mirror of https://gitee.com/openkylin/linux.git
io_uring-5.10-2020-10-12
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAl+EXPEQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpiR4EAC3trm1ojXVF7y9/XRhcPpb4Pror+ZA1coO gyoy+zUuCEl9WCzzHWqXULMYMP0YzNJnJs0oLQPA1s0sx1H4uDMl/UXg0OXZisYG Y59Kca3c1DHFwj9KPQXfGmCEjc/rbDWK5TqRc2iZMz+6E5Mt71UFZHtenwgV1zD8 hTmZZkzLCu2ePfOvrPONgL5tDqPWGVyn61phoC7cSzMF66juXGYuvQGktzi/m6q+ jAxUnhKvKTlLB9wsq3s5X/20/QD56Yuba9U+YxeeNDBE8MDWQOsjz0mZCV1fn4p3 h/6762aRaWaXH7EwMtsHFUWy7arJZg/YoFYNYLv4Ksyy3y4sMABZCy3A+JyzrgQ0 hMu7vjsP+k22X1WH8nyejBfWNEmxu6dpgckKrgF0dhJcXk/acWA3XaDWZ80UwfQy isKRAP1rA0MJKHDMIwCzSQJDPvtUAkPptbNZJcUSU78o+pPoCaQ93V++LbdgGtKn iGJJqX05dVbcsDx5X7fluphjkUTC4yFr7ZgLgbOIedXajWRD8iOkO2xxCHk6SKFl iv9entvRcX9k3SHK9uffIUkRBUujMU0+HCIQFCO1qGmkCaS5nSrovZl4HoL7L/Dj +T8+v7kyJeklLXgJBaE7jk01O4HwZKjwPWMbCjvL9NKk8j7c1soYnRu5uNvi85Mu /9wn671s+w== =udgj -----END PGP SIGNATURE----- Merge tag 'io_uring-5.10-2020-10-12' of git://git.kernel.dk/linux-block Pull io_uring updates from Jens Axboe: - Add blkcg accounting for io-wq offload (Dennis) - A use-after-free fix for io-wq (Hillf) - Cancelation fixes and improvements - Use proper files_struct references for offload - Cleanup of io_uring_get_socket() since that can now go into our own header - SQPOLL fixes and cleanups, and support for sharing the thread - Improvement to how page accounting is done for registered buffers and huge pages, accounting the real pinned state - Series cleaning up the xarray code (Willy) - Various cleanups, refactoring, and improvements (Pavel) - Use raw spinlock for io-wq (Sebastian) - Add support for ring restrictions (Stefano) * tag 'io_uring-5.10-2020-10-12' of git://git.kernel.dk/linux-block: (62 commits) io_uring: keep a pointer ref_node in file_data io_uring: refactor *files_register()'s error paths io_uring: clean file_data access in files_register io_uring: don't delay io_init_req() error check io_uring: clean leftovers after splitting issue io_uring: remove timeout.list after hrtimer cancel io_uring: use a separate struct for timeout_remove io_uring: improve submit_state.ios_left accounting io_uring: simplify io_file_get() io_uring: kill extra check in fixed io_file_get() io_uring: clean up ->files grabbing io_uring: don't io_prep_async_work() linked reqs io_uring: Convert advanced XArray uses to the normal API io_uring: Fix XArray usage in io_uring_add_task_file io_uring: Fix use of XArray in __io_uring_files_cancel io_uring: fix break condition for __io_uring_register() waiting io_uring: no need to call xa_destroy() on empty xarray io_uring: batch account ->req_issue and task struct references io_uring: kill callback_head argument for io_req_task_work_add() io_uring: move req preps out of io_issue_sqe() ...
