diff options
Diffstat (limited to 'io_uring/tctx.c')
| -rw-r--r-- | io_uring/tctx.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/io_uring/tctx.c b/io_uring/tctx.c index 5a5d4f908529..a819da8fc85c 100644 --- a/io_uring/tctx.c +++ b/io_uring/tctx.c @@ -94,12 +94,32 @@ __cold int io_uring_alloc_task_context(struct task_struct *task, return 0; } -int __io_uring_add_tctx_node(struct io_ring_ctx *ctx) +static int io_register_submitter(struct io_ring_ctx *ctx) +{ + int ret = 0; + + mutex_lock(&ctx->uring_lock); + if (!ctx->submitter_task) + ctx->submitter_task = get_task_struct(current); + else if (ctx->submitter_task != current) + ret = -EEXIST; + mutex_unlock(&ctx->uring_lock); + + return ret; +} + +int __io_uring_add_tctx_node(struct io_ring_ctx *ctx, bool submitter) { struct io_uring_task *tctx = current->io_uring; struct io_tctx_node *node; int ret; + if ((ctx->flags & IORING_SETUP_SINGLE_ISSUER) && submitter) { + ret = io_register_submitter(ctx); + if (ret) + return ret; + } + if (unlikely(!tctx)) { ret = io_uring_alloc_task_context(current, ctx); if (unlikely(ret)) @@ -133,7 +153,8 @@ int __io_uring_add_tctx_node(struct io_ring_ctx *ctx) list_add(&node->ctx_node, &ctx->tctx_list); mutex_unlock(&ctx->uring_lock); } - tctx->last = ctx; + if (submitter) + tctx->last = ctx; return 0; } @@ -241,7 +262,7 @@ int io_ringfd_register(struct io_ring_ctx *ctx, void __user *__arg, return -EINVAL; mutex_unlock(&ctx->uring_lock); - ret = io_uring_add_tctx_node(ctx); + ret = __io_uring_add_tctx_node(ctx, false); mutex_lock(&ctx->uring_lock); if (ret) return ret; |