Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F552C4332F for ; Mon, 6 Dec 2021 14:05:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S245256AbhLFOJF (ORCPT ); Mon, 6 Dec 2021 09:09:05 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39064 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245200AbhLFOJC (ORCPT ); Mon, 6 Dec 2021 09:09:02 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 71FCBC061746; Mon, 6 Dec 2021 06:05:33 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0275A612D1; Mon, 6 Dec 2021 14:05:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6A3C0C341C2; Mon, 6 Dec 2021 14:05:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638799532; bh=dTWyRgyO2q4MVvz13vEISgxJ0TewJGF1M7T0aJRQO6M=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=YoAXpuVo4F0QNy8lSusjXu9D30v/2ridg6zbKbzLG/xI6HLKUUhgjtIi/h6OR+zFe Lwnj4Zv1rKthSgTz714adYI4RNdbnfKjU9/TlgLCNVl0Anwy0Hpz2l+WBb+40IbFyP 60RY3xBImKMTp/tLPJD6fBVyxWGFndX17VbJqKPVOlijJ3IyD/RGxHBotiAVTADqQ3 43ohxZYNpJBV0LSVq6IuOR1nqw9NIRy+HrgSuTXCDJtb182MCap7vUa1osE+Ecwykr DkMi1zBjQWAPyR9InSxNeLTf6RJEaXTmZqJdRQpXsdzycVFw0zSVcY/oL8f4aW1wco /iyNUjZToF3xA== From: Miguel Ojeda To: Linus Torvalds , Greg Kroah-Hartman Cc: rust-for-linux@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Miguel Ojeda , Alex Gaynor , Geoffrey Thomas , Wedson Almeida Filho , Sven Van Asbroeck , Gary Guo , Boqun Feng Subject: [PATCH 04/19] rust: add C helpers Date: Mon, 6 Dec 2021 15:02:58 +0100 Message-Id: <20211206140313.5653-5-ojeda@kernel.org> In-Reply-To: <20211206140313.5653-1-ojeda@kernel.org> References: <20211206140313.5653-1-ojeda@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This source file contains forwarders to C macros and inlined functions. Co-developed-by: Alex Gaynor Signed-off-by: Alex Gaynor Co-developed-by: Geoffrey Thomas Signed-off-by: Geoffrey Thomas Co-developed-by: Wedson Almeida Filho Signed-off-by: Wedson Almeida Filho Co-developed-by: Sven Van Asbroeck Signed-off-by: Sven Van Asbroeck Co-developed-by: Gary Guo Signed-off-by: Gary Guo Co-developed-by: Boqun Feng Signed-off-by: Boqun Feng Signed-off-by: Miguel Ojeda --- rust/helpers.c | 436 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 436 insertions(+) create mode 100644 rust/helpers.c diff --git a/rust/helpers.c b/rust/helpers.c new file mode 100644 index 000000000000..f3e3fb34d376 --- /dev/null +++ b/rust/helpers.c @@ -0,0 +1,436 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +__noreturn void rust_helper_BUG(void) +{ + BUG(); +} + +unsigned long rust_helper_copy_from_user(void *to, const void __user *from, unsigned long n) +{ + return copy_from_user(to, from, n); +} + +unsigned long rust_helper_copy_to_user(void __user *to, const void *from, unsigned long n) +{ + return copy_to_user(to, from, n); +} + +unsigned long rust_helper_clear_user(void __user *to, unsigned long n) +{ + return clear_user(to, n); +} + +void __iomem *rust_helper_ioremap(resource_size_t offset, unsigned long size) +{ + return ioremap(offset, size); +} +EXPORT_SYMBOL_GPL(rust_helper_ioremap); + +u8 rust_helper_readb(const volatile void __iomem *addr) +{ + return readb(addr); +} +EXPORT_SYMBOL_GPL(rust_helper_readb); + +u16 rust_helper_readw(const volatile void __iomem *addr) +{ + return