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path: root/fs/bcachefs/compress.c
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2023-10-23bcachefs: GFP_NOIO -> GFP_NOFSKent Overstreet1-6/+6
GFP_NOIO dates from the bcache days, when we operated under the block layer. Now, GFP_NOFS is more appropriate, so switch all GFP_NOIO uses to GFP_NOFS. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Private error codes: ENOMEMKent Overstreet1-33/+32
This adds private error codes for most (but not all) of our ENOMEM uses, which makes it easier to track down assorted allocation failures. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: __bio_compress() fix up.Daniel Hill1-1/+1
A single block can't be compressed, so it's incompressible. This stops rebalance repeatably marking extents as uncompressed. Signed-off-by: Daniel Hill <daniel@gluo.nz> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Turn encoded_extent_max into a regular optionKent Overstreet1-11/+10
It'll now be handled at format time and in sysfs like other options - it still can only be set at format time, though. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2023-10-23bcachefs: Option improvementsKent Overstreet1-1/+1
This adds flags for options that must be a power of two (block size and btree node size), and options that are stored in the superblock as a power of two (encoded extent max). Also: options are now stored in memory in the same units they're displayed in (bytes): we now convert when getting and setting from the superblock. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
2023-10-23bcachefs: Work around a zstd bugKent Overstreet1-1/+12
The zstd compression code seems to have a bug where it will write just past the end of the destination buffer - probably only when the compressed output isn't going to fit in the destination buffer, which will never happen if you're always allocating a bigger buffer than the source buffer which would explain other users not hitting it. But, we size the buffer according to how much contiguous space on disk we have, so... generally, bugs like this don't write more than a word past the end of the buffer, so an easy workaround is to subtract a fudge factor from the buffer size. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Improve check for when bios are physically contiguousKent Overstreet1-1/+1
Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Wrap write path in memalloc_nofs_save()Kent Overstreet1-5/+1
This fixes a lockdep splat where we're allocating memory with vmalloc in the compression bounce path, which doesn't always obey GFP_NOFS. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Add vmalloc fallback for decompress workspaceKent Overstreet1-1/+1
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Wrap vmap() in memalloc_nofs_save()/restore()Kent Overstreet1-1/+5
vmalloc() and vmap() don't take GFP_NOFS - this should be pushed further up the IO path, but for now just doing the simple fix. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Fix initialization of bounce mempoolsKent Overstreet1-9/+9
When they were converted to kvpmalloc pools they weren't converted to pass the actual size of the allocation. Oops. Also, validate the real length in the zstd decompression path. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Some compression improvementsKent Overstreet1-16/+37
In __bio_map_or_bounce(), the check for if the bio is physically contiguous is improved; it's now more readable and handles multi page but contiguous bios. Also when decompressing, we were doing a redundant memcpy in the case where we were able to use vmap to map a bio contigiously. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Use kvpmalloc mempools for compression bounceKent Overstreet1-20/+5
This fixes an issue where mounting would fail because of memory fragmentation - previously the compression bounce buffers were using get_free_pages(). Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Track incompressible dataKent Overstreet1-1/+1
This fixes the background_compression option: wihout some way of marking data as incompressible, rebalance will keep rewriting incompressible data over and over. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Convert some enums to x-macrosKent Overstreet1-19/+19
Helps for preventing things from getting out of sync. Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Fix moving compressed dataKent Overstreet1-12/+3
bio_uncompress_inplace() used to potentially need to extend the bio to be big enough for the uncompressed data, which has become problematic with multipage bvecs - but, the move extent path actually already allocated the bios to be big enough for the uncompressed data. The promote path needed to be fixed, though. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: kill bio_for_each_contig_segment()Kent Overstreet1-1/+1
With multipage bvecs it's not needed anymore Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Kill direct access to bi_io_vecKent Overstreet1-1/+10
Switch to always using bio_add_page(), which merges contiguous pages now that we have multipage bvecs. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: fix mempool double initializationKent Overstreet1-5/+7
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
2023-10-23bcachefs: Initial commitKent Overstreet1-0/+621
Initially forked from drivers/md/bcache, bcachefs is a new copy-on-write filesystem with every feature you could possibly want. Website: https://bcachefs.org Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
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