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-rw-r--r--fs/eventfd.c37
-rw-r--r--fs/eventpoll.c18
-rw-r--r--include/linux/eventfd.h7
-rw-r--r--include/linux/io_uring_types.h2
-rw-r--r--include/uapi/linux/eventpoll.h6
-rw-r--r--include/uapi/linux/io_uring.h18
-rw-r--r--io_uring/io_uring.c223
-rw-r--r--io_uring/io_uring.h43
-rw-r--r--io_uring/kbuf.c14
-rw-r--r--io_uring/msg_ring.c4
-rw-r--r--io_uring/net.c56
-rw-r--r--io_uring/notif.c57
-rw-r--r--io_uring/notif.h15
-rw-r--r--io_uring/poll.c33
-rw-r--r--io_uring/rsrc.c11
-rw-r--r--io_uring/rw.c6
-rw-r--r--io_uring/timeout.c10
-rw-r--r--io_uring/uring_cmd.c2
18 files changed, 355 insertions, 207 deletions
diff --git a/fs/eventfd.c b/fs/eventfd.c
index c0ffee99ad23..249ca6c0b784 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -43,21 +43,7 @@ struct eventfd_ctx {
int id;
};
-/**
- * eventfd_signal - Adds @n to the eventfd counter.
- * @ctx: [in] Pointer to the eventfd context.
- * @n: [in] Value of the counter to be added to the eventfd internal counter.
- * The value cannot be negative.
- *
- * This function is supposed to be called by the kernel in paths that do not
- * allow sleeping. In this function we allow the counter to reach the ULLONG_MAX
- * value, and we signal this as overflow condition by returning a EPOLLERR
- * to poll(2).
- *
- * Returns the amount by which the counter was incremented. This will be less
- * than @n if the counter has overflowed.
- */
-__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
+__u64 eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n, unsigned mask)
{
unsigned long flags;
@@ -78,12 +64,31 @@ __u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
n = ULLONG_MAX - ctx->count;
ctx->count += n;
if (waitqueue_active(&ctx->wqh))
- wake_up_locked_poll(&ctx->wqh, EPOLLIN);
+ wake_up_locked_poll(&ctx->wqh, EPOLLIN | mask);
current->in_eventfd = 0;
spin_unlock_irqrestore(&ctx->wqh.lock, flags);
return n;
}
+
+/**
+ * eventfd_signal - Adds @n to the eventfd counter.
+ * @ctx: [in] Pointer to the eventfd context.
+ * @n: [in] Value of the counter to be added to the eventfd internal counter.
+ * The value cannot be negative.
+ *
+ * This function is supposed to be called by the kernel in paths that do not
+ * allow sleeping. In this function we allow the counter to reach the ULLONG_MAX
+ * value, and we signal this as overflow condition by returning a EPOLLERR
+ * to poll(2).
+ *
+ * Returns the amount by which the counter was incremented. This will be less
+ * than @n if the counter has overflowed.
+ */
+__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
+{
+ return eventfd_signal_mask(ctx, n, 0);
+}
EXPORT_SYMBOL_GPL(eventfd_signal);
static void eventfd_free_ctx(struct eventfd_ctx *ctx)
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 52954d4637b5..64659b110973 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -491,7 +491,8 @@ static inline void ep_set_busy_poll_napi_id(struct epitem *epi)
*/
#ifdef CONFIG_DEBUG_LOCK_ALLOC
-static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi)
+static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
+ unsigned pollflags)
{
struct eventpoll *ep_src;
unsigned long flags;
@@ -522,16 +523,17 @@ static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi)
}
spin_lock_irqsave_nested(&ep->poll_wait.lock, flags, nests);
ep->nests = nests + 1;
- wake_up_locked_poll(&ep->poll_wait, EPOLLIN);
+ wake_up_locked_poll(&ep->poll_wait, EPOLLIN | pollflags);
ep->nests = 0;
spin_unlock_irqrestore(&ep->poll_wait.lock, flags);
}
#else
-static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi)
+static void ep_poll_safewake(struct eventpoll *ep, struct epitem *epi,
+ unsigned pollflags)
{
- wake_up_poll(&ep->poll_wait, EPOLLIN);
+ wake_up_poll(&ep->poll_wait, EPOLLIN | pollflags);
}
#endif
@@ -742,7 +744,7 @@ static void ep_free(struct eventpoll *ep)
/* We need to release all tasks waiting for these file */
if (waitqueue_active(&ep->poll_wait))
- ep_poll_safewake(ep, NULL);
+ ep_poll_safewake(ep, NULL, 0);
/*
* We need to lock this because we could be hit by
@@ -1208,7 +1210,7 @@ out_unlock:
/* We have to call this outside the lock */
if (pwake)
- ep_poll_safewake(ep, epi);
+ ep_poll_safewake(ep, epi, pollflags & EPOLL_URING_WAKE);
if (!(epi->event.events & EPOLLEXCLUSIVE))
ewake = 1;
@@ -1553,7 +1555,7 @@ static int ep_insert(struct eventpoll *ep, const struct epoll_event *event,
/* We have to call this outside the lock */
if (pwake)
- ep_poll_safewake(ep, NULL);
+ ep_poll_safewake(ep, NULL, 0);
return 0;
}
@@ -1629,7 +1631,7 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi,
/* We have to call this outside the lock */
if (pwake)
- ep_poll_safewake(ep, NULL);
+ ep_poll_safewake(ep, NULL, 0);
return 0;
}
diff --git a/include/linux/eventfd.h b/include/linux/eventfd.h
index 3cd202d3eefb..36a486505b08 100644
--- a/include/linux/eventfd.h
+++ b/include/linux/eventfd.h
@@ -40,6 +40,7 @@ struct file *eventfd_fget(int fd);
struct eventfd_ctx *eventfd_ctx_fdget(int fd);
struct eventfd_ctx *eventfd_ctx_fileget(struct file *file);
__u64 eventfd_signal(struct eventfd_ctx *ctx, __u64 n);
+__u64 eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n, unsigned mask);
int eventfd_ctx_remove_wait_queue(struct eventfd_ctx *ctx, wait_queue_entry_t *wait,
__u64 *cnt);
void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt);
@@ -66,6 +67,12 @@ static inline int eventfd_signal(struct eventfd_ctx *ctx, __u64 n)
return -ENOSYS;
}
+static inline int eventfd_signal_mask(struct eventfd_ctx *ctx, __u64 n,
+ unsigned mask)
+{
+ return -ENOSYS;
+}
+
static inline void eventfd_ctx_put(struct eventfd_ctx *ctx)
{
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h
index f5b687a787a3..accdfecee953 100644
--- a/include/linux/io_uring_types.h
+++ b/include/linux/io_uring_types.h
@@ -174,7 +174,9 @@ struct io_submit_state {
bool plug_started;
bool need_plug;
unsigned short submit_nr;
+ unsigned int cqes_count;
struct blk_plug plug;
+ struct io_uring_cqe cqes[16];
};
struct io_ev_fd {
diff --git a/include/uapi/linux/eventpoll.h b/include/uapi/linux/eventpoll.h
index 8a3432d0f0dc..e687658843b1 100644
--- a/include/uapi/linux/eventpoll.h
+++ b/include/uapi/linux/eventpoll.h
@@ -41,6 +41,12 @@
#define EPOLLMSG (__force __poll_t)0x00000400
#define EPOLLRDHUP (__force __poll_t)0x00002000
+/*
+ * Internal flag - wakeup generated by io_uring, used to detect recursion back
+ * into the io_uring poll handler.
