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| author | Christoph Hellwig <hch@lst.de> | 2018-06-19 15:10:57 -0700 |
|---|---|---|
| committer | Darrick J. Wong <darrick.wong@oracle.com> | 2018-06-19 15:10:57 -0700 |
| commit | 72b4daa241295440f98e80ae21294a67b27ca091 (patch) | |
| tree | b9a81093b52ce764bc8f2d76296c157ddeacb752 /include/linux/iomap.h | |
| parent | e184fde6f3f5353040dd4b5637f823fc87436e55 (diff) | |
| download | blackbird-obmc-linux-72b4daa241295440f98e80ae21294a67b27ca091.tar.gz blackbird-obmc-linux-72b4daa241295440f98e80ae21294a67b27ca091.zip | |
iomap: add an iomap-based readpage and readpages implementation
Simply use iomap_apply to iterate over the file and a submit a bio for
each non-uptodate but mapped region and zero everything else. Note that
as-is this can not be used for file systems with a blocksize smaller than
the page size, but that support will be added later.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'include/linux/iomap.h')
| -rw-r--r-- | include/linux/iomap.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 1f36523d448a..30d314407f66 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -99,6 +99,9 @@ struct iomap_ops { ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, const struct iomap_ops *ops); +int iomap_readpage(struct page *page, const struct iomap_ops *ops); +int iomap_readpages(struct address_space *mapping, struct list_head *pages, + unsigned nr_pages, const struct iomap_ops *ops); int iomap_file_dirty(struct inode *inode, loff_t pos, loff_t len, const struct iomap_ops *ops); int iomap_zero_range(struct inode *inode, loff_t pos, loff_t len, |
