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eventpoll: support non-blocking do_epoll_ctl() calls

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Also make it available outside of epoll, along with the helper that
decides if we need to copy the passed in epoll_event.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe
2020-01-08 15:05:37 -07:00
parent 58e41a44c4
commit 39220e8d4a
2 changed files with 42 additions and 13 deletions
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9
include/linux/eventpoll.h
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@@ -61,6 +61,15 @@ static inline void eventpoll_release(struct file *file)
eventpoll_release_file(file);
}
int do_epoll_ctl(int epfd, int op, int fd, struct epoll_event *epds,
bool nonblock);
/* Tells if the epoll_ctl(2) operation needs an event copy from userspace */
static inline int ep_op_has_event(int op)
{
return op != EPOLL_CTL_DEL;
}
#else
static inline void eventpoll_init_file(struct file *file) {}