From b66509b8497f2b002a2654e386a440f1274ddcc7 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 1 Dec 2023 00:57:35 +0000 Subject: io_uring: split out cmd api into a separate header linux/io_uring.h is slowly becoming a rubbish bin where we put anything exposed to other subsystems. For instance, the task exit hooks and io_uring cmd infra are completely orthogonal and don't need each other's definitions. Start cleaning it up by splitting out all command bits into a new header file. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/7ec50bae6e21f371d3850796e716917fc141225a.1701391955.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- include/linux/io_uring/cmd.h | 81 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) create mode 100644 include/linux/io_uring/cmd.h (limited to 'include/linux/io_uring') diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h new file mode 100644 index 000000000000..62fcfaf6fcc9 --- /dev/null +++ b/include/linux/io_uring/cmd.h @@ -0,0 +1,81 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#ifndef _LINUX_IO_URING_CMD_H +#define _LINUX_IO_URING_CMD_H + +#include +#include + +/* only top 8 bits of sqe->uring_cmd_flags for kernel internal use */ +#define IORING_URING_CMD_CANCELABLE (1U << 30) +#define IORING_URING_CMD_POLLED (1U << 31) + +struct io_uring_cmd { + struct file *file; + const struct io_uring_sqe *sqe; + union { + /* callback to defer completions to task context */ + void (*task_work_cb)(struct io_uring_cmd *cmd, unsigned); + /* used for polled completion */ + void *cookie; + }; + u32 cmd_op; + u32 flags; + u8 pdu[32]; /* available inline for free use */ +}; + +static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) +{ + return sqe->cmd; +} + +#if defined(CONFIG_IO_URING) +int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, + struct iov_iter *iter, void *ioucmd); +void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2, + unsigned issue_flags); +void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned), + unsigned flags); +/* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */ +void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)); + +static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ + __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); +} + +void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, + unsigned int issue_flags); +struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd); + +#else +static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, + struct iov_iter *iter, void *ioucmd) +{ + return -EOPNOTSUPP; +} +static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, + ssize_t ret2, unsigned issue_flags) +{ +} +static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ +} +static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ +} +static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, + unsigned int issue_flags) +{ +} +static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd) +{ + return NULL; +} +#endif + +#endif /* _LINUX_IO_URING_CMD_H */ -- cgit v1.2.3 From 6b04a3737057ddfed396c954f9e4be4fe6d53c62 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 1 Dec 2023 00:57:36 +0000 Subject: io_uring/cmd: inline io_uring_cmd_do_in_task_lazy Now as we can easily include io_uring_types.h, move IOU_F_TWQ_LAZY_WAKE and inline io_uring_cmd_do_in_task_lazy(). Signed-off-by: Pavel Begunkov Reviewed-by: Ming Lei Link: https://lore.kernel.org/r/2ec9fb31dd192d1c5cf26d0a2dec5657d88a8e48.1701391955.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- include/linux/io_uring/cmd.h | 31 ++++++++++++++++--------------- 1 file changed, 16 insertions(+), 15 deletions(-) (limited to 'include/linux/io_uring') diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h index 62fcfaf6fcc9..ee9b3bc3a4af 100644 --- a/include/linux/io_uring/cmd.h +++ b/include/linux/io_uring/cmd.h @@ -36,15 +36,6 @@ void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t res2, void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, void (*task_work_cb)(struct io_uring_cmd *, unsigned), unsigned flags); -/* users should follow semantics of IOU_F_TWQ_LAZY_WAKE */ -void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, - void (*task_work_cb)(struct io_uring_cmd *, unsigned)); - -static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, - void (*task_work_cb)(struct io_uring_cmd *, unsigned)) -{ - __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); -} void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, unsigned int issue_flags); @@ -60,12 +51,9 @@ static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, ssize_t ret2, unsigned issue_flags) { } -static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, - void (*task_work_cb)(struct io_uring_cmd *, unsigned)) -{ -} -static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, - void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +static inline void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned), + unsigned flags) { } static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, @@ -78,4 +66,17 @@ static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd } #endif +/* users must follow the IOU_F_TWQ_LAZY_WAKE semantics */ +static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ + __io_uring_cmd_do_in_task(ioucmd, task_work_cb, IOU_F_TWQ_LAZY_WAKE); +} + +static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, + void (*task_work_cb)(struct io_uring_cmd *, unsigned)) +{ + __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); +} + #endif /* _LINUX_IO_URING_CMD_H */ -- cgit v1.2.3 From 055c15626a45b1ebc9f2f34981e705e1af171236 Mon Sep 17 00:00:00 2001 From: Pavel Begunkov Date: Fri, 1 Dec 2023 00:57:37 +0000 Subject: io_uring/cmd: inline io_uring_cmd_get_task With io_uring_types.h we see all required definitions to inline io_uring_cmd_get_task(). Signed-off-by: Pavel Begunkov Reviewed-by: Ming Lei Link: https://lore.kernel.org/r/aa8e317f09e651a5f3e72f8c0ad3902084c1f930.1701391955.git.asml.silence@gmail.com Signed-off-by: Jens Axboe --- include/linux/io_uring/cmd.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include/linux/io_uring') diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h index ee9b3bc3a4af..d69b4038aa3e 100644 --- a/include/linux/io_uring/cmd.h +++ b/include/linux/io_uring/cmd.h @@ -39,7 +39,6 @@ void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd, void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, unsigned int issue_flags); -struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd); #else static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, @@ -60,10 +59,6 @@ static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd, unsigned int issue_flags) { } -static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd) -{ - return NULL; -} #endif /* users must follow the IOU_F_TWQ_LAZY_WAKE semantics */ @@ -79,4 +74,9 @@ static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, __io_uring_cmd_do_in_task(ioucmd, task_work_cb, 0); } +static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd) +{ + return cmd_to_io_kiocb(cmd)->task; +} + #endif /* _LINUX_IO_URING_CMD_H */ -- cgit v1.2.3