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
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 v10 02/17] file: Export receive_fd() to modules
Date: Thu, 29 Jul 2021 15:34:48 +0800 [thread overview]
Message-ID: <20210729073503.187-3-xieyongji@bytedance.com> (raw)
In-Reply-To: <20210729073503.187-1-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>
---
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
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
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 v10 02/17] file: Export receive_fd() to modules
Date: Thu, 29 Jul 2021 15:34:48 +0800 [thread overview]
Message-ID: <20210729073503.187-3-xieyongji@bytedance.com> (raw)
In-Reply-To: <20210729073503.187-1-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>
---
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
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next prev parent reply other threads:[~2021-07-29 7:36 UTC|newest]
Thread overview: 131+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-29 7:34 [PATCH v10 00/17] Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 01/17] iova: Export alloc_iova_fast() and free_iova_fast() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 7:41 ` Jason Wang
2021-08-03 7:41 ` Jason Wang
2021-08-03 7:41 ` Jason Wang
2021-08-03 7:41 ` Jason Wang
2021-08-03 7:41 ` Jason Wang
2021-08-03 7:41 ` Jason Wang
2021-08-03 8:54 ` Yongji Xie
2021-08-03 8:54 ` Yongji Xie
2021-08-03 10:53 ` Robin Murphy
2021-08-03 10:53 ` Robin Murphy
2021-08-03 10:53 ` Robin Murphy
2021-08-04 5:02 ` Yongji Xie
2021-08-04 5:02 ` Yongji Xie
2021-08-04 15:43 ` Robin Murphy
2021-08-04 15:43 ` Robin Murphy
2021-08-04 15:43 ` Robin Murphy
2021-08-05 12:34 ` Yongji Xie
2021-08-05 12:34 ` Yongji Xie
2021-08-05 13:31 ` Jason Wang
2021-08-05 13:31 ` Jason Wang
2021-08-05 13:31 ` Jason Wang
2021-08-09 5:56 ` Yongji Xie
2021-08-09 5:56 ` Yongji Xie
2021-08-10 3:02 ` Jason Wang
2021-08-10 3:02 ` Jason Wang
2021-08-10 3:02 ` Jason Wang
2021-08-10 7:43 ` Yongji Xie
2021-08-10 7:43 ` Yongji Xie
2021-07-29 7:34 ` Xie Yongji [this message]
2021-07-29 7:34 ` [PATCH v10 02/17] file: Export receive_fd() to modules Xie Yongji
2021-08-03 7:45 ` Jason Wang
2021-08-03 7:45 ` Jason Wang
2021-08-03 7:45 ` Jason Wang
2021-08-03 9:01 ` Yongji Xie
2021-08-03 9:01 ` Yongji Xie
2021-08-04 8:27 ` Jason Wang
2021-08-04 8:27 ` Jason Wang
2021-08-04 8:27 ` Jason Wang
2021-07-29 7:34 ` [PATCH v10 03/17] vdpa: Fix code indentation Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 7:50 ` Jason Wang
2021-08-03 7:50 ` Jason Wang
2021-08-03 7:50 ` Jason Wang
2021-08-03 9:13 ` Yongji Xie
2021-08-03 9:13 ` Yongji Xie
2021-07-29 7:34 ` [PATCH v10 04/17] vdpa: Fail the vdpa_reset() if fail to set device status to zero Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 7:58 ` Jason Wang
2021-08-03 7:58 ` Jason Wang
2021-08-03 7:58 ` Jason Wang
2021-08-03 9:31 ` Yongji Xie
2021-08-03 9:31 ` Yongji Xie
2021-08-04 8:30 ` Jason Wang
2021-08-04 8:30 ` Jason Wang
2021-08-04 8:30 ` Jason Wang
2021-07-29 7:34 ` [PATCH v10 05/17] vhost-vdpa: Fail the vhost_vdpa_set_status() on reset failure Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 8:10 ` Jason Wang
2021-08-03 8:10 ` Jason Wang
2021-08-03 8:10 ` Jason Wang
2021-08-03 9:50 ` Yongji Xie
2021-08-03 9:50 ` Yongji Xie
2021-08-04 8:33 ` Jason Wang
2021-08-04 8:33 ` Jason Wang
2021-08-04 8:33 ` Jason Wang
2021-07-29 7:34 ` [PATCH v10 06/17] vhost-vdpa: Handle the failure of vdpa_reset() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 07/17] virtio: Don't set FAILED status bit on device index allocation failure Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 8:02 ` Jason Wang
2021-08-03 8:02 ` Jason Wang
2021-08-03 8:02 ` Jason Wang
2021-08-03 9:17 ` Yongji Xie
2021-08-03 9:17 ` Yongji Xie
2021-07-29 7:34 ` [PATCH v10 08/17] virtio_config: Add a return value to reset function Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 09/17] virtio-vdpa: Handle the failure of vdpa_reset() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 10/17] virtio: Handle device reset failure in register_virtio_device() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-08-03 8:09 ` Jason Wang
2021-08-03 8:09 ` Jason Wang
2021-08-03 8:09 ` Jason Wang
2021-08-03 9:38 ` Yongji Xie
2021-08-03 9:38 ` Yongji Xie
2021-08-04 8:32 ` Jason Wang
2021-08-04 8:32 ` Jason Wang
2021-08-04 8:32 ` Jason Wang
2021-08-04 8:50 ` Yongji Xie
2021-08-04 8:50 ` Yongji Xie
2021-08-04 8:54 ` Jason Wang
2021-08-04 8:54 ` Jason Wang
2021-08-04 8:54 ` Jason Wang
2021-08-04 9:07 ` Yongji Xie
2021-08-04 9:07 ` Yongji Xie
2021-08-05 7:12 ` Jason Wang
2021-08-05 7:12 ` Jason Wang
2021-08-05 7:12 ` Jason Wang
2021-07-29 7:34 ` [PATCH v10 11/17] vhost-iotlb: Add an opaque pointer for vhost IOTLB Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 12/17] vdpa: Add an opaque pointer for vdpa_config_ops.dma_map() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:34 ` [PATCH v10 13/17] vdpa: factor out vhost_vdpa_pa_map() and vhost_vdpa_pa_unmap() Xie Yongji
2021-07-29 7:34 ` Xie Yongji
2021-07-29 7:35 ` [PATCH v10 14/17] vdpa: Support transferring virtual addressing during DMA mapping Xie Yongji
2021-07-29 7:35 ` Xie Yongji
2021-07-29 7:35 ` [PATCH v10 15/17] vduse: Implement an MMU-based software IOTLB Xie Yongji
2021-07-29 7:35 ` Xie Yongji
2021-07-29 7:35 ` [PATCH v10 16/17] vduse: Introduce VDUSE - vDPA Device in Userspace Xie Yongji
2021-07-29 7:35 ` Xie Yongji
2021-07-29 9:00 ` Greg KH
2021-07-29 9:00 ` Greg KH
2021-07-29 9:00 ` Greg KH
2021-07-29 9:57 ` Yongji Xie
2021-07-29 9:57 ` Yongji Xie
2021-08-03 7:30 ` Jason Wang
2021-08-03 7:30 ` Jason Wang
2021-08-03 7:30 ` Jason Wang
2021-08-03 8:39 ` Yongji Xie
2021-08-03 8:39 ` Yongji Xie
2021-07-29 7:35 ` [PATCH v10 17/17] Documentation: Add documentation for VDUSE Xie Yongji
2021-07-29 7:35 ` Xie Yongji
2021-08-03 7:35 ` Jason Wang
2021-08-03 7:35 ` Jason Wang
2021-08-03 7:35 ` Jason Wang
2021-08-03 8:52 ` Yongji Xie
2021-08-03 8:52 ` Yongji Xie
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