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authorJens Axboe <axboe@kernel.dk>2023-06-23 10:36:43 -0600
committerJens Axboe <axboe@kernel.dk>2023-07-17 10:05:48 -0600
commitd7b8b079a8f6bc007d06d9ee468659dae6053e13 (patch)
tree7d88ae7a599105768622657c396ca7ccb6d5ace6 /io_uring
parent8165b566049b14152873011ea540eb22eae5111d (diff)
io_uring/cancel: support opcode based lookup and cancelation
Add IORING_ASYNC_CANCEL_OP flag for cancelation, which allows the application to target cancelation based on the opcode of the original request. Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
-rw-r--r--io_uring/cancel.c17
-rw-r--r--io_uring/cancel.h2
-rw-r--r--io_uring/poll.c3
3 files changed, 17 insertions, 5 deletions
diff --git a/io_uring/cancel.c b/io_uring/cancel.c
index 20612e93a354..d91116b032eb 100644
--- a/io_uring/cancel.c
+++ b/io_uring/cancel.c
@@ -22,11 +22,12 @@ struct io_cancel {
u64 addr;
u32 flags;
s32 fd;
+ u8 opcode;
};
#define CANCEL_FLAGS (IORING_ASYNC_CANCEL_ALL | IORING_ASYNC_CANCEL_FD | \
IORING_ASYNC_CANCEL_ANY | IORING_ASYNC_CANCEL_FD_FIXED | \
- IORING_ASYNC_CANCEL_USERDATA)
+ IORING_ASYNC_CANCEL_USERDATA | IORING_ASYNC_CANCEL_OP)
/*
* Returns true if the request matches the criteria outlined by 'cd'.
@@ -38,7 +39,7 @@ bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd)
if (req->ctx != cd->ctx)
return false;
- if (!(cd->flags & (IORING_ASYNC_CANCEL_FD)))
+ if (!(cd->flags & (IORING_ASYNC_CANCEL_FD | IORING_ASYNC_CANCEL_OP)))
match_user_data = true;
if (cd->flags & IORING_ASYNC_CANCEL_ANY)
@@ -47,6 +48,10 @@ bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd)
if (req->file != cd->file)
return false;
}
+ if (cd->flags & IORING_ASYNC_CANCEL_OP) {
+ if (req->opcode != cd->opcode)
+ return false;
+ }
if (match_user_data && req->cqe.user_data != cd->data)
return false;
if (cd->flags & IORING_ASYNC_CANCEL_ALL) {
@@ -127,7 +132,7 @@ int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
if (unlikely(req->flags & REQ_F_BUFFER_SELECT))
return -EINVAL;
- if (sqe->off || sqe->len || sqe->splice_fd_in)
+ if (sqe->off || sqe->splice_fd_in)
return -EINVAL;
cancel->addr = READ_ONCE(sqe->addr);
@@ -139,6 +144,11 @@ int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
return -EINVAL;
cancel->fd = READ_ONCE(sqe->fd);
}
+ if (cancel->flags & IORING_ASYNC_CANCEL_OP) {
+ if (cancel->flags & IORING_ASYNC_CANCEL_ANY)
+ return -EINVAL;
+ cancel->opcode = READ_ONCE(sqe->len);
+ }
return 0;
}
@@ -185,6 +195,7 @@ int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags)
.ctx = req->ctx,
.data = cancel->addr,
.flags = cancel->flags,
+ .opcode = cancel->opcode,
.seq = atomic_inc_return(&req->ctx->cancel_seq),
};
struct io_uring_task *tctx = req->task->io_uring;
diff --git a/io_uring/cancel.h b/io_uring/cancel.h
index 496ce4dac78e..fc98622e6166 100644
--- a/io_uring/cancel.h
+++ b/io_uring/cancel.h
@@ -8,11 +8,11 @@ struct io_cancel_data {
u64 data;
struct file *file;
};
+ u8 opcode;
u32 flags;
int seq;
};
-
int io_async_cancel_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
int io_async_cancel(struct io_kiocb *req, unsigned int issue_flags);
diff --git a/io_uring/poll.c b/io_uring/poll.c
index dc1219f606e5..65ec363f6377 100644
--- a/io_uring/poll.c
+++ b/io_uring/poll.c
@@ -851,7 +851,8 @@ static int __io_poll_cancel(struct io_ring_ctx *ctx, struct io_cancel_data *cd,
struct io_hash_bucket *bucket;
struct io_kiocb *req;
- if (cd->flags & (IORING_ASYNC_CANCEL_FD|IORING_ASYNC_CANCEL_ANY))
+ if (cd->flags & (IORING_ASYNC_CANCEL_FD | IORING_ASYNC_CANCEL_OP |
+ IORING_ASYNC_CANCEL_ANY))
req = io_poll_file_find(ctx, cd, table, &bucket);
else
req = io_poll_find(ctx, false, cd, table, &bucket);