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io_uring: convert timeout path to use io_cmd_type

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Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2022-05-24 09:45:22 -06:00
parent f38987f09a
commit a43714ace5
1 changed files with 68 additions and 49 deletions
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117
io_uring/io_uring.c
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@ -979,8 +979,6 @@ struct io_kiocb {
*/
struct file *file;
struct io_cmd_data cmd;
struct io_timeout timeout;
struct io_timeout_rem timeout_rem;
struct io_open open;
struct io_close close;
struct io_rsrc_update rsrc_update;
@ -1652,7 +1650,9 @@ static __cold void io_ring_ctx_ref_free(struct percpu_ref *ref)
static inline bool io_is_timeout_noseq(struct io_kiocb *req)
{
return !req->timeout.off;
struct io_timeout *timeout = io_kiocb_to_cmd(req);
return !timeout->off;
}
static __cold void io_fallback_req_func(struct work_struct *work)
@ -1898,11 +1898,13 @@ static void io_kill_timeout(struct io_kiocb *req, int status)
struct io_timeout_data *io = req->async_data;
if (hrtimer_try_to_cancel(&io->timer) != -1) {
struct io_timeout *timeout = io_kiocb_to_cmd(req);
if (status)
req_set_fail(req);
atomic_set(&req->ctx->cq_timeouts,
atomic_read(&req->ctx->cq_timeouts) + 1);
list_del_init(&req->timeout.list);
list_del_init(&timeout->list);
io_req_tw_post_queue(req, status, 0);
}
}
@ -1925,10 +1927,11 @@ static __cold void io_flush_timeouts(struct io_ring_ctx *ctx)
__must_hold(&ctx->completion_lock)
{
u32 seq = ctx->cached_cq_tail - atomic_read(&ctx->cq_timeouts);
struct io_kiocb *req, *tmp;
struct io_timeout *timeout, *tmp;
spin_lock_irq(&ctx->timeout_lock);
list_for_each_entry_safe(req, tmp, &ctx->timeout_list, timeout.list) {
list_for_each_entry_safe(timeout, tmp, &ctx->timeout_list, list) {
struct io_kiocb *req = cmd_to_io_kiocb(timeout);
u32 events_needed, events_got;
if (io_is_timeout_noseq(req))
@ -1941,7 +1944,7 @@ static __cold void io_flush_timeouts(struct io_ring_ctx *ctx)
* these subtractions won't have wrapped, so we can check if
* target is in [last_seq, current_seq] by comparing the two.
*/
events_needed = req->timeout.target_seq - ctx->cq_last_tm_flush;
events_needed = timeout->target_seq - ctx->cq_last_tm_flush;
events_got = seq - ctx->cq_last_tm_flush;
if (events_got < events_needed)
break;
@ -2546,11 +2549,12 @@ static struct io_kiocb *io_disarm_linked_timeout(struct io_kiocb *req)
if (link && link->opcode == IORING_OP_LINK_TIMEOUT) {
struct io_timeout_data *io = link->async_data;
struct io_timeout *timeout = io_kiocb_to_cmd(link);
io_remove_next_linked(req);
link->timeout.head = NULL;
timeout->head = NULL;
if (hrtimer_try_to_cancel(&io->timer) != -1) {
list_del(&link->timeout.list);
list_del(&timeout->list);
return link;
}
}
@ -7302,11 +7306,12 @@ static enum hrtimer_restart io_timeout_fn(struct hrtimer *timer)
struct io_timeout_data *data = container_of(timer,
struct io_timeout_data, timer);
struct io_kiocb *req = data->req;
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_ring_ctx *ctx = req->ctx;
unsigned long flags;
spin_lock_irqsave(&ctx->timeout_lock, flags);
list_del_init(&req->timeout.list);
list_del_init(&timeout->list);
atomic_set(&req->ctx->cq_timeouts,
atomic_read(&req->ctx->cq_timeouts) + 1);
spin_unlock_irqrestore(&ctx->timeout_lock, flags);
@ -7324,29 +7329,32 @@ static struct io_kiocb *io_timeout_extract(struct io_ring_ctx *ctx,
struct io_cancel_data *cd)
__must_hold(&ctx->timeout_lock)
{
struct io_timeout *timeout;
struct io_timeout_data *io;
struct io_kiocb *req;
bool found = false;
struct io_kiocb *req = NULL;
list_for_each_entry(timeout, &ctx->timeout_list, list) {
struct io_kiocb *tmp = cmd_to_io_kiocb(timeout);
list_for_each_entry(req, &ctx->timeout_list, timeout.list) {
if (!(cd->flags & IORING_ASYNC_CANCEL_ANY) &&
cd->data != req->cqe.user_data)
cd->data != tmp->cqe.user_data)
continue;
if (cd->flags & (IORING_ASYNC_CANCEL_ALL|IORING_ASYNC_CANCEL_ANY)) {
if (cd->seq == req->work.cancel_seq)
if (cd->seq == tmp->work.cancel_seq)
continue;
req->work.cancel_seq = cd->seq;
tmp->work.cancel_seq = cd->seq;
}
found = true;
req = tmp;
break;
}
if (!found)
if (!req)
