Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.17 084/219] io_uring: flag the fact that linked file assignment is sane | Date | Mon, 18 Apr 2022 14:10:53 +0200 |
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From: Jens Axboe <axboe@kernel.dk>
[ Upstream commit c4212f3eb89fd5654f0a6ed2ee1d13fcb86cb664 ]
Give applications a way to tell if the kernel supports sane linked files, as in files being assigned at the right time to be able to reliably do <open file direct into slot X><read file from slot X> while using IOSQE_IO_LINK to order them.
Not really a bug fix, but flag it as such so that it gets pulled in with backports of the deferred file assignment.
Fixes: 6bf9c47a3989 ("io_uring: defer file assignment") Signed-off-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Sasha Levin <sashal@kernel.org> --- fs/io_uring.c | 3 ++- include/uapi/linux/io_uring.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-)
diff --git a/fs/io_uring.c b/fs/io_uring.c index 1a9630dc5361..d13f142793f2 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -10566,7 +10566,8 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p, IORING_FEAT_CUR_PERSONALITY | IORING_FEAT_FAST_POLL | IORING_FEAT_POLL_32BITS | IORING_FEAT_SQPOLL_NONFIXED | IORING_FEAT_EXT_ARG | IORING_FEAT_NATIVE_WORKERS | - IORING_FEAT_RSRC_TAGS | IORING_FEAT_CQE_SKIP; + IORING_FEAT_RSRC_TAGS | IORING_FEAT_CQE_SKIP | + IORING_FEAT_LINKED_FILE; if (copy_to_user(params, p, sizeof(*p))) { ret = -EFAULT; diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 787f491f0d2a..1e45368ad33f 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -293,6 +293,7 @@ struct io_uring_params { #define IORING_FEAT_NATIVE_WORKERS (1U << 9) #define IORING_FEAT_RSRC_TAGS (1U << 10) #define IORING_FEAT_CQE_SKIP (1U << 11) +#define IORING_FEAT_LINKED_FILE (1U << 12) /* * io_uring_register(2) opcodes and arguments -- 2.35.1
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