kernel/linux.git/io_uring/mock_file.c, branch v6.18.21

io_uring/mock: add trivial poll handler

2025-07-02T14:10:26+00:00

Add a flag that enables polling on the mock file. For now it's trivially says that there is always data available, it'll be extended in the future. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/f16de043ec4876d65fae294fc99ade57415fba0c.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/mock: support for async read/write

2025-07-02T14:10:26+00:00

Let the user to specify a delay to read/write request. io_uring will start a timer, return -EIOCBQUEUED and complete the request asynchronously after the delay pass. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/38f9d2e143fda8522c90a724b74630e68f9bbd16.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/mock: allow to choose FMODE_NOWAIT

2025-07-02T14:10:26+00:00

Add an option to choose whether the file supports FMODE_NOWAIT, that changes the execution path io_uring request takes. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/1e532565b05a05b23589d237c24ee1a3d90c2fd9.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/mock: add sync read/write

2025-07-02T14:10:26+00:00

Add support for synchronous zero read/write for mock files. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/571f3c9fe688e918256a06a722d3db6ced9ca3d5.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/mock: add cmd using vectored regbufs

2025-07-02T14:10:26+00:00

There is a command api allowing to import vectored registered buffers, add a new mock command that uses the feature and simply copies the specified registered buffer into user space or vice versa. Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/229a113fd7de6b27dbef9567f7c0bf4475c9017d.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe

io_uring/mock: add basic infra for test mock files

2025-07-02T14:10:26+00:00

io_uring commands provide an ioctl style interface for files to implement file specific operations. io_uring provides many features and advanced api to commands, and it's getting hard to test as it requires specific files/devices. Add basic infrastucture for creating special mock files that will be implementing the cmd api and using various io_uring features we want to test. It'll also be useful to test some more obscure read/write/polling edge cases in the future. Suggested-by: chase xd Signed-off-by: Pavel Begunkov Link: https://lore.kernel.org/r/93f21b0af58c1367a2b22635d5a7d694ad0272fc.1750599274.git.asml.silence@gmail.com Signed-off-by: Jens Axboe