return ERR_PTR(-ENOENT);
io = req->async_data;
if (hrtimer_try_to_cancel(&io->timer) == -1)
return ERR_PTR(-EALREADY);
list_del_init(&req->timeout.list);
timeout = io_kiocb_to_cmd(req);
list_del_init(&timeout->list);
return req;
}
@ -7386,15 +7394,18 @@ static int io_linked_timeout_update(struct io_ring_ctx *ctx, __u64 user_data,
__must_hold(&ctx->timeout_lock)
{
struct io_timeout_data *io;
struct io_kiocb *req;
bool found = false;
struct io_timeout *timeout;
struct io_kiocb *req = NULL;
list_for_each_entry(req, &ctx->ltimeout_list, timeout.list) {
found = user_data == req->cqe.user_data;
if (found)
list_for_each_entry(timeout, &ctx->ltimeout_list, list) {
struct io_kiocb *tmp = cmd_to_io_kiocb(timeout);
if (user_data == tmp->cqe.user_data) {
req = tmp;
break;
}
}
if (!found)
if (!req)
return -ENOENT;
io = req->async_data;
@ -7412,14 +7423,15 @@ static int io_timeout_update(struct io_ring_ctx *ctx, __u64 user_data,
{
struct io_cancel_data cd = { .data = user_data, };
struct io_kiocb *req = io_timeout_extract(ctx, &cd);
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_timeout_data *data;
if (IS_ERR(req))
return PTR_ERR(req);
req->timeout.off = 0; /* noseq */
timeout->off = 0; /* noseq */
data = req->async_data;
list_add_tail(&req->timeout.list, &ctx->timeout_list);
list_add_tail(&timeout->list, &ctx->timeout_list);
hrtimer_init(&data->timer, io_timeout_get_clock(data), mode);
data->timer.function = io_timeout_fn;
hrtimer_start(&data->timer, timespec64_to_ktime(*ts), mode);
@ -7429,7 +7441,7 @@ static int io_timeout_update(struct io_ring_ctx *ctx, __u64 user_data,
static int io_timeout_remove_prep(struct io_kiocb *req,
const struct io_uring_sqe *sqe)
{
struct io_timeout_rem *tr = &req->timeout_rem;
struct io_timeout_rem *tr = io_kiocb_to_cmd(req);
if (unlikely(req->flags & (REQ_F_FIXED_FILE | REQ_F_BUFFER_SELECT)))
return -EINVAL;
@ -7469,11 +7481,11 @@ static inline enum hrtimer_mode io_translate_timeout_mode(unsigned int flags)
*/
static int io_timeout_remove(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_timeout_rem *tr = &req->timeout_rem;
struct io_timeout_rem *tr = io_kiocb_to_cmd(req);
struct io_ring_ctx *ctx = req->ctx;
int ret;
if (!(req->timeout_rem.flags & IORING_TIMEOUT_UPDATE)) {
if (!(tr->flags & IORING_TIMEOUT_UPDATE)) {
struct io_cancel_data cd = { .data = tr->addr, };
spin_lock(&ctx->completion_lock);
@ -7500,6 +7512,7 @@ static int __io_timeout_prep(struct io_kiocb *req,
const struct io_uring_sqe *sqe,
bool is_timeout_link)
{
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_timeout_data *data;
unsigned flags;
u32 off = READ_ONCE(sqe->off);
@ -7516,8 +7529,8 @@ static int __io_timeout_prep(struct io_kiocb *req,
if (hweight32(flags & IORING_TIMEOUT_CLOCK_MASK) > 1)
return -EINVAL;
INIT_LIST_HEAD(&req->timeout.list);
req->timeout.off = off;
INIT_LIST_HEAD(&timeout->list);
timeout->off = off;
if (unlikely(off && !req->ctx->off_timeout_used))
req->ctx->off_timeout_used = true;
@ -7536,7 +7549,7 @@ static int __io_timeout_prep(struct io_kiocb *req,
if (data->ts.tv_sec < 0 || data->ts.tv_nsec < 0)
return -EINVAL;
INIT_LIST_HEAD(&req->timeout.list);
INIT_LIST_HEAD(&timeout->list);
data->mode = io_translate_timeout_mode(flags);
hrtimer_init(&data->timer, io_timeout_get_clock(data), data->mode);
@ -7547,7 +7560,7 @@ static int __io_timeout_prep(struct io_kiocb *req,
return -EINVAL;
if (link->last->opcode == IORING_OP_LINK_TIMEOUT)
return -EINVAL;
req->timeout.head = link->last;
timeout->head = link->last;
link->last->flags |= REQ_F_ARM_LTIMEOUT;
}
return 0;
@ -7567,10 +7580,11 @@ static int io_link_timeout_prep(struct io_kiocb *req,
static int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
{
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_ring_ctx *ctx = req->ctx;
struct io_timeout_data *data = req->async_data;
struct list_head *entry;
u32 tail, off = req->timeout.off;
u32 tail, off = timeout->off;
spin_lock_irq(&ctx->timeout_lock);
@ -7585,7 +7599,7 @@ static int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
}
tail = ctx->cached_cq_tail - atomic_read(&ctx->cq_timeouts);
req->timeout.target_seq = tail + off;
timeout->target_seq = tail + off;
/* Update the last seq here in case io_flush_timeouts() hasn't.
