mirror of
https://github.com/torvalds/linux.git
synced 2026-01-25 15:03:52 +08:00
4937e604ca
The virt_boundary_mask limit requires an unlimited max_segment_size for bio splitting to not corrupt data. Historically, the block layer tried to validate this, although the check was half-hearted until the addition of the atomic queue limits API. The full blown check then triggered issues with stacked devices incorrectly inheriting limits such as the virt boundary and got disabled in commitb561ea56a2("block: allow device to have both virt_boundary_mask and max segment size") instead of fixing the issue properly. Ensure that the SCSI mid layer doesn't set the default low max_segment_size limit for this case, and check for invalid max_segment_size values in the host template, similar to the original block layer check given that SCSI devices can't be stacked. This fixes reported data corruption on storvsc, although as far as I can tell storvsc always failed to properly set the max_segment_size limit as the SCSI APIs historically applied that when setting up the host, while storvsc only set the virt_boundary_mask when configuring the scsi_device. Fixes:81988a0e6b("storvsc: get rid of bounce buffer") Fixes:b561ea56a2("block: allow device to have both virt_boundary_mask and max segment size") Reported-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Link: https://lore.kernel.org/r/20250624125233.219635-3-hch@lst.de Reviewed-by: John Garry <john.g.garry@oracle.com> Reviewed-by: Ming Lei <ming.lei@redhat.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
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.