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io-wq: cancel request if it's asking for files and we don't have them

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This can't currently happen, but will be possible shortly. Handle missing
files just like we do not being able to grab a needed mm, and mark the
request as needing cancelation.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-10-30 09:36:41 -06:00
parent 3cea11cd5e
commit 3dd1680d14
1 changed files with 4 additions and 0 deletions
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4
fs/io-wq.c
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@ -482,6 +482,10 @@ static void io_impersonate_work(struct io_worker *worker,
current->files = work->identity->files;
current->nsproxy = work->identity->nsproxy;
task_unlock(current);
if (!work->identity->files) {
/* failed grabbing files, ensure work gets cancelled */
work->flags |= IO_WQ_WORK_CANCEL;
}
}
if ((work->flags & IO_WQ_WORK_FS) && current->fs != work->identity->fs)
current->fs = work->identity->fs;