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io_uring: add missing BUILD_BUG_ON() checks for new io_uring_sqe fields 

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Link: https://lore.kernel.org/r/ffcaf8dc4778db4af673822df60dbda6efdd3065.1660201408.git.metze@samba.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Stefan Metzmacher 2022-08-11 09:11:16 +02:00 committed by Jens Axboe
parent f2ccb5aed7
commit 9c71d39aa0
2 changed files with 19 additions and 3 deletions
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19
io_uring/io_uring.c
View File

@ -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));

3
io_uring/uring_cmd.c
View File

@ -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);