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The new member is an array of sector_ptr pointers, they will represent all sectors inside a full stripe (including P/Q). They co-operate with btrfs_raid_bio::stripe_pages: stripe_pages: | Page 0, range [0, 64K) | Page 1 ... stripe_sectors: | | | ... | | | | \- sector 15, page 0, pgoff=60K | \- sector 1, page 0, pgoff=4K \---- sector 0, page 0, pfoff=0 With such structure, we can represent subpage sectors without using extra pages. Here we introduce a new helper, index_stripe_sectors(), to update stripe_sectors[] to point to correct page and pgoff. So every time rbio::stripe_pages[] pointer gets updated, the new helper should be called. The following functions have to call the new helper: - steal_rbio() - alloc_rbio_pages() - alloc_rbio_parity_pages() - alloc_rbio_essential_pages() Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
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arch | ||
block | ||
certs | ||
crypto | ||
Documentation | ||
drivers | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
LICENSES | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
tools | ||
usr | ||
virt | ||
.clang-format | ||
.cocciconfig | ||
.get_maintainer.ignore | ||
.gitattributes | ||
.gitignore | ||
.mailmap | ||
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.