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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-06-25 13:55:38 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-25 03:39:16 +0300 |
| commit | 6e73dffbb93cb8797cd4e42e98d837edf0f1a967 (patch) | |
| tree | a1ea7810d2221f23c3bc0f673e6cc6a23262b5c7 /include/uapi/linux/io_uring.h | |
| parent | e6130eba8a848a7a6ba6c534bd8f6d60749ae1a9 (diff) | |
| download | linux-6e73dffbb93cb8797cd4e42e98d837edf0f1a967.tar.xz | |
io_uring: let to set a range for file slot allocation
From recently io_uring provides an option to allocate a file index for
operation registering fixed files. However, it's utterly unusable with
mixed approaches when for a part of files the userspace knows better
where to place it, as it may race and users don't have any sane way to
pick a slot and hoping it will not be taken.
Let the userspace to register a range of fixed file slots in which the
auto-allocation happens. The use case is splittting the fixed table in
two parts, where on of them is used for auto-allocation and another for
slot-specified operations.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/66ab0394e436f38437cf7c44676e1920d09687ad.1656154403.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux/io_uring.h')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index f378eabbff21..cf95354198a3 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -449,6 +449,9 @@ enum { /* sync cancelation API */ IORING_REGISTER_SYNC_CANCEL = 24, + /* register a range of fixed file slots for automatic slot allocation */ + IORING_REGISTER_FILE_ALLOC_RANGE = 25, + /* this goes last */ IORING_REGISTER_LAST }; @@ -595,4 +598,14 @@ struct io_uring_sync_cancel_reg { __u64 pad[4]; }; +/* + * Argument for IORING_REGISTER_FILE_ALLOC_RANGE + * The range is specified as [off, off + len) + */ +struct io_uring_file_index_range { + __u32 off; + __u32 len; + __u64 resv; +}; + #endif |