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From: Jens Axboe <axboe@kernel.dk>
To: linux-kernel@vger.kernel.org
Cc: Jens Axboe <axboe@kernel.dk>
Subject: [PATCH 058/437] fs: add IOCB_VECTORED flags
Date: Thu, 11 Apr 2024 09:13:18 -0600
Message-ID: <20240411153126.16201-59-axboe@kernel.dk>
In-Reply-To: <20240411153126.16201-1-axboe@kernel.dk>
References: <20240411153126.16201-1-axboe@kernel.dk>
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This allows a user of ->read_iter() or ->write_iter() to tell if this
request originally came as a readv/writev, or if it was a normal
read/write operation.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 fs/read_write.c    | 1 +
 include/linux/fs.h | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/fs/read_write.c b/fs/read_write.c
index 1d035293607b..efddd395d436 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -733,6 +733,7 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
 	ret = kiocb_set_rw_flags(&kiocb, flags);
 	if (ret)
 		return ret;
+	kiocb.ki_flags |= IOCB_VECTORED;
 	kiocb.ki_pos = (ppos ? *ppos : 0);
 
 	if (type == READ)
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 483c70d3941e..69e4dfac2853 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -346,6 +346,8 @@ struct readahead_control;
 #define IOCB_DIO_CALLER_COMP	(1 << 22)
 /* kiocb is a read or write operation submitted by fs/aio.c. */
 #define IOCB_AIO_RW		(1 << 23)
+/* came from readv/writev */
+#define IOCB_VECTORED		(1 << 24)
 
 /* for use in trace events */
 #define TRACE_IOCB_STRINGS \
-- 
2.43.0