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authorJens Axboe <axboe@kernel.dk>2023-07-11 01:14:37 +0300
committerJens Axboe <axboe@kernel.dk>2023-09-21 21:04:45 +0300
commitf31ecf671ddc498f20219453395794ff2383e06b (patch)
tree41835b9eb01ecf14ee7f16e428158601b34e4748 /io_uring/Makefile
parent2e521a2064bf8b26cf178c0f7644a70ed1a512fa (diff)
downloadlinux-f31ecf671ddc498f20219453395794ff2383e06b.tar.xz
io_uring: add IORING_OP_WAITID support
This adds support for an async version of waitid(2), in a fully async version. If an event isn't immediately available, wait for a callback to trigger a retry. The format of the sqe is as follows: sqe->len The 'which', the idtype being queried/waited for. sqe->fd The 'pid' (or id) being waited for. sqe->file_index The 'options' being set. sqe->addr2 A pointer to siginfo_t, if any, being filled in. buf_index, add3, and waitid_flags are reserved/unused for now. waitid_flags will be used for options for this request type. One interesting use case may be to add multi-shot support, so that the request stays armed and posts a notification every time a monitored process state change occurs. Note that this does not support rusage, on Arnd's recommendation. See the waitid(2) man page for details on the arguments. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/Makefile')
-rw-r--r--io_uring/Makefile3
1 files changed, 2 insertions, 1 deletions
diff --git a/io_uring/Makefile b/io_uring/Makefile
index 8cc8e5387a75..7bd64e442567 100644
--- a/io_uring/Makefile
+++ b/io_uring/Makefile
@@ -7,5 +7,6 @@ obj-$(CONFIG_IO_URING) += io_uring.o xattr.o nop.o fs.o splice.o \
openclose.o uring_cmd.o epoll.o \
statx.o net.o msg_ring.o timeout.o \
sqpoll.o fdinfo.o tctx.o poll.o \
- cancel.o kbuf.o rsrc.o rw.o opdef.o notif.o
+ cancel.o kbuf.o rsrc.o rw.o opdef.o \
+ notif.o waitid.o
obj-$(CONFIG_IO_WQ) += io-wq.o