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Date: Fri, 24 Jul 2020 18:44:57 +0000 From: Satya Tangirala <satyat@...gle.com> To: linux-fscrypt@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-f2fs-devel@...ts.sourceforge.net, linux-ext4@...r.kernel.org Cc: linux-xfs@...r.kernel.org, Eric Biggers <ebiggers@...gle.com>, Satya Tangirala <satyat@...gle.com> Subject: [PATCH v6 3/7] iomap: support direct I/O with fscrypt using blk-crypto From: Eric Biggers <ebiggers@...gle.com> Set bio crypt contexts on bios by calling into fscrypt when required. No DUN contiguity checks are done - callers are expected to set up the iomap correctly to ensure that each bio submitted by iomap will not have blocks with incontiguous DUNs by calling fscrypt_limit_io_blocks() appropriately. Signed-off-by: Eric Biggers <ebiggers@...gle.com> Co-developed-by: Satya Tangirala <satyat@...gle.com> Signed-off-by: Satya Tangirala <satyat@...gle.com> --- fs/iomap/direct-io.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/fs/iomap/direct-io.c b/fs/iomap/direct-io.c index ec7b78e6feca..a8785bffdc7c 100644 --- a/fs/iomap/direct-io.c +++ b/fs/iomap/direct-io.c @@ -6,6 +6,7 @@ #include <linux/module.h> #include <linux/compiler.h> #include <linux/fs.h> +#include <linux/fscrypt.h> #include <linux/iomap.h> #include <linux/backing-dev.h> #include <linux/uio.h> @@ -183,11 +184,14 @@ static void iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos, unsigned len) { + struct inode *inode = file_inode(dio->iocb->ki_filp); struct page *page = ZERO_PAGE(0); int flags = REQ_SYNC | REQ_IDLE; struct bio *bio; bio = bio_alloc(GFP_KERNEL, 1); + fscrypt_set_bio_crypt_ctx(bio, inode, pos >> inode->i_blkbits, + GFP_KERNEL); bio_set_dev(bio, iomap->bdev); bio->bi_iter.bi_sector = iomap_sector(iomap, pos); bio->bi_private = dio; @@ -270,6 +274,8 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length, } bio = bio_alloc(GFP_KERNEL, nr_pages); + fscrypt_set_bio_crypt_ctx(bio, inode, pos >> inode->i_blkbits, + GFP_KERNEL); bio_set_dev(bio, iomap->bdev); bio->bi_iter.bi_sector = iomap_sector(iomap, pos); bio->bi_write_hint = dio->iocb->ki_hint; -- 2.28.0.rc0.142.g3c755180ce-goog
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