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| author |   Jens Axboe <axboe@kernel.dk> | 2020-01-27 16:34:48 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-01-28 17:44:20 -0700 |
| commit | cccf0ee834559ae0b327b40290e14f6a2a017177 (patch) | |
| tree | 0a16598abac51ed90547cddf6d48dd2e4e37c516 /include/uapi/linux | |
| parent | io-wq: make the io_wq ref counted (diff) | |
| download | linux-dev-cccf0ee834559ae0b327b40290e14f6a2a017177.tar.xz linux-dev-cccf0ee834559ae0b327b40290e14f6a2a017177.zip | |
io_uring/io-wq: don't use static creds/mm assignments
We currently setup the io_wq with a static set of mm and creds. Even for
a single-use io-wq per io_uring, this is suboptimal as we have may have
multiple enters of the ring. For sharing the io-wq backend, it doesn't
work at all.
Switch to passing in the creds and mm when the work item is setup. This
means that async work is no longer deferred to the io_uring mm and creds,
it is done with the current mm and creds.
Flag this behavior with IORING_FEAT_CUR_PERSONALITY, so applications know
they can rely on the current personality (mm and creds) being the same
for direct issue and async issue.
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'include/uapi/linux')
| -rw-r--r-- | include/uapi/linux/io_uring.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/io_uring.h b/include/uapi/linux/io_uring.h index 57d05cc5e271..9988e82f858b 100644 --- a/include/uapi/linux/io_uring.h +++ b/include/uapi/linux/io_uring.h @@ -195,6 +195,7 @@ struct io_uring_params { #define IORING_FEAT_NODROP (1U << 1) #define IORING_FEAT_SUBMIT_STABLE (1U << 2) #define IORING_FEAT_RW_CUR_POS (1U << 3) +#define IORING_FEAT_CUR_PERSONALITY (1U << 4) /* * io_uring_register(2) opcodes and arguments |