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f269ae55d2
Add a new data op to walk all data and metadata in a filesystem, checking if it can be read successfully, and on error repairing from another copy if possible. - New helper: bch2_dev_idx_is_online(), so that we can bail out and report to userspace when we're unable to scrub because the device is offline - data_update_opts, which controls the data move path, now understands scrub: data is only read, not written. The read path is responsible for rewriting on read error, as with other reads. - scrub_pred skips data extents that don't have checksums - bch_ioctl_data has a new scrub member, which has a data_types field for data types to check - i.e. all data types, or only metadata. - Add new entries to bch_move_stats so that we can report numbers for corrected and uncorrected errors - Add a new enum to bch_ioctl_data_event for explicitly reporting completion and return code (i.e. device offline) Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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.