[PATCH 12/21] iomap: Convert iomap_read_inline_data to take a folio
From: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Date: 2021-11-01 21:03:02
Also in:
linux-block, linux-fsdevel, lkml
Subsystem:
filesystems (vfs and infrastructure), filesystems [iomap], the rest · Maintainers:
Alexander Viro, Christian Brauner, Linus Torvalds
We still only support up to a single page of inline data (at least, per call to iomap_read_inline_data()), but it can now be written into the middle of a folio in case we decide to allocate a 16KiB page for a file that's 8.1KiB in size. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Reviewed-by: Darrick J. Wong <djwong@kernel.org> --- fs/iomap/buffered-io.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index dea577380215..b5e77d9de4a7 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c@@ -195,9 +195,8 @@ struct iomap_readpage_ctx { }; static loff_t iomap_read_inline_data(const struct iomap_iter *iter, - struct page *page) + struct folio *folio) { - struct folio *folio = page_folio(page); struct iomap_page *iop; const struct iomap *iomap = iomap_iter_srcmap(iter); size_t size = i_size_read(iter->inode) - iomap->offset;
@@ -205,7 +204,7 @@ static loff_t iomap_read_inline_data(const struct iomap_iter *iter, size_t offset = offset_in_folio(folio, iomap->offset); void *addr; - if (PageUptodate(page)) + if (folio_test_uptodate(folio)) return PAGE_SIZE - poff; if (WARN_ON_ONCE(size > PAGE_SIZE - poff))
@@ -220,7 +219,7 @@ static loff_t iomap_read_inline_data(const struct iomap_iter *iter, else iop = to_iomap_page(folio); - addr = kmap_local_page(page) + poff; + addr = kmap_local_folio(folio, offset); memcpy(addr, iomap->inline_data, size); memset(addr + size, 0, PAGE_SIZE - poff - size); kunmap_local(addr);
@@ -252,7 +251,7 @@ static loff_t iomap_readpage_iter(const struct iomap_iter *iter, sector_t sector; if (iomap->type == IOMAP_INLINE) - return min(iomap_read_inline_data(iter, page), length); + return min(iomap_read_inline_data(iter, folio), length); /* zero post-eof blocks as the page may be mapped */ iop = iomap_page_create(iter->inode, folio);
@@ -587,12 +586,13 @@ static int __iomap_write_begin(const struct iomap_iter *iter, loff_t pos, static int iomap_write_begin_inline(const struct iomap_iter *iter, struct page *page) { + struct folio *folio = page_folio(page); int ret; /* needs more work for the tailpacking case; disable for now */ if (WARN_ON_ONCE(iomap_iter_srcmap(iter)->offset != 0)) return -EIO; - ret = iomap_read_inline_data(iter, page); + ret = iomap_read_inline_data(iter, folio); if (ret < 0) return ret; return 0;
--
2.33.0