From b2f35ac4146d32d4424aaa941bbc681f12c1b9e6 Mon Sep 17 00:00:00 2001 From: Joanne Koong Date: Thu, 25 Sep 2025 17:26:04 -0700 Subject: iomap: add caller-provided callbacks for read and readahead Add caller-provided callbacks for read and readahead so that it can be used generically, especially by filesystems that are not block-based. In particular, this: * Modifies the read and readahead interface to take in a struct iomap_read_folio_ctx that is publicly defined as: struct iomap_read_folio_ctx { const struct iomap_read_ops *ops; struct folio *cur_folio; struct readahead_control *rac; void *read_ctx; }; where struct iomap_read_ops is defined as: struct iomap_read_ops { int (*read_folio_range)(const struct iomap_iter *iter, struct iomap_read_folio_ctx *ctx, size_t len); void (*read_submit)(struct iomap_read_folio_ctx *ctx); }; read_folio_range() reads in the folio range and is required by the caller to provide. read_submit() is optional and is used for submitting any pending read requests. * Modifies existing filesystems that use iomap for read and readahead to use the new API, through the new statically inlined helpers iomap_bio_read_folio() and iomap_bio_readahead(). There is no change in functionality for those filesystems. Signed-off-by: Joanne Koong Signed-off-by: Christian Brauner --- fs/xfs/xfs_aops.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'fs/xfs/xfs_aops.c') diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index a26f79815533..0c2ed00733f2 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -742,14 +742,15 @@ xfs_vm_read_folio( struct file *unused, struct folio *folio) { - return iomap_read_folio(folio, &xfs_read_iomap_ops); + iomap_bio_read_folio(folio, &xfs_read_iomap_ops); + return 0; } STATIC void xfs_vm_readahead( struct readahead_control *rac) { - iomap_readahead(rac, &xfs_read_iomap_ops); + iomap_bio_readahead(rac, &xfs_read_iomap_ops); } static int -- cgit