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From: Satya Tangirala <satyat@google.com>
To: linux-fscrypt@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-f2fs-devel@lists.sourceforge.net,
	linux-ext4@vger.kernel.org
Cc: linux-xfs@vger.kernel.org, Eric Biggers <ebiggers@google.com>,
	Satya Tangirala <satyat@google.com>
Subject: [PATCH v5 3/7] iomap: support direct I/O with fscrypt using blk-crypto
Date: Fri, 24 Jul 2020 12:11:39 +0000	[thread overview]
Message-ID: <20200724121143.1589121-4-satyat@google.com> (raw)
In-Reply-To: <20200724121143.1589121-1-satyat@google.com>

From: Eric Biggers <ebiggers@google.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@google.com>
Co-developed-by: Satya Tangirala <satyat@google.com>
Signed-off-by: Satya Tangirala <satyat@google.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


  parent reply	other threads:[~2020-07-24 12:12 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-24 12:11 [PATCH v5 0/7] add support for " Satya Tangirala
2020-07-24 12:11 ` [PATCH v5 1/7] fscrypt: Add functions for direct I/O support Satya Tangirala
2020-07-24 16:46   ` Eric Biggers
2020-07-24 12:11 ` [PATCH v5 2/7] direct-io: add support for fscrypt using blk-crypto Satya Tangirala
2020-07-24 12:11 ` Satya Tangirala [this message]
2020-07-24 12:11 ` [PATCH v5 4/7] ext4: support direct I/O with " Satya Tangirala
2020-07-24 12:11 ` [PATCH v5 5/7] f2fs: " Satya Tangirala
2020-07-24 12:11 ` [PATCH v5 6/7] fscrypt: document inline encryption support Satya Tangirala
2020-07-24 12:11 ` [PATCH v5 7/7] fscrypt: update documentation for direct I/O support Satya Tangirala

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