+ */
+#define EPOLL_URING_WAKE ((__force __poll_t)(1U << 27))
+
/* Set exclusive wakeup mode for the target file descriptor */
#define EPOLLEXCLUSIVE ((__force __poll_t)(1U << 28))
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h
index 2df3225b562f..9d4c4078e8d0 100644
--- a/include/uapi/linux/io_uring.h
+++ b/include/uapi/linux/io_uring.h
@@ -296,10 +296,28 @@ enum io_uring_op {
*
* IORING_RECVSEND_FIXED_BUF Use registered buffers, the index is stored in
* the buf_index field.
+ *
+ * IORING_SEND_ZC_REPORT_USAGE
+ * If set, SEND[MSG]_ZC should report
+ * the zerocopy usage in cqe.res
+ * for the IORING_CQE_F_NOTIF cqe.
+ * 0 is reported if zerocopy was actually possible.
+ * IORING_NOTIF_USAGE_ZC_COPIED if data was copied
+ * (at least partially).
*/
#define IORING_RECVSEND_POLL_FIRST (1U << 0)
#define IORING_RECV_MULTISHOT (1U << 1)
#define IORING_RECVSEND_FIXED_BUF (1U << 2)
+#define IORING_SEND_ZC_REPORT_USAGE (1U << 3)
+
+/*
+ * cqe.res for IORING_CQE_F_NOTIF if
+ * IORING_SEND_ZC_REPORT_USAGE was requested
+ *
+ * It should be treated as a flag, all other
+ * bits of cqe.res should be treated as reserved!
+ */
+#define IORING_NOTIF_USAGE_ZC_COPIED (1U << 31)
/*
* accept flags stored in sqe->ioprio
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 61cd7ffd0f6a..3436e0b83534 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -167,7 +167,8 @@ EXPORT_SYMBOL(io_uring_get_socket);
static inline void io_submit_flush_completions(struct io_ring_ctx *ctx)
{
- if (!wq_list_empty(&ctx->submit_state.compl_reqs))
+ if (!wq_list_empty(&ctx->submit_state.compl_reqs) ||
+ ctx->submit_state.cqes_count)
__io_submit_flush_completions(ctx);
}
@@ -495,7 +496,7 @@ static void io_eventfd_ops(struct rcu_head *rcu)
int ops = atomic_xchg(&ev_fd->ops, 0);
if (ops & BIT(IO_EVENTFD_OP_SIGNAL_BIT))
- eventfd_signal(ev_fd->cq_ev_fd, 1);
+ eventfd_signal_mask(ev_fd->cq_ev_fd, 1, EPOLL_URING_WAKE);
/* IO_EVENTFD_OP_FREE_BIT may not be set here depending on callback
* ordering in a race but if references are 0 we know we have to free
@@ -531,7 +532,7 @@ static void io_eventfd_signal(struct io_ring_ctx *ctx)
goto out;
if (likely(eventfd_signal_allowed())) {
- eventfd_signal(ev_fd->cq_ev_fd, 1);
+ eventfd_signal_mask(ev_fd->cq_ev_fd, 1, EPOLL_URING_WAKE);
} else {
atomic_inc(&ev_fd->refs);
if (!atomic_fetch_or(BIT(IO_EVENTFD_OP_SIGNAL_BIT), &ev_fd->ops))
@@ -581,23 +582,21 @@ void __io_commit_cqring_flush(struct io_ring_ctx *ctx)
io_eventfd_flush_signal(ctx);
}
-static inline void io_cqring_ev_posted(struct io_ring_ctx *ctx)
-{
- io_commit_cqring_flush(ctx);
- io_cqring_wake(ctx);
-}
-
-static inline void __io_cq_unlock_post(struct io_ring_ctx *ctx)
+/* keep it inlined for io_submit_flush_completions() */
+static inline void io_cq_unlock_post_inline(struct io_ring_ctx *ctx)
__releases(ctx->completion_lock)
{
io_commit_cqring(ctx);
spin_unlock(&ctx->completion_lock);
- io_cqring_ev_posted(ctx);
+
+ io_commit_cqring_flush(ctx);
+ io_cqring_wake(ctx);
}
void io_cq_unlock_post(struct io_ring_ctx *ctx)
+ __releases(ctx->completion_lock)
{
- __io_cq_unlock_post(ctx);
+ io_cq_unlock_post_inline(ctx);
}
/* Returns true if there are no backlogged entries after the flush */
@@ -778,11 +777,13 @@ struct io_uring_cqe *__io_get_cqe(struct io_ring_ctx *ctx, bool overflow)
return &rings->cqes[off];
}
-bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags,
- bool allow_overflow)
+static bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags,
+ bool allow_overflow)
{
struct io_uring_cqe *cqe;
+ lockdep_assert_held(&ctx->completion_lock);
+
ctx->cq_extra++;
/*
@@ -811,9 +812,23 @@ bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags
return false;
}
-bool io_post_aux_cqe(struct io_ring_ctx *ctx,
- u64 user_data, s32 res, u32 cflags,
- bool allow_overflow)
+static void __io_flush_post_cqes(struct io_ring_ctx *ctx)
+ __must_hold(&ctx->uring_lock)
+{
+ struct io_submit_state *state = &ctx->submit_state;
+ unsigned int i;
+
+ lockdep_assert_held(&ctx->uring_lock);
+ for (i = 0; i < state->cqes_count; i++) {
+ struct io_uring_cqe *cqe = &state->cqes[i];
+
+ io_fill_cqe_aux(ctx, cqe->user_data, cqe->res, cqe->flags, true);
+ }
+ state->cqes_count = 0;
+}
+
+static bool __io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags,
+ bool allow_overflow)
{
bool filled;
@@ -823,15 +838,58 @@ bool io_post_aux_cqe(struct io_ring_ctx *ctx,
return filled;
}
-static void __io_req_complete_put(struct io_kiocb *req)
+bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags)
+{
+ return __io_post_aux_cqe(ctx, user_data, res, cflags, true);
+}
+
+bool io_aux_cqe(struct io_ring_ctx *ctx, bool defer, u64 user_data, s32 res, u32 cflags,
+ bool allow_overflow)
{
+ struct io_uring_cqe *cqe;
+ unsigned int length;
+
+ if (!defer)
+ return __io_post_aux_cqe(ctx, user_data, res, cflags, allow_overflow);
+
+ length = ARRAY_SIZE(ctx->submit_state.cqes);
+
+ lockdep_assert_held(&ctx->uring_lock);
+
+ if (ctx->submit_state.cqes_count == length) {
+ io_cq_lock(ctx);
+ __io_flush_post_cqes(ctx);
+ /* no need to flush - flush is deferred */
+ spin_unlock(&ctx->completion_lock);
+ }
+
+ /* For defered completions this is not as strict as it is otherwise,
+ * however it's main job is to prevent unbounded posted completions,
+ * and in that it works just as well.
