From: Xie Yongji <xieyongji@bytedance.com> To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com, robin.murphy@arm.com, will@kernel.org, john.garry@huawei.com Cc: kvm@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, virtualization@lists.linux-foundation.org, iommu@lists.linux-foundation.org, songmuchun@bytedance.com, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 03/13] file: Export receive_fd() to modules Date: Tue, 31 Aug 2021 18:36:24 +0800 [thread overview] Message-ID: <20210831103634.33-4-xieyongji@bytedance.com> (raw) In-Reply-To: <20210831103634.33-1-xieyongji@bytedance.com> Export receive_fd() so that some modules can use it to pass file descriptor between processes without missing any security stuffs. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> --- fs/file.c | 6 ++++++ include/linux/file.h | 7 +++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/fs/file.c b/fs/file.c index 86dc9956af32..210e540672aa 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1134,6 +1134,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags) return new_fd; } +int receive_fd(struct file *file, unsigned int o_flags) +{ + return __receive_fd(file, NULL, o_flags); +} +EXPORT_SYMBOL_GPL(receive_fd); + static int ksys_dup3(unsigned int oldfd, unsigned int newfd, int flags) { int err = -EBADF; diff --git a/include/linux/file.h b/include/linux/file.h index 2de2e4613d7b..51e830b4fe3a 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -94,6 +94,9 @@ extern void fd_install(unsigned int fd, struct file *file); extern int __receive_fd(struct file *file, int __user *ufd, unsigned int o_flags); + +extern int receive_fd(struct file *file, unsigned int o_flags); + static inline int receive_fd_user(struct file *file, int __user *ufd, unsigned int o_flags) { @@ -101,10 +104,6 @@ static inline int receive_fd_user(struct file *file, int __user *ufd, return -EFAULT; return __receive_fd(file, ufd, o_flags); } -static inline int receive_fd(struct file *file, unsigned int o_flags) -{ - return __receive_fd(file, NULL, o_flags); -} int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags); extern void flush_delayed_fput(void); -- 2.11.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Xie Yongji <xieyongji@bytedance.com> To: mst@redhat.com, jasowang@redhat.com, stefanha@redhat.com, sgarzare@redhat.com, parav@nvidia.com, hch@infradead.org, christian.brauner@canonical.com, rdunlap@infradead.org, willy@infradead.org, viro@zeniv.linux.org.uk, axboe@kernel.dk, bcrl@kvack.org, corbet@lwn.net, mika.penttila@nextfour.com, dan.carpenter@oracle.com, joro@8bytes.org, gregkh@linuxfoundation.org, zhe.he@windriver.com, xiaodong.liu@intel.com, joe@perches.com, robin.murphy@arm.com, will@kernel.org, john.garry@huawei.com Cc: songmuchun@bytedance.com, virtualization@lists.linux-foundation.org, netdev@vger.kernel.org, kvm@vger.kernel.org, linux-fsdevel@vger.kernel.org, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org Subject: [PATCH v13 03/13] file: Export receive_fd() to modules Date: Tue, 31 Aug 2021 18:36:24 +0800 [thread overview] Message-ID: <20210831103634.33-4-xieyongji@bytedance.com> (raw) In-Reply-To: <20210831103634.33-1-xieyongji@bytedance.com> Export receive_fd() so that some modules can use it to pass file descriptor between processes without missing any security stuffs. Signed-off-by: Xie Yongji <xieyongji@bytedance.com> Acked-by: Jason Wang <jasowang@redhat.com> --- fs/file.c | 6 ++++++ include/linux/file.h | 7 +++---- 2 files changed, 9 insertions(+), 4 deletions(-) diff --git a/fs/file.c b/fs/file.c index 86dc9956af32..210e540672aa 100644 --- a/fs/file.c +++ b/fs/file.c @@ -1134,6 +1134,12 @@ int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags) return new_fd; } +int