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file: remove __receive_fd()

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Honestly, there's little value in having a helper with and without that
int __user *ufd argument. It's just messy and doesn't really give us
anything. Just expose receive_fd() with that argument and get rid of
that helper.

Link: https://lore.kernel.org/r/20231130-vfs-files-fixes-v1-5-e73ca6f4ea83@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2023-11-30 13:49:11 +01:00
parent eac9189c96
commit 4e94ddfe2a
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
6 changed files with 8 additions and 16 deletions
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2
drivers/vdpa/vdpa_user/vduse_dev.c
View File

@ -1157,7 +1157,7 @@ static long vduse_dev_ioctl(struct file *file, unsigned int cmd,
fput(f);
break;
}
ret = receive_fd(f, perm_to_file_flags(entry.perm));
ret = receive_fd(f, NULL, perm_to_file_flags(entry.perm));
fput(f);
break;
}

11
fs/file.c
View File

@ -1296,7 +1296,7 @@ out_unlock:
}
/**
* __receive_fd() - Install received file into file descriptor table
* receive_fd() - Install received file into file descriptor table
* @file: struct file that was received from another process
* @ufd: __user pointer to write new fd number to
* @o_flags: the O_* flags to apply to the new fd entry
@ -1310,7 +1310,7 @@ out_unlock:
*
* Returns newly install fd or -ve on error.
*/
int __receive_fd(struct file *file, int __user *ufd, unsigned int o_flags)
int receive_fd(struct file *file, int __user *ufd, unsigned int o_flags)
{
int new_fd;
int error;
@ -1335,6 +1335,7 @@ int __receive_fd(struct file *file, int __user *ufd, unsigned int o_flags)
__receive_sock(file);
return new_fd;
}
EXPORT_SYMBOL_GPL(receive_fd);
int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags)
{
@ -1350,12 +1351,6 @@ 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;

5
include/linux/file.h
View File

@ -96,10 +96,7 @@ DEFINE_CLASS(get_unused_fd, int, if (_T >= 0) put_unused_fd(_T),
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);
int receive_fd(struct file *file, int __user *ufd, unsigned int o_flags);
int receive_fd_replace(int new_fd, struct file *file, unsigned int o_flags);

2
include/net/scm.h
View File

@ -214,7 +214,7 @@ static inline int scm_recv_one_fd(struct file