Merge tag 'io_uring-5.8-2020-06-11' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"A few late stragglers in here. In particular:
- Validate full range for provided buffers (Bijan)
- Fix bad use of kfree() in buffer registration failure (Denis)
- Don't allow close of ring itself, it's not fully safe. Making it
fully safe would require making the system call more expensive,
which isn't worth it.
- Buffer selection fix
- Regression fix for O_NONBLOCK retry
- Make IORING_OP_ACCEPT honor O_NONBLOCK (Jiufei)
- Restrict opcode handling for SQ/IOPOLL (Pavel)
- io-wq work handling cleanups and improvements (Pavel, Xiaoguang)
- IOPOLL race fix (Xiaoguang)"
* tag 'io_uring-5.8-2020-06-11' of git://git.kernel.dk/linux-block:
io_uring: fix io_kiocb.flags modification race in IOPOLL mode
io_uring: check file O_NONBLOCK state for accept
io_uring: avoid unnecessary io_wq_work copy for fast poll feature
io_uring: avoid whole io_wq_work copy for requests completed inline
io_uring: allow O_NONBLOCK async retry
io_wq: add per-wq work handler instead of per work
io_uring: don't arm a timeout through work.func
io_uring: remove custom ->func handlers
io_uring: don't derive close state from ->func
io_uring: use kvfree() in io_sqe_buffer_register()
io_uring: validate the full range of provided buffers for access
io_uring: re-set iov base/len for buffer select retry
io_uring: move send/recv IOPOLL check into prep
io_uring: deduplicate io_openat{,2}_prep()
io_uring: do build_open_how() only once
io_uring: fix {SQ,IO}POLL with unsupported opcodes
io_uring: disallow close of ring itself
diff --git a/fs/io-wq.c b/fs/io-wq.c
index a5e90ac..0b65a91 100644
--- a/fs/io-wq.c
+++ b/fs/io-wq.c
@@ -111,6 +111,7 @@
unsigned long state;
free_work_fn *free_work;
+ io_wq_work_fn *do_work;
struct task_struct *manager;
struct user_struct *user;
@@ -523,7 +524,7 @@
hash = io_get_work_hash(work);
linked = old_work = work;
- linked->func(&linked);
+ wq->do_work(&linked);
linked = (old_work == linked) ? NULL : linked;
work = next_hashed;
@@ -780,7 +781,7 @@
struct io_wq_work *old_work = work;
work->flags |= IO_WQ_WORK_CANCEL;
- work->func(&work);
+ wq->do_work(&work);
work = (work == old_work) ? NULL : work;
wq->free_work(old_work);
} while (work);
@@ -1018,7 +1019,7 @@
int ret = -ENOMEM, node;
struct io_wq *wq;
- if (WARN_ON_ONCE(!data->free_work))
+ if (WARN_ON_ONCE(!data->free_work || !data->do_work))
return ERR_PTR(-EINVAL);
wq = kzalloc(sizeof(*wq), GFP_KERNEL);
@@ -1032,6 +1033,7 @@
}
wq->free_work = data->free_work;
+ wq->do_work = data->do_work;
/* caller must already hold a reference to this */
wq->user = data->user;
@@ -1088,7 +1090,7 @@
bool io_wq_get(struct io_wq *wq, struct io_wq_data *data)
{
- if (data->free_work != wq->free_work)
+ if (data->free_work != wq->free_work || data->do_work != wq->do_work)