This commit is contained in:
Linus Torvalds
commit
6ad4bf6ea1
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@ -62,6 +62,7 @@
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#include <linux/oom.h>
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#include <linux/compat.h>
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#include <linux/vmalloc.h>
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#include <linux/io_uring.h>
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#include <linux/uaccess.h>
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#include <asm/mmu_context.h>
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@ -1895,6 +1896,11 @@ static int bprm_execve(struct linux_binprm *bprm,
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struct files_struct *displaced;
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int retval;
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/*
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* Cancel any io_uring activity across execve
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*/
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io_uring_task_cancel();
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retval = unshare_files(&displaced);
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if (retval)
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return retval;
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@ -21,6 +21,7 @@
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#include <linux/rcupdate.h>
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#include <linux/close_range.h>
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#include <net/sock.h>
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#include <linux/io_uring.h>
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unsigned int sysctl_nr_open __read_mostly = 1024*1024;
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unsigned int sysctl_nr_open_min = BITS_PER_LONG;
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@ -452,6 +453,7 @@ void exit_files(struct task_struct *tsk)
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struct files_struct * files = tsk->files;
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if (files) {
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io_uring_files_cancel(files);
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task_lock(tsk);
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tsk->files = NULL;
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task_unlock(tsk);
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200
fs/io-wq.c
200
fs/io-wq.c
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@ -17,6 +17,7 @@
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#include <linux/rculist_nulls.h>
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#include <linux/fs_struct.h>
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#include <linux/task_work.h>
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#include <linux/blk-cgroup.h>
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#include "io-wq.h"
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@ -26,9 +27,8 @@ enum {
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IO_WORKER_F_UP = 1, /* up and active */
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IO_WORKER_F_RUNNING = 2, /* account as running */
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IO_WORKER_F_FREE = 4, /* worker on free list */
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IO_WORKER_F_EXITING = 8, /* worker exiting */
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IO_WORKER_F_FIXED = 16, /* static idle worker */
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IO_WORKER_F_BOUND = 32, /* is doing bounded work */
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IO_WORKER_F_FIXED = 8, /* static idle worker */
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IO_WORKER_F_BOUND = 16, /* is doing bounded work */
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};
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enum {
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@ -57,9 +57,13 @@ struct io_worker {
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struct rcu_head rcu;
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struct mm_struct *mm;
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#ifdef CONFIG_BLK_CGROUP
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struct cgroup_subsys_state *blkcg_css;
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#endif
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const struct cred *cur_creds;
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const struct cred *saved_creds;
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struct files_struct *restore_files;
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struct nsproxy *restore_nsproxy;
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struct fs_struct *restore_fs;
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};
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@ -87,7 +91,7 @@ enum {
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*/
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struct io_wqe {