* This is safe because ->completion_lock is held, and submissions
@ -7598,17 +7612,17 @@ static int io_timeout(struct io_kiocb *req, unsigned int issue_flags)
* the one we need first.
*/
list_for_each_prev(entry, &ctx->timeout_list) {
struct io_kiocb *nxt = list_entry(entry, struct io_kiocb,
timeout.list);
struct io_timeout *nextt = list_entry(entry, struct io_timeout, list);
struct io_kiocb *nxt = cmd_to_io_kiocb(nextt);
if (io_is_timeout_noseq(nxt))
continue;
/* nxt.seq is behind @tail, otherwise would've been completed */
if (off >= nxt->timeout.target_seq - tail)
if (off >= nextt->target_seq - tail)
break;
}
add:
list_add(&req->timeout.list, entry);
list_add(&timeout->list, entry);
data->timer.function = io_timeout_fn;
hrtimer_start(&data->timer, timespec64_to_ktime(data->ts), data->mode);
spin_unlock_irq(&ctx->timeout_lock);
@ -8198,7 +8212,8 @@ static struct file *io_file_get_normal(struct io_kiocb *req, int fd)
static void io_req_task_link_timeout(struct io_kiocb *req, bool *locked)
{
struct io_kiocb *prev = req->timeout.prev;
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_kiocb *prev = timeout->prev;
int ret = -ENOENT;
if (prev) {
@ -8222,12 +8237,13 @@ static enum hrtimer_restart io_link_timeout_fn(struct hrtimer *timer)
struct io_timeout_data *data = container_of(timer,
struct io_timeout_data, timer);
struct io_kiocb *prev, *req = data->req;
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_ring_ctx *ctx = req->ctx;
unsigned long flags;
spin_lock_irqsave(&ctx->timeout_lock, flags);
prev = req->timeout.head;
req->timeout.head = NULL;
prev = timeout->head;
timeout->head = NULL;
/*
* We don't expect the list to be empty, that will only happen if we
@ -8238,8 +8254,8 @@ static enum hrtimer_restart io_link_timeout_fn(struct hrtimer *timer)
if (!req_ref_inc_not_zero(prev))
prev = NULL;
}
list_del(&req->timeout.list);
req->timeout.prev = prev;
list_del(&timeout->list);
timeout->prev = prev;
spin_unlock_irqrestore(&ctx->timeout_lock, flags);
req->io_task_work.func = io_req_task_link_timeout;
@ -8249,6 +8265,7 @@ static enum hrtimer_restart io_link_timeout_fn(struct hrtimer *timer)
static void io_queue_linked_timeout(struct io_kiocb *req)
{
struct io_timeout *timeout = io_kiocb_to_cmd(req);
struct io_ring_ctx *ctx = req->ctx;
spin_lock_irq(&ctx->timeout_lock);
@ -8256,13 +8273,13 @@ static void io_queue_linked_timeout(struct io_kiocb *req)
* If the back reference is NULL, then our linked request finished
* before we got a chance to setup the timer
*/
if (req->timeout.head) {
if (timeout->head) {
struct io_timeout_data *data = req->async_data;
data->timer.function = io_link_timeout_fn;
hrtimer_start(&data->timer, timespec64_to_ktime(data->ts),
data->mode);
list_add_tail(&req->timeout.list, &ctx->ltimeout_list);
list_add_tail(&timeout->list, &ctx->ltimeout_list);
}
spin_unlock_irq(&ctx->timeout_lock);
/* drop submission reference */
@ -10930,12 +10947,14 @@ static __cold void io_ring_exit_work(struct work_struct *work)
static __cold bool io_kill_timeouts(struct io_ring_ctx *ctx,
struct task_struct *tsk, bool cancel_all)
{
struct io_kiocb *req, *tmp;
struct io_timeout *timeout, *tmp;
int canceled = 0;
spin_lock(&ctx->completion_lock);
spin_lock_irq(&ctx->timeout_lock);
list_for_each_entry_safe(req, tmp, &ctx->timeout_list, timeout.list) {
list_for_each_entry_safe(timeout, tmp, &ctx->timeout_list, list) {
struct io_kiocb *req = cmd_to_io_kiocb(timeout);
if (io_match_task(req, tsk, cancel_all)) {
io_kill_timeout(req, -ECANCELED);
canceled++;