return false;
return refcount_inc_not_zero(&wq->use_refs);
diff --git a/fs/io-wq.h b/fs/io-wq.h
index 5ba12de..8e138fa 100644
--- a/fs/io-wq.h
+++ b/fs/io-wq.h
@@ -85,7 +85,6 @@
struct io_wq_work {
struct io_wq_work_node list;
- void (*func)(struct io_wq_work **);
struct files_struct *files;
struct mm_struct *mm;
const struct cred *creds;
@@ -94,11 +93,6 @@
pid_t task_pid;
};
-#define INIT_IO_WORK(work, _func) \
- do { \
- *(work) = (struct io_wq_work){ .func = _func }; \
- } while (0) \
-
static inline struct io_wq_work *wq_next_work(struct io_wq_work *work)
{
if (!work->list.next)
@@ -108,10 +102,12 @@
}
typedef void (free_work_fn)(struct io_wq_work *);
+typedef void (io_wq_work_fn)(struct io_wq_work **);
struct io_wq_data {
struct user_struct *user;
+ io_wq_work_fn *do_work;
free_work_fn *free_work;
};
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 26f7bc9..155f3d8 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -528,7 +528,6 @@
REQ_F_INFLIGHT_BIT,
REQ_F_CUR_POS_BIT,
REQ_F_NOWAIT_BIT,
- REQ_F_IOPOLL_COMPLETED_BIT,
REQ_F_LINK_TIMEOUT_BIT,
REQ_F_TIMEOUT_BIT,
REQ_F_ISREG_BIT,
@@ -540,6 +539,8 @@
REQ_F_POLLED_BIT,
REQ_F_BUFFER_SELECTED_BIT,
REQ_F_NO_FILE_TABLE_BIT,
+ REQ_F_QUEUE_TIMEOUT_BIT,
+ REQ_F_WORK_INITIALIZED_BIT,
/* not a real bit, just to check we're not overflowing the space */
__REQ_F_LAST_BIT,
@@ -571,8 +572,6 @@
REQ_F_CUR_POS = BIT(REQ_F_CUR_POS_BIT),
/* must not punt to workers */
REQ_F_NOWAIT = BIT(REQ_F_NOWAIT_BIT),
- /* polled IO has completed */
- REQ_F_IOPOLL_COMPLETED = BIT(REQ_F_IOPOLL_COMPLETED_BIT),
/* has linked timeout */
REQ_F_LINK_TIMEOUT = BIT(REQ_F_LINK_TIMEOUT_BIT),
/* timeout request */
@@ -595,6 +594,10 @@
REQ_F_BUFFER_SELECTED = BIT(REQ_F_BUFFER_SELECTED_BIT),
/* doesn't need file table for this request */
REQ_F_NO_FILE_TABLE = BIT(REQ_F_NO_FILE_TABLE_BIT),
+ /* needs to queue linked timeout */
+ REQ_F_QUEUE_TIMEOUT = BIT(REQ_F_QUEUE_TIMEOUT_BIT),
+ /* io_wq_work is initialized */
+ REQ_F_WORK_INITIALIZED = BIT(REQ_F_WORK_INITIALIZED_BIT),
};
struct async_poll {
@@ -633,6 +636,8 @@
struct io_async_ctx *io;
int cflags;
u8 opcode;
+ /* polled IO has completed */
+ u8 iopoll_completed;
u16 buf_index;
@@ -697,6 +702,8 @@
unsigned needs_mm : 1;
/* needs req->file assigned */
unsigned needs_file : 1;
+ /* don't fail if file grab fails */
+ unsigned needs_file_no_error : 1;
/* hash wq insertion if file is a regular file */
unsigned hash_reg_file : 1;
/* unbound wq insertion if file is a non-regular file */
@@ -803,6 +810,8 @@
.needs_fs = 1,
},
[IORING_OP_CLOSE] = {
+ .needs_file = 1,
+ .needs_file_no_error = 1,
.file_table = 1,
},
[IORING_OP_FILES_UPDATE] = {
@@ -903,6 +912,19 @@
static void io_file_put_work(struct work_struct *work);
+/*
+ * Note: must call io_req_init_async() for the first time you
+ * touch any members of io_wq_work.
