From: Stefan Metzmacher <[email protected]>
To: [email protected], [email protected]
Cc: Stefan Metzmacher <[email protected]>
Subject: [PATCH 3/3] io_uring: add missing BUILD_BUG_ON() checks for new io_uring_sqe fields
Date: Thu, 11 Aug 2022 09:11:16 +0200 [thread overview]
Message-ID: <ffcaf8dc4778db4af673822df60dbda6efdd3065.1660201408.git.metze@samba.org> (raw)
In-Reply-To: <[email protected]>
Signed-off-by: Stefan Metzmacher <[email protected]>
---
io_uring/io_uring.c | 19 ++++++++++++++++---
io_uring/uring_cmd.c | 3 +++
2 files changed, 19 insertions(+), 3 deletions(-)
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index b54218da075c..ebfdb2212ec2 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -3885,13 +3885,15 @@ SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode,
static int __init io_uring_init(void)
{
-#define __BUILD_BUG_VERIFY_ELEMENT(stype, eoffset, etype, ename) do { \
+#define __BUILD_BUG_VERIFY_OFFSET_SIZE(stype, eoffset, esize, ename) do { \
BUILD_BUG_ON(offsetof(stype, ename) != eoffset); \
- BUILD_BUG_ON(sizeof(etype) != sizeof_field(stype, ename)); \
+ BUILD_BUG_ON(sizeof_field(stype, ename) != esize); \
} while (0)
#define BUILD_BUG_SQE_ELEM(eoffset, etype, ename) \
- __BUILD_BUG_VERIFY_ELEMENT(struct io_uring_sqe, eoffset, etype, ename)
+ __BUILD_BUG_VERIFY_OFFSET_SIZE(struct io_uring_sqe, eoffset, sizeof(etype), ename)
+#define BUILD_BUG_SQE_ELEM_SIZE(eoffset, esize, ename) \
+ __BUILD_BUG_VERIFY_OFFSET_SIZE(struct io_uring_sqe, eoffset, esize, ename)
BUILD_BUG_ON(sizeof(struct io_uring_sqe) != 64);
BUILD_BUG_SQE_ELEM(0, __u8, opcode);
BUILD_BUG_SQE_ELEM(1, __u8, flags);
@@ -3899,6 +3901,8 @@ static int __init io_uring_init(void)
BUILD_BUG_SQE_ELEM(4, __s32, fd);
BUILD_BUG_SQE_ELEM(8, __u64, off);
BUILD_BUG_SQE_ELEM(8, __u64, addr2);
+ BUILD_BUG_SQE_ELEM(8, __u32, cmd_op);
+ BUILD_BUG_SQE_ELEM(12, __u32, __pad1);
BUILD_BUG_SQE_ELEM(16, __u64, addr);
BUILD_BUG_SQE_ELEM(16, __u64, splice_off_in);
BUILD_BUG_SQE_ELEM(24, __u32, len);
@@ -3917,13 +3921,22 @@ static int __init io_uring_init(void)
BUILD_BUG_SQE_ELEM(28, __u32, statx_flags);
BUILD_BUG_SQE_ELEM(28, __u32, fadvise_advice);
BUILD_BUG_SQE_ELEM(28, __u32, splice_flags);
+ BUILD_BUG_SQE_ELEM(28, __u32, rename_flags);
+ BUILD_BUG_SQE_ELEM(28, __u32, unlink_flags);
+ BUILD_BUG_SQE_ELEM(28, __u32, hardlink_flags);
+ BUILD_BUG_SQE_ELEM(28, __u32, xattr_flags);
+ BUILD_BUG_SQE_ELEM(28, __u32, msg_ring_flags);
BUILD_BUG_SQE_ELEM(32, __u64, user_data);
BUILD_BUG_SQE_ELEM(40, __u16, buf_index);
BUILD_BUG_SQE_ELEM(40, __u16, buf_group);
BUILD_BUG_SQE_ELEM(42, __u16, personality);
BUILD_BUG_SQE_ELEM(44, __s32, splice_fd_in);
BUILD_BUG_SQE_ELEM(44, __u32, file_index);
+ BUILD_BUG_SQE_ELEM(44, __u16, notification_idx);
+ BUILD_BUG_SQE_ELEM(46, __u16, addr_len);
BUILD_BUG_SQE_ELEM(48, __u64, addr3);
+ BUILD_BUG_SQE_ELEM_SIZE(48, 0, cmd);
+ BUILD_BUG_SQE_ELEM(56, __u64, __pad2);
BUILD_BUG_ON(sizeof(struct io_uring_files_update) !=
sizeof(struct io_uring_rsrc_update));
diff --git a/io_uring/uring_cmd.c b/io_uring/uring_cmd.c
index 219e9ebbb44a..03f5f69a4003 100644
--- a/io_uring/uring_cmd.c
+++ b/io_uring/uring_cmd.c
@@ -58,6 +58,9 @@ int io_uring_cmd_prep_async(struct io_kiocb *req)
struct io_uring_cmd *ioucmd = io_kiocb_to_cmd(req, struct io_uring_cmd);
size_t cmd_size;
+ BUILD_BUG_ON(uring_cmd_pdu_size(0) != 16);
+ BUILD_BUG_ON(uring_cmd_pdu_size(1) != 80);
+
cmd_size = uring_cmd_pdu_size(req->ctx->flags & IORING_SETUP_SQE128);
memcpy(req->async_data, ioucmd->cmd, cmd_size);
--
2.34.1
next prev parent reply other threads:[~2022-08-11 7:12 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-11 7:11 [PATCH 0/3] typesafety improvements on io_uring-6.0 Stefan Metzmacher
2022-08-11 7:11 ` [PATCH 1/3] io_uring: consistently make use of io_notif_to_data() Stefan Metzmacher
2022-08-11 7:11 ` [PATCH 2/3] io_uring: make io_kiocb_to_cmd() typesafe Stefan Metzmacher
2022-08-11 7:11 ` Stefan Metzmacher [this message]
2022-08-11 15:38 ` [PATCH 0/3] typesafety improvements on io_uring-6.0 Jens Axboe
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