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io_uring: move uring_cmd handling to its own file
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
parent
cd40cae29e
commit
99f15d8d61
@ -4,5 +4,5 @@
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obj-$(CONFIG_IO_URING) += io_uring.o xattr.o nop.o fs.o splice.o \
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sync.o advise.o filetable.o \
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openclose.o
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openclose.o uring_cmd.o
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obj-$(CONFIG_IO_WQ) += io-wq.o
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@ -99,6 +99,7 @@
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#include "sync.h"
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#include "advise.h"
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#include "openclose.h"
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#include "uring_cmd.h"
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#define IORING_MAX_ENTRIES 32768
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#define IORING_MAX_CQ_ENTRIES (2 * IORING_MAX_ENTRIES)
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@ -473,14 +474,6 @@ struct io_cancel_data {
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int seq;
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};
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/*
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* The URING_CMD payload starts at 'cmd' in the first sqe, and continues into
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* the following sqe if SQE128 is used.
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*/
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#define uring_cmd_pdu_size(is_sqe128) \
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((1 + !!(is_sqe128)) * sizeof(struct io_uring_sqe) - \
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offsetof(struct io_uring_sqe, cmd))
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struct io_op_def {
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/* needs req->file assigned */
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unsigned needs_file : 1;
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@ -988,11 +981,6 @@ static bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task,
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return matched;
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}
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static inline bool req_has_async_data(struct io_kiocb *req)
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{
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return req->flags & REQ_F_ASYNC_DATA;
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}
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static inline void req_fail_link_node(struct io_kiocb *req, int res)
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{
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req_set_fail(req);
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@ -1743,7 +1731,7 @@ static void io_req_complete_post(struct io_kiocb *req)
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io_cqring_ev_posted(ctx);
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}
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static inline void __io_req_complete(struct io_kiocb *req, unsigned issue_flags)
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inline void __io_req_complete(struct io_kiocb *req, unsigned issue_flags)
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{
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if (issue_flags & IO_URING_F_COMPLETE_DEFER)
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req->flags |= REQ_F_COMPLETE_INLINE;
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@ -2151,7 +2139,7 @@ static void __io_req_task_work_add(struct io_kiocb *req,
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}
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}
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static void io_req_task_work_add(struct io_kiocb *req)
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void io_req_task_work_add(struct io_kiocb *req)
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{
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struct io_uring_task *tctx = req->task->io_uring;
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@ -3268,7 +3256,7 @@ static void io_req_map_rw(struct io_kiocb *req, const struct iovec *iovec,
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}
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}
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static inline bool io_alloc_async_data(struct io_kiocb *req)
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bool io_alloc_async_data(struct io_kiocb *req)
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{
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WARN_ON_ONCE(!io_op_defs[req->opcode].async_size);
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req->async_data = kmalloc(io_op_defs[req->opcode].async_size, GFP_KERNEL);
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@ -3714,111 +3702,6 @@ out_free:
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return ret;
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}
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static void io_uring_cmd_work(struct io_kiocb *req, bool *locked)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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ioucmd->task_work_cb(ioucmd);
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}
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void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *))
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{
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struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
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ioucmd->task_work_cb = task_work_cb;
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req->io_task_work.func = io_uring_cmd_work;
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io_req_task_work_add(req);
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}
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EXPORT_SYMBOL_GPL(io_uring_cmd_complete_in_task);
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static inline void io_req_set_cqe32_extra(struct io_kiocb *req,
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u64 extra1, u64 extra2)
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{
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req->extra1 = extra1;
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req->extra2 = extra2;
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req->flags |= REQ_F_CQE32_INIT;
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}
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/*
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* Called by consumers of io_uring_cmd, if they originally returned
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* -EIOCBQUEUED upon receiving the command.