+ */
+ if (!allow_overflow && test_bit(IO_CHECK_CQ_OVERFLOW_BIT, &ctx->check_cq))
+ return false;
+
+ cqe = &ctx->submit_state.cqes[ctx->submit_state.cqes_count++];
+ cqe->user_data = user_data;
+ cqe->res = res;
+ cqe->flags = cflags;
+ return true;
+}
+
+static void __io_req_complete_post(struct io_kiocb *req)
+{
+ struct io_ring_ctx *ctx = req->ctx;
+
+ io_cq_lock(ctx);
+ if (!(req->flags & REQ_F_CQE_SKIP))
+ __io_fill_cqe_req(ctx, req);
+
/*
* If we're the last reference to this request, add to our locked
* free_list cache.
*/
if (req_ref_put_and_test(req)) {
- struct io_ring_ctx *ctx = req->ctx;
-
if (req->flags & IO_REQ_LINK_FLAGS) {
if (req->flags & IO_DISARM_MASK)
io_disarm_next(req);
@@ -852,38 +910,35 @@ static void __io_req_complete_put(struct io_kiocb *req)
wq_list_add_head(&req->comp_list, &ctx->locked_free_list);
ctx->locked_free_nr++;
}
-}
-
-void __io_req_complete_post(struct io_kiocb *req)
-{
- if (!(req->flags & REQ_F_CQE_SKIP))
- __io_fill_cqe_req(req->ctx, req);
- __io_req_complete_put(req);
-}
-
-void io_req_complete_post(struct io_kiocb *req)
-{
- struct io_ring_ctx *ctx = req->ctx;
-
- io_cq_lock(ctx);
- __io_req_complete_post(req);
io_cq_unlock_post(ctx);
}
-inline void __io_req_complete(struct io_kiocb *req, unsigned issue_flags)
+void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags)
{
- io_req_complete_post(req);
+ if (!(issue_flags & IO_URING_F_UNLOCKED) ||
+ !(req->ctx->flags & IORING_SETUP_IOPOLL)) {
+ __io_req_complete_post(req);
+ } else {
+ struct io_ring_ctx *ctx = req->ctx;
+
+ mutex_lock(&ctx->uring_lock);
+ __io_req_complete_post(req);
+ mutex_unlock(&ctx->uring_lock);
+ }
}
-void io_req_complete_failed(struct io_kiocb *req, s32 res)
+void io_req_defer_failed(struct io_kiocb *req, s32 res)
+ __must_hold(&ctx->uring_lock)
{
const struct io_op_def *def = &io_op_defs[req->opcode];
+ lockdep_assert_held(&req->ctx->uring_lock);
+
req_set_fail(req);
io_req_set_res(req, res, io_put_kbuf(req, IO_URING_F_UNLOCKED));
if (def->fail)
def->fail(req);
- io_req_complete_post(req);
+ io_req_complete_defer(req);
}
/*
@@ -1105,6 +1160,20 @@ void tctx_task_work(struct callback_head *cb)
trace_io_uring_task_work_run(tctx, count, loops);
}
+static __cold void io_fallback_tw(struct io_uring_task *tctx)
+{
+ struct llist_node *node = llist_del_all(&tctx->task_list);
+ struct io_kiocb *req;
+
+ while (node) {
+ req = container_of(node, struct io_kiocb, io_task_work.node);
+ node = node->next;
+ if (llist_add(&req->io_task_work.node,
+ &req->ctx->fallback_llist))
+ schedule_delayed_work(&req->ctx->fallback_work, 1);
+ }
+}
+
static void io_req_local_work_add(struct io_kiocb *req)
{
struct io_ring_ctx *ctx = req->ctx;
@@ -1127,11 +1196,10 @@ static void io_req_local_work_add(struct io_kiocb *req)
__io_cqring_wake(ctx);
}
-static inline void __io_req_task_work_add(struct io_kiocb *req, bool allow_local)
+void __io_req_task_work_add(struct io_kiocb *req, bool allow_local)
{
struct io_uring_task *tctx = req->task->io_uring;
struct io_ring_ctx *ctx = req->ctx;
- struct llist_node *node;
if (allow_local && ctx->flags & IORING_SETUP_DEFER_TASKRUN) {
io_req_local_work_add(req);
@@ -1148,20 +1216,7 @@ static inline void __io_req_task_work_add(struct io_kiocb *req, bool allow_local
if (likely(!task_work_add(req->task, &tctx->task_work, ctx->notify_method)))
return;
- node = llist_del_all(&tctx->task_list);
-
- while (node) {
- req = container_of(node, struct io_kiocb, io_task_work.node);
- node = node->next;
- if (llist_add(&req->io_task_work.node,
- &req->ctx->fallback_llist))
- schedule_delayed_work(&req->ctx->fallback_work, 1);
- }
-}
-
-void io_req_task_work_add(struct io_kiocb *req)
-{
- __io_req_task_work_add(req, true);
+ io_fallback_tw(tctx);
}
static void __cold io_move_task_work_from_local(struct io_ring_ctx *ctx)
@@ -1237,23 +1292,10 @@ int io_run_local_work(struct io_ring_ctx *ctx)
return ret;
}
-static void io_req_tw_post(struct io_kiocb *req, bool *locked)
-{
- io_req_complete_post(req);
-}
-
-void io_req_tw_post_queue(struct io_kiocb *req, s32 res, u32 cflags)
-{
- io_req_set_res(req, res, cflags);
- req->io_task_work.func = io_req_tw_post;
- io_req_task_work_add(req);
-}
-
static void io_req_task_cancel(struct io_kiocb *req, bool *locked)
