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The parse_param callback handles one parameter at a time, take our existing mount option parsing loop and adjust it to handle one parameter at a time, and tie it into the fs_context_operations. Create a btrfs_fs_context object that will store the various mount properties, we'll house this in fc->fs_private. This is necessary to separate because remounting will use ->reconfigure, and we'll get a new copy of the parsed parameters, so we can no longer directly mess with the fs_info in this stage. In the future we'll add this to the btrfs_fs_info and update the users to use the new context object instead. There's a change how the option device= is processed. Previously all mount options were parsed in one go under uuid_mutex and the devices opened. This prevented a concurrent scan to happen during mount. Now we could see a device scan happen (e.g. by udev) but this should not affect the end result, mount will either see the populated fs_devices or will scan the device by itself. Alternatively we could save all the device paths first and then process them in one go as before but this does not seem to be necessary. Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Acked-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: David Sterba <dsterba@suse.com> [ add note about device scanning ] Signed-off-by: David Sterba <dsterba@suse.com> |
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| fs | ||
| include | ||
| init | ||
| io_uring | ||
| ipc | ||
| kernel | ||
| lib | ||
| LICENSES | ||
| mm | ||
| net | ||
| rust | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .clang-format | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .rustfmt.toml | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.