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*/
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void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2)
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{
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struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
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if (ret < 0)
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req_set_fail(req);
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io_req_set_res(req, 0, ret);
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if (req->ctx->flags & IORING_SETUP_CQE32)
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io_req_set_cqe32_extra(req, res2, 0);
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__io_req_complete(req, 0);
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}
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EXPORT_SYMBOL_GPL(io_uring_cmd_done);
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static int io_uring_cmd_prep_async(struct io_kiocb *req)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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size_t cmd_size;
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cmd_size = uring_cmd_pdu_size(req->ctx->flags & IORING_SETUP_SQE128);
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memcpy(req->async_data, ioucmd->cmd, cmd_size);
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return 0;
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}
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static int io_uring_cmd_prep(struct io_kiocb *req,
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const struct io_uring_sqe *sqe)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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if (sqe->rw_flags || sqe->__pad1)
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return -EINVAL;
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ioucmd->cmd = sqe->cmd;
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ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);
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return 0;
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}
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static int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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struct io_ring_ctx *ctx = req->ctx;
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struct file *file = req->file;
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int ret;
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if (!req->file->f_op->uring_cmd)
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return -EOPNOTSUPP;
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if (ctx->flags & IORING_SETUP_SQE128)
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issue_flags |= IO_URING_F_SQE128;
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if (ctx->flags & IORING_SETUP_CQE32)
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issue_flags |= IO_URING_F_CQE32;
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if (ctx->flags & IORING_SETUP_IOPOLL)
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issue_flags |= IO_URING_F_IOPOLL;
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if (req_has_async_data(req))
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ioucmd->cmd = req->async_data;
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ret = file->f_op->uring_cmd(ioucmd, issue_flags);
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if (ret == -EAGAIN) {
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if (!req_has_async_data(req)) {
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if (io_alloc_async_data(req))
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return -ENOMEM;
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io_uring_cmd_prep_async(req);
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}
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return -EAGAIN;
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}
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if (ret != -EIOCBQUEUED) {
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io_uring_cmd_done(ioucmd, ret, 0);
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return IOU_OK;
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}
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return IOU_ISSUE_SKIP_COMPLETE;
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}
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static int io_msg_ring_prep(struct io_kiocb *req,
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const struct io_uring_sqe *sqe)
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{
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@ -11533,8 +11416,6 @@ static int __init io_uring_init(void)
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BUILD_BUG_ON(sizeof(atomic_t) != sizeof(u32));
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BUILD_BUG_ON(sizeof(struct io_uring_cmd) > 64);
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for (i = 0; i < ARRAY_SIZE(io_op_defs); i++) {
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BUG_ON(!io_op_defs[i].prep);
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BUG_ON(!io_op_defs[i].issue);
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@ -25,6 +25,11 @@ static inline void io_req_set_res(struct io_kiocb *req, s32 res, u32 cflags)
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req->cqe.flags = cflags;
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}
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static inline bool req_has_async_data(struct io_kiocb *req)
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{
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return req->flags & REQ_F_ASYNC_DATA;
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}
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static inline void io_put_file(struct file *file)
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{
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if (file)
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@ -53,6 +58,8 @@ static inline void io_ring_submit_lock(struct io_ring_ctx *ctx,
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lockdep_assert_held(&ctx->uring_lock);
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}
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void __io_req_complete(struct io_kiocb *req, unsigned issue_flags);
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struct file *io_file_get_normal(struct io_kiocb *req, int fd);
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struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
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unsigned issue_flags);
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@ -65,5 +72,7 @@ int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
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void io_rsrc_node_switch(struct io_ring_ctx *ctx,
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struct io_rsrc_data *data_to_kill);
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bool io_is_uring_fops(struct file *file);
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bool io_alloc_async_data(struct io_kiocb *req);
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void io_req_task_work_add(struct io_kiocb *req);
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#endif
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115
io_uring/uring_cmd.c
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115
io_uring/uring_cmd.c
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@ -0,0 +1,115 @@
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// SPDX-License-Identifier: GPL-2.0
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/file.h>
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#include <linux/io_uring.h>
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#include <uapi/linux/io_uring.h>
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#include "io_uring_types.h"
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#include "io_uring.h"
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#include "uring_cmd.h"
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static void io_uring_cmd_work(struct io_kiocb *req, bool *locked)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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ioucmd->task_work_cb(ioucmd);
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}
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void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
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void (*task_work_cb)(struct io_uring_cmd *))
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{
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struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
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ioucmd->task_work_cb = task_work_cb;
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req->io_task_work.func = io_uring_cmd_work;
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io_req_task_work_add(req);
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}
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EXPORT_SYMBOL_GPL(io_uring_cmd_complete_in_task);
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static inline void io_req_set_cqe32_extra(struct io_kiocb *req,
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u64 extra1, u64 extra2)
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{
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req->extra1 = extra1;
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req->extra2 = extra2;
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req->flags |= REQ_F_CQE32_INIT;
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}
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/*
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* Called by consumers of io_uring_cmd, if they originally returned
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* -EIOCBQUEUED upon receiving the command.