{
- /* not needed for normal modes, but SQPOLL depends on it */
io_tw_lock(req->ctx, locked);
- io_req_complete_failed(req, req->cqe.res);
+ io_req_defer_failed(req, req->cqe.res);
}
void io_req_task_submit(struct io_kiocb *req, bool *locked)
@@ -1263,7 +1305,7 @@ void io_req_task_submit(struct io_kiocb *req, bool *locked)
if (likely(!(req->task->flags & PF_EXITING)))
io_queue_sqe(req);
else
- io_req_complete_failed(req, -EFAULT);
+ io_req_defer_failed(req, -EFAULT);
}
void io_req_task_queue_fail(struct io_kiocb *req, int ret)
@@ -1344,6 +1386,9 @@ static void __io_submit_flush_completions(struct io_ring_ctx *ctx)
struct io_submit_state *state = &ctx->submit_state;
io_cq_lock(ctx);
+ /* must come first to preserve CQE ordering in failure cases */
+ if (state->cqes_count)
+ __io_flush_post_cqes(ctx);
wq_list_for_each(node, prev, &state->compl_reqs) {
struct io_kiocb *req = container_of(node, struct io_kiocb,
comp_list);
@@ -1351,10 +1396,12 @@ static void __io_submit_flush_completions(struct io_ring_ctx *ctx)
if (!(req->flags & REQ_F_CQE_SKIP))
__io_fill_cqe_req(ctx, req);
}
- __io_cq_unlock_post(ctx);
+ io_cq_unlock_post_inline(ctx);
- io_free_batch_list(ctx, state->compl_reqs.first);
- INIT_WQ_LIST(&state->compl_reqs);
+ if (!wq_list_empty(&ctx->submit_state.compl_reqs)) {
+ io_free_batch_list(ctx, state->compl_reqs.first);
+ INIT_WQ_LIST(&state->compl_reqs);
+ }
}
/*
@@ -1476,16 +1523,10 @@ static int io_iopoll_check(struct io_ring_ctx *ctx, long min)
void io_req_task_complete(struct io_kiocb *req, bool *locked)
{
- if (req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING)) {
- unsigned issue_flags = *locked ? 0 : IO_URING_F_UNLOCKED;
-
- req->cqe.flags |= io_put_kbuf(req, issue_flags);
- }
-
if (*locked)
io_req_complete_defer(req);
else
- io_req_complete_post(req);
+ io_req_complete_post(req, IO_URING_F_UNLOCKED);
}
/*
@@ -1635,6 +1676,7 @@ static u32 io_get_sequence(struct io_kiocb *req)
}
static __cold void io_drain_req(struct io_kiocb *req)
+ __must_hold(&ctx->uring_lock)
{
struct io_ring_ctx *ctx = req->ctx;
struct io_defer_entry *de;
@@ -1655,7 +1697,7 @@ queue:
ret = io_req_prep_async(req);
if (ret) {
fail:
- io_req_complete_failed(req, ret);
+ io_req_defer_failed(req, ret);
return;
}
io_prep_async_link(req);
@@ -1752,7 +1794,7 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags)
if (issue_flags & IO_URING_F_COMPLETE_DEFER)
io_req_complete_defer(req);
else
- io_req_complete_post(req);
+ io_req_complete_post(req, issue_flags);
} else if (ret != IOU_ISSUE_SKIP_COMPLETE)
return ret;
@@ -1768,7 +1810,8 @@ int io_poll_issue(struct io_kiocb *req, bool *locked)
io_tw_lock(req->ctx, locked);
if (unlikely(req->task->flags & PF_EXITING))
return -EFAULT;
- return io_issue_sqe(req, IO_URING_F_NONBLOCK|IO_URING_F_MULTISHOT);
+ return io_issue_sqe(req, IO_URING_F_NONBLOCK|IO_URING_F_MULTISHOT|
+ IO_URING_F_COMPLETE_DEFER);
}
struct io_wq_work *io_wq_free_work(struct io_wq_work *work)
@@ -1787,7 +1830,7 @@ void io_wq_submit_work(struct io_wq_work *work)
bool needs_poll = false;
int ret = 0, err = -ECANCELED;
- /* one will be dropped by ->io_free_work() after returning to io-wq */
+ /* one will be dropped by ->io_wq_free_work() after returning to io-wq */
if (!(req->flags & REQ_F_REFCOUNT))
__io_req_set_refcount(req, 2);
else
@@ -1885,7 +1928,7 @@ static void io_queue_async(struct io_kiocb *req, int ret)
struct io_kiocb *linked_timeout;
if (ret != -EAGAIN || (req->flags & REQ_F_NOWAIT)) {
- io_req_complete_failed(req, ret);
+ io_req_defer_failed(req, ret);
return;
}
@@ -1935,14 +1978,14 @@ static void io_queue_sqe_fallback(struct io_kiocb *req)
*/
req->flags &= ~REQ_F_HARDLINK;
req->flags |= REQ_F_LINK;
- io_req_complete_failed(req, req->cqe.res);
+ io_req_defer_failed(req, req->cqe.res);
} else if (unlikely(req->ctx->drain_active)) {
io_drain_req(req);
} else {
int ret = io_req_prep_async(req);
if (unlikely(ret))
- io_req_complete_failed(req, ret);
+ io_req_defer_failed(req, ret);
else
io_queue_iowq(req, NULL);
}
@@ -2670,7 +2713,7 @@ static __poll_t io_uring_poll(struct file *file, poll_table *wait)
* lock(&ep->mtx);
*
* Users may get EPOLLIN meanwhile seeing nothing in cqring, this
- * pushs them to do the flush.
+ * pushes them to do the flush.