+ */
+static inline void io_req_init_async(struct io_kiocb *req)
+{
+ if (req->flags & REQ_F_WORK_INITIALIZED)
+ return;
+
+ memset(&req->work, 0, sizeof(req->work));
+ req->flags |= REQ_F_WORK_INITIALIZED;
+}
+
static inline bool io_async_submit(struct io_ring_ctx *ctx)
{
return ctx->flags & IORING_SETUP_SQPOLL;
@@ -1029,6 +1051,9 @@
static inline void io_req_work_drop_env(struct io_kiocb *req)
{
+ if (!(req->flags & REQ_F_WORK_INITIALIZED))
+ return;
+
if (req->work.mm) {
mmdrop(req->work.mm);
req->work.mm = NULL;
@@ -1575,16 +1600,6 @@
io_queue_async_work(nxt);
}
-static void io_link_work_cb(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
- struct io_kiocb *link;
-
- link = list_first_entry(&req->link_list, struct io_kiocb, link_list);
- io_queue_linked_timeout(link);
- io_wq_submit_work(workptr);
-}
-
static void io_wq_assign_next(struct io_wq_work **workptr, struct io_kiocb *nxt)
{
struct io_kiocb *link;
@@ -1596,7 +1611,7 @@
*workptr = &nxt->work;
link = io_prep_linked_timeout(nxt);
if (link)
- nxt->work.func = io_link_work_cb;
+ nxt->flags |= REQ_F_QUEUE_TIMEOUT;
}
/*
@@ -1781,7 +1796,7 @@
* If we find a request that requires polling, break out
* and complete those lists first, if we have entries there.
*/
- if (req->flags & REQ_F_IOPOLL_COMPLETED) {
+ if (READ_ONCE(req->iopoll_completed)) {
list_move_tail(&req->list, &done);
continue;
}
@@ -1962,7 +1977,7 @@
req_set_fail_links(req);
req->result = res;
if (res != -EAGAIN)
- req->flags |= REQ_F_IOPOLL_COMPLETED;
+ WRITE_ONCE(req->iopoll_completed, 1);
}
/*
@@ -1995,7 +2010,7 @@
* For fast devices, IO may have already completed. If it has, add
* it to the front so we find it first.
*/
- if (req->flags & REQ_F_IOPOLL_COMPLETED)
+ if (READ_ONCE(req->iopoll_completed))
list_add(&req->list, &ctx->poll_list);
else
list_add_tail(&req->list, &ctx->poll_list);
@@ -2063,6 +2078,10 @@
if (S_ISREG(mode) && file->f_op != &io_uring_fops)
return true;
+ /* any ->read/write should understand O_NONBLOCK */
+ if (file->f_flags & O_NONBLOCK)
+ return true;
+
if (!(file->f_mode & FMODE_NOWAIT))
return false;
@@ -2105,8 +2124,7 @@
kiocb->ki_ioprio = get_current_ioprio();
/* don't allow async punt if RWF_NOWAIT was requested */
- if ((kiocb->ki_flags & IOCB_NOWAIT) ||
- (req->file->f_flags & O_NONBLOCK))
+ if (kiocb->ki_flags & IOCB_NOWAIT)
req->flags |= REQ_F_NOWAIT;
if (force_nonblock)
@@ -2120,6 +2138,7 @@
kiocb->ki_flags |= IOCB_HIPRI;
kiocb->ki_complete = io_complete_rw_iopoll;
req->result = 0;
+ req->iopoll_completed = 0;
} else {
if (kiocb->ki_flags & IOCB_HIPRI)
return -EINVAL;
@@ -2358,8 +2377,14 @@
static ssize_t io_iov_buffer_select(struct io_kiocb *req, struct iovec *iov,
bool needs_lock)
{
- if (req->flags & REQ_F_BUFFER_SELECTED)
+ if (req->flags & REQ_F_BUFFER_SELECTED) {
+ struct io_buffer *kbuf;
+
+ kbuf = (struct io_buffer *) (unsigned long) req->rw.addr;
+ iov[0].iov_base = u64_to_user_ptr(kbuf->addr);
+ iov[0].iov_len = kbuf->len;
return 0;
+ }
if (!req->rw.len)
return 0;
else if (req->rw.len > 1)
@@ -2741,7 +2766,8 @@
if (ret)
goto out_free;
/* any defer here is final, must blocking retry */
- if (!file_can_poll(req->file))
+ if (!(req->flags & REQ_F_NOWAIT) &&
+ !file_can_poll(req->file))
req->flags |= REQ_F_MUST_PUNT;
return -EAGAIN;
}
@@ -2761,6 +2787,8 @@
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
sp->file_in = NULL;
sp->len = READ_ONCE(sqe->len);
@@ -2775,8 +2803,14 @@
return ret;
req->flags |= REQ_F_NEED_CLEANUP;
- if (!S_ISREG(file_inode(sp->file_in)->i_mode))
+ if (!S_ISREG(file_inode(sp->file_in)->i_mode)) {
+ /*
+ * Splice operation will be punted aync, and here need to
+ * modify io_wq_work.flags, so initialize io_wq_work firstly.
