linux-kernel - [RFC net-next v3 19/29] io_uring: rename IORING_OP_FILES

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Date:   Tue, 28 Jun 2022 19:56:41 +0100
From:   Pavel Begunkov <asml.silence@...il.com>
To:     io-uring@...r.kernel.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc:     "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Jonathan Lemon <jonathan.lemon@...il.com>,
        Willem de Bruijn <willemb@...gle.com>,
        Jens Axboe <axboe@...nel.dk>, kernel-team@...com,
        Pavel Begunkov <asml.silence@...il.com>
Subject: [RFC net-next v3 19/29] io_uring: rename IORING_OP_FILES_UPDATE

IORING_OP_FILES_UPDATE will be a more generic opcode serving different
resource types, rename it into IORING_OP_RSRC_UPDATE and add subtype
handling.

Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
 fs/io_uring.c                 | 23 +++++++++++++++++------
 include/uapi/linux/io_uring.h | 12 +++++++++++-
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/fs/io_uring.c b/fs/io_uring.c
index 22427893549a..e9fc7e076c7f 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -730,6 +730,7 @@ struct io_rsrc_update {
 	u64				arg;
 	u32				nr_args;
 	u32				offset;
+	unsigned			type;
 };
 
 struct io_fadvise {
@@ -1280,7 +1281,7 @@ static const struct io_op_def io_op_defs[] = {
 	},
 	[IORING_OP_OPENAT] = {},
 	[IORING_OP_CLOSE] = {},
-	[IORING_OP_FILES_UPDATE] = {
+	[IORING_OP_RSRC_UPDATE] = {
 		.audit_skip		= 1,
 		.iopoll			= 1,
 	},
@@ -8268,7 +8269,7 @@ static int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
 	return 0;
 }
 
-static int io_files_update_prep(struct io_kiocb *req,
+static int io_rsrc_update_prep(struct io_kiocb *req,
 				const struct io_uring_sqe *sqe)
 {
 	if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
@@ -8280,6 +8281,7 @@ static int io_files_update_prep(struct io_kiocb *req,
 	req->rsrc_update.nr_args = READ_ONCE(sqe->len);
 	if (!req->rsrc_update.nr_args)
 		return -EINVAL;
+	req->rsrc_update.type = READ_ONCE(sqe->ioprio);
 	req->rsrc_update.arg = READ_ONCE(sqe->addr);
 	return 0;
 }
@@ -8308,6 +8310,15 @@ static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
 	return 0;
 }
 
+static int io_rsrc_update(struct io_kiocb *req, unsigned int issue_flags)
+{
+	switch (req->rsrc_update.type) {
+	case IORING_RSRC_UPDATE_FILES:
+		return io_files_update(req, issue_flags);
+	}
+	return -EINVAL;
+}
+
 static int io_req_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
 	switch (req->opcode) {
@@ -8352,8 +8363,8 @@ static int io_req_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 		return io_openat_prep(req, sqe);
 	case IORING_OP_CLOSE:
 		return io_close_prep(req, sqe);
-	case IORING_OP_FILES_UPDATE:
-		return io_files_update_prep(req, sqe);
+	case IORING_OP_RSRC_UPDATE:
+		return io_rsrc_update_prep(req, sqe);
 	case IORING_OP_STATX:
 		return io_statx_prep(req, sqe);
 	case IORING_OP_FADVISE:
@@ -8661,8 +8672,8 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags)
 	case IORING_OP_CLOSE:
 		ret = io_close(req, issue_flags);
 		break;
-	case IORING_OP_FILES_UPDATE:
-		ret = io_files_update(req, issue_flags);
+	case IORING_OP_RSRC_UPDATE:
+		ret = io_rsrc_update(req, issue_flags);
 		break;
 	case IORING_OP_STATX:
 		ret = io_statx(req, issue_flags);
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 96193bbda2e4..5f574558b96c 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -162,7 +162,8 @@ enum io_uring_op {
 	IORING_OP_FALLOCATE,
 	IORING_OP_OPENAT,
 	IORING_OP_CLOSE,
-	IORING_OP_FILES_UPDATE,
+	IORING_OP_RSRC_UPDATE,
+	IORING_OP_FILES_UPDATE = IORING_OP_RSRC_UPDATE,
 	IORING_OP_STATX,
 	IORING_OP_READ,
 	IORING_OP_WRITE,
@@ -210,6 +211,7 @@ enum io_uring_op {
 #define IORING_TIMEOUT_ETIME_SUCCESS	(1U << 5)
 #define IORING_TIMEOUT_CLOCK_MASK	(IORING_TIMEOUT_BOOTTIME | IORING_TIMEOUT_REALTIME)
 #define IORING_TIMEOUT_UPDATE_MASK	(IORING_TIMEOUT_UPDATE | IORING_LINK_TIMEOUT_UPDATE)
+
 /*
  * sqe->splice_flags
  * extends splice(2) flags
@@ -258,6 +260,14 @@ enum io_uring_op {
  */
 #define IORING_ACCEPT_MULTISHOT	(1U << 0)
 
+
+/*
+ * IORING_OP_RSRC_UPDATE flags
+ */
+enum {
+	IORING_RSRC_UPDATE_FILES,
+};
+
 /*
  * IO completion data structure (Completion Queue Entry)
  */
-- 
2.36.1