readw(addr); +} +EXPORT_SYMBOL_GPL(rust_helper_readw); + +u32 rust_helper_readl(const volatile void __iomem *addr) +{ + return readl(addr); +} +EXPORT_SYMBOL_GPL(rust_helper_readl); + +#ifdef CONFIG_64BIT +u64 rust_helper_readq(const volatile void __iomem *addr) +{ + return readq(addr); +} +EXPORT_SYMBOL_GPL(rust_helper_readq); +#endif + +void rust_helper_writeb(u8 value, volatile void __iomem *addr) +{ + writeb(value, addr); +} +EXPORT_SYMBOL_GPL(rust_helper_writeb); + +void rust_helper_writew(u16 value, volatile void __iomem *addr) +{ + writew(value, addr); +} +EXPORT_SYMBOL_GPL(rust_helper_writew); + +void rust_helper_writel(u32 value, volatile void __iomem *addr) +{ + writel(value, addr); +} +EXPORT_SYMBOL_GPL(rust_helper_writel); + +#ifdef CONFIG_64BIT +void rust_helper_writeq(u64 value, volatile void __iomem *addr) +{ + writeq(value, addr); +} +EXPORT_SYMBOL_GPL(rust_helper_writeq); +#endif + +void rust_helper___spin_lock_init(spinlock_t *lock, const char *name, + struct lock_class_key *key) +{ +#ifdef CONFIG_DEBUG_SPINLOCK + __spin_lock_init(lock, name, key); +#else + spin_lock_init(lock); +#endif +} +EXPORT_SYMBOL_GPL(rust_helper___spin_lock_init); + +void rust_helper_spin_lock(spinlock_t *lock) +{ + spin_lock(lock); +} +EXPORT_SYMBOL_GPL(rust_helper_spin_lock); + +void rust_helper_spin_unlock(spinlock_t *lock) +{ + spin_unlock(lock); +} +EXPORT_SYMBOL_GPL(rust_helper_spin_unlock); + +unsigned long rust_helper_spin_lock_irqsave(spinlock_t *lock) +{ + unsigned long flags; + spin_lock_irqsave(lock, flags); + return flags; +} +EXPORT_SYMBOL_GPL(rust_helper_spin_lock_irqsave); + +void rust_helper_spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) +{ + spin_unlock_irqrestore(lock, flags); +} +EXPORT_SYMBOL_GPL(rust_helper_spin_unlock_irqrestore); + +void rust_helper_init_wait(struct wait_queue_entry *wq_entry) +{ + init_wait(wq_entry); +} +EXPORT_SYMBOL_GPL(rust_helper_init_wait); + +int rust_helper_signal_pending(struct task_struct *t) +{ + return signal_pending(t); +} +EXPORT_SYMBOL_GPL(rust_helper_signal_pending); + +struct page *rust_helper_alloc_pages(gfp_t gfp_mask, unsigned int order) +{ + return alloc_pages(gfp_mask, order); +} +EXPORT_SYMBOL_GPL(rust_helper_alloc_pages); + +void *rust_helper_kmap(struct page *page) +{ + return kmap(page); +} +EXPORT_SYMBOL_GPL(rust_helper_kmap); + +void rust_helper_kunmap(struct page *page) +{ + return kunmap(page); +} +EXPORT_SYMBOL_GPL(rust_helper_kunmap); + +int rust_helper_cond_resched(void) +{ + return cond_resched(); +} +EXPORT_SYMBOL_GPL(rust_helper_cond_resched); + +size_t rust_helper_copy_from_iter(void *addr, size_t bytes, struct iov_iter *i) +{ + return copy_from_iter(addr, bytes, i); +} +EXPORT_SYMBOL_GPL(rust_helper_copy_from_iter); + +size_t rust_helper_copy_to_iter(const void *addr, size_t bytes, struct iov_iter *i) +{ + return copy_to_iter(addr, bytes, i); +} +EXPORT_SYMBOL_GPL(rust_helper_copy_to_iter); + +bool rust_helper_IS_ERR(__force const void *ptr) +{ + return IS_ERR(ptr); +} +EXPORT_SYMBOL_GPL(rust_helper_IS_ERR); + +long rust_helper_PTR_ERR(__force const void *ptr) +{ + return PTR_ERR(ptr); +} +EXPORT_SYMBOL_GPL(rust_helper_PTR_ERR); + +const char *rust_helper_errname(int err) +{ + return errname(err); +} +EXPORT_SYMBOL_GPL(rust_helper_errname); + +void