io_uring: pass required context in as flags
We have a number of bits that decide what context to inherit. Set up
io-wq flags for these instead. This is in preparation for always having
the various members set, but not always needing them for all requests.
No intended functional changes in this patch.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/fs/io-wq.c b/fs/io-wq.c
index 149fd2f..e636898 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -448,6 +448,8 @@ static inline void io_wq_switch_blkcg(struct io_worker *worker,
struct io_wq_work *work)
{
#ifdef CONFIG_BLK_CGROUP
+ if (!(work->flags & IO_WQ_WORK_BLKCG))
+ return;
if (work->blkcg_css != worker->blkcg_css) {
kthread_associate_blkcg(work->blkcg_css);
worker->blkcg_css = work->blkcg_css;
@@ -470,17 +472,17 @@ static void io_wq_switch_creds(struct io_worker *worker,
static void io_impersonate_work(struct io_worker *worker,
struct io_wq_work *work)
{
- if (work->files && current->files != work->files) {
+ if ((work->flags & IO_WQ_WORK_FILES) && current->files != work->files) {
task_lock(current);
current->files = work->files;
current->nsproxy = work->nsproxy;
task_unlock(current);
}
- if (work->fs && current->fs != work->fs)
+ if ((work->flags & IO_WQ_WORK_FS) && current->fs != work->fs)
current->fs = work->fs;
- if (work->mm != worker->mm)
+ if ((work->flags & IO_WQ_WORK_MM) && work->mm != worker->mm)
io_wq_switch_mm(worker, work);
- if (worker->cur_creds != work->creds)
+ if ((work->flags & IO_WQ_WORK_CREDS) && worker->cur_creds != work->creds)
io_wq_switch_creds(worker, work);
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = work->fsize;
io_wq_switch_blkcg(worker, work);
