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Wed, 21 Oct 2026 03:40:05 +0000 From: Qu Wenruo To: linux-btrfs@vger.kernel.org Subject: [PATCH v2 0/9] btrfs: prepare for variable stripe_len Date: Wed, 21 Oct 2026 14:09:34 +1030 Message-ID: X-Mailer: git-send-email 2.56.0 X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Rspamd-Action: no action X-Spam-Score: -3.01 X-Spam-Flag: NO X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; URIBL_BLOCKED(0.00)[suse.com:dkim,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCPT_COUNT_ONE(0.00)[1]; ARC_NA(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; DKIM_TRACE(0.00)[suse.com:+]; MIME_TRACE(0.00)[0:+]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; TO_DN_NONE(0.00)[]; PREVIOUSLY_DELIVERED(0.00)[linux-btrfs@vger.kernel.org]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_VIA_SMTP_AUTH(0.00)[]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim,imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns] X-Spam-Level: X-Rspamd-Queue-Id: 80FDF1F7E9 X-Rspamd-Server: rspamd2.dmz-prg2.suse.org [CHANGELOG] v2: - Use IS_ALINGED() when possible Mostly affecting zoned.c - Refactor is_same_chunk_map() Not only reduce the length of the parameter list, but also make it easier to expand, with extra unlikely() calls. - Refactor alloc_scrub_bbio() Since the @private is always a scrub_stripe pointer, use scrub_stripe as the type instead, so we can grab stripe_len without introducing a new parameter. All are suggested by Johannes. This is a preparation patchset, to support a stripe_len that is not 64KiB. This is for the future variable stripe length RAID56 feature, where RAID56_VSL profile is allowed for data chunks, and the stripe_len can be as small as sectorsize, meanwhile data IO are kept to be aligned to data_size, which is power of 2, and larger than sector size. Finally, RAID56_VSL will always have a number of devices that nr_data == data_size / sector_size. So that's why we want a variable stripe_len. This series does all the preparation, including supporting stripe_len < PAGE_SIZE. For now, tree-checker will still reject stripe_len != 64K, but that limit will be removed when RAID56_VSL feature is introduced and can be properly tested. Qu Wenruo (9): btrfs: reduce the width of num_stripes and sub_stripes btrfs: load the on-disk btrfs_chunk::stripe_len btrfs: add btrfs_io_context::stripe_len and load it btrfs: change scrub to use stripe_len btrfs: add a new 'stripe_len' parameter to btrfs_stripe_nr_to_offset() btrfs: convert volumes.c and block-group.c to use map->stripe_len btrfs: convert raid56.c to use rbio->bioc->stripe_len btrfs: convert zoned.c to use map->stripe_len btrfs: introduce extra limits on btrfs_chunk::stripe_len fs/btrfs/block-group.c | 9 +-- fs/btrfs/raid56.c | 57 ++++++++++++------ fs/btrfs/raid56.h | 7 +-- fs/btrfs/scrub.c | 129 ++++++++++++++++++++++++++-------------- fs/btrfs/tree-checker.c | 13 +++- fs/btrfs/volumes.c | 95 +++++++++++++++++++---------- fs/btrfs/volumes.h | 16 +++-- fs/btrfs/zoned.c | 56 +++++++++-------- 8 files changed, 246 insertions(+), 136 deletions(-) -- 2.56.0