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

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;