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io_uring: dig out COMP_LOCK from deep call chain 

io_req_clean_work() checks REQ_F_COMP_LOCK to pass this two layers up.
Move the check up into __io_free_req(), so at least it doesn't looks so
ugly and would facilitate further changes.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2020-10-13 09:43:59 +01:00 committed by Jens Axboe
parent 6a0af224c2
commit 4edf20f999
1 changed files with 8 additions and 23 deletions
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31
fs/io_uring.c
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@ -1181,14 +1181,10 @@ static void __io_commit_cqring(struct io_ring_ctx *ctx)
}
}
/*
* Returns true if we need to defer file table putting. This can only happen
* from the error path with REQ_F_COMP_LOCKED set.
*/
static bool io_req_clean_work(struct io_kiocb *req)
static void io_req_clean_work(struct io_kiocb *req)
{
if (!(req->flags & REQ_F_WORK_INITIALIZED))
return false;
return;
req->flags &= ~REQ_F_WORK_INITIALIZED;
@ -1207,9 +1203,6 @@ static bool io_req_clean_work(struct io_kiocb *req)
if (req->work.fs) {
struct fs_struct *fs = req->work.fs;
if (req->flags & REQ_F_COMP_LOCKED)
return true;
spin_lock(&req->work.fs->lock);
if (--fs->users)
fs = NULL;
@ -1218,8 +1211,6 @@ static bool io_req_clean_work(struct io_kiocb *req)
free_fs_struct(fs);
req->work.fs = NULL;
}
return false;
}
static void io_prep_async_work(struct io_kiocb *req)
@ -1699,7 +1690,7 @@ static inline void io_put_file(struct io_kiocb *req, struct file *file,
fput(file);
}
static bool io_dismantle_req(struct io_kiocb *req)
static void io_dismantle_req(struct io_kiocb *req)
{
io_clean_op(req);
@ -1708,7 +1699,7 @@ static bool io_dismantle_req(struct io_kiocb *req)
if (req->file)
io_put_file(req, req->file, (req->flags & REQ_F_FIXED_FILE));
return io_req_clean_work(req);
io_req_clean_work(req);
}
static void __io_free_req_finish(struct io_kiocb *req)
@ -1731,21 +1722,15 @@ static void __io_free_req_finish(struct io_kiocb *req)
static void io_req_task_file_table_put(struct callback_head *cb)
{
struct io_kiocb *req = container_of(cb, struct io_kiocb, task_work);
struct fs_struct *fs = req->work.fs;
spin_lock(&req->work.fs->lock);
if (--fs->users)
fs = NULL;
spin_unlock(&req->work.fs->lock);
if (fs)
free_fs_struct(fs);
req->work.fs = NULL;
io_dismantle_req(req);
__io_free_req_finish(req);
}
static void __io_free_req(struct io_kiocb *req)
{
if (!io_dismantle_req(req)) {
if (!(req->flags & REQ_F_COMP_LOCKED)) {
io_dismantle_req(req);
__io_free_req_finish(req);
} else {
int ret;
@ -2057,7 +2042,7 @@ static void io_req_free_batch(struct req_batch *rb, struct io_kiocb *req)
}
rb->task_refs++;
WARN_ON_ONCE(io_dismantle_req(req));
io_dismantle_req(req);
rb->reqs[rb->to_free++] = req;
if (unlikely(rb->to_free == ARRAY_SIZE(rb->reqs)))
__io_req_free_batch_flush(req->ctx, rb);