linux-stable.git/include/linux/bio.h, branch v6.13.7

block: Make bio_iov_bvec_set() accept pointer to const iov_iter

2024-12-12T15:43:28+00:00

Make bio_iov_bvec_set() accept a pointer to const iov_iter, which means
that we can drop the undesirable casting to struct iov_iter pointer in
blk_rq_map_user_bvec().

Signed-off-by: John Garry 
Reviewed-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20241202115727.2320401-1-john.g.garry@oracle.com
Signed-off-by: Jens Axboe

block: lift bio_is_zone_append to bio.h

2024-11-11T16:06:45+00:00

Make bio_is_zone_append globally available, because file systems need
to use to check for a zone append bio in their end_io handlers to deal
with the block layer emulation.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Damien Le Moal 
Reviewed-by: Johannes Thumshirn 
Link: https://lore.kernel.org/r/20241104062647.91160-4-hch@lst.de
Signed-off-by: Jens Axboe

block: remove bio_add_zone_append_page

2024-10-31T16:54:25+00:00

This is only used by the nvmet zns passthrough code, which can trivially
just use bio_add_pc_page and do the sanity check for the max zone append
limit itself.

All future zoned file systems should follow the btrfs lead and let the
upper layers fill up bios unlimited by hardware constraints and split
them to the limits in the I/O submission handler.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Chaitanya Kulkarni 
Link: https://lore.kernel.org/r/20241030051859.280923-3-hch@lst.de
Signed-off-by: Jens Axboe

block: rework bio splitting

2024-08-29T10:32:32+00:00

The current setup with bio_may_exceed_limit and __bio_split_to_limits
is a bit of a mess.

Change it so that __bio_split_to_limits does all the work and is just
a variant of bio_split_to_limits that returns nr_segs.  This is done
by inlining it and instead have the various bio_split_* helpers directly
submit the potentially split bios.

To support btrfs, the rw version has a lower level helper split out
that just returns the offset to split.  This turns out to nicely clean
up the btrfs flow as well.

Signed-off-by: Christoph Hellwig 
Acked-by: David Sterba 
Reviewed-by: Damien Le Moal 
Tested-by: Hans Holmberg 
Reviewed-by: Hans Holmberg 
Link: https://lore.kernel.org/r/20240826173820.1690925-2-hch@lst.de
Signed-off-by: Jens Axboe

block: split integrity support out of bio.h

2024-07-03T16:21:15+00:00

Split struct bio_integrity_payload and the related prototypes out of
bio.h into a separate bio-integrity.h header so that it is only pulled
in by the few places that need it.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Anuj Gupta 
Reviewed-by: Kanchan Joshi 
Reviewed-by: Johannes Thumshirn 
Reviewed-by: Martin K. Petersen 
Link: https://lore.kernel.org/r/20240702151047.1746127-2-hch@lst.de
Signed-off-by: Jens Axboe

block: unmap and free user mapped integrity via submitter

2024-06-12T17:00:50+00:00

The user mapped intergity is copied back and unpinned by
bio_integrity_free which is a low-level routine. Do it via the submitter
rather than doing it in the low-level block layer code, to split the
submitter side from the consumer side of the bio.

Signed-off-by: Anuj Gupta 
Signed-off-by: Kanchan Joshi 
Reviewed-by: Christoph Hellwig 
Reviewed-by: Martin K. Petersen 
Reviewed-by: Ming Lei 
Link: https://lore.kernel.org/r/20240610111144.14647-1-anuj20.g@samsung.com
Signed-off-by: Jens Axboe

block: add a blk_alloc_discard_bio helper

2024-05-07T13:29:42+00:00

Factor out a helper from __blkdev_issue_discard that chews off as much as
possible from a discard range and allocates a bio for it.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20240506042027.2289826-5-hch@lst.de
Signed-off-by: Jens Axboe

block: add a bio_chain_and_submit helper

2024-05-07T13:29:42+00:00

This is basically blk_next_bio just with the bio allocation moved
to the caller to allow for more flexible bio handling in the caller.

Signed-off-by: Christoph Hellwig 
Link: https://lore.kernel.org/r/20240506042027.2289826-4-hch@lst.de
Signed-off-by: Jens Axboe

block: add a bio_list_merge_init helper

2024-04-01T17:53:37+00:00

This is a simple combination of bio_list_merge + bio_list_init
similar to list_splice_init.  While it only saves a single
line in a callers, it makes the move all bios from one list to
another and reinitialize the original pattern a lot more obvious
in the callers.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Matthew Sakai 
Reviewed-by: Johannes Thumshirn 
Reviewed-by: Damien Le Moal 
Link: https://lore.kernel.org/r/20240328084147.2954434-2-hch@lst.de
Signed-off-by: Jens Axboe

block: Fix iterating over an empty bio with bio_for_each_folio_all

2024-01-16T22:02:25+00:00

If the bio contains no data, bio_first_folio() calls page_folio() on a
NULL pointer and oopses.  Move the test that we've reached the end of
the bio from bio_next_folio() to bio_first_folio().

Reported-by: syzbot+8b23309d5788a79d3eea@syzkaller.appspotmail.com
Reported-by: syzbot+004c1e0fced2b4bc3dcc@syzkaller.appspotmail.com
Fixes: 640d1930bef4 ("block: Add bio_for_each_folio_all()")
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Wilcox (Oracle) 
Link: https://lore.kernel.org/r/20240116212959.3413014-1-willy@infradead.org
[axboe: add unlikely() to error case]
Signed-off-by: Jens Axboe