.org/linux-f2fs-devel/20220621064833.1079383-1-chaoliu719@gmail.com/ Fixes:4c8ff7095b("f2fs: support data compression") Reviewed-by: Chao Yu <chao@kernel.org> Signed-off-by: Chao Liu <liuchao@coolpad.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org>
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.