receive_fd(struct file *file, unsigned int o_flags) +{ + return __receive_fd(file, NULL, o_flags); +} +EXPORT_SYMBOL_GPL(receive_fd); + static int ksys_dup3(unsigned int oldfd, unsigned int newfd, int flags) { int err = -EBADF; diff --git a/include/linux/file.h b/include/linux/file.h index 2de2e4613d7b..51e830b4fe3a 100644 --- a/include/linux/file.h +++ b/include/linux/file.h @@ -94,6 +94,9 @@ extern void fd_install(unsigned int fd, struct file *file); extern int __receive_fd(struct file *file, int __user *ufd, unsigned int o_flags); + +extern int receive_fd(struct file *file, unsigned int o_flags); + static inline int receive_fd_user(struct file *file, int __user *ufd, unsigned int o_flags) { @@ -101,10 +104,6 @@ static inline int receive_fd_user(struct file *file, int __user *ufd, return -EFAULT; return __receive_fd(file, ufd, o_flags); } -static inline int receive_fd(struct file *file, unsigned int o_flags) -{ - return __receive_fd(file, NULL, o_flags); -} int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags); extern void flush_delayed_fput(void); -- 2.11.0
next prev parent reply other threads:[~2021-08-31 10:37 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-31 10:36 [PATCH v13 00/13] Introduce VDUSE - vDPA Device in Userspace Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 01/13] iova: Export alloc_iova_fast() and free_iova_fast() Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 02/13] eventfd: Export eventfd_wake_count to modules Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-09-01 2:50 ` Jason Wang 2021-09-01 2:50 ` Jason Wang 2021-09-01 2:50 ` Jason Wang 2021-08-31 10:36 ` Xie Yongji [this message] 2021-08-31 10:36 ` [PATCH v13 03/13] file: Export receive_fd() " Xie Yongji 2021-09-05 15:57 ` Michael S. Tsirkin 2021-09-05 15:57 ` Michael S. Tsirkin 2021-09-05 15:57 ` Michael S. Tsirkin 2021-09-05 16:44 ` Al Viro 2021-09-05 16:44 ` Al Viro 2021-09-05 16:44 ` Al Viro 2021-08-31 10:36 ` [PATCH v13 04/13] vdpa: Fix some coding style issues Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 05/13] vdpa: Add reset callback in vdpa_config_ops Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-09-06 5:55 ` Michael S. Tsirkin 2021-09-06 5:55 ` Michael S. Tsirkin 2021-09-06 5:55 ` Michael S. Tsirkin 2021-09-06 6:09 ` Yongji Xie 2021-09-06 6:09 ` Yongji Xie 2021-09-06 6:37 ` Michael S. Tsirkin 2021-09-06 6:37 ` Michael S. Tsirkin 2021-09-06 6:37 ` Michael S. Tsirkin 2021-09-06 7:06 ` Yongji Xie 2021-09-06 7:06 ` Yongji Xie 2021-09-06 8:00 ` Michael S. Tsirkin 2021-09-06 8:00 ` Michael S. Tsirkin 2021-09-06 8:00 ` Michael S. Tsirkin 2021-09-06 8:45 ` Yongji Xie 2021-09-06 8:45 ` Yongji Xie 2021-09-06 10:43 ` Michael S. Tsirkin 2021-09-06 10:43 ` Michael S. Tsirkin 2021-09-06 10:43 ` Michael S. Tsirkin 2021-09-06 12:13 ` Yongji Xie 2021-09-06 12:13 ` Yongji Xie 2021-08-31 10:36 ` [PATCH v13 06/13] vhost-vdpa: Handle the failure of vdpa_reset() Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 07/13] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 08/13] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 09/13] vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap() Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 10/13] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 11/13] vduse: Implement an MMU-based software IOTLB Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 12/13] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-08-31 10:36 ` [PATCH v13 13/13] Documentation: Add documentation for VDUSE Xie Yongji 2021-08-31 10:36 ` Xie Yongji 2021-10-11 7:32 ` [PATCH v13 00/13] Introduce VDUSE - vDPA Device in Userspace Liuxiangdong 2021-10-11 8:31 ` Yongji Xie 2021-10-11 8:32 ` Yongji Xie
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