linux.git/fs/btrfs/ordered-data.h, branch v6.3

btrfs: don't rely on unchanging ->bi_bdev for zone append remaps

2023-02-15T18:38:55+00:00

btrfs_record_physical_zoned relies on a bio->bi_bdev samples in the
bio_end_io handler to find the reverse map for remapping the zone append
write, but stacked block device drivers can and usually do change bi_bdev
when sending on the bio to a lower device.  This can happen e.g. with the
nvme-multipath driver when a NVMe SSD sets the shared namespace bit.

But there is no real need for the bdev in btrfs_record_physical_zoned,
as it is only passed to btrfs_rmap_block, which uses it to pick the
mapping to report if there are multiple reverse mappings.  As zone
writes can only do simple non-mirror writes right now, and anything
more complex will use the stripe tree there is no chance of the multiple
mappings case actually happening.

Instead open code the subset of btrfs_rmap_block in
btrfs_record_physical_zoned, which also removes a memory allocation and
remove the bdev field in the ordered extent.

Fixes: d8e3fb106f39 ("btrfs: zoned: use ZONE_APPEND write for zoned mode")
Reviewed-by: Josef Bacik 
Signed-off-by: Christoph Hellwig 
Signed-off-by: David Sterba

btrfs: remove the wait argument to btrfs_start_ordered_extent

2023-02-13T16:50:34+00:00

Given that wait is always set to 1, so remove the argument.
Last use of wait with 0 was in 0c304304feab ("Btrfs: remove
csum_bytes_left").

Reviewed-by: Johannes Thumshirn 
Signed-off-by: Christoph Hellwig 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: use cached_state for btrfs_check_nocow_lock

2022-12-05T17:00:36+00:00

Now that try_lock_extent() takes a cached_state, plumb the cached_state
through btrfs_try_lock_ordered_range() and then use a cached_state in
btrfs_check_nocow_lock everywhere to avoid extra tree searches on the
extent_io_tree.

Reviewed-by: Filipe Manana 
Signed-off-by: Josef Bacik 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: add btrfs_try_lock_ordered_range

2022-09-29T15:08:28+00:00

For IOCB_NOWAIT we're going to want to use try lock on the extent lock,
and simply bail if there's an ordered extent in the range because the
only choice there is to wait for the ordered extent to complete.

Reviewed-by: Filipe Manana 
Signed-off-by: Josef Bacik 
Signed-off-by: Stefan Roesch 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: move btrfs_ordered_sum_size into file-item.c

2022-09-26T10:28:06+00:00

This is defined in ordered-data.h, but is only used in file-item.c.
Move this to file-item.c as it doesn't need to be global.

Reviewed-by: Johannes Thumshirn 
Reviewed-by: Anand Jain 
Signed-off-by: Josef Bacik 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: remove the finish_func argument to btrfs_mark_ordered_io_finished

2022-07-25T15:45:37+00:00

finish_func is always set to finish_ordered_fn, so remove it and also
the now pointless and somewhat confusingly named
__endio_write_update_ordered wrapper.

Reviewed-by: Nikolay Borisov 
Signed-off-by: Christoph Hellwig 
Signed-off-by: David Sterba

btrfs: add BTRFS_IOC_ENCODED_WRITE

2022-03-14T12:13:51+00:00

The implementation resembles direct I/O: we have to flush any ordered
extents, invalidate the page cache, and do the io tree/delalloc/extent
map/ordered extent dance. From there, we can reuse the compression code
with a minor modification to distinguish the write from writeback. This
also creates inline extents when possible.

Signed-off-by: Omar Sandoval 
Signed-off-by: David Sterba

btrfs: add ram_bytes and offset to btrfs_ordered_extent

2022-03-14T12:13:51+00:00

Currently, we only create ordered extents when ram_bytes == num_bytes
and offset == 0. However, BTRFS_IOC_ENCODED_WRITE writes may create
extents which only refer to a subset of the full unencoded extent, so we
need to plumb these fields through the ordered extent infrastructure and
pass them down to insert_reserved_file_extent().

Since we're changing the btrfs_add_ordered_extent* signature, let's get
rid of the trivial wrappers and add a kernel-doc.

Reviewed-by: Nikolay Borisov 
Reviewed-by: Josef Bacik 
Signed-off-by: Omar Sandoval 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: remove uptodate parameter from btrfs_dec_test_first_ordered_pending

2021-08-23T11:19:02+00:00

In commit e65f152e4348 ("btrfs: refactor how we finish ordered extent io
for endio functions") there was last caller not using 1 for the uptodate
parameter. Now there's only one, passing 1, so we can remove it and
simplify the code.

Reviewed-by: Qu Wenruo 
Signed-off-by: David Sterba

btrfs: store a block_device in struct btrfs_ordered_extent

2021-07-22T13:50:15+00:00

Store the block device instead of the gendisk in the btrfs_ordered_extent
structure instead of acquiring a reference to it later.

Note: this is from series removing bdgrab/bdput, btrfs is one of the
last users.

Signed-off-by: Christoph Hellwig 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba