This patch adds support for skipping a file descriptor when using IORING_REGISTER_FILES_UPDATE. __io_sqe_files_update will skip fds set to IORING_REGISTER_FILES_SKIP. IORING_REGISTER_FILES_SKIP is inturn added as a #define in io_uring.h Signed-off-by: noah <goldstein.w.n@xxxxxxxxx> --- Supporting documentation and tests in liburing can be added in PR284 (https://github.com/axboe/liburing/pull/284) if this patch is applied. fs/io_uring.c | 3 +++ include/uapi/linux/io_uring.h | 7 +++++++ 2 files changed, 10 insertions(+) diff --git a/fs/io_uring.c b/fs/io_uring.c index 2c307dea162b..03748faa5295 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -8039,6 +8039,9 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx, err = -EFAULT; break; } + if (fd == IORING_REGISTER_FILES_SKIP) + continue; + i = array_index_nospec(up->offset + done, ctx->nr_user_files); table = &ctx->file_data->table[i >> IORING_FILE_TABLE_SHIFT]; index = i & IORING_FILE_TABLE_MASK; diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index f9f106c54d90..e8b481040fb3 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -298,6 +298,13 @@ struct io_uring_rsrc_update { __aligned_u64 data; }; +/* + * fd value in *((__s32 *)io_uring_rsrc_update->data) + */ + +/* Skip updating fd indexes set to this value */ +#define IORING_REGISTER_FILES_SKIP (-2) + #define IO_URING_OP_SUPPORTED (1U << 0) struct io_uring_probe_op { -- 2.29.2