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struct {
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spinlock_t lock;
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raw_spinlock_t lock;
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struct io_wq_work_list work_list;
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unsigned long hash_map;
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unsigned flags;
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@ -148,11 +152,12 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker)
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if (current->files != worker->restore_files) {
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__acquire(&wqe->lock);
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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dropped_lock = true;
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task_lock(current);
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current->files = worker->restore_files;
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current->nsproxy = worker->restore_nsproxy;
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task_unlock(current);
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}
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@ -166,7 +171,7 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker)
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if (worker->mm) {
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if (!dropped_lock) {
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__acquire(&wqe->lock);
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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dropped_lock = true;
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}
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__set_current_state(TASK_RUNNING);
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@ -175,6 +180,13 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker)
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worker->mm = NULL;
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}
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#ifdef CONFIG_BLK_CGROUP
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if (worker->blkcg_css) {
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kthread_associate_blkcg(NULL);
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worker->blkcg_css = NULL;
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}
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#endif
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return dropped_lock;
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}
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@ -200,7 +212,6 @@ static void io_worker_exit(struct io_worker *worker)
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{
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struct io_wqe *wqe = worker->wqe;
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struct io_wqe_acct *acct = io_wqe_get_acct(wqe, worker);
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unsigned nr_workers;
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/*
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* If we're not at zero, someone else is holding a brief reference
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@ -220,23 +231,19 @@ static void io_worker_exit(struct io_worker *worker)
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worker->flags = 0;
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preempt_enable();
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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hlist_nulls_del_rcu(&worker->nulls_node);
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list_del_rcu(&worker->all_list);
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if (__io_worker_unuse(wqe, worker)) {
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__release(&wqe->lock);
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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}
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acct->nr_workers--;
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nr_workers = wqe->acct[IO_WQ_ACCT_BOUND].nr_workers +
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wqe->acct[IO_WQ_ACCT_UNBOUND].nr_workers;
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spin_unlock_irq(&wqe->lock);
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/* all workers gone, wq exit can proceed */
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if (!nr_workers && refcount_dec_and_test(&wqe->wq->refs))
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complete(&wqe->wq->done);
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raw_spin_unlock_irq(&wqe->lock);
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kfree_rcu(worker, rcu);
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if (refcount_dec_and_test(&wqe->wq->refs))
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complete(&wqe->wq->done);
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}
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static inline bool io_wqe_run_queue(struct io_wqe *wqe)
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@ -318,6 +325,7 @@ static void io_worker_start(struct io_wqe *wqe, struct io_worker *worker)
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worker->flags |= (IO_WORKER_F_UP | IO_WORKER_F_RUNNING);
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worker->restore_files = current->files;
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worker->restore_nsproxy = current->nsproxy;
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worker->restore_fs = current->fs;
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io_wqe_inc_running(wqe, worker);
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}
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@ -436,6 +444,17 @@ static void io_wq_switch_mm(struct io_worker *worker, struct io_wq_work *work)
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work->flags |= IO_WQ_WORK_CANCEL;
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}
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static inline void io_wq_switch_blkcg(struct io_worker *worker,
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struct io_wq_work *work)
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{
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#ifdef CONFIG_BLK_CGROUP
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if (work->blkcg_css != worker->blkcg_css) {
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kthread_associate_blkcg(work->blkcg_css);
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worker->blkcg_css = work->blkcg_css;
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}
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#endif
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}
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static void io_wq_switch_creds(struct io_worker *worker,
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struct io_wq_work *work)
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{
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@ -454,6 +473,7 @@ static void io_impersonate_work(struct io_worker *worker,
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if (work->files && current->files != work->files) {
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task_lock(current);
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current->files = work->files;
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current->nsproxy = work->nsproxy;
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task_unlock(current);
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}
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if (work->fs && current->fs != work->fs)
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@ -463,6 +483,7 @@ static void io_impersonate_work(struct io_worker *worker,
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if (worker->cur_creds != work->creds)
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io_wq_switch_creds(worker, work);
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current->signal->rlim[RLIMIT_FSIZE].rlim_cur = work->fsize;
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io_wq_switch_blkcg(worker, work);
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}
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static void io_assign_current_work(struct io_worker *worker,
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@ -504,7 +525,7 @@ static void io_worker_handle_work(struct io_worker *worker)
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else if (!wq_list_empty(&wqe->work_list))
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wqe->flags |= IO_WQE_FLAG_STALLED;
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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if (!work)
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break;
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io_assign_current_work(worker, work);
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@ -538,17 +559,17 @@ static void io_worker_handle_work(struct io_worker *worker)
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io_wqe_enqueue(wqe, linked);
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if (hash != -1U && !next_hashed) {
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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wqe->hash_map &= ~BIT_ULL(hash);
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wqe->flags &= ~IO_WQE_FLAG_STALLED;
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/* skip unnecessary unlock-lock wqe->lock */
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if (!work)
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goto get_next;
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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}
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} while (work);
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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} while (1);
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}
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@ -563,7 +584,7 @@ static int io_wqe_worker(void *data)
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while (!test_bit(IO_WQ_BIT_EXIT, &wq->state)) {
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set_current_state(TASK_INTERRUPTIBLE);
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loop:
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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if (io_wqe_run_queue(wqe)) {
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__set_current_state(TASK_RUNNING);
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io_worker_handle_work(worker);
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@ -574,7 +595,7 @@ static int io_wqe_worker(void *data)
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__release(&wqe->lock);
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goto loop;
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}
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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if (signal_pending(current))
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flush_signals(current);
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if (schedule_timeout(WORKER_IDLE_TIMEOUT))
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@ -586,11 +607,11 @@ static int io_wqe_worker(void *data)
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}
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if (test_bit(IO_WQ_BIT_EXIT, &wq->state)) {
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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if (!wq_list_empty(&wqe->work_list))
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io_worker_handle_work(worker);
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else
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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}
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io_worker_exit(worker);
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@ -630,14 +651,14 @@ void io_wq_worker_sleeping(struct task_struct *tsk)
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worker->flags &= ~IO_WORKER_F_RUNNING;
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spin_lock_irq(&wqe->lock);
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raw_spin_lock_irq(&wqe->lock);
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io_wqe_dec_running(wqe, worker);
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spin_unlock_irq(&wqe->lock);
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raw_spin_unlock_irq(&wqe->lock);
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}
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static bool create_io_worker(struct io_wq *wq, struct io_wqe *wqe, int index)
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{
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struct io_wqe_acct *acct =&wqe->acct[index];
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struct io_wqe_acct *acct = &wqe->acct[index];
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struct io_worker *worker;
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worker = kzalloc_node(sizeof(*worker), GFP_KERNEL, wqe->node);
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|
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@ -656,7 +677,7 @@ static bool create_io_worker(struct io_wq *wq, struct io_wqe *wqe, int index)
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return false;
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}
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|
||||
spin_lock_irq(&wqe->lock);
|
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raw_spin_lock_irq(&wqe->lock);
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hlist_nulls_add_head_rcu(&worker->nulls_node, &wqe->free_list);
|
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list_add_tail_rcu(&worker->all_list, &wqe->all_list);
|
||||
worker->flags |= IO_WORKER_F_FREE;
|
||||
|
|
@ -665,11 +686,12 @@ static bool create_io_worker(struct io_wq *wq, struct io_wqe *wqe, int index)
|
|||
if (!acct->nr_workers && (worker->flags & IO_WORKER_F_BOUND))
|
||||
worker->flags |= IO_WORKER_F_FIXED;
|
||||
acct->nr_workers++;
|
||||
spin_unlock_irq(&wqe->lock);
|
||||
raw_spin_unlock_irq(&wqe->lock);
|
||||
|
||||
if (index == IO_WQ_ACCT_UNBOUND)
|
||||
atomic_inc(&wq->user->processes);
|
||||
|
||||
refcount_inc(&wq->refs);
|
||||
wake_up_process(worker->task);
|
||||
return true;
|
||||
}
|
||||
|
|
@ -685,28 +707,63 @@ static inline bool io_wqe_need_worker(struct io_wqe *wqe, int index)
|
|||
return acct->nr_workers < acct->max_workers;
|
||||
}
|
||||
|
||||
static bool io_wqe_worker_send_sig(struct io_worker *worker, void *data)
|
||||
{
|
||||
send_sig(SIGINT, worker->task, 1);
|
||||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
* Iterate the passed in list and call the specific function for each
|
||||
* worker that isn't exiting
|
||||
*/
|
||||
static bool io_wq_for_each_worker(struct io_wqe *wqe,
|
||||
bool (*func)(struct io_worker *, void *),
|
||||
void *data)
|
||||
{
|
||||
struct io_worker *worker;
|
||||
bool ret = false;
|
||||
|
||||
list_for_each_entry_rcu(worker, &wqe->all_list, all_list) {
|
||||
if (io_worker_get(worker)) {
|
||||
/* no task if node is/was offline */
|
||||
if (worker->task)
|
||||
ret = func(worker, data);
|