+ */
+ io_req_init_async(req);
req->work.flags |= IO_WQ_WORK_UNBOUND;
+ }
return 0;
}
@@ -2885,23 +2919,15 @@
return 0;
}
-static bool io_req_cancelled(struct io_kiocb *req)
-{
- if (req->work.flags & IO_WQ_WORK_CANCEL) {
- req_set_fail_links(req);
- io_cqring_add_event(req, -ECANCELED);
- io_put_req(req);
- return true;
- }
-
- return false;
-}
-
-static void __io_fsync(struct io_kiocb *req)
+static int io_fsync(struct io_kiocb *req, bool force_nonblock)
{
loff_t end = req->sync.off + req->sync.len;
int ret;
+ /* fsync always requires a blocking context */
+ if (force_nonblock)
+ return -EAGAIN;
+
ret = vfs_fsync_range(req->file, req->sync.off,
end > 0 ? end : LLONG_MAX,
req->sync.flags & IORING_FSYNC_DATASYNC);
@@ -2909,58 +2935,16 @@
req_set_fail_links(req);
io_cqring_add_event(req, ret);
io_put_req(req);
-}
-
-static void io_fsync_finish(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
-
- if (io_req_cancelled(req))
- return;
- __io_fsync(req);
- io_steal_work(req, workptr);
-}
-
-static int io_fsync(struct io_kiocb *req, bool force_nonblock)
-{
- /* fsync always requires a blocking context */
- if (force_nonblock) {
- req->work.func = io_fsync_finish;
- return -EAGAIN;
- }
- __io_fsync(req);
return 0;
}
-static void __io_fallocate(struct io_kiocb *req)
-{
- int ret;
-
- current->signal->rlim[RLIMIT_FSIZE].rlim_cur = req->fsize;
- ret = vfs_fallocate(req->file, req->sync.mode, req->sync.off,
- req->sync.len);
- current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
- if (ret < 0)
- req_set_fail_links(req);
- io_cqring_add_event(req, ret);
- io_put_req(req);
-}
-
-static void io_fallocate_finish(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
-
- if (io_req_cancelled(req))
- return;
- __io_fallocate(req);
- io_steal_work(req, workptr);
-}
-
static int io_fallocate_prep(struct io_kiocb *req,
const struct io_uring_sqe *sqe)
{
if (sqe->ioprio || sqe->buf_index || sqe->rw_flags)
return -EINVAL;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
req->sync.off = READ_ONCE(sqe->off);
req->sync.len = READ_ONCE(sqe->addr);
@@ -2971,66 +2955,74 @@
static int io_fallocate(struct io_kiocb *req, bool force_nonblock)
{
- /* fallocate always requiring blocking context */
- if (force_nonblock) {
- req->work.func = io_fallocate_finish;
- return -EAGAIN;
- }
+ int ret;
- __io_fallocate(req);
+ /* fallocate always requiring blocking context */
+ if (force_nonblock)
+ return -EAGAIN;
+
+ current->signal->rlim[RLIMIT_FSIZE].rlim_cur = req->fsize;
+ ret = vfs_fallocate(req->file, req->sync.mode, req->sync.off,
+ req->sync.len);
+ current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
+ if (ret < 0)
+ req_set_fail_links(req);
+ io_cqring_add_event(req, ret);
+ io_put_req(req);
return 0;
}
-static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+static int __io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
const char __user *fname;
int ret;
- if (sqe->ioprio || sqe->buf_index)
+ if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL)))
return -EINVAL;
- if (req->flags & REQ_F_FIXED_FILE)
+ if (unlikely(sqe->ioprio || sqe->buf_index))
+ return -EINVAL;
+ if (unlikely(req->flags & REQ_F_FIXED_FILE))
return -EBADF;
- if (req->flags & REQ_F_NEED_CLEANUP)
- return 0;
- req->open.dfd = READ_ONCE(sqe->fd);
- req->open.how.mode = READ_ONCE(sqe->len);
- fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