rust_helper_mutex_lock(struct mutex *lock) +{ + mutex_lock(lock); +} +EXPORT_SYMBOL_GPL(rust_helper_mutex_lock); + +void rust_helper_amba_set_drvdata(struct amba_device *dev, void *data) +{ + amba_set_drvdata(dev, data); +} +EXPORT_SYMBOL_GPL(rust_helper_amba_set_drvdata); + +void *rust_helper_amba_get_drvdata(struct amba_device *dev) +{ + return amba_get_drvdata(dev); +} +EXPORT_SYMBOL_GPL(rust_helper_amba_get_drvdata); + +void * +rust_helper_platform_get_drvdata(const struct platform_device *pdev) +{ + return platform_get_drvdata(pdev); +} +EXPORT_SYMBOL_GPL(rust_helper_platform_get_drvdata); + +void +rust_helper_platform_set_drvdata(struct platform_device *pdev, + void *data) +{ + return platform_set_drvdata(pdev, data); +} +EXPORT_SYMBOL_GPL(rust_helper_platform_set_drvdata); + +refcount_t rust_helper_REFCOUNT_INIT(int n) +{ + return (refcount_t)REFCOUNT_INIT(n); +} +EXPORT_SYMBOL_GPL(rust_helper_REFCOUNT_INIT); + +void rust_helper_refcount_inc(refcount_t *r) +{ + refcount_inc(r); +} +EXPORT_SYMBOL_GPL(rust_helper_refcount_inc); + +bool rust_helper_refcount_dec_and_test(refcount_t *r) +{ + return refcount_dec_and_test(r); +} +EXPORT_SYMBOL_GPL(rust_helper_refcount_dec_and_test); + +void rust_helper_rb_link_node(struct rb_node *node, struct rb_node *parent, + struct rb_node **rb_link) +{ + rb_link_node(node, parent, rb_link); +} +EXPORT_SYMBOL_GPL(rust_helper_rb_link_node); + +struct task_struct *rust_helper_get_current(void) +{ + return current; +} +EXPORT_SYMBOL_GPL(rust_helper_get_current); + +void rust_helper_get_task_struct(struct task_struct * t) +{ + get_task_struct(t); +} +EXPORT_SYMBOL_GPL(rust_helper_get_task_struct); + +void rust_helper_put_task_struct(struct task_struct * t) +{ + put_task_struct(t); +} +EXPORT_SYMBOL_GPL(rust_helper_put_task_struct); + +int rust_helper_security_binder_set_context_mgr(const struct cred *mgr) +{ + return security_binder_set_context_mgr(mgr); +} +EXPORT_SYMBOL_GPL(rust_helper_security_binder_set_context_mgr); + +int rust_helper_security_binder_transaction(const struct cred *from, + const struct cred *to) +{ + return security_binder_transaction(from, to); +} +EXPORT_SYMBOL_GPL(rust_helper_security_binder_transaction); + +int rust_helper_security_binder_transfer_binder(const struct cred *from, + const struct cred *to) +{ + return security_binder_transfer_binder(from, to); +} +EXPORT_SYMBOL_GPL(rust_helper_security_binder_transfer_binder); + +int rust_helper_security_binder_transfer_file(const struct cred *from, + const struct cred *to, + struct file *file) +{ + return security_binder_transfer_file(from, to, file); +} +EXPORT_SYMBOL_GPL(rust_helper_security_binder_transfer_file); + +void rust_helper_rcu_read_lock(void) +{ + rcu_read_lock(); +} +EXPORT_SYMBOL_GPL(rust_helper_rcu_read_lock); + +void rust_helper_rcu_read_unlock(void) +{ + rcu_read_unlock(); +} +EXPORT_SYMBOL_GPL(rust_helper_rcu_read_unlock); + +void rust_helper_synchronize_rcu(void) +{ + synchronize_rcu(); +} +EXPORT_SYMBOL_GPL(rust_helper_synchronize_rcu); + +void *rust_helper_dev_get_drvdata(struct device *dev) +{ + return dev_get_drvdata(dev); +} +EXPORT_SYMBOL_GPL(rust_helper_dev_get_drvdata); + +const char *rust_helper_dev_name(const struct device *dev) +{ + return