io_uring: split out fixed file installation and removal
Put it with the filetable code, which is where it belongs. While doing so, have the helpers take a ctx rather than an io_kiocb. It doesn't make sense to use a request, as it's not an operation on the request itself. It applies to the ring itself. Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
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8fcf4c48f4
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f110ed8498
@ -58,11 +58,10 @@ void io_free_file_tables(struct io_file_table *table)
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table->bitmap = NULL;
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table->bitmap = NULL;
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}
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}
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static int io_install_fixed_file(struct io_kiocb *req, struct file *file,
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static int io_install_fixed_file(struct io_ring_ctx *ctx, struct file *file,
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unsigned int issue_flags, u32 slot_index)
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u32 slot_index)
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__must_hold(&req->ctx->uring_lock)
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__must_hold(&req->ctx->uring_lock)
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{
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{
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struct io_ring_ctx *ctx = req->ctx;
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bool needs_switch = false;
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bool needs_switch = false;
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struct io_fixed_file *file_slot;
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struct io_fixed_file *file_slot;
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int ret;
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int ret;
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@ -108,6 +107,26 @@ err:
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return ret;
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return ret;
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}
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}
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int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
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unsigned int file_slot)
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{
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bool alloc_slot = file_slot == IORING_FILE_INDEX_ALLOC;
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int ret;
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if (alloc_slot) {
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ret = io_file_bitmap_get(ctx);
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if (unlikely(ret < 0))
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return ret;
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file_slot = ret;
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} else {
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file_slot--;
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}
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ret = io_install_fixed_file(ctx, file, file_slot);
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if (!ret && alloc_slot)
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ret = file_slot;
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return ret;
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}
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/*
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/*
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* Note when io_fixed_fd_install() returns error value, it will ensure
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* Note when io_fixed_fd_install() returns error value, it will ensure
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* fput() is called correspondingly.
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* fput() is called correspondingly.
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@ -115,27 +134,44 @@ err:
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int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
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int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
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struct file *file, unsigned int file_slot)
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struct file *file, unsigned int file_slot)
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{
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{
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bool alloc_slot = file_slot == IORING_FILE_INDEX_ALLOC;
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struct io_ring_ctx *ctx = req->ctx;
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struct io_ring_ctx *ctx = req->ctx;
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int ret;
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int ret;
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io_ring_submit_lock(ctx, issue_flags);
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io_ring_submit_lock(ctx, issue_flags);
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ret = __io_fixed_fd_install(ctx, file, file_slot);
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if (alloc_slot) {
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ret = io_file_bitmap_get(ctx);
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if (unlikely(ret < 0))
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goto err;
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file_slot = ret;
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} else {
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file_slot--;
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}
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ret = io_install_fixed_file(req, file, issue_flags, file_slot);
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if (!ret && alloc_slot)
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ret = file_slot;
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err:
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io_ring_submit_unlock(ctx, issue_flags);
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io_ring_submit_unlock(ctx, issue_flags);
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if (unlikely(ret < 0))
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if (unlikely(ret < 0))
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fput(file);
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fput(file);
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return ret;
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return ret;
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}
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}
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int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset)
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{
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struct io_fixed_file *file_slot;
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struct file *file;
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int ret;
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if (unlikely(!ctx->file_data))
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return -ENXIO;
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if (offset >= ctx->nr_user_files)
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return -EINVAL;
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ret = io_rsrc_node_switch_start(ctx);
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if (ret)
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return ret;
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offset = array_index_nospec(offset, ctx->nr_user_files);
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file_slot = io_fixed_file_slot(&ctx->file_table, offset);
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if (!file_slot->file_ptr)
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return -EBADF;
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file = (struct file *)(file_slot->file_ptr & FFS_MASK);
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ret = io_queue_rsrc_removal(ctx->file_data, offset, ctx->rsrc_node, file);