- req->open.how.flags = READ_ONCE(sqe->open_flags);
- if (force_o_largefile())
+ /* open.how should be already initialised */
+ if (!(req->open.how.flags & O_PATH) && force_o_largefile())
req->open.how.flags |= O_LARGEFILE;
+ req->open.dfd = READ_ONCE(sqe->fd);
+ fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
req->open.filename = getname(fname);
if (IS_ERR(req->open.filename)) {
ret = PTR_ERR(req->open.filename);
req->open.filename = NULL;
return ret;
}
-
req->open.nofile = rlimit(RLIMIT_NOFILE);
req->flags |= REQ_F_NEED_CLEANUP;
return 0;
}
+static int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+ u64 flags, mode;
+
+ if (req->flags & REQ_F_NEED_CLEANUP)
+ return 0;
+ mode = READ_ONCE(sqe->len);
+ flags = READ_ONCE(sqe->open_flags);
+ req->open.how = build_open_how(flags, mode);
+ return __io_openat_prep(req, sqe);
+}
+
static int io_openat2_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct open_how __user *how;
- const char __user *fname;
size_t len;
int ret;
- if (sqe->ioprio || sqe->buf_index)
- return -EINVAL;
- if (req->flags & REQ_F_FIXED_FILE)
- return -EBADF;
if (req->flags & REQ_F_NEED_CLEANUP)
return 0;
-
- req->open.dfd = READ_ONCE(sqe->fd);
- fname = u64_to_user_ptr(READ_ONCE(sqe->addr));
how = u64_to_user_ptr(READ_ONCE(sqe->addr2));
len = READ_ONCE(sqe->len);
-
if (len < OPEN_HOW_SIZE_VER0)
return -EINVAL;
@@ -3039,19 +3031,7 @@
if (ret)
return ret;
- if (!(req->open.how.flags & O_PATH) && force_o_largefile())
- req->open.how.flags |= O_LARGEFILE;
-
- req->open.filename = getname(fname);
- if (IS_ERR(req->open.filename)) {
- ret = PTR_ERR(req->open.filename);
- req->open.filename = NULL;
- return ret;
- }
-
- req->open.nofile = rlimit(RLIMIT_NOFILE);
- req->flags |= REQ_F_NEED_CLEANUP;
- return 0;
+ return __io_openat_prep(req, sqe);
}
static int io_openat2(struct io_kiocb *req, bool force_nonblock)
@@ -3091,7 +3071,6 @@
static int io_openat(struct io_kiocb *req, bool force_nonblock)
{
- req->open.how = build_open_how(req->open.how.flags, req->open.how.mode);
return io_openat2(req, force_nonblock);
}
@@ -3180,7 +3159,7 @@
p->addr = READ_ONCE(sqe->addr);
p->len = READ_ONCE(sqe->len);
- if (!access_ok(u64_to_user_ptr(p->addr), p->len))
+ if (!access_ok(u64_to_user_ptr(p->addr), (p->len * p->nbufs)))
return -EFAULT;
p->bgid = READ_ONCE(sqe->buf_group);
@@ -3258,6 +3237,8 @@
#if defined(CONFIG_EPOLL)
if (sqe->ioprio || sqe->buf_index)
return -EINVAL;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
req->epoll.epfd = READ_ONCE(sqe->fd);
req->epoll.op = READ_ONCE(sqe->len);
@@ -3302,6 +3283,8 @@
#if defined(CONFIG_ADVISE_SYSCALLS) && defined(CONFIG_MMU)
if (sqe->ioprio || sqe->buf_index || sqe->off)
return -EINVAL;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
req->madvise.addr = READ_ONCE(sqe->addr);
req->madvise.len = READ_ONCE(sqe->len);
@@ -3336,6 +3319,8 @@
{
if (sqe->ioprio || sqe->buf_index || sqe->addr)
return -EINVAL;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
req->fadvise.offset = READ_ONCE(sqe->off);
req->fadvise.len = READ_ONCE(sqe->len);
@@ -3369,6 +3354,8 @@
static int io_statx_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
if (sqe->ioprio || sqe->buf_index)
return -EINVAL;
if (req->flags & REQ_F_FIXED_FILE)
@@ -3409,10 +3396,14 @@
{
/*
* If we queue this for async, it must not be cancellable. That would
- * leave the 'file' in an undeterminate state.
+ * leave the 'file' in an undeterminate state, and here need to modify
+ * io_wq_work.flags, so initialize io_wq_work firstly.
*/
+ io_req_init_async(req);
req->work.flags |= IO_WQ_WORK_NO_CANCEL;
+ if (unlikely(req->ctx->flags & (IORING_SETUP_IOPOLL|IORING_SETUP_SQPOLL)))
+ return -EINVAL;
if (sqe->ioprio || sqe->off || sqe->addr || sqe->len ||
sqe->rw_flags || sqe->buf_index)
return -EINVAL;
@@ -3420,53 +3411,41 @@
return -EBADF;
req->close.fd = READ_ONCE(sqe->fd);
+ if ((req->file && req->file->f_op == &io_uring_fops) ||
+ req->close.fd == req->ctx->ring_fd)
+ return -EBADF;
+
+ req->close.put_file = NULL;
return 0;
}
-/* only called when __close_fd_get_file() is done */
-static void __io_close_finish(struct io_kiocb *req)
-{
- int ret;
-
- ret = filp_close(req->close.put_file, req->work.files);
- if (ret < 0)
- req_set_fail_links(req);
- io_cqring_add_event(req, ret);
- fput(req->close.put_file);
- io_put_req(req);
-}
-
-static void io_close_finish(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
-
- /* not cancellable, don't do io_req_cancelled() */
- __io_close_finish(req);
- io_steal_work(req, workptr);
-}
-
static int io_close(struct io_kiocb *req, bool force_nonblock)
{
+ struct io_close *close = &req->close;
int ret;
- req->close.put_file = NULL;
- ret = __close_fd_get_file(req->close.fd, &req->close.put_file);
- if (ret < 0)
- return (ret == -ENOENT) ? -EBADF : ret;
+ /* might be already done during nonblock submission */
+ if (!close->put_file) {
+ ret = __close_fd_get_file(close->fd, &close->put_file);
+ if (ret < 0)
+ return (ret == -ENOENT) ? -EBADF : ret;
+ }
/* if the file has a flush method, be safe and punt to async */
- if (req->close.put_file->f_op->flush && force_nonblock) {
+ if (close->put_file->f_op->flush && force_nonblock) {
/* avoid grabbing files - we don't need the files */
req->flags |= REQ_F_NO_FILE_TABLE | REQ_F_MUST_PUNT;
- req->work.func = io_close_finish;
return -EAGAIN;
}
- /*
- * No ->flush(), safely close from here and just punt the
- * fput() to async context.
- */
- __io_close_finish(req);
+ /* No ->flush() or already async, safely close from here */
+ ret = filp_close(close->put_file, req->work.files);
+ if (ret < 0)
+ req_set_fail_links(req);
+ io_cqring_add_event(req, ret);
+ fput(close->put_file);
+ close->put_file = NULL;
+ io_put_req(req);
return 0;
}
@@ -3488,38 +3467,20 @@
return 0;
}
-static void __io_sync_file_range(struct io_kiocb *req)
+static int io_sync_file_range(struct io_kiocb *req, bool force_nonblock)
{
int ret;
+ /* sync_file_range always requires a blocking context */
+ if (force_nonblock)
+ return -EAGAIN;
+
ret = sync_file_range(req->file, req->sync.off, req->sync.len,
req->sync.flags);
if (ret < 0)
req_set_fail_links(req);
io_cqring_add_event(req, ret);
io_put_req(req);
-}
-
-
-static void io_sync_file_range_finish(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
-
- if (io_req_cancelled(req))
- return;
- __io_sync_file_range(req);
- io_steal_work(req, workptr);
-}
-
-static int io_sync_file_range(struct io_kiocb *req, bool force_nonblock)
-{
- /* sync_file_range always requires a blocking context */
- if (force_nonblock) {
- req->work.func = io_sync_file_range_finish;
- return -EAGAIN;
- }
-
- __io_sync_file_range(req);
return 0;
}
@@ -3545,6 +3506,9 @@
struct io_async_ctx *io = req->io;
