This is a note to let you know that I've just added the patch titled
io_uring/unix: drop usage of io_uring socket
to the 6.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
io_uring-unix-drop-usage-of-io_uring-socket.patch
and it can be found in the queue-6.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1f1e17c843df1bd98c03ee2d5469531dfbbc50b8
Author: Jens Axboe <axboe@xxxxxxxxx>
Date: Tue Dec 19 12:30:43 2023 -0700
io_uring/unix: drop usage of io_uring socket
Commit a4104821ad651d8a0b374f0b2474c345bbb42f82 upstream.
Since we no longer allow sending io_uring fds over SCM_RIGHTS, move to
using io_is_uring_fops() to detect whether this is a io_uring fd or not.
With that done, kill off io_uring_get_socket() as nobody calls it
anymore.
This is in preparation to yanking out the rest of the core related to
unix gc with io_uring.
Signed-off-by: Jens Axboe <axboe@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/linux/io_uring.h b/include/linux/io_uring.h
index aefb73eeeebff..b3a32687f5143 100644
--- a/include/linux/io_uring.h
+++ b/include/linux/io_uring.h
@@ -93,6 +93,7 @@ int io_uring_cmd_sock(struct io_uring_cmd *cmd, unsigned int issue_flags);
void io_uring_cmd_mark_cancelable(struct io_uring_cmd *cmd,
unsigned int issue_flags);
struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd);
+bool io_is_uring_fops(struct file *file);
#else
static inline int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,
struct iov_iter *iter, void *ioucmd)
@@ -111,10 +112,6 @@ static inline void io_uring_cmd_do_in_task_lazy(struct io_uring_cmd *ioucmd,
void (*task_work_cb)(struct io_uring_cmd *, unsigned))
{
}
-static inline struct sock *io_uring_get_socket(struct file *file)
-{
- return NULL;
-}
static inline void io_uring_task_cancel(void)
{
}
@@ -141,6 +138,10 @@ static inline struct task_struct *io_uring_cmd_get_task(struct io_uring_cmd *cmd
{
return NULL;
}
+static inline bool io_is_uring_fops(struct file *file)
+{
+ return false;
+}
#endif
#endif
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index 59f5791c90c31..06bd8795a87d1 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -177,19 +177,6 @@ static struct ctl_table kernel_io_uring_disabled_table[] = {
};
#endif
-struct sock *io_uring_get_socket(struct file *file)
-{
-#if defined(CONFIG_UNIX)
- if (io_is_uring_fops(file)) {
- struct io_ring_ctx *ctx = file->private_data;
-
- return ctx->ring_sock->sk;
- }
-#endif
- return NULL;
-}
-EXPORT_SYMBOL(io_uring_get_socket);
-
static inline void io_submit_flush_completions(struct io_ring_ctx *ctx)
{
if (!wq_list_empty(&ctx->submit_state.compl_reqs) ||
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h
index c9992cd7f1385..0d66a7058dbe1 100644
--- a/io_uring/io_uring.h
+++ b/io_uring/io_uring.h
@@ -61,7 +61,6 @@ struct file *io_file_get_fixed(struct io_kiocb *req, int fd,
unsigned issue_flags);
void __io_req_task_work_add(struct io_kiocb *req, unsigned flags);
-bool io_is_uring_fops(struct file *file);
bool io_alloc_async_data(struct io_kiocb *req);
void io_req_task_queue(struct io_kiocb *req);
void io_queue_iowq(struct io_kiocb *req, struct io_tw_state *ts_dont_use);
diff --git a/net/core/scm.c b/net/core/scm.c
index 7dc47c17d8638..737917c7ac627 100644
--- a/net/core/scm.c
+++ b/net/core/scm.c
@@ -105,7 +105,7 @@ static int scm_fp_copy(struct cmsghdr *cmsg, struct scm_fp_list **fplp)
if (fd < 0 || !(file = fget_raw(fd)))
return -EBADF;
/* don't allow io_uring files */
- if (io_uring_get_socket(file)) {
+ if (io_is_uring_fops(file)) {
fput(file);
return -EINVAL;
}
diff --git a/net/unix/scm.c b/net/unix/scm.c
index 6ff628f2349f5..822ce0d0d7915 100644
--- a/net/unix/scm.c
+++ b/net/unix/scm.c
@@ -35,10 +35,8 @@ struct sock *unix_get_socket(struct file *filp)
/* PF_UNIX ? */
if (s && ops && ops->family == PF_UNIX)
u_sock = s;
- } else {
- /* Could be an io_uring instance */
- u_sock = io_uring_get_socket(filp);
}
+
return u_sock;
}
EXPORT_SYMBOL(unix_get_socket);
