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Code Issues Releases Wiki Activity

io_uring: refactor io_sq_offload_create()

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Just a bit of code tossing in io_sq_offload_create(), so it looks a bit
better. No functional changes.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/939776f90de8d2cdd0414e1baa29c8ec0926b561.1618916549.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-04-20 12:03:33 +01:00 committed by Jens Axboe
parent 07db298a1c
commit f2a48dd09b
1 changed files with 6 additions and 14 deletions
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20
fs/io_uring.c
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@ -7879,11 +7879,9 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx,
f = fdget(p->wq_fd);
if (!f.file)
return -ENXIO;
if (f.file->f_op != &io_uring_fops) {
fdput(f);
return -EINVAL;
}
fdput(f);
if (f.file->f_op != &io_uring_fops)
return -EINVAL;
}
if (ctx->flags & IORING_SETUP_SQPOLL) {
struct task_struct *tsk;
@ -7902,13 +7900,11 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx,
if (!ctx->sq_thread_idle)
ctx->sq_thread_idle = HZ;
ret = 0;
io_sq_thread_park(sqd);
list_add(&ctx->sqd_list, &sqd->ctx_list);
io_sqd_update_thread_idle(sqd);
/* don't attach to a dying SQPOLL thread, would be racy */
if (attached && !sqd->thread)
ret = -ENXIO;
ret = (attached && !sqd->thread) ? -ENXIO : 0;
io_sq_thread_unpark(sqd);
if (ret < 0)
@ -7920,11 +7916,8 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx,
int cpu = p->sq_thread_cpu;
ret = -EINVAL;
if (cpu >= nr_cpu_ids)
if (cpu >= nr_cpu_ids || !cpu_online(cpu))
goto err_sqpoll;
if (!cpu_online(cpu))
goto err_sqpoll;
sqd->sq_cpu = cpu;
} else {
sqd->sq_cpu = -1;
@ -7950,12 +7943,11 @@ static int io_sq_offload_create(struct io_ring_ctx *ctx,
}
return 0;
err_sqpoll:
complete(&ctx->sq_data->exited);
err:
io_sq_thread_finish(ctx);
return ret;
err_sqpoll:
complete(&ctx->sq_data->exited);
goto err;
}
static inline void __io_unaccount_mem(struct user_struct *user,