int ret;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
+
sr->msg_flags = READ_ONCE(sqe->msg_flags);
sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
@@ -3574,9 +3538,6 @@
struct socket *sock;
int ret;
- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_async_ctx io;
@@ -3630,9 +3591,6 @@
struct socket *sock;
int ret;
- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_sr_msg *sr = &req->sr_msg;
@@ -3785,6 +3743,9 @@
struct io_async_ctx *io = req->io;
int ret;
+ if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+ return -EINVAL;
+
sr->msg_flags = READ_ONCE(sqe->msg_flags);
sr->msg = u64_to_user_ptr(READ_ONCE(sqe->addr));
sr->len = READ_ONCE(sqe->len);
@@ -3813,9 +3774,6 @@
struct socket *sock;
int ret, cflags = 0;
- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_buffer *kbuf;
@@ -3877,9 +3835,6 @@
struct socket *sock;
int ret, cflags = 0;
- if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
- return -EINVAL;
-
sock = sock_from_file(req->file, &ret);
if (sock) {
struct io_sr_msg *sr = &req->sr_msg;
@@ -3947,49 +3902,30 @@
return 0;
}
-static int __io_accept(struct io_kiocb *req, bool force_nonblock)
+static int io_accept(struct io_kiocb *req, bool force_nonblock)
{
struct io_accept *accept = &req->accept;
- unsigned file_flags;
+ unsigned int file_flags = force_nonblock ? O_NONBLOCK : 0;
int ret;
- file_flags = force_nonblock ? O_NONBLOCK : 0;
+ if (req->file->f_flags & O_NONBLOCK)
+ req->flags |= REQ_F_NOWAIT;
+
ret = __sys_accept4_file(req->file, file_flags, accept->addr,
accept->addr_len, accept->flags,
accept->nofile);
if (ret == -EAGAIN && force_nonblock)
return -EAGAIN;
- if (ret == -ERESTARTSYS)
- ret = -EINTR;
- if (ret < 0)
+ if (ret < 0) {
+ if (ret == -ERESTARTSYS)
+ ret = -EINTR;
req_set_fail_links(req);
+ }
io_cqring_add_event(req, ret);
io_put_req(req);
return 0;
}
-static void io_accept_finish(struct io_wq_work **workptr)
-{
- struct io_kiocb *req = container_of(*workptr, struct io_kiocb, work);
-
- if (io_req_cancelled(req))
- return;
- __io_accept(req, false);
- io_steal_work(req, workptr);
-}
-
-static int io_accept(struct io_kiocb *req, bool force_nonblock)
-{
- int ret;
-
- ret = __io_accept(req, force_nonblock);
- if (ret == -EAGAIN && force_nonblock) {
- req->work.func = io_accept_finish;
- return -EAGAIN;
- }
- return 0;
-}
-
static int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
struct io_connect *conn = &req->connect;
@@ -4328,7 +4264,8 @@
spin_unlock_irq(&ctx->completion_lock);
/* restore ->work in case we need to retry again */
- memcpy(&req->work, &apoll->work, sizeof(req->work));
+ if (req->flags & REQ_F_WORK_INITIALIZED)
+ memcpy(&req->work, &apoll->work, sizeof(req->work));
kfree(apoll);
if (!canceled) {
@@ -4425,7 +4362,8 @@
return false;
req->flags |= REQ_F_POLLED;
- memcpy(&apoll->work, &req->work, sizeof(req->work));
+ if (req->flags & REQ_F_WORK_INITIALIZED)
+ memcpy(&apoll->work, &req->work, sizeof(req->work));
had_io = req->io != NULL;
get_task_struct(current);
@@ -4450,7 +4388,8 @@
if (!had_io)
io_poll_remove_double(req);
spin_unlock_irq(&ctx->completion_lock);
- memcpy(&req->work, &apoll->work, sizeof(req->work));
+ if (req->flags & REQ_F_WORK_INITIALIZED)
+ memcpy(&req->work, &apoll->work, sizeof(req->work));
kfree(apoll);
return false;
}
@@ -4495,7 +4434,9 @@
* io_req_work_drop_env below when dropping the
* final reference.
