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charset="utf-8" CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20220906063723epcas5p23946fd33031aee591210af1c3cd2d574 References: <20220906062721.62630-1-joshi.k@samsung.com> Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Anuj Gupta This is a new helper that callers can use to obtain a bvec iterator for the previously mapped buffer. This is preparatory work to enable fixed-buffer support for io_uring_cmd. Signed-off-by: Anuj Gupta Signed-off-by: Kanchan Joshi --- include/linux/io_uring.h | 8 ++++++++ io_uring/uring_cmd.c | 10 ++++++++++ 2 files changed, 18 insertions(+) diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h index 58676c0a398f..202d90bc2c88 100644 --- a/include/linux/io_uring.h +++ b/include/linux/io_uring.h @@ -4,6 +4,7 @@ #include #include +#include enum io_uring_cmd_flags { IO_URING_F_COMPLETE_DEFER = 1, @@ -32,6 +33,8 @@ struct io_uring_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); void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd, void (*task_work_cb)(struct io_uring_cmd *)); @@ -59,6 +62,11 @@ static inline void io_uring_free(struct task_struct *tsk) __io_uring_free(tsk); } #else +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) { diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c index 6f99dbd5d550..b8f4dc84c403 100644 --- a/io_uring/uring_cmd.c +++ b/io_uring/uring_cmd.c @@ -7,6 +7,7 @@ #include #include "io_uring.h" +#include "rsrc.h" #include "uring_cmd.h" static void io_uring_cmd_work(struct io_kiocb *req, bool *locked) @@ -124,3 +125,12 @@ int io_uring_cmd(struct io_kiocb *req, unsigned int issue_flags) return IOU_ISSUE_SKIP_COMPLETE; } + +int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw, + struct iov_iter *iter, void *ioucmd) +{ + struct io_kiocb *req = cmd_to_io_kiocb(ioucmd); + + return io_import_fixed(rw, iter, req->imu, ubuf, len); +} +EXPORT_SYMBOL_GPL(io_uring_cmd_import_fixed); -- 2.25.1