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for-6.1/io_uring-2022-10-03

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Merge tag 'for-6.1/io_uring-2022-10-03' of git://git.kernel.dk/linux

Pull io_uring updates from Jens Axboe:

 - Add supported for more directly managed task_work running.

   This is beneficial for real world applications that end up issuing
   lots of system calls as part of handling work. Normal task_work will
   always execute as we transition in and out of the kernel, even for
   "unrelated" system calls. It's more efficient to defer the handling
   of io_uring's deferred work until the application wants it to be run,
   generally in batches.

   As part of ongoing work to write an io_uring network backend for
   Thrift, this has been shown to greatly improve performance. (Dylan)

 - Add IOPOLL support for passthrough (Kanchan)

 - Improvements and fixes to the send zero-copy support (Pavel)

 - Partial IO handling fixes (Pavel)

 - CQE ordering fixes around CQ ring overflow (Pavel)

 - Support sendto() for non-zc as well (Pavel)

 - Support sendmsg for zerocopy (Pavel)

 - Networking iov_iter fix (Stefan)

 - Misc fixes and cleanups (Pavel, me)

* tag 'for-6.1/io_uring-2022-10-03' of git://git.kernel.dk/linux: (56 commits)
  io_uring/net: fix notif cqe reordering
  io_uring/net: don't update msg_name if not provided
  io_uring: don't gate task_work run on TIF_NOTIFY_SIGNAL
  io_uring/rw: defer fsnotify calls to task context
  io_uring/net: fix fast_iov assignment in io_setup_async_msg()
  io_uring/net: fix non-zc send with address
  io_uring/net: don't skip notifs for failed requests
  io_uring/rw: don't lose short results on io_setup_async_rw()
  io_uring/rw: fix unexpected link breakage
  io_uring/net: fix cleanup double free free_iov init
  io_uring: fix CQE reordering
  io_uring/net: fix UAF in io_sendrecv_fail()
  selftest/net: adjust io_uring sendzc notif handling
  io_uring: ensure local task_work marks task as running
  io_uring/net: zerocopy sendmsg
  io_uring/net: combine fail handlers
  io_uring/net: rename io_sendzc()
  io_uring/net: support non-zerocopy sendto
  io_uring/net: refactor io_setup_async_addr
  io_uring/net: don't lose partial send_zc on fail
  ...
This commit is contained in:
Linus Torvalds 2022-10-07 08:52:43 -07:00
commit 0a78a376ef
30 changed files with 860 additions and 327 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/linux/blk-mq.h
View file

@ -980,6 +980,7 @@ int blk_rq_map_kern(struct request_queue *, struct request *, void *,
int blk_rq_append_bio(struct request *rq, struct bio *bio);
void blk_execute_rq_nowait(struct request *rq, bool at_head);
blk_status_t blk_execute_rq(struct request *rq, bool at_head);
bool blk_rq_is_poll(struct request *rq);
struct req_iterator {
struct bvec_iter iter;

2
include/linux/eventfd.h
View file

@ -46,7 +46,7 @@ void eventfd_ctx_do_read(struct eventfd_ctx *ctx, __u64 *cnt);
static inline bool eventfd_signal_allowed(void)
{
return !current->in_eventfd_signal;
return !current->in_eventfd;
}
#else /* CONFIG_EVENTFD */

2
include/linux/fs.h
View file

@ -2133,6 +2133,8 @@ struct file_operations {
loff_t len, unsigned int remap_flags);
int (*fadvise)(struct file *, loff_t, loff_t, int);
int (*uring_cmd)(struct io_uring_cmd *ioucmd, unsigned int issue_flags);
int (*uring_cmd_iopoll)(struct io_uring_cmd *, struct io_comp_batch *,
unsigned int poll_flags);
} __randomize_layout;
struct inode_operations {

8
include/linux/io_uring.h
View file

@ -20,8 +20,12 @@ enum io_uring_cmd_flags {
struct io_uring_cmd {
struct file *file;
const void *cmd;
/* callback to defer completions to task context */
void (*task_work_cb)(struct io_uring_cmd *cmd);
union {
/* callback to defer completions to task context */
void (*task_work_cb)(struct io_uring_cmd *cmd);
/* used for polled completion */
void *cookie;
};
u32 cmd_op;
u32 pad;
u8 pdu[32]; /* available inline for free use */

4
include/linux/io_uring_types.h
View file

@ -184,6 +184,8 @@ struct io_ev_fd {
struct eventfd_ctx *cq_ev_fd;
unsigned int eventfd_async: 1;
struct rcu_head rcu;
atomic_t refs;
atomic_t ops;
};
struct io_alloc_cache {
@ -301,6 +303,8 @@ struct io_ring_ctx {
struct io_hash_table cancel_table;
bool poll_multi_queue;
struct llist_head work_llist;
struct list_head io_buffers_comp;
} ____cacheline_aligned_in_smp;

2
include/linux/sched.h
View file

@ -936,7 +936,7 @@ struct task_struct {
#endif
#ifdef CONFIG_EVENTFD
/* Recursion prevention for eventfd_signal() */
unsigned in_eventfd_signal:1;
unsigned in_eventfd:1;
#endif
#ifdef CONFIG_IOMMU_SVA
unsigned pasid_activated:1;