*/
- memcpy(&req->work, &apoll->work, sizeof(req->work));
+ if (req->flags & REQ_F_WORK_INITIALIZED)
+ memcpy(&req->work, &apoll->work,
+ sizeof(req->work));
kfree(apoll);
}
}
@@ -4944,6 +4885,8 @@
if (!sqe)
return 0;
+ io_req_init_async(req);
+
if (io_op_defs[req->opcode].file_table) {
ret = io_grab_files(req);
if (unlikely(ret))
@@ -5381,12 +5324,26 @@
return 0;
}
+static void io_arm_async_linked_timeout(struct io_kiocb *req)
+{
+ struct io_kiocb *link;
+
+ /* link head's timeout is queued in io_queue_async_work() */
+ if (!(req->flags & REQ_F_QUEUE_TIMEOUT))
+ return;
+
+ link = list_first_entry(&req->link_list, struct io_kiocb, link_list);
+ io_queue_linked_timeout(link);
+}
+
static void io_wq_submit_work(struct io_wq_work **workptr)
{
struct io_wq_work *work = *workptr;
struct io_kiocb *req = container_of(work, struct io_kiocb, work);
int ret = 0;
+ io_arm_async_linked_timeout(req);
+
/* if NO_CANCEL is set, we must still run the work */
if ((work->flags & (IO_WQ_WORK_CANCEL|IO_WQ_WORK_NO_CANCEL)) ==
IO_WQ_WORK_CANCEL) {
@@ -5437,19 +5394,20 @@
return -EBADF;
fd = array_index_nospec(fd, ctx->nr_user_files);
file = io_file_from_index(ctx, fd);
- if (!file)
- return -EBADF;
- req->fixed_file_refs = ctx->file_data->cur_refs;
- percpu_ref_get(req->fixed_file_refs);
+ if (file) {
+ req->fixed_file_refs = ctx->file_data->cur_refs;
+ percpu_ref_get(req->fixed_file_refs);
+ }
} else {
trace_io_uring_file_get(ctx, fd);
file = __io_file_get(state, fd);
- if (unlikely(!file))
- return -EBADF;
}
- *out_file = file;
- return 0;
+ if (file || io_op_defs[req->opcode].needs_file_no_error) {
+ *out_file = file;
+ return 0;
+ }
+ return -EBADF;
}
static int io_req_set_file(struct io_submit_state *state, struct io_kiocb *req,
@@ -5583,7 +5541,8 @@
again:
linked_timeout = io_prep_linked_timeout(req);
- if (req->work.creds && req->work.creds != current_cred()) {
+ if ((req->flags & REQ_F_WORK_INITIALIZED) && req->work.creds &&
+ req->work.creds != current_cred()) {
if (old_creds)
revert_creds(old_creds);
if (old_creds == req->work.creds)
@@ -5606,6 +5565,8 @@
goto exit;
}
punt:
+ io_req_init_async(req);
+
if (io_op_defs[req->opcode].file_table) {
ret = io_grab_files(req);
if (ret)
@@ -5858,7 +5819,6 @@
refcount_set(&req->refs, 2);
req->task = NULL;
req->result = 0;
- INIT_IO_WORK(&req->work, io_wq_submit_work);
if (unlikely(req->opcode >= IORING_OP_LAST))
return -EINVAL;
@@ -5880,6 +5840,7 @@
id = READ_ONCE(sqe->personality);
if (id) {
+ io_req_init_async(req);
req->work.creds = idr_find(&ctx->personality_idr, id);
if (unlikely(!req->work.creds))
return -EINVAL;
@@ -6874,6 +6835,7 @@
data.user = ctx->user;
data.free_work = io_free_work;
+ data.do_work = io_wq_submit_work;
if (!(p->flags & IORING_SETUP_ATTACH_WQ)) {
/* Do QD, or 4 * CPUS, whatever is smallest */
@@ -7155,8 +7117,8 @@
ret = 0;
if (!pages || nr_pages > got_pages) {
- kfree(vmas);
- kfree(pages);
+ kvfree(vmas);
+ kvfree(pages);
pages = kvmalloc_array(nr_pages, sizeof(struct page *),
GFP_KERNEL);
vmas = kvmalloc_array(nr_pages,
