On Wed, Dec 23, 2020 at 11:27:05AM +0800, Yejune Deng wrote:
The function io_remove_personalities() is very similar to
io_unregister_personality(),but the latter has a more reasonable
return value.
Signed-off-by: Yejune Deng <yejune.deng@xxxxxxxxx>
---
fs/io_uring.c | 25 ++++++-------------------
1 file changed, 6 insertions(+), 19 deletions(-)
The patch LGTM, maybe as an alternative you can leave
io_remove_personality() with the interface needed by idr_for_each() and
implement io_unregister_personality() calling io_remove_personality()
with the right parameters.
Just an idea, but I'm also fine with this patch, so:
Reviewed-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
diff --git a/fs/io_uring.c b/fs/io_uring.c
index b749578..000ea9a 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -8608,7 +8608,7 @@ static int io_uring_fasync(int fd, struct file *file, int on)
return fasync_helper(fd, file, on, &ctx->cq_fasync);
}
-static int io_remove_personalities(int id, void *p, void *data)
+static int io_unregister_personality(int id, void *p, void *data)
{
struct io_ring_ctx *ctx = data;
struct io_identity *iod;
@@ -8618,8 +8618,10 @@ static int io_remove_personalities(int id, void *p, void *data)
put_cred(iod->creds);
if (refcount_dec_and_test(&iod->count))
kfree(iod);
+ return 0;
}
- return 0;
+
+ return -EINVAL;
}
static void io_ring_exit_work(struct work_struct *work)
@@ -8657,7 +8659,7 @@ static void io_ring_ctx_wait_and_kill(struct io_ring_ctx *ctx)
/* if we failed setting up the ctx, we might not have any rings */
io_iopoll_try_reap_events(ctx);
- idr_for_each(&ctx->personality_idr, io_remove_personalities, ctx);
+ idr_for_each(&ctx->personality_idr, io_unregister_personality, ctx);
/*
* Do this upfront, so we won't have a grace period where the ring
@@ -9679,21 +9681,6 @@ static int io_register_personality(struct io_ring_ctx *ctx)
return ret;
}
-static int io_unregister_personality(struct io_ring_ctx *ctx, unsigned id)
-{
- struct io_identity *iod;
-
- iod = idr_remove(&ctx->personality_idr, id);
- if (iod) {
- put_cred(iod->creds);
- if (refcount_dec_and_test(&iod->count))
- kfree(iod);
- return 0;
- }
-
- return -EINVAL;
-}
-
static int io_register_restrictions(struct io_ring_ctx *ctx, void __user *arg,
unsigned int nr_args)
{
@@ -9906,7 +9893,7 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
ret = -EINVAL;
if (arg)
break;
- ret = io_unregister_personality(ctx, nr_args);
+ ret = io_unregister_personality(nr_args, NULL, ctx);
break;
case IORING_REGISTER_ENABLE_RINGS:
ret = -EINVAL;
--
1.9.1
