From: Pavel Begunkov <asml.silence@gmail.com>
To: Jens Axboe <axboe@kernel.dk>, io-uring@vger.kernel.org
Cc: stable@vger.kernel.org
Subject: [PATCH 1/4] io_uring: add a helper for setting a ref node
Date: Wed, 30 Dec 2020 21:34:14 +0000 [thread overview]
Message-ID: <2fecebc9ab028ca5ea52198b615c30fab6151114.1609361865.git.asml.silence@gmail.com> (raw)
In-Reply-To: <cover.1609361865.git.asml.silence@gmail.com>
Setting a new reference node to a file data is not trivial, don't repeat
it, add and use a helper.
Cc: stable@vger.kernel.org # 5.6+
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
---
fs/io_uring.c | 22 ++++++++++++----------
1 file changed, 12 insertions(+), 10 deletions(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c
index eb4620ff638e..6372aba8d0c2 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -7231,6 +7231,16 @@ static void io_file_ref_kill(struct percpu_ref *ref)
complete(&data->done);
}
+static void io_sqe_files_set_node(struct fixed_file_data *file_data,
+ struct fixed_file_ref_node *ref_node)
+{
+ spin_lock_bh(&file_data->lock);
+ file_data->node = ref_node;
+ list_add_tail(&ref_node->node, &file_data->ref_list);
+ spin_unlock_bh(&file_data->lock);
+ percpu_ref_get(&file_data->refs);
+}
+
static int io_sqe_files_unregister(struct io_ring_ctx *ctx)
{
struct fixed_file_data *data = ctx->file_data;
@@ -7758,11 +7768,7 @@ static int io_sqe_files_register(struct io_ring_ctx *ctx, void __user *arg,
return PTR_ERR(ref_node);
}
- file_data->node = ref_node;
- spin_lock_bh(&file_data->lock);
- list_add_tail(&ref_node->node, &file_data->ref_list);
- spin_unlock_bh(&file_data->lock);
- percpu_ref_get(&file_data->refs);
+ io_sqe_files_set_node(file_data, ref_node);
return ret;
out_fput:
for (i = 0; i < ctx->nr_user_files; i++) {
@@ -7918,11 +7924,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
if (needs_switch) {
percpu_ref_kill(&data->node->refs);
- spin_lock_bh(&data->lock);
- list_add_tail(&ref_node->node, &data->ref_list);
- data->node = ref_node;
- spin_unlock_bh(&data->lock);
- percpu_ref_get(&ctx->file_data->refs);
+ io_sqe_files_set_node(data, ref_node);
} else
destroy_fixed_file_ref_node(ref_node);
--
2.24.0
next prev parent reply other threads:[~2020-12-30 21:38 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-30 21:34 [PATCH 0/4] address some hangs Pavel Begunkov
2020-12-30 21:34 ` Pavel Begunkov [this message]
2020-12-30 21:34 ` [PATCH 2/4] io_uring: fix io_sqe_files_unregister() hangs Pavel Begunkov
2020-12-30 21:34 ` [PATCH 3/4] kernel/io_uring: cancel io_uring before task works Pavel Begunkov
2021-01-02 16:01 ` Pavel Begunkov
2020-12-30 21:34 ` [PATCH 4/4] io_uring: cancel requests enqueued as task_work's Pavel Begunkov
2020-12-31 15:06 ` Jens Axboe
2020-12-31 15:07 ` [PATCH 0/4] address some hangs Jens Axboe
2020-12-31 16:40 ` Pavel Begunkov
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