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| author |   Jens Axboe <axboe@kernel.dk> | 2020-02-06 21:42:51 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-02-08 13:06:58 -0700 |
| commit | 9392a27d88b9707145d713654eb26f0c29789e50 (patch) | |
| tree | e40fe1aefd634c29f41cfcc103e32f4a68c38cd3 /fs/io-wq.c | |
| parent | io_uring: retry raw bdev writes if we hit -EOPNOTSUPP (diff) | |
| download | wireguard-linux-9392a27d88b9707145d713654eb26f0c29789e50.tar.xz wireguard-linux-9392a27d88b9707145d713654eb26f0c29789e50.zip | |
io-wq: add support for inheriting ->fs
Some work items need this for relative path lookup, make it available
like the other inherited credentials/mm/etc.
Cc: stable@vger.kernel.org # 5.3+
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'fs/io-wq.c')
| -rw-r--r-- | fs/io-wq.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/io-wq.c b/fs/io-wq.c index cb60a42b9fdf..7ac4a8876a50 100644 --- a/fs/io-wq.c +++ b/fs/io-wq.c @@ -16,6 +16,7 @@ #include <linux/slab.h> #include <linux/kthread.h> #include <linux/rculist_nulls.h> +#include <linux/fs_struct.h> #include "io-wq.h" @@ -59,6 +60,7 @@ struct io_worker { const struct cred *cur_creds; const struct cred *saved_creds; struct files_struct *restore_files; + struct fs_struct *restore_fs; }; #if BITS_PER_LONG == 64 @@ -151,6 +153,9 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker) task_unlock(current); } + if (current->fs != worker->restore_fs) + current->fs = worker->restore_fs; + /* * If we have an active mm, we need to drop the wq lock before unusing * it. If we do, return true and let the caller retry the idle loop. @@ -311,6 +316,7 @@ static void io_worker_start(struct io_wqe *wqe, struct io_worker *worker) worker->flags |= (IO_WORKER_F_UP | IO_WORKER_F_RUNNING); worker->restore_files = current->files; + worker->restore_fs = current->fs; io_wqe_inc_running(wqe, worker); } @@ -481,6 +487,8 @@ next: current->files = work->files; task_unlock(current); } + if (work->fs && current->fs != work->fs) + current->fs = work->fs; if (work->mm != worker->mm) io_wq_switch_mm(worker, work); if (worker->cur_creds != work->creds) |