*/
if (io_cqring_events(ctx) || io_has_work(ctx))
@@ -2871,7 +2914,7 @@ static __cold bool io_cancel_defer_files(struct io_ring_ctx *ctx,
while (!list_empty(&list)) {
de = list_first_entry(&list, struct io_defer_entry, list);
list_del_init(&de->list);
- io_req_complete_failed(de->req, -ECANCELED);
+ io_req_task_queue_fail(de->req, -ECANCELED);
kfree(de);
}
return true;
@@ -4064,8 +4107,6 @@ SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode,
ctx = f.file->private_data;
- io_run_task_work_ctx(ctx);
-
mutex_lock(&ctx->uring_lock);
ret = __io_uring_register(ctx, opcode, arg, nr_args);
mutex_unlock(&ctx->uring_lock);
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index 50bc3af44953..062899b1fe86 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -4,6 +4,7 @@
#include <linux/errno.h>
#include <linux/lockdep.h>
#include <linux/io_uring_types.h>
+#include <uapi/linux/eventpoll.h>
#include "io-wq.h"
#include "slist.h"
#include "filetable.h"
@@ -29,14 +30,11 @@ bool io_req_cqe_overflow(struct io_kiocb *req);
int io_run_task_work_sig(struct io_ring_ctx *ctx);
int __io_run_local_work(struct io_ring_ctx *ctx, bool *locked);
int io_run_local_work(struct io_ring_ctx *ctx);
-void io_req_complete_failed(struct io_kiocb *req, s32 res);
-void __io_req_complete(struct io_kiocb *req, unsigned issue_flags);
-void io_req_complete_post(struct io_kiocb *req);
-void __io_req_complete_post(struct io_kiocb *req);
-bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags,
- bool allow_overflow);
-bool io_fill_cqe_aux(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags,
- bool allow_overflow);
+void io_req_defer_failed(struct io_kiocb *req, s32 res);
+void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags);
+bool io_post_aux_cqe(struct io_ring_ctx *ctx, u64 user_data, s32 res, u32 cflags);
+bool io_aux_cqe(struct io_ring_ctx *ctx, bool defer, u64 user_data, s32 res, u32 cflags,
+ bool allow_overflow);
void __io_commit_cqring_flush(struct io_ring_ctx *ctx);
struct page **io_pin_pages(unsigned long ubuf, unsigned long len, int *npages);
@@ -50,10 +48,9 @@ static inline bool io_req_ffs_set(struct io_kiocb *req)
return req->flags & REQ_F_FIXED_FILE;
}
+void __io_req_task_work_add(struct io_kiocb *req, bool allow_local);
bool io_is_uring_fops(struct file *file);
bool io_alloc_async_data(struct io_kiocb *req);
-void io_req_task_work_add(struct io_kiocb *req);
-void io_req_tw_post_queue(struct io_kiocb *req, s32 res, u32 cflags);
void io_req_task_queue(struct io_kiocb *req);
void io_queue_iowq(struct io_kiocb *req, bool *dont_use);
void io_req_task_complete(struct io_kiocb *req, bool *locked);
@@ -82,6 +79,11 @@ bool __io_alloc_req_refill(struct io_ring_ctx *ctx);
bool io_match_task_safe(struct io_kiocb *head, struct task_struct *task,
bool cancel_all);
+static inline void io_req_task_work_add(struct io_kiocb *req)
+{
+ __io_req_task_work_add(req, true);
+}
+
#define io_for_each_link(pos, head) \
for (pos = (head); pos; pos = pos->link)
@@ -207,12 +209,18 @@ static inline void io_commit_cqring(struct io_ring_ctx *ctx)
static inline void __io_cqring_wake(struct io_ring_ctx *ctx)
{
/*
- * wake_up_all() may seem excessive, but io_wake_function() and
- * io_should_wake() handle the termination of the loop and only
- * wake as many waiters as we need to.
+ * Trigger waitqueue handler on all waiters on our waitqueue. This
+ * won't necessarily wake up all the tasks, io_should_wake() will make
+ * that decision.
+ *
+ * Pass in EPOLLIN|EPOLL_URING_WAKE as the poll wakeup key. The latter
+ * set in the mask so that if we recurse back into our own poll
+ * waitqueue handlers, we know we have a dependency between eventfd or
+ * epoll and should terminate multishot poll at that point.
*/
if (waitqueue_active(&ctx->cq_wait))
- wake_up_all(&ctx->cq_wait);
+ __wake_up(&ctx->cq_wait, TASK_NORMAL, 0,
+ poll_to_key(EPOLL_URING_WAKE | EPOLLIN));
}
static inline void io_cqring_wake(struct io_ring_ctx *ctx)
@@ -369,4 +377,11 @@ static inline bool io_allowed_run_tw(struct io_ring_ctx *ctx)
ctx->submitter_task == current);
}
+static inline void io_req_queue_tw_complete(struct io_kiocb *req, s32 res)
+{
+ io_req_set_res(req, res, 0);
+ req->io_task_work.func = io_req_task_complete;
+ io_req_task_work_add(req);
+}
+
#endif
diff --git a/io_uring/kbuf.c b/io_uring/kbuf.c
index e2c46889d5fa..4a6401080c1f 100644
--- a/io_uring/kbuf.c
+++ b/io_uring/kbuf.c
@@ -306,14 +306,11 @@ int io_remove_buffers(struct io_kiocb *req, unsigned int issue_flags)
if (!bl->buf_nr_pages)
ret = __io_remove_buffers(ctx, bl, p->nbufs);
}
+ io_ring_submit_unlock(ctx, issue_flags);
if (ret < 0)
req_set_fail(req);
-
- /* complete before unlock, IOPOLL may need the lock */
io_req_set_res(req, ret, 0);
- __io_req_complete(req, issue_flags);
- io_ring_submit_unlock(ctx, issue_flags);
- return IOU_ISSUE_SKIP_COMPLETE;
+ return IOU_OK;
}
int io_provide_buffers_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
@@ -458,13 +455,12 @@ int io_provide_buffers(struct io_kiocb *req, unsigned int issue_flags)
ret = io_add_buffers(ctx, p, bl);
err:
+ io_ring_submit_unlock(ctx, issue_flags);
+
if (ret < 0)
req_set_fail(req);
- /* complete before unlock, IOPOLL may need the lock */
io_req_set_res(req, ret, 0);
- __io_req_complete(req, issue_flags);
- io_ring_submit_unlock(ctx, issue_flags);
- return IOU_ISSUE_SKIP_COMPLETE;
+ return IOU_OK;
}
int io_register_pbuf_ring(struct io_ring_ctx *ctx, void __user *arg)
diff --git a/io_uring/msg_ring.c b/io_uring/msg_ring.c
index 90d2fc6fd80e..afb543aab9f6 100644
--- a/io_uring/msg_ring.c
+++ b/io_uring/msg_ring.c
@@ -31,7 +31,7 @@ static int io_msg_ring_data(struct io_kiocb *req)
if (msg->src_fd || msg->dst_fd || msg->flags)
return -EINVAL;
- if (io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0, true))
+ if (io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0))
return 0;
return -EOVERFLOW;
@@ -116,7 +116,7 @@ static int io_msg_send_fd(struct io_kiocb *req, unsigned int issue_flags)
* completes with -EOVERFLOW, then the sender must ensure that a
* later IORING_OP_MSG_RING delivers the message.
