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io_uring: move creds from io-wq work to io_kiocb 

io-wq now doesn't have anything to do with creds now, so move ->creds
from struct io_wq_work into request (aka struct io_kiocb).

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/8520c72ab8b8f4b96db12a228a2ab4c094ae64e1.1623949695.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Pavel Begunkov 2021-06-17 18:14:01 +01:00 committed by Jens Axboe
parent 2a2758f26d
commit c10d1f986b
2 changed files with 13 additions and 12 deletions
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1
fs/io-wq.h
View File

@ -87,7 +87,6 @@ static inline void wq_list_del(struct io_wq_work_list *list,
struct io_wq_work {
struct io_wq_work_node list;
const struct cred *creds;
unsigned flags;
};

24
fs/io_uring.c
View File

@ -851,6 +851,8 @@ struct io_kiocb {
struct hlist_node hash_node;
struct async_poll *apoll;
struct io_wq_work work;
const struct cred *creds;
/* store used ubuf, so we can prevent reloading */
struct io_mapped_ubuf *imu;
};
@ -1234,8 +1236,8 @@ static void io_prep_async_work(struct io_kiocb *req)
const struct io_op_def *def = &io_op_defs[req->opcode];
struct io_ring_ctx *ctx = req->ctx;
if (!req->work.creds)
req->work.creds = get_current_cred();
if (!req->creds)
req->creds = get_current_cred();
req->work.list.next = NULL;
req->work.flags = 0;
@ -1745,9 +1747,9 @@ static void io_dismantle_req(struct io_kiocb *req)
percpu_ref_put(req->fixed_rsrc_refs);
if (req->async_data)
kfree(req->async_data);
if (req->work.creds) {
put_cred(req->work.creds);
req->work.creds = NULL;
if (req->creds) {
put_cred(req->creds);
req->creds = NULL;
}
}
@ -6139,8 +6141,8 @@ static int io_issue_sqe(struct io_kiocb *req, unsigned int issue_flags)
const struct cred *creds = NULL;
int ret;
if (req->work.creds && req->work.creds != current_cred())
creds = override_creds(req->work.creds);
if (req->creds && req->creds != current_cred())
creds = override_creds(req->creds);
switch (req->opcode) {
case IORING_OP_NOP:
@ -6532,7 +6534,7 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req,
atomic_set(&req->refs, 2);
req->task = current;
req->result = 0;
req->work.creds = NULL;
req->creds = NULL;
/* enforce forwards compatibility on users */
if (unlikely(sqe_flags & ~SQE_VALID_FLAGS))
@ -6550,10 +6552,10 @@ static int io_init_req(struct io_ring_ctx *ctx, struct io_kiocb *req,
personality = READ_ONCE(sqe->personality);
if (personality) {
req->work.creds = xa_load(&ctx->personalities, personality);
if (!req->work.creds)
req->creds = xa_load(&ctx->personalities, personality);
if (!req->creds)
return -EINVAL;
get_cred(req->work.creds);
get_cred(req->creds);
}
state = &ctx->submit_state;