Merge tag 'for-5.6/io_uring-vfs-2020-01-29' of git://git.kernel.dk/linux-block

Pull io_uring updates from Jens Axboe:

 - Support for various new opcodes (fallocate, openat, close, statx,
   fadvise, madvise, openat2, non-vectored read/write, send/recv, and
   epoll_ctl)

 - Faster ring quiesce for fileset updates

 - Optimizations for overflow condition checking

 - Support for max-sized clamping

 - Support for probing what opcodes are supported

 - Support for io-wq backend sharing between "sibling" rings

 - Support for registering personalities

 - Lots of little fixes and improvements

* tag 'for-5.6/io_uring-vfs-2020-01-29' of git://git.kernel.dk/linux-block: (64 commits)
  io_uring: add support for epoll_ctl(2)
  eventpoll: support non-blocking do_epoll_ctl() calls
  eventpoll: abstract out epoll_ctl() handler
  io_uring: fix linked command file table usage
  io_uring: support using a registered personality for commands
  io_uring: allow registering credentials
  io_uring: add io-wq workqueue sharing
  io-wq: allow grabbing existing io-wq
  io_uring/io-wq: don't use static creds/mm assignments
  io-wq: make the io_wq ref counted
  io_uring: fix refcounting with batched allocations at OOM
  io_uring: add comment for drain_next
  io_uring: don't attempt to copy iovec for READ/WRITE
  io_uring: honor IOSQE_ASYNC for linked reqs
  io_uring: prep req when do IOSQE_ASYNC
  io_uring: use labeled array init in io_op_defs
  io_uring: optimise sqe-to-req flags translation
  io_uring: remove REQ_F_IO_DRAINED
  io_uring: file switch work needs to get flushed on exit
  io_uring: hide uring_fd in ctx
  ...

1 files changed, 7 insertions, 4 deletions

diff --git a/fs/io-wq.h b/fs/io-wq.h
index 3f5e356de980..50b3378febf2 100644
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -7,11 +7,11 @@ enum {
 	IO_WQ_WORK_CANCEL	= 1,
 	IO_WQ_WORK_HAS_MM	= 2,
 	IO_WQ_WORK_HASHED	= 4,
-	IO_WQ_WORK_NEEDS_USER	= 8,
-	IO_WQ_WORK_NEEDS_FILES	= 16,
 	IO_WQ_WORK_UNBOUND	= 32,
 	IO_WQ_WORK_INTERNAL	= 64,
 	IO_WQ_WORK_CB		= 128,
+	IO_WQ_WORK_NO_CANCEL	= 256,
+	IO_WQ_WORK_CONCURRENT	= 512,
 
 	IO_WQ_HASH_SHIFT	= 24,	/* upper 8 bits are used for hash key */
 };
@@ -72,6 +72,8 @@ struct io_wq_work {
 	};
 	void (*func)(struct io_wq_work **);
 	struct files_struct *files;
+	struct mm_struct *mm;
+	const struct cred *creds;
 	unsigned flags;
 };
 
@@ -81,21 +83,22 @@ struct io_wq_work {
 		(work)->func = _func;			\
 		(work)->flags = 0;			\
 		(work)->files = NULL;			\
+		(work)->mm = NULL;			\
+		(work)->creds = NULL;			\
 	} while (0)					\
 
 typedef void (get_work_fn)(struct io_wq_work *);
 typedef void (put_work_fn)(struct io_wq_work *);
 
 struct io_wq_data {
-	struct mm_struct *mm;
 	struct user_struct *user;
-	const struct cred *creds;
 
 	get_work_fn *get_work;
 	put_work_fn *put_work;
 };
 
 struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data);
+bool io_wq_get(struct io_wq *wq, struct io_wq_data *data);
 void io_wq_destroy(struct io_wq *wq);
 
 void io_wq_enqueue(struct io_wq *wq, struct io_wq_work *work);