iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

io_uring: kill fasync

Browse Source 
We have never supported fasync properly, it would only fire when there
is something polling io_uring making it useless. The original support came
in through the initial io_uring merge for 5.1. Since it's broken and
nobody has reported it, get rid of the fasync bits.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2f7ca3d344d406d34fa6713824198915c41cea86.1633080236.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-10-01 10:39:33 +01:00 committed by Jens Axboe
parent 78f8876c2d
commit 3f008385d4
1 changed files with 2 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
fs/io_uring.c
View File

@ -403,7 +403,6 @@ struct io_ring_ctx {
struct wait_queue_head cq_wait;
unsigned cq_extra;
atomic_t cq_timeouts;
struct fasync_struct *cq_fasync;
unsigned cq_last_tm_flush;
} ____cacheline_aligned_in_smp;
@ -1614,10 +1613,8 @@ static void io_cqring_ev_posted(struct io_ring_ctx *ctx)
wake_up(&ctx->sq_data->wait);
if (io_should_trigger_evfd(ctx))
eventfd_signal(ctx->cq_ev_fd, 1);
if (waitqueue_active(&ctx->poll_wait)) {
if (waitqueue_active(&ctx->poll_wait))
wake_up_interruptible(&ctx->poll_wait);
kill_fasync(&ctx->cq_fasync, SIGIO, POLL_IN);
}
}
static void io_cqring_ev_posted_iopoll(struct io_ring_ctx *ctx)
@ -1631,10 +1628,8 @@ static void io_cqring_ev_posted_iopoll(struct io_ring_ctx *ctx)
}
if (io_should_trigger_evfd(ctx))
eventfd_signal(ctx->cq_ev_fd, 1);
if (waitqueue_active(&ctx->poll_wait)) {
if (waitqueue_active(&ctx->poll_wait))
wake_up_interruptible(&ctx->poll_wait);
kill_fasync(&ctx->cq_fasync, SIGIO, POLL_IN);
}
}
/* Returns true if there are no backlogged entries after the flush */
@ -9345,13 +9340,6 @@ static __poll_t io_uring_poll(struct file *file, poll_table *wait)
return mask;
}
static int io_uring_fasync(int fd, struct file *file, int on)
{
struct io_ring_ctx *ctx = file->private_data;
return fasync_helper(fd, file, on, &ctx->cq_fasync);
}
static int io_unregister_personality(struct io_ring_ctx *ctx, unsigned id)
{
const struct cred *creds;
@ -10145,7 +10133,6 @@ static const struct file_operations io_uring_fops = {
.mmap_capabilities = io_uring_nommu_mmap_capabilities,
#endif
.poll = io_uring_poll,
.fasync = io_uring_fasync,
#ifdef CONFIG_PROC_FS
.show_fdinfo = io_uring_show_fdinfo,
#endif