||||
io_worker_release(worker);
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static bool io_wq_worker_wake(struct io_worker *worker, void *data)
|
||||
{
|
||||
wake_up_process(worker->task);
|
||||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
* Manager thread. Tasked with creating new workers, if we need them.
|
||||
*/
|
||||
static int io_wq_manager(void *data)
|
||||
{
|
||||
struct io_wq *wq = data;
|
||||
int workers_to_create = num_possible_nodes();
|
||||
int node;
|
||||
|
||||
/* create fixed workers */
|
||||
refcount_set(&wq->refs, workers_to_create);
|
||||
refcount_set(&wq->refs, 1);
|
||||
for_each_node(node) {
|
||||
if (!node_online(node))
|
||||
continue;
|
||||
if (!create_io_worker(wq, wq->wqes[node], IO_WQ_ACCT_BOUND))
|
||||
goto err;
|
||||
workers_to_create--;
|
||||
if (create_io_worker(wq, wq->wqes[node], IO_WQ_ACCT_BOUND))
|
||||
continue;
|
||||
set_bit(IO_WQ_BIT_ERROR, &wq->state);
|
||||
set_bit(IO_WQ_BIT_EXIT, &wq->state);
|
||||
goto out;
|
||||
}
|
||||
|
||||
while (workers_to_create--)
|
||||
refcount_dec(&wq->refs);
|
||||
|
||||
complete(&wq->done);
|
||||
|
||||
while (!kthread_should_stop()) {
|
||||
|
|
@ -720,12 +777,12 @@ static int io_wq_manager(void *data)
|
|||
if (!node_online(node))
|
||||
continue;
|
||||
|
||||
spin_lock_irq(&wqe->lock);
|
||||
raw_spin_lock_irq(&wqe->lock);
|
||||
if (io_wqe_need_worker(wqe, IO_WQ_ACCT_BOUND))
|
||||
fork_worker[IO_WQ_ACCT_BOUND] = true;
|
||||
if (io_wqe_need_worker(wqe, IO_WQ_ACCT_UNBOUND))
|
||||
fork_worker[IO_WQ_ACCT_UNBOUND] = true;
|
||||
spin_unlock_irq(&wqe->lock);
|
||||
raw_spin_unlock_irq(&wqe->lock);
|
||||
if (fork_worker[IO_WQ_ACCT_BOUND])
|
||||
create_io_worker(wq, wqe, IO_WQ_ACCT_BOUND);
|
||||
if (fork_worker[IO_WQ_ACCT_UNBOUND])
|
||||
|
|
@ -738,12 +795,18 @@ static int io_wq_manager(void *data)
|
|||
if (current->task_works)
|
||||
task_work_run();
|
||||
|
||||
return 0;
|
||||
err:
|
||||
set_bit(IO_WQ_BIT_ERROR, &wq->state);
|
||||
set_bit(IO_WQ_BIT_EXIT, &wq->state);
|
||||
if (refcount_sub_and_test(workers_to_create, &wq->refs))
|
||||
out:
|
||||
if (refcount_dec_and_test(&wq->refs)) {
|
||||
complete(&wq->done);
|
||||
return 0;
|
||||
}
|
||||
/* if ERROR is set and we get here, we have workers to wake */
|
||||
if (test_bit(IO_WQ_BIT_ERROR, &wq->state)) {
|
||||
rcu_read_lock();
|
||||
for_each_node(node)
|
||||
io_wq_for_each_worker(wq->wqes[node], io_wq_worker_wake, NULL);
|
||||
rcu_read_unlock();
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -821,10 +884,10 @@ static void io_wqe_enqueue(struct io_wqe *wqe, struct io_wq_work *work)
|
|||
}
|
||||
|
||||
work_flags = work->flags;
|
||||
spin_lock_irqsave(&wqe->lock, flags);
|
||||
raw_spin_lock_irqsave(&wqe->lock, flags);
|
||||
io_wqe_insert_work(wqe, work);
|
||||
wqe->flags &= ~IO_WQE_FLAG_STALLED;
|
||||
spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
raw_spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
|
||||
if ((work_flags & IO_WQ_WORK_CONCURRENT) ||
|
||||
!atomic_read(&acct->nr_running))
|
||||
|
|
@ -850,37 +913,6 @@ void io_wq_hash_work(struct io_wq_work *work, void *val)
|
|||
work->flags |= (IO_WQ_WORK_HASHED | (bit << IO_WQ_HASH_SHIFT));
|
||||
}
|
||||
|
||||
static bool io_wqe_worker_send_sig(struct io_worker *worker, void *data)
|
||||
{
|
||||
send_sig(SIGINT, worker->task, 1);
|
||||
return false;
|
||||
}
|
||||
|
||||
/*
|
||||
* Iterate the passed in list and call the specific function for each
|
||||
* worker that isn't exiting
|
||||
*/
|
||||
static bool io_wq_for_each_worker(struct io_wqe *wqe,
|
||||
bool (*func)(struct io_worker *, void *),
|
||||
void *data)
|
||||
{
|
||||
struct io_worker *worker;
|
||||
bool ret = false;
|
||||
|
||||
list_for_each_entry_rcu(worker, &wqe->all_list, all_list) {
|
||||
if (io_worker_get(worker)) {
|
||||
/* no task if node is/was offline */
|
||||
if (worker->task)
|
||||
ret = func(worker, data);
|
||||
io_worker_release(worker);
|
||||
if (ret)
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
void io_wq_cancel_all(struct io_wq *wq)
|
||||
{
|
||||
int node;
|
||||
|
|
@ -951,13 +983,13 @@ static void io_wqe_cancel_pending_work(struct io_wqe *wqe,
|
|||
unsigned long flags;
|
||||
|
||||
retry:
|
||||
spin_lock_irqsave(&wqe->lock, flags);
|
||||
raw_spin_lock_irqsave(&wqe->lock, flags);
|
||||
wq_list_for_each(node, prev, &wqe->work_list) {
|
||||
work = container_of(node, struct io_wq_work, list);
|
||||
if (!match->fn(work, match->data))
|
||||
continue;
|
||||
io_wqe_remove_pending(wqe, work, prev);
|
||||
spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
raw_spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
io_run_cancel(work, wqe);
|
||||
match->nr_pending++;
|
||||
if (!match->cancel_all)
|
||||
|
|
@ -966,7 +998,7 @@ static void io_wqe_cancel_pending_work(struct io_wqe *wqe,
|
|||
/* not safe to continue after unlock */
|
||||
goto retry;
|
||||
}
|
||||
spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
raw_spin_unlock_irqrestore(&wqe->lock, flags);
|
||||
}
|
||||
|
||||
static void io_wqe_cancel_running_work(struct io_wqe *wqe,
|
||||
|
|
@ -1074,7 +1106,7 @@ struct io_wq *io_wq_create(unsigned bounded, struct io_wq_data *data)
|
|||
}
|
||||