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if (ret)
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return ret;
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file_slot->file_ptr = 0;
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io_file_bitmap_clear(&ctx->file_table, offset);
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io_rsrc_node_switch(ctx, ctx->file_data);
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return 0;
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}
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@ -29,6 +29,9 @@ void io_free_file_tables(struct io_file_table *table);
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int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
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int io_fixed_fd_install(struct io_kiocb *req, unsigned int issue_flags,
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struct file *file, unsigned int file_slot);
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struct file *file, unsigned int file_slot);
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int __io_fixed_fd_install(struct io_ring_ctx *ctx, struct file *file,
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unsigned int file_slot);
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int io_fixed_fd_remove(struct io_ring_ctx *ctx, unsigned int offset);
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unsigned int io_file_get_flags(struct file *file);
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unsigned int io_file_get_flags(struct file *file);
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@ -173,42 +173,15 @@ void io_open_cleanup(struct io_kiocb *req)
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putname(open->filename);
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putname(open->filename);
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}
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}
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int __io_close_fixed(struct io_kiocb *req, unsigned int issue_flags,
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int __io_close_fixed(struct io_ring_ctx *ctx, unsigned int issue_flags,
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unsigned int offset)
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unsigned int offset)
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{
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{
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struct io_ring_ctx *ctx = req->ctx;
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struct io_fixed_file *file_slot;
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struct file *file;
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int ret;
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int ret;
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io_ring_submit_lock(ctx, issue_flags);
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io_ring_submit_lock(ctx, issue_flags);
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ret = -ENXIO;
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ret = io_fixed_fd_remove(ctx, offset);
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if (unlikely(!ctx->file_data))
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goto out;
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ret = -EINVAL;
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if (offset >= ctx->nr_user_files)
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goto out;
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ret = io_rsrc_node_switch_start(ctx);
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if (ret)
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goto out;
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offset = array_index_nospec(offset, ctx->nr_user_files);
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file_slot = io_fixed_file_slot(&ctx->file_table, offset);
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ret = -EBADF;
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if (!file_slot->file_ptr)
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goto out;
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file = (struct file *)(file_slot->file_ptr & FFS_MASK);
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ret = io_queue_rsrc_removal(ctx->file_data, offset, ctx->rsrc_node, file);
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if (ret)
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goto out;
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file_slot->file_ptr = 0;
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io_file_bitmap_clear(&ctx->file_table, offset);
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io_rsrc_node_switch(ctx, ctx->file_data);
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ret = 0;
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out:
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io_ring_submit_unlock(ctx, issue_flags);
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io_ring_submit_unlock(ctx, issue_flags);
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return ret;
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return ret;
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}
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}
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@ -216,7 +189,7 @@ static inline int io_close_fixed(struct io_kiocb *req, unsigned int issue_flags)
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{
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{
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struct io_close *close = io_kiocb_to_cmd(req);
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struct io_close *close = io_kiocb_to_cmd(req);
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return __io_close_fixed(req, issue_flags, close->file_slot - 1);
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return __io_close_fixed(req->ctx, issue_flags, close->file_slot - 1);
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}
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}
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int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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int io_close_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
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@ -1,6 +1,6 @@
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// SPDX-License-Identifier: GPL-2.0
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// SPDX-License-Identifier: GPL-2.0
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int __io_close_fixed(struct io_kiocb *req, unsigned int issue_flags,
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int __io_close_fixed(struct io_ring_ctx *ctx, unsigned int issue_flags,
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unsigned int offset);
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unsigned int offset);
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int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
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int io_openat_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe);
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@ -703,7 +703,7 @@ static int io_files_update_with_index_alloc(struct io_kiocb *req,
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if (ret < 0)
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if (ret < 0)
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break;
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break;
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if (copy_to_user(&fds[done], &ret, sizeof(ret))) {
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if (copy_to_user(&fds[done], &ret, sizeof(ret))) {
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__io_close_fixed(req, issue_flags, ret);
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__io_close_fixed(req->ctx, issue_flags, ret);
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ret = -EFAULT;
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ret = -EFAULT;
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break;
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break;
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}
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}
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