io_uring: io_uring: add support for async work inheriting files

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This is in preparation for adding opcodes that need to add new files
in a process file table, system calls like open(2) or accept4(2).

If an opcode needs this, it must set IO_WQ_WORK_NEEDS_FILES in the work
item. If work that needs to get punted to async context have this
set, the async worker will assume the original task file table before
executing the work.

Note that opcodes that need access to the current files of an
application cannot be done through IORING_SETUP_SQPOLL.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2019-10-24 12:39:47 -06:00

parent 561fb04a6a

commit fcb323cc53

3 changed files with 141 additions and 8 deletions

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30

fs/io-wq.c

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3

fs/io-wq.h

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116

fs/io_uring.c

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