erofs: support I/O submission for sub-page compressed blocks

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Add a basic I/O submission path first to support sub-page blocks:

 - Temporary short-lived pages will be used entirely;

 - In-place I/O pages can be used partially, but compressed pages need
   to be able to be mapped in contiguous virtual memory.

As a start, currently cache decompression is explicitly disabled for
sub-page blocks, which will be supported in the future.

Reviewed-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20231206091057.87027-2-hsiangkao@linux.alibaba.com

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This commit is contained in:

Gao Xiang 2023-12-06 17:10:53 +08:00

parent 3c12466b6b

commit 192351616a

1 changed files with 74 additions and 82 deletions

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fs/erofs/zdata.c

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