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Diffstat (limited to 'include/linux/io_uring/cmd.h')
-rw-r--r--include/linux/io_uring/cmd.h55
1 files changed, 52 insertions, 3 deletions
diff --git a/include/linux/io_uring/cmd.h b/include/linux/io_uring/cmd.h
index e453a997c060..abd0c8bd950b 100644
--- a/include/linux/io_uring/cmd.h
+++ b/include/linux/io_uring/cmd.h
@@ -18,23 +18,53 @@ struct io_uring_cmd {
u8 pdu[32]; /* available inline for free use */
};
+struct io_uring_cmd_data {
+ void *op_data;
+ struct io_uring_sqe sqes[2];
+};
+
static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe)
{
return sqe->cmd;
}
+static inline void io_uring_cmd_private_sz_check(size_t cmd_sz)
+{
+ BUILD_BUG_ON(cmd_sz > sizeof_field(struct io_uring_cmd, pdu));
+}
+#define io_uring_cmd_to_pdu(cmd, pdu_type) ( \
+ io_uring_cmd_private_sz_check(sizeof(pdu_type)), \
+ ((pdu_type *)&(cmd)->pdu) \
+)
+
#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,
+
+/*
+ * Completes the request, i.e. posts an io_uring CQE and deallocates @ioucmd
+ * and the corresponding io_uring request.
+ *
+ * Note: the caller should never hard code @issue_flags and is only allowed
+ * to pass the mask provided by the core io_uring code.
+ */
+void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret, u64 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);
+/*
+ * Note: the caller should never hard code @issue_flags and only use the
+ * mask provided by the core io_uring code.
+ */
void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
unsigned int issue_flags);
+/* Execute the request from a blocking context */
+void io_uring_cmd_issue_blocking(struct io_uring_cmd *ioucmd);
+
#else
static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct iov_iter *iter, void *ioucmd)
@@ -42,7 +72,7 @@ static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
return -EOPNOTSUPP;
}
static inline void io_uring_cmd_done(struct io_uring_cmd *cmd, ssize_t ret,
- ssize_t ret2, unsigned issue_flags)
+ u64 ret2, unsigned issue_flags)
{
}
static inline void __io_uring_cmd_do_in_task(struct io_uring_cmd *ioucmd,
@@ -54,8 +84,22 @@ static inline void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
unsigned int issue_flags)
{
}
+static inline void io_uring_cmd_issue_blocking(struct io_uring_cmd *ioucmd)
+{
+}
#endif
+/*
+ * Polled completions must ensure they are coming from a poll queue, and
+ * hence are completed inside the usual poll handling loops.
+ */
+static inline void io_uring_cmd_iopoll_done(struct io_uring_cmd *ioucmd,
+ ssize_t ret, ssize_t res2)
+{
+ lockdep_assert(in_task());
+ io_uring_cmd_done(ioucmd, ret, res2, 0);
+}
+
/* 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))
@@ -71,7 +115,12 @@ static inline void io_uring_cmd_complete_in_task(struct io_uring_cmd *ioucmd,
static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd)
{
- return cmd_to_io_kiocb(cmd)->task;
+ return cmd_to_io_kiocb(cmd)->tctx->task;
+}
+
+static inline struct io_uring_cmd_data *io_uring_cmd_get_async_data(struct io_uring_cmd *cmd)
+{
+ return cmd_to_io_kiocb(cmd)->async_data;
}
#endif /* _LINUX_IO_URING_CMD_H */