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| author | Huang Jianan <huangjianan@oppo.com> | 2021-08-05 03:35:59 +0300 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2021-08-09 19:14:42 +0300 |
| commit | a08e67a0280215f74eccf14fda81dd7fed6596ba (patch) | |
| tree | 604222ed7dd17b0c74c35b63f51334d0b7c0a3b8 /fs/erofs/internal.h | |
| parent | c500bee1c5b2f1d59b1081ac879d73268ab0ff17 (diff) | |
| download | linux-a08e67a0280215f74eccf14fda81dd7fed6596ba.tar.xz | |
erofs: iomap support for non-tailpacking DIO
Add iomap support for non-tailpacking uncompressed data in order to
support DIO and DAX.
Direct I/O is useful in certain scenarios for uncompressed files.
For example, double pagecache can be avoid by direct I/O when
loop device is used for uncompressed files containing upper layer
compressed filesystem.
This adds iomap DIO support for non-tailpacking cases first and
tail-packing inline files are handled in the follow-up patch.
Link: https://lore.kernel.org/r/20210805003601.183063-2-hsiangkao@linux.alibaba.com
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Huang Jianan <huangjianan@oppo.com>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'fs/erofs/internal.h')
| -rw-r--r-- | fs/erofs/internal.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h index 543c2ff97d30..2669c785d548 100644 --- a/fs/erofs/internal.h +++ b/fs/erofs/internal.h @@ -371,6 +371,7 @@ static inline int z_erofs_map_blocks_iter(struct inode *inode, #endif /* !CONFIG_EROFS_FS_ZIP */ /* data.c */ +extern const struct file_operations erofs_file_fops; struct page *erofs_get_meta_page(struct super_block *sb, erofs_blk_t blkaddr); /* inode.c */ |