*/
- if (!io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0, true))
+ if (!io_post_aux_cqe(target_ctx, msg->user_data, msg->len, 0))
ret = -EOVERFLOW;
out_unlock:
io_double_unlock_ctx(ctx, target_ctx, issue_flags);
diff --git a/io_uring/net.c b/io_uring/net.c
index 2818aeefea42..cb831326ea5b 100644
--- a/io_uring/net.c
+++ b/io_uring/net.c
@@ -125,13 +125,15 @@ static struct io_async_msghdr *io_msg_alloc_async(struct io_kiocb *req,
struct io_cache_entry *entry;
struct io_async_msghdr *hdr;
- if (!(issue_flags & IO_URING_F_UNLOCKED) &&
- (entry = io_alloc_cache_get(&ctx->netmsg_cache)) != NULL) {
- hdr = container_of(entry, struct io_async_msghdr, cache);
- hdr->free_iov = NULL;
- req->flags |= REQ_F_ASYNC_DATA;
- req->async_data = hdr;
- return hdr;
+ if (!(issue_flags & IO_URING_F_UNLOCKED)) {
+ entry = io_alloc_cache_get(&ctx->netmsg_cache);
+ if (entry) {
+ hdr = container_of(entry, struct io_async_msghdr, cache);
+ hdr->free_iov = NULL;
+ req->flags |= REQ_F_ASYNC_DATA;
+ req->async_data = hdr;
+ return hdr;
+ }
}
if (!io_alloc_async_data(req)) {
@@ -599,16 +601,12 @@ static inline bool io_recv_finish(struct io_kiocb *req, int *ret,
}
if (!mshot_finished) {
- if (io_post_aux_cqe(req->ctx, req->cqe.user_data, *ret,
- cflags | IORING_CQE_F_MORE, false)) {
+ if (io_aux_cqe(req->ctx, issue_flags & IO_URING_F_COMPLETE_DEFER,
+ req->cqe.user_data, *ret, cflags | IORING_CQE_F_MORE, true)) {
io_recv_prep_retry(req);
return false;
}
- /*
- * Otherwise stop multishot but use the current result.
- * Probably will end up going into overflow, but this means
- * we cannot trust the ordering anymore
- */
+ /* Otherwise stop multishot but use the current result. */
}
io_req_set_res(req, *ret, cflags);
@@ -923,6 +921,9 @@ void io_send_zc_cleanup(struct io_kiocb *req)
}
}
+#define IO_ZC_FLAGS_COMMON (IORING_RECVSEND_POLL_FIRST | IORING_RECVSEND_FIXED_BUF)
+#define IO_ZC_FLAGS_VALID (IO_ZC_FLAGS_COMMON | IORING_SEND_ZC_REPORT_USAGE)
+
int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_sr_msg *zc = io_kiocb_to_cmd(req, struct io_sr_msg);
@@ -935,10 +936,6 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (req->flags & REQ_F_CQE_SKIP)
return -EINVAL;
- zc->flags = READ_ONCE(sqe->ioprio);
- if (zc->flags & ~(IORING_RECVSEND_POLL_FIRST |
- IORING_RECVSEND_FIXED_BUF))
- return -EINVAL;
notif = zc->notif = io_alloc_notif(ctx);
if (!notif)
return -ENOMEM;
@@ -946,6 +943,17 @@ int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
notif->cqe.res = 0;
notif->cqe.flags = IORING_CQE_F_NOTIF;
req->flags |= REQ_F_NEED_CLEANUP;
+
+ zc->flags = READ_ONCE(sqe->ioprio);
+ if (unlikely(zc->flags & ~IO_ZC_FLAGS_COMMON)) {
+ if (zc->flags & ~IO_ZC_FLAGS_VALID)
+ return -EINVAL;
+ if (zc->flags & IORING_SEND_ZC_REPORT_USAGE) {
+ io_notif_set_extended(notif);
+ io_notif_to_data(notif)->zc_report = true;
+ }
+ }
+
if (zc->flags & IORING_RECVSEND_FIXED_BUF) {
unsigned idx = READ_ONCE(sqe->buf_index);
@@ -1087,6 +1095,7 @@ int io_send_zc(struct io_kiocb *req, unsigned int issue_flags)
return ret;
msg.sg_from_iter = io_sg_from_iter;
} else {
+ io_notif_set_extended(zc->notif);
ret = import_single_range(ITER_SOURCE, zc->buf, zc->len, &iov,
&msg.msg_iter);
if (unlikely(ret))
@@ -1148,6 +1157,8 @@ int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags)
unsigned flags;
int ret, min_ret = 0;
+ io_notif_set_extended(sr->notif);
+
sock = sock_from_file(req->file);
if (unlikely(!sock))
return -ENOTSOCK;
@@ -1307,12 +1318,13 @@ retry:
return IOU_OK;
}
- if (ret >= 0 &&
- io_post_aux_cqe(ctx, req->cqe.user_data, ret, IORING_CQE_F_MORE, false))
+ if (ret < 0)
+ return ret;
+ if (io_aux_cqe(ctx, issue_flags & IO_URING_F_COMPLETE_DEFER,
+ req->cqe.user_data, ret, IORING_CQE_F_MORE, true))
goto retry;
- io_req_set_res(req, ret, 0);
- return (issue_flags & IO_URING_F_MULTISHOT) ? IOU_STOP_MULTISHOT : IOU_OK;
+ return -ECANCELED;
}
int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
diff --git a/io_uring/notif.c b/io_uring/notif.c
index e37c6569d82e..c4bb793ebf0e 100644
--- a/io_uring/notif.c
+++ b/io_uring/notif.c
@@ -9,11 +9,14 @@
#include "notif.h"
#include "rsrc.h"
-static void __io_notif_complete_tw(struct io_kiocb *notif, bool *locked)
+static void io_notif_complete_tw_ext(struct io_kiocb *notif, bool *locked)
{
struct io_notif_data *nd = io_notif_to_data(notif);
struct io_ring_ctx *ctx = notif->ctx;
+ if (nd->zc_report && (nd->zc_copied || !nd->zc_used))
+ notif->cqe.res |= IORING_NOTIF_USAGE_ZC_COPIED;
+
if (nd->account_pages && ctx->user) {
__io_unaccount_mem(ctx->user, nd->account_pages);
nd->account_pages = 0;
@@ -21,16 +24,41 @@ static void __io_notif_complete_tw(struct io_kiocb *notif, bool *locked)
