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From:   Pavel Begunkov <asml.silence@gmail.com>
To:     io-uring@vger.kernel.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     "David S . Miller" <davem@davemloft.net>,
        Jakub Kicinski <kuba@kernel.org>,
        Jonathan Lemon <jonathan.lemon@gmail.com>,
        Willem de Bruijn <willemb@google.com>,
        Jens Axboe <axboe@kernel.dk>, David Ahern <dsahern@kernel.org>,
        kernel-team@fb.com, Pavel Begunkov <asml.silence@gmail.com>
Subject: [PATCH net-next v5 24/27] io_uring: rename IORING_OP_FILES_UPDATE
Date:   Tue, 12 Jul 2022 21:52:48 +0100
Message-Id: <0a907133907d9af3415a8a7aa1802c6aa97c03c6.1657643355.git.asml.silence@gmail.com>
In-Reply-To: <cover.1657643355.git.asml.silence@gmail.com>
References: <cover.1657643355.git.asml.silence@gmail.com>
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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@gmail.com>
---
 include/uapi/linux/io_uring.h | 12 +++++++++++-
 io_uring/opdef.c              |  9 +++++----
 io_uring/rsrc.c               | 17 +++++++++++++++--
 io_uring/rsrc.h               |  4 ++--
 4 files changed, 33 insertions(+), 9 deletions(-)

diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 7d21fba54b62..37e8c104d31f 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -171,7 +171,8 @@ 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,
@@ -220,6 +221,7 @@ 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
@@ -286,6 +288,14 @@ enum io_uring_op {
  */
 #define IORING_ACCEPT_MULTISHOT	(1U << 0)
 
+
+/*
+ * IORING_OP_RSRC_UPDATE flags
+ */
+enum {
+	IORING_RSRC_UPDATE_FILES,
+};
+
 /*
  * IORING_OP_MSG_RING command types, stored in sqe->addr
  */
diff --git a/io_uring/opdef.c b/io_uring/opdef.c
index 7ab19bbf3126..72dd2b2d8a9d 100644
--- a/io_uring/opdef.c
+++ b/io_uring/opdef.c
@@ -246,12 +246,13 @@ const struct io_op_def io_op_defs[] = {
 		.prep			= io_close_prep,
 		.issue			= io_close,
 	},
-	[IORING_OP_FILES_UPDATE] = {
+	[IORING_OP_RSRC_UPDATE] = {
 		.audit_skip		= 1,
 		.iopoll			= 1,
-		.name			= "FILES_UPDATE",
-		.prep			= io_files_update_prep,
-		.issue			= io_files_update,
+		.name			= "RSRC_UPDATE",
+		.prep			= io_rsrc_update_prep,
+		.issue			= io_rsrc_update,
+		.ioprio			= 1,
 	},
 	[IORING_OP_STATX] = {
 		.audit_skip		= 1,
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 1182cf0ea1fc..98ce8a93a816 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -21,6 +21,7 @@ struct io_rsrc_update {
 	u64				arg;
 	u32				nr_args;
 	u32				offset;
+	int				type;
 };
 
 static int io_sqe_buffer_register(struct io_ring_ctx *ctx, struct iovec *iov,
@@ -658,7 +659,7 @@ __cold int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
 	return -EINVAL;
 }
 
-int io_files_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+int io_rsrc_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 {
 	struct io_rsrc_update *up = io_kiocb_to_cmd(req);
 
@@ -672,6 +673,7 @@ int io_files_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
 	if (!up->nr_args)
 		return -EINVAL;
 	up->arg = READ_ONCE(sqe->addr);
+	up->type = READ_ONCE(sqe->ioprio);
 	return 0;
 }
 
@@ -711,7 +713,7 @@ static int io_files_update_with_index_alloc(struct io_kiocb *req,
 	return ret;
 }
 
-int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
+static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
 {
 	struct io_rsrc_update *up = io_kiocb_to_cmd(req);
 	struct io_ring_ctx *ctx = req->ctx;
@@ -740,6 +742,17 @@ int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
 	return IOU_OK;
 }
 
+int io_rsrc_update(struct io_kiocb *req, unsigned int issue_flags)
+{
+	struct io_rsrc_update *up = io_kiocb_to_cmd(req);
+
+	switch (up->type) {
+	case IORING_RSRC_UPDATE_FILES:
+		return io_files_update(req, issue_flags);
+	}
+	return -EINVAL;
+}
+
 int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
 			  struct io_rsrc_node *node, void *rsrc)
 {
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index af342fd239d0..21813a23215f 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -167,6 +167,6 @@ static inline u64 *io_get_tag_slot(struct io_rsrc_data *data, unsigned int idx)
 	return &data->tags[table_idx][off];
 }
 
-int io_files_update(struct io_kiocb *req, unsigned int issue_flags);
-int io_files_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
+int io_rsrc_update(struct io_kiocb *req, unsigned int issue_flags);
+int io_rsrc_update_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
 #endif
-- 
2.37.0