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authorLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 21:51:41 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2022-01-12 21:51:41 +0100
commitf079ab01b5609fb0c9acc52c88168bf1eed82373 (patch)
tree5aad58bbda19fce4acf46fef24b90b896c9b9023 /block
parentMerge tag 'folio-5.17' of git://git.infradead.org/users/willy/pagecache (diff)
parentiomap: Inline __iomap_zero_iter into its caller (diff)
downloadlinux-f079ab01b5609fb0c9acc52c88168bf1eed82373.tar.xz
linux-f079ab01b5609fb0c9acc52c88168bf1eed82373.zip
Merge tag 'iomap-5.17' of git://git.infradead.org/users/willy/linux
Pull iomap updates from Matthew Wilcox: "Convert xfs/iomap to use folios. This should be all that is needed for XFS to use large folios. There is no code in this pull request to create large folios, but no additional changes should be needed to XFS or iomap once they are created. Usually this would have come from Darrick, and we had intended that it would come that route. Between the holidays and various things which Darrick needed to work on, he asked if I could send things directly. There weren't any other iomap patches pending for this release, which probably also played a role" * tag 'iomap-5.17' of git://git.infradead.org/users/willy/linux: (26 commits) iomap: Inline __iomap_zero_iter into its caller xfs: Support large folios iomap: Support large folios in invalidatepage iomap: Convert iomap_migrate_page() to use folios iomap: Convert iomap_add_to_ioend() to take a folio iomap: Simplify iomap_do_writepage() iomap: Simplify iomap_writepage_map() iomap,xfs: Convert ->discard_page to ->discard_folio iomap: Convert iomap_write_end_inline to take a folio iomap: Convert iomap_write_begin() and iomap_write_end() to folios iomap: Convert __iomap_zero_iter to use a folio iomap: Allow iomap_write_begin() to be called with the full length iomap: Convert iomap_page_mkwrite to use a folio iomap: Convert readahead and readpage to use a folio iomap: Convert iomap_read_inline_data to take a folio iomap: Use folio offsets instead of page offsets iomap: Convert bio completions to use folios iomap: Pass the iomap_page into iomap_set_range_uptodate iomap: Add iomap_invalidate_folio iomap: Convert iomap_releasepage to use a folio ...
Diffstat (limited to 'block')
-rw-r--r--block/bio.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/block/bio.c b/block/bio.c
index 6fadc977cd7f..0d400ba2dbd1 100644
--- a/block/bio.c
+++ b/block/bio.c
@@ -1035,6 +1035,28 @@ int bio_add_page(struct bio *bio, struct page *page,
}
EXPORT_SYMBOL(bio_add_page);
+/**
+ * bio_add_folio - Attempt to add part of a folio to a bio.
+ * @bio: BIO to add to.
+ * @folio: Folio to add.
+ * @len: How many bytes from the folio to add.
+ * @off: First byte in this folio to add.
+ *
+ * Filesystems that use folios can call this function instead of calling
+ * bio_add_page() for each page in the folio. If @off is bigger than
+ * PAGE_SIZE, this function can create a bio_vec that starts in a page
+ * after the bv_page. BIOs do not support folios that are 4GiB or larger.
+ *
+ * Return: Whether the addition was successful.
+ */
+bool bio_add_folio(struct bio *bio, struct folio *folio, size_t len,
+ size_t off)
+{
+ if (len > UINT_MAX || off > UINT_MAX)
+ return 0;
+ return bio_add_page(bio, &folio->page, len, off) > 0;
+}
+
void __bio_release_pages(struct bio *bio, bool mark_dirty)
{
struct bvec_iter_all iter_all;