diff options
| author | Jens Axboe | 2022-05-09 09:29:14 -0600 |
|---|---|---|
| committer | Jens Axboe | 2022-05-13 06:28:50 -0600 |
| commit | a8da73a32b6e9271a613e5a0e90a8c35f40abeb8 (patch) | |
| tree | e42e5f63b825f72c1597f46979937319608529cf /include/uapi | |
| parent | 09893e15f1e9910711c152cd126ccfa85581ba83 (diff) | |
io_uring: add flag for allocating a fully sparse direct descriptor space
Currently to setup a fully sparse descriptor space upfront, the app needs
to alloate an array of the full size and memset it to -1 and then pass
that in. Make this a bit easier by allowing a flag that simply does
this internally rather than needing to copy each slot separately.
This works with IORING_REGISTER_FILES2 as the flag is set in struct
io_uring_rsrc_register, and is only allow when the type is
IORING_RSRC_FILE as this doesn't make sense for registered buffers.
Reviewed-by: Hao Xu <howeyxu@tencent.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index b7f02a55032a..36ec43dc7bf9 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -396,9 +396,15 @@ struct io_uring_files_update { __aligned_u64 /* __s32 * */ fds; }; +/* + * Register a fully sparse file space, rather than pass in an array of all + * -1 file descriptors. + */ +#define IORING_RSRC_REGISTER_SPARSE (1U << 0) + struct io_uring_rsrc_register { __u32 nr; - __u32 resv; + __u32 flags; __u64 resv2; __aligned_u64 data; __aligned_u64 tags; |