io_req_task_complete(notif, locked);
}
-static void io_uring_tx_zerocopy_callback(struct sk_buff *skb,
- struct ubuf_info *uarg,
- bool success)
+static void io_tx_ubuf_callback(struct sk_buff *skb, struct ubuf_info *uarg,
+ bool success)
{
struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
struct io_kiocb *notif = cmd_to_io_kiocb(nd);
- if (refcount_dec_and_test(&uarg->refcnt)) {
- notif->io_task_work.func = __io_notif_complete_tw;
+ if (refcount_dec_and_test(&uarg->refcnt))
io_req_task_work_add(notif);
+}
+
+static void io_tx_ubuf_callback_ext(struct sk_buff *skb, struct ubuf_info *uarg,
+ bool success)
+{
+ struct io_notif_data *nd = container_of(uarg, struct io_notif_data, uarg);
+
+ if (nd->zc_report) {
+ if (success && !nd->zc_used && skb)
+ WRITE_ONCE(nd->zc_used, true);
+ else if (!success && !nd->zc_copied)
+ WRITE_ONCE(nd->zc_copied, true);
+ }
+ io_tx_ubuf_callback(skb, uarg, success);
+}
+
+void io_notif_set_extended(struct io_kiocb *notif)
+{
+ struct io_notif_data *nd = io_notif_to_data(notif);
+
+ if (nd->uarg.callback != io_tx_ubuf_callback_ext) {
+ nd->account_pages = 0;
+ nd->zc_report = false;
+ nd->zc_used = false;
+ nd->zc_copied = false;
+ nd->uarg.callback = io_tx_ubuf_callback_ext;
+ notif->io_task_work.func = io_notif_complete_tw_ext;
}
}
@@ -49,24 +77,11 @@ struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx)
notif->task = current;
io_get_task_refs(1);
notif->rsrc_node = NULL;
- io_req_set_rsrc_node(notif, ctx, 0);
+ notif->io_task_work.func = io_req_task_complete;
nd = io_notif_to_data(notif);
- nd->account_pages = 0;
nd->uarg.flags = SKBFL_ZEROCOPY_FRAG | SKBFL_DONT_ORPHAN;
- nd->uarg.callback = io_uring_tx_zerocopy_callback;
+ nd->uarg.callback = io_tx_ubuf_callback;
refcount_set(&nd->uarg.refcnt, 1);
return notif;
}
-
-void io_notif_flush(struct io_kiocb *notif)
- __must_hold(&slot->notif->ctx->uring_lock)
-{
- struct io_notif_data *nd = io_notif_to_data(notif);
-
- /* drop slot's master ref */
- if (refcount_dec_and_test(&nd->uarg.refcnt)) {
- notif->io_task_work.func = __io_notif_complete_tw;
- io_req_task_work_add(notif);
- }
-}
diff --git a/io_uring/notif.h b/io_uring/notif.h
index 5b4d710c8ca5..c88c800cd89d 100644
--- a/io_uring/notif.h
+++ b/io_uring/notif.h
@@ -13,16 +13,29 @@ struct io_notif_data {
struct file *file;
struct ubuf_info uarg;
unsigned long account_pages;
+ bool zc_report;
+ bool zc_used;
+ bool zc_copied;
};
-void io_notif_flush(struct io_kiocb *notif);
struct io_kiocb *io_alloc_notif(struct io_ring_ctx *ctx);
+void io_notif_set_extended(struct io_kiocb *notif);
static inline struct io_notif_data *io_notif_to_data(struct io_kiocb *notif)
{
return io_kiocb_to_cmd(notif, struct io_notif_data);
}
+static inline void io_notif_flush(struct io_kiocb *notif)
+ __must_hold(&notif->ctx->uring_lock)
+{
+ struct io_notif_data *nd = io_notif_to_data(notif);
+
+ /* drop slot's master ref */
+ if (refcount_dec_and_test(&nd->uarg.refcnt))
+ io_req_task_work_add(notif);
+}
+
static inline int io_notif_account_mem(struct io_kiocb *notif, unsigned len)
{
struct io_ring_ctx *ctx = notif->ctx;
diff --git a/io_uring/poll.c b/io_uring/poll.c
index d9bf1767867e..599ba28c89b2 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -280,16 +280,14 @@ static int io_poll_check_events(struct io_kiocb *req, bool *locked)
continue;
if (req->apoll_events & EPOLLONESHOT)
return IOU_POLL_DONE;
- if (io_is_uring_fops(req->file))
- return IOU_POLL_DONE;
/* multishot, just fill a CQE and proceed */
if (!(req->flags & REQ_F_APOLL_MULTISHOT)) {
__poll_t mask = mangle_poll(req->cqe.res &
req->apoll_events);
- if (!io_post_aux_cqe(ctx, req->cqe.user_data,
- mask, IORING_CQE_F_MORE, false)) {
+ if (!io_aux_cqe(ctx, *locked, req->cqe.user_data,
+ mask, IORING_CQE_F_MORE, false)) {
io_req_set_res(req, mask, 0);
return IOU_POLL_REMOVE_POLL_USE_RES;
}
@@ -345,26 +343,22 @@ static void io_apoll_task_func(struct io_kiocb *req, bool *locked)
if (ret == IOU_POLL_NO_ACTION)
return;
+ io_tw_lock(req->ctx, locked);
io_poll_remove_entries(req);
io_poll_tw_hash_eject(req, locked);
if (ret == IOU_POLL_REMOVE_POLL_USE_RES)
- io_req_complete_post(req);
+ io_req_task_complete(req, locked);
else if (ret == IOU_POLL_DONE)
io_req_task_submit(req, locked);
else
- io_req_complete_failed(req, ret);
+ io_req_defer_failed(req, ret);
}
static void __io_poll_execute(struct io_kiocb *req, int mask)
{
io_req_set_res(req, mask, 0);
- /*
- * This is useful for poll that is armed on behalf of another
- * request, and where the wakeup path could be on a different
- * CPU. We want to avoid pulling in req->apoll->events for that
- * case.
