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io_uring: add generic rsrc update with tags
Add IORING_REGISTER_RSRC_UPDATE, which also supports passing in rsrc tags. Implement it for registered files. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/d4dc66df204212f64835ffca2c4eb5e8363f2f05.1619356238.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
parent
792e35824b
commit
c3bdad0271
2 changed files with 57 additions and 17 deletions
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@ -1036,7 +1036,7 @@ static void io_put_task(struct task_struct *task, int nr);
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static struct io_kiocb *io_prep_linked_timeout(struct io_kiocb *req);
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static void io_queue_linked_timeout(struct io_kiocb *req);
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static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
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struct io_uring_rsrc_update *up,
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struct io_uring_rsrc_update2 *up,
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unsigned nr_args);
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static void io_clean_op(struct io_kiocb *req);
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static struct file *io_file_get(struct io_submit_state *state,
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@ -5814,7 +5814,7 @@ static int io_rsrc_update_prep(struct io_kiocb *req,
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static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
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{
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struct io_ring_ctx *ctx = req->ctx;
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struct io_uring_rsrc_update up;
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struct io_uring_rsrc_update2 up;
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int ret;
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if (issue_flags & IO_URING_F_NONBLOCK)
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@ -5822,6 +5822,8 @@ static int io_files_update(struct io_kiocb *req, unsigned int issue_flags)
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up.offset = req->rsrc_update.offset;
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up.data = req->rsrc_update.arg;
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up.nr = 0;
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up.tags = 0;
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mutex_lock(&ctx->uring_lock);
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ret = __io_register_rsrc_update(ctx, IORING_RSRC_FILE,
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@ -7732,9 +7734,10 @@ static int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
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}
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static int __io_sqe_files_update(struct io_ring_ctx *ctx,
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struct io_uring_rsrc_update *up,
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struct io_uring_rsrc_update2 *up,
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unsigned nr_args)
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{
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u64 __user *tags = u64_to_user_ptr(up->tags);
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__s32 __user *fds = u64_to_user_ptr(up->data);
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struct io_rsrc_data *data = ctx->file_data;
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struct io_fixed_file *file_slot;
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@ -7749,10 +7752,17 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
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return -EINVAL;
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for (done = 0; done < nr_args; done++) {
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if (copy_from_user(&fd, &fds[done], sizeof(fd))) {
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u64 tag = 0;
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if ((tags && copy_from_user(&tag, &tags[done], sizeof(tag))) ||
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copy_from_user(&fd, &fds[done], sizeof(fd))) {
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err = -EFAULT;
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break;
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}
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if ((fd == IORING_REGISTER_FILES_SKIP || fd == -1) && tag) {
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err = -EINVAL;
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break;
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}
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if (fd == IORING_REGISTER_FILES_SKIP)
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continue;
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@ -7787,6 +7797,7 @@ static int __io_sqe_files_update(struct io_ring_ctx *ctx,
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err = -EBADF;
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break;
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}
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data->tags[up->offset + done] = tag;
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io_fixed_file_set(file_slot, file);
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err = io_sqe_file_register(ctx, file, i);
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if (err) {
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@ -9718,12 +9729,14 @@ static int io_register_enable_rings(struct io_ring_ctx *ctx)
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}
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static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
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struct io_uring_rsrc_update *up,
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struct io_uring_rsrc_update2 *up,
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unsigned nr_args)
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{
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__u32 tmp;
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int err;
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if (up->resv)
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return -EINVAL;
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if (check_add_overflow(up->offset, nr_args, &tmp))
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return -EOVERFLOW;
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err = io_rsrc_node_switch_start(ctx);
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@ -9737,18 +9750,31 @@ static int __io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
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return -EINVAL;
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}
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static int io_register_rsrc_update(struct io_ring_ctx *ctx, unsigned type,
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void __user *arg, unsigned nr_args)
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static int io_register_files_update(struct io_ring_ctx *ctx, void __user *arg,
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unsigned nr_args)
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{
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struct io_uring_rsrc_update up;
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struct io_uring_rsrc_update2 up;
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if (!nr_args)
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return -EINVAL;
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memset(&up, 0, sizeof(up));
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if (copy_from_user(&up, arg, sizeof(struct io_uring_rsrc_update)))
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return -EFAULT;
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return __io_register_rsrc_update(ctx, IORING_RSRC_FILE, &up, nr_args);
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}
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static int io_register_rsrc_update(struct io_ring_ctx *ctx, void __user *arg,
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unsigned size)
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{
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struct io_uring_rsrc_update2 up;
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if (size != sizeof(up))
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return -EINVAL;
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if (copy_from_user(&up, arg, sizeof(up)))
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return -EFAULT;
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if (up.resv)
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if (!up.nr)
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return -EINVAL;
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return __io_register_rsrc_update(ctx, type, &up, nr_args);
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return __io_register_rsrc_update(ctx, up.type, &up, up.nr);
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}
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static int io_register_rsrc(struct io_ring_ctx *ctx, void __user *arg,
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@ -9784,6 +9810,7 @@ static bool io_register_op_must_quiesce(int op)
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case IORING_REGISTER_PERSONALITY:
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case IORING_UNREGISTER_PERSONALITY:
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case IORING_REGISTER_RSRC:
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case IORING_REGISTER_RSRC_UPDATE:
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return false;
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default:
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return true;
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@ -9861,7 +9888,7 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
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ret = io_sqe_files_unregister(ctx);
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break;
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case IORING_REGISTER_FILES_UPDATE:
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ret = io_register_rsrc_update(ctx, IORING_RSRC_FILE, arg, nr_args);
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ret = io_register_files_update(ctx, arg, nr_args);
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break;
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case IORING_REGISTER_EVENTFD:
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case IORING_REGISTER_EVENTFD_ASYNC:
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@ -9912,6 +9939,9 @@ static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
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case IORING_REGISTER_RSRC:
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ret = io_register_rsrc(ctx, arg, nr_args);
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break;
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case IORING_REGISTER_RSRC_UPDATE:
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ret = io_register_rsrc_update(ctx, arg, nr_args);
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break;
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default:
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ret = -EINVAL;
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break;
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@ -299,6 +299,7 @@ enum {
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IORING_REGISTER_RESTRICTIONS = 11,
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IORING_REGISTER_ENABLE_RINGS = 12,
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IORING_REGISTER_RSRC = 13,
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IORING_REGISTER_RSRC_UPDATE = 14,
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/* this goes last */
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IORING_REGISTER_LAST
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@ -311,12 +312,6 @@ struct io_uring_files_update {
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__aligned_u64 /* __s32 * */ fds;
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};
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struct io_uring_rsrc_update {
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__u32 offset;
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__u32 resv;
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__aligned_u64 data;
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};
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enum {
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IORING_RSRC_FILE = 0,
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};
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@ -328,6 +323,21 @@ struct io_uring_rsrc_register {
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__aligned_u64 tags;
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};
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struct io_uring_rsrc_update {
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__u32 offset;
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__u32 resv;
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__aligned_u64 data;
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};
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struct io_uring_rsrc_update2 {
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__u32 offset;
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__u32 resv;
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__aligned_u64 data;
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__aligned_u64 tags;
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__u32 type;
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__u32 nr;
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};
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/* Skip updating fd indexes set to this value in the fd table */
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#define IORING_REGISTER_FILES_SKIP (-2)
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