dev_name(dev); +} +EXPORT_SYMBOL_GPL(rust_helper_dev_name); + +void rust_helper___seqcount_init(seqcount_t *s, const char *name, + struct lock_class_key *key) +{ + __seqcount_init(s, name, key); +} +EXPORT_SYMBOL_GPL(rust_helper___seqcount_init); + +unsigned rust_helper_read_seqcount_begin(seqcount_t *s) +{ + return read_seqcount_begin(s); +} +EXPORT_SYMBOL_GPL(rust_helper_read_seqcount_begin); + +int rust_helper_read_seqcount_retry(seqcount_t *s, unsigned start) +{ + return read_seqcount_retry(s, start); +} +EXPORT_SYMBOL_GPL(rust_helper_read_seqcount_retry); + +void rust_helper_write_seqcount_begin(seqcount_t *s) +{ + do_write_seqcount_begin(s); +} +EXPORT_SYMBOL_GPL(rust_helper_write_seqcount_begin); + +void rust_helper_write_seqcount_end(seqcount_t *s) +{ + do_write_seqcount_end(s); +} +EXPORT_SYMBOL_GPL(rust_helper_write_seqcount_end); + +void rust_helper_irq_set_handler_locked(struct irq_data *data, + irq_flow_handler_t handler) +{ + irq_set_handler_locked(data, handler); +} +EXPORT_SYMBOL_GPL(rust_helper_irq_set_handler_locked); + +void *rust_helper_irq_data_get_irq_chip_data(struct irq_data *d) +{ + return irq_data_get_irq_chip_data(d); +} +EXPORT_SYMBOL_GPL(rust_helper_irq_data_get_irq_chip_data); + +struct irq_chip *rust_helper_irq_desc_get_chip(struct irq_desc *desc) +{ + return irq_desc_get_chip(desc); +} +EXPORT_SYMBOL_GPL(rust_helper_irq_desc_get_chip); + +void *rust_helper_irq_desc_get_handler_data(struct irq_desc *desc) +{ + return irq_desc_get_handler_data(desc); +} +EXPORT_SYMBOL_GPL(rust_helper_irq_desc_get_handler_data); + +void rust_helper_chained_irq_enter(struct irq_chip *chip, + struct irq_desc *desc) +{ + chained_irq_enter(chip, desc); +} +EXPORT_SYMBOL_GPL(rust_helper_chained_irq_enter); + +void rust_helper_chained_irq_exit(struct irq_chip *chip, + struct irq_desc *desc) +{ + chained_irq_exit(chip, desc); +} +EXPORT_SYMBOL_GPL(rust_helper_chained_irq_exit); + +const struct cred *rust_helper_get_cred(const struct cred *cred) +{ + return get_cred(cred); +} +EXPORT_SYMBOL_GPL(rust_helper_get_cred); + +void rust_helper_put_cred(const struct cred *cred) { + put_cred(cred); +} +EXPORT_SYMBOL_GPL(rust_helper_put_cred); + +/* We use bindgen's --size_t-is-usize option to bind the C size_t type + * as the Rust usize type, so we can use it in contexts where Rust + * expects a usize like slice (array) indices. usize is defined to be + * the same as C's uintptr_t type (can hold any pointer) but not + * necessarily the same as size_t (can hold the size of any single + * object). Most modern platforms use the same concrete integer type for + * both of them, but in case we find ourselves on a platform where + * that's not true, fail early instead of risking ABI or + * integer-overflow issues. + * + * If your platform fails this assertion, it means that you are in + * danger of integer-overflow bugs (even if you attempt to remove + * --size_t-is-usize). It may be easiest to change the kernel ABI on + * your platform such that size_t matches uintptr_t (i.e., to increase + * size_t, because uintptr_t has to be at least as big as size_t). +*/ +static_assert( + sizeof(size_t) == sizeof(uintptr_t) && + __alignof__(size_t) == __alignof__(uintptr_t), + "Rust code expects C size_t to match Rust usize" +); -- 2.34.0