atomic_set(&wqe->acct[IO_WQ_ACCT_UNBOUND].nr_running, 0);
|
||||
wqe->wq = wq;
|
||||
spin_lock_init(&wqe->lock);
|
||||
raw_spin_lock_init(&wqe->lock);
|
||||
INIT_WQ_LIST(&wqe->work_list);
|
||||
INIT_HLIST_NULLS_HEAD(&wqe->free_list, 0);
|
||||
INIT_LIST_HEAD(&wqe->all_list);
|
||||
|
|
@ -1113,12 +1145,6 @@ bool io_wq_get(struct io_wq *wq, struct io_wq_data *data)
|
|||
return refcount_inc_not_zero(&wq->use_refs);
|
||||
}
|
||||
|
||||
static bool io_wq_worker_wake(struct io_worker *worker, void *data)
|
||||
{
|
||||
wake_up_process(worker->task);
|
||||
return false;
|
||||
}
|
||||
|
||||
static void __io_wq_destroy(struct io_wq *wq)
|
||||
{
|
||||
int node;
|
||||
|
|
|
|||
|
|
@ -87,7 +87,11 @@ struct io_wq_work {
|
|||
struct io_wq_work_node list;
|
||||
struct files_struct *files;
|
||||
struct mm_struct *mm;
|
||||
#ifdef CONFIG_BLK_CGROUP
|
||||
struct cgroup_subsys_state *blkcg_css;
|
||||
#endif
|
||||
const struct cred *creds;
|
||||
struct nsproxy *nsproxy;
|
||||
struct fs_struct *fs;
|
||||
unsigned long fsize;
|
||||
unsigned flags;
|
||||
|
|
|
|||
2195
fs/io_uring.c
2195
fs/io_uring.c
File diff suppressed because it is too large
Load Diff
|
|
@ -302,17 +302,20 @@ enum rw_hint {
|
|||
WRITE_LIFE_EXTREME = RWH_WRITE_LIFE_EXTREME,
|
||||
};
|
||||
|
||||
#define IOCB_EVENTFD (1 << 0)
|
||||
#define IOCB_APPEND (1 << 1)
|
||||
#define IOCB_DIRECT (1 << 2)
|
||||
#define IOCB_HIPRI (1 << 3)
|
||||
#define IOCB_DSYNC (1 << 4)
|
||||
#define IOCB_SYNC (1 << 5)
|
||||
#define IOCB_WRITE (1 << 6)
|
||||
#define IOCB_NOWAIT (1 << 7)
|
||||
/* Match RWF_* bits to IOCB bits */
|
||||
#define IOCB_HIPRI (__force int) RWF_HIPRI
|
||||
#define IOCB_DSYNC (__force int) RWF_DSYNC
|
||||
#define IOCB_SYNC (__force int) RWF_SYNC
|
||||
#define IOCB_NOWAIT (__force int) RWF_NOWAIT
|
||||
#define IOCB_APPEND (__force int) RWF_APPEND
|
||||
|
||||
/* non-RWF related bits - start at 16 */
|
||||
#define IOCB_EVENTFD (1 << 16)
|
||||
#define IOCB_DIRECT (1 << 17)
|
||||
#define IOCB_WRITE (1 << 18)
|
||||
/* iocb->ki_waitq is valid */
|
||||
#define IOCB_WAITQ (1 << 8)
|
||||
#define IOCB_NOIO (1 << 9)
|
||||
#define IOCB_WAITQ (1 << 19)
|
||||
#define IOCB_NOIO (1 << 20)
|
||||
|
||||
struct kiocb {
|
||||
struct file *ki_filp;
|
||||
|
|
@ -3302,6 +3305,9 @@ static inline int kiocb_set_rw_flags(struct kiocb *ki, rwf_t flags)
|
|||
{
|
||||
int kiocb_flags = 0;
|
||||
|
||||
/* make sure there's no overlap between RWF and private IOCB flags */
|
||||
BUILD_BUG_ON((__force int) RWF_SUPPORTED & IOCB_EVENTFD);
|
||||
|
||||
if (!flags)
|
||||
return 0;
|
||||
if (unlikely(flags & ~RWF_SUPPORTED))
|
||||
|
|
@ -3310,16 +3316,11 @@ static inline int kiocb_set_rw_flags(struct kiocb *ki, rwf_t flags)
|
|||
if (flags & RWF_NOWAIT) {
|
||||
if (!(ki->ki_filp->f_mode & FMODE_NOWAIT))
|
||||
return -EOPNOTSUPP;
|
||||
kiocb_flags |= IOCB_NOWAIT | IOCB_NOIO;
|
||||
kiocb_flags |= IOCB_NOIO;
|
||||
}
|
||||
if (flags & RWF_HIPRI)
|
||||
kiocb_flags |= IOCB_HIPRI;
|
||||
if (flags & RWF_DSYNC)
|
||||
kiocb_flags |= IOCB_DSYNC;
|
||||
kiocb_flags |= (__force int) (flags & RWF_SUPPORTED);
|
||||
if (flags & RWF_SYNC)
|
||||
kiocb_flags |= (IOCB_DSYNC | IOCB_SYNC);
|
||||
if (flags & RWF_APPEND)
|
||||
kiocb_flags |= IOCB_APPEND;
|
||||
kiocb_flags |= IOCB_DSYNC;
|
||||
|
||||
ki->ki_flags |= kiocb_flags;
|
||||
return 0;
|
||||
|
|
@ -3499,15 +3500,6 @@ extern int vfs_fadvise(struct file *file, loff_t offset, loff_t len,
|
|||
extern int generic_fadvise(struct file *file, loff_t offset, loff_t len,
|
||||
int advice);
|
||||
|
||||
#if defined(CONFIG_IO_URING)
|
||||
extern struct sock *io_uring_get_socket(struct file *file);
|
||||
#else
|
||||
static inline struct sock *io_uring_get_socket(struct file *file)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
|
||||
unsigned int flags);
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,58 @@
|
|||
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||||
#ifndef _LINUX_IO_URING_H
|
||||
#define _LINUX_IO_URING_H
|
||||
|
||||
#include <linux/sched.h>
|
||||
#include <linux/xarray.h>
|
||||
#include <linux/percpu-refcount.h>
|
||||
|
||||
struct io_uring_task {
|
||||
/* submission side */
|
||||
struct xarray xa;
|
||||
struct wait_queue_head wait;
|
||||
struct file *last;
|
||||
atomic_long_t req_issue;
|
||||
|
||||
/* completion side */
|
||||
bool in_idle ____cacheline_aligned_in_smp;
|
||||
atomic_long_t req_complete;
|
||||
};
|
||||
|
||||
#if defined(CONFIG_IO_URING)
|
||||
struct sock *io_uring_get_socket(struct file *file);
|
||||
void __io_uring_task_cancel(void);
|
||||
void __io_uring_files_cancel(struct files_struct *files);
|
||||
void __io_uring_free(struct task_struct *tsk);
|
||||
|
||||
static inline void io_uring_task_cancel(void)
|
||||
{
|
||||
if (current->io_uring && !xa_empty(¤t->io_uring->xa))
|
||||
__io_uring_task_cancel();
|
||||
}
|
||||
static inline void io_uring_files_cancel(struct files_struct *files)
|
||||
{
|
||||
if (current->io_uring && !xa_empty(¤t->io_uring->xa))
|
||||
__io_uring_files_cancel(files);
|
||||
}
|
||||
static inline void io_uring_free(struct task_struct *tsk)
|
||||
{
|
||||
if (tsk->io_uring)
|
||||
__io_uring_free(tsk);
|
||||
}
|
||||
#else
|
||||