- */
+
if (req->opcode == IORING_OP_POLL_ADD)
req->io_task_work.func = io_poll_task_func;
else
@@ -429,6 +423,14 @@ static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
return 0;
if (io_poll_get_ownership(req)) {
+ /*
+ * If we trigger a multishot poll off our own wakeup path,
+ * disable multishot as there is a circular dependency between
+ * CQ posting and triggering the event.
+ */
+ if (mask & EPOLL_URING_WAKE)
+ poll->events |= EPOLLONESHOT;
+
/* optional, saves extra locking for removal in tw handler */
if (mask && poll->events & EPOLLONESHOT) {
list_del_init(&poll->wait.entry);
@@ -648,10 +650,13 @@ static struct async_poll *io_req_alloc_apoll(struct io_kiocb *req,
if (req->flags & REQ_F_POLLED) {
apoll = req->apoll;
kfree(apoll->double_poll);
- } else if (!(issue_flags & IO_URING_F_UNLOCKED) &&
- (entry = io_alloc_cache_get(&ctx->apoll_cache)) != NULL) {
+ } else if (!(issue_flags & IO_URING_F_UNLOCKED)) {
+ entry = io_alloc_cache_get(&ctx->apoll_cache);
+ if (entry == NULL)
+ goto alloc_apoll;
apoll = container_of(entry, struct async_poll, cache);
} else {
+alloc_apoll:
apoll = kmalloc(sizeof(*apoll), GFP_ATOMIC);
if (unlikely(!apoll))
return NULL;
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 55d4ab96fb92..133608200769 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -170,10 +170,10 @@ static void __io_rsrc_put_work(struct io_rsrc_node *ref_node)
if (prsrc->tag) {
if (ctx->flags & IORING_SETUP_IOPOLL) {
mutex_lock(&ctx->uring_lock);
- io_post_aux_cqe(ctx, prsrc->tag, 0, 0, true);
+ io_post_aux_cqe(ctx, prsrc->tag, 0, 0);
mutex_unlock(&ctx->uring_lock);
} else {
- io_post_aux_cqe(ctx, prsrc->tag, 0, 0, true);
+ io_post_aux_cqe(ctx, prsrc->tag, 0, 0);
}
}
@@ -321,6 +321,11 @@ __cold static int io_rsrc_ref_quiesce(struct io_rsrc_data *data,
if (atomic_dec_and_test(&data->refs))
break;
mutex_unlock(&ctx->uring_lock);
+
+ ret = io_run_task_work_sig(ctx);
+ if (ret < 0)
+ goto reinit;
+
flush_delayed_work(&ctx->rsrc_put_work);
ret = wait_for_completion_interruptible(&data->done);
if (!ret) {
@@ -336,12 +341,12 @@ __cold static int io_rsrc_ref_quiesce(struct io_rsrc_data *data,
}
}
+reinit:
atomic_inc(&data->refs);
/* wait for all works potentially completing data->done */
flush_delayed_work(&ctx->rsrc_put_work);
reinit_completion(&data->done);
- ret = io_run_task_work_sig(ctx);
mutex_lock(&ctx->uring_lock);
} while (ret >= 0);
data->quiesce = false;
diff --git a/io_uring/rw.c b/io_uring/rw.c
index fed5570be335..77576835a848 100644
--- a/io_uring/rw.c
+++ b/io_uring/rw.c
@@ -286,6 +286,12 @@ static inline int io_fixup_rw_res(struct io_kiocb *req, long res)
static void io_req_rw_complete(struct io_kiocb *req, bool *locked)
{
io_req_io_end(req);
+
+ if (req->flags & (REQ_F_BUFFER_SELECTED|REQ_F_BUFFER_RING)) {
+ unsigned issue_flags = *locked ? 0 : IO_URING_F_UNLOCKED;
+
+ req->cqe.flags |= io_put_kbuf(req, issue_flags);
+ }
io_req_task_complete(req, locked);
}
diff --git a/io_uring/timeout.c b/io_uring/timeout.c
index e8a8c2099480..5b4bc93fd6e0 100644
--- a/io_uring/timeout.c
+++ b/io_uring/timeout.c
@@ -63,7 +63,7 @@ static bool io_kill_timeout(struct io_kiocb *req, int status)
atomic_set(&req->ctx->cq_timeouts,
atomic_read(&req->ctx->cq_timeouts) + 1);
list_del_init(&timeout->list);
- io_req_tw_post_queue(req, status, 0);
+ io_req_queue_tw_complete(req, status);
return true;
}
return false;
@@ -159,7 +159,7 @@ void io_disarm_next(struct io_kiocb *req)
req->flags &= ~REQ_F_ARM_LTIMEOUT;
if (link && link->opcode == IORING_OP_LINK_TIMEOUT) {
io_remove_next_linked(req);
- io_req_tw_post_queue(link, -ECANCELED, 0);
+ io_req_queue_tw_complete(link, -ECANCELED);
}
} else if (req->flags & REQ_F_LINK_TIMEOUT) {
struct io_ring_ctx *ctx = req->ctx;
@@ -168,7 +168,7 @@ void io_disarm_next(struct io_kiocb *req)
link = io_disarm_linked_timeout(req);
spin_unlock_irq(&ctx->timeout_lock);
if (link)
- io_req_tw_post_queue(link, -ECANCELED, 0);
+ io_req_queue_tw_complete(link, -ECANCELED);
}
if (unlikely((req->flags & REQ_F_FAIL) &&
!(req->flags & REQ_F_HARDLINK)))
@@ -282,11 +282,11 @@ static void io_req_task_link_timeout(struct io_kiocb *req, bool *locked)
ret = io_try_cancel(req->task->io_uring, &cd, issue_flags);
}
io_req_set_res(req, ret ?: -ETIME, 0);
- io_req_complete_post(req);
+ io_req_task_complete(req, locked);
io_put_req(prev);
} else {
io_req_set_res(req, -ETIME, 0);
- io_req_complete_post(req);
+ io_req_task_complete(req, locked);
}
}
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index e50de0b6b9f8..446a189b78b0 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -56,7 +56,7 @@ void io_uring_cmd_done(struct io_uring_cmd *ioucmd, ssize_t ret, ssize_t res2)
/* order with io_iopoll_req_issued() checking ->iopoll_complete */
smp_store_release(&req->iopoll_completed, 1);
else
- __io_req_complete(req, 0);
+ io_req_complete_post(req, 0);
}
EXPORT_SYMBOL_GPL(io_uring_cmd_done);
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 20:14:15 +0000