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*/
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void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2)
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{
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struct io_kiocb *req = cmd_to_io_kiocb(ioucmd);
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if (ret < 0)
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req_set_fail(req);
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io_req_set_res(req, 0, ret);
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if (req->ctx->flags & IORING_SETUP_CQE32)
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io_req_set_cqe32_extra(req, res2, 0);
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__io_req_complete(req, 0);
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}
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EXPORT_SYMBOL_GPL(io_uring_cmd_done);
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int io_uring_cmd_prep_async(struct io_kiocb *req)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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size_t cmd_size;
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cmd_size = uring_cmd_pdu_size(req->ctx->flags & IORING_SETUP_SQE128);
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memcpy(req->async_data, ioucmd->cmd, cmd_size);
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return 0;
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}
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int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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if (sqe->rw_flags || sqe->__pad1)
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return -EINVAL;
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ioucmd->cmd = sqe->cmd;
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ioucmd->cmd_op = READ_ONCE(sqe->cmd_op);
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return 0;
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}
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int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req);
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struct io_ring_ctx *ctx = req->ctx;
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struct file *file = req->file;
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int ret;
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if (!req->file->f_op->uring_cmd)
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return -EOPNOTSUPP;
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if (ctx->flags & IORING_SETUP_SQE128)
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issue_flags |= IO_URING_F_SQE128;
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if (ctx->flags & IORING_SETUP_CQE32)
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issue_flags |= IO_URING_F_CQE32;
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if (ctx->flags & IORING_SETUP_IOPOLL)
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issue_flags |= IO_URING_F_IOPOLL;
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if (req_has_async_data(req))
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ioucmd->cmd = req->async_data;
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ret = file->f_op->uring_cmd(ioucmd, issue_flags);
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if (ret == -EAGAIN) {
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if (!req_has_async_data(req)) {
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if (io_alloc_async_data(req))
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return -ENOMEM;
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io_uring_cmd_prep_async(req);
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}
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return -EAGAIN;
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}
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if (ret != -EIOCBQUEUED) {
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io_uring_cmd_done(ioucmd, ret, 0);
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return IOU_OK;
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}
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return IOU_ISSUE_SKIP_COMPLETE;
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}
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13
io_uring/uring_cmd.h
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13
io_uring/uring_cmd.h
Normal file
@ -0,0 +1,13 @@
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// SPDX-License-Identifier: GPL-2.0
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int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags);
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int io_uring_cmd_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
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int io_uring_cmd_prep_async(struct io_kiocb *req);
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/*
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* The URING_CMD payload starts at 'cmd' in the first sqe, and continues into
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* the following sqe if SQE128 is used.
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*/
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#define uring_cmd_pdu_size(is_sqe128) \
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((1 + !!(is_sqe128)) * sizeof(struct io_uring_sqe) - \
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offsetof(struct io_uring_sqe, cmd))
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