static inline struct sock *io_uring_get_socket(struct file *file)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
static inline void io_uring_task_cancel(void)
|
||||
{
|
||||
}
|
||||
static inline void io_uring_files_cancel(struct files_struct *files)
|
||||
{
|
||||
}
|
||||
static inline void io_uring_free(struct task_struct *tsk)
|
||||
{
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
|
@ -63,6 +63,7 @@ struct sighand_struct;
|
|||
struct signal_struct;
|
||||
struct task_delay_info;
|
||||
struct task_group;
|
||||
struct io_uring_task;
|
||||
|
||||
/*
|
||||
* Task state bitmask. NOTE! These bits are also
|
||||
|
|
@ -935,6 +936,10 @@ struct task_struct {
|
|||
/* Open file information: */
|
||||
struct files_struct *files;
|
||||
|
||||
#ifdef CONFIG_IO_URING
|
||||
struct io_uring_task *io_uring;
|
||||
#endif
|
||||
|
||||
/* Namespaces: */
|
||||
struct nsproxy *nsproxy;
|
||||
|
||||
|
|
|
|||
|
|
@ -95,6 +95,7 @@ enum {
|
|||
#define IORING_SETUP_CQSIZE (1U << 3) /* app defines CQ size */
|
||||
#define IORING_SETUP_CLAMP (1U << 4) /* clamp SQ/CQ ring sizes */
|
||||
#define IORING_SETUP_ATTACH_WQ (1U << 5) /* attach to existing wq */
|
||||
#define IORING_SETUP_R_DISABLED (1U << 6) /* start with ring disabled */
|
||||
|
||||
enum {
|
||||
IORING_OP_NOP,
|
||||
|
|
@ -224,6 +225,7 @@ struct io_cqring_offsets {
|
|||
*/
|
||||
#define IORING_ENTER_GETEVENTS (1U << 0)
|
||||
#define IORING_ENTER_SQ_WAKEUP (1U << 1)
|
||||
#define IORING_ENTER_SQ_WAIT (1U << 2)
|
||||
|
||||
/*
|
||||
* Passed in for io_uring_setup(2). Copied back with updated info on success
|
||||
|
|
@ -255,17 +257,24 @@ struct io_uring_params {
|
|||
/*
|
||||
* io_uring_register(2) opcodes and arguments
|
||||
*/
|
||||
#define IORING_REGISTER_BUFFERS 0
|
||||
#define IORING_UNREGISTER_BUFFERS 1
|
||||
#define IORING_REGISTER_FILES 2
|
||||
#define IORING_UNREGISTER_FILES 3
|
||||
#define IORING_REGISTER_EVENTFD 4
|
||||
#define IORING_UNREGISTER_EVENTFD 5
|
||||
#define IORING_REGISTER_FILES_UPDATE 6
|
||||
#define IORING_REGISTER_EVENTFD_ASYNC 7
|
||||
#define IORING_REGISTER_PROBE 8
|
||||
#define IORING_REGISTER_PERSONALITY 9
|
||||
#define IORING_UNREGISTER_PERSONALITY 10
|
||||
enum {
|
||||
IORING_REGISTER_BUFFERS = 0,
|
||||
IORING_UNREGISTER_BUFFERS = 1,
|
||||
IORING_REGISTER_FILES = 2,
|
||||
IORING_UNREGISTER_FILES = 3,
|
||||
IORING_REGISTER_EVENTFD = 4,
|
||||
IORING_UNREGISTER_EVENTFD = 5,
|
||||
IORING_REGISTER_FILES_UPDATE = 6,
|
||||
IORING_REGISTER_EVENTFD_ASYNC = 7,
|
||||
IORING_REGISTER_PROBE = 8,
|
||||
IORING_REGISTER_PERSONALITY = 9,
|
||||
IORING_UNREGISTER_PERSONALITY = 10,
|
||||
IORING_REGISTER_RESTRICTIONS = 11,
|
||||
IORING_REGISTER_ENABLE_RINGS = 12,
|
||||
|
||||
/* this goes last */
|
||||
IORING_REGISTER_LAST
|
||||
};
|
||||
|
||||
struct io_uring_files_update {
|
||||
__u32 offset;
|
||||
|
|
@ -290,4 +299,34 @@ struct io_uring_probe {
|
|||
struct io_uring_probe_op ops[0];
|
||||
};
|
||||
|
||||
struct io_uring_restriction {
|
||||
__u16 opcode;
|
||||
union {
|
||||
__u8 register_op; /* IORING_RESTRICTION_REGISTER_OP */
|
||||
__u8 sqe_op; /* IORING_RESTRICTION_SQE_OP */
|
||||
__u8 sqe_flags; /* IORING_RESTRICTION_SQE_FLAGS_* */
|
||||
};
|
||||
__u8 resv;
|
||||
__u32 resv2[3];
|
||||
};
|
||||
|
||||
/*
|
||||
* io_uring_restriction->opcode values
|
||||
*/
|
||||
enum {
|
||||
/* Allow an io_uring_register(2) opcode */
|
||||
IORING_RESTRICTION_REGISTER_OP = 0,
|
||||
|
||||
/* Allow an sqe opcode */
|
||||
IORING_RESTRICTION_SQE_OP = 1,
|
||||
|
||||
/* Allow sqe flags */
|
||||
IORING_RESTRICTION_SQE_FLAGS_ALLOWED = 2,
|
||||
|
||||
/* Require sqe flags (these flags must be set on each submission) */
|
||||
IORING_RESTRICTION_SQE_FLAGS_REQUIRED = 3,
|
||||
|
||||
IORING_RESTRICTION_LAST
|
||||
};
|
||||
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -114,6 +114,9 @@ struct task_struct init_task
|
|||
.thread = INIT_THREAD,
|
||||
.fs = &init_fs,
|
||||
.files = &init_files,
|
||||
#ifdef CONFIG_IO_URING
|
||||
.io_uring = NULL,
|
||||
#endif
|
||||
.signal = &init_signals,
|
||||
.sighand = &init_sighand,
|
||||
.nsproxy = &init_nsproxy,
|
||||
|
|
|
|||
|
|
@ -95,6 +95,7 @@
|
|||
#include <linux/stackleak.h>
|
||||
#include <linux/kasan.h>
|
||||
#include <linux/scs.h>
|
||||
#include <linux/io_uring.h>
|
||||
|
||||
#include <asm/pgalloc.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
|
@ -728,6 +729,7 @@ void __put_task_struct(struct task_struct *tsk)
|
|||
WARN_ON(refcount_read(&tsk->usage));
|
||||
WARN_ON(tsk == current);
|
||||
|
||||
io_uring_free(tsk);
|
||||
cgroup_free(tsk);
|
||||
task_numa_free(tsk, true);
|
||||
security_task_free(tsk);
|
||||
|
|
@ -1983,6 +1985,10 @@ static __latent_entropy struct task_struct *copy_process(
|
|||
p->vtime.state = VTIME_INACTIVE;
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_IO_URING
|
||||
p->io_uring = NULL;
|
||||
#endif
|
||||
|
||||
#if defined(SPLIT_RSS_COUNTING)
|
||||
memset(&p->rss_stat, 0, sizeof(p->rss_stat));
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -8,6 +8,7 @@
|
|||
#include <net/af_unix.h>
|
||||
#include <net/scm.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/io_uring.h>
|
||||
|
||||
#include "scm.h"
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue