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Hongbo Li 05fba0a115
fs: support relative paths with FSCONFIG_SET_STRING
The fs_lookup_param did not consider the relative path for block device.
When we mount ext4 with journal_path option using relative path,
param->dirfd was not set which will cause mounting error.

This can be reproduced easily like this:

mke2fs -F -O journal_dev $JOURNAL_DEV -b 4096 100M
mkfs.ext4 -F -J device=$JOURNAL_DEV -b 4096 $FS_DEV
cd /dev; mount -t ext4 -o journal_path=`basename $JOURNAL_DEV` $FS_DEV $MNT

Fixes: 461c3af045 ("ext4: Change handle_mount_opt() to use fs_parameter")
Suggested-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Link: https://lore.kernel.org/r/20240925015624.3817878-1-lihongbo22@huawei.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
History 2024-10-02 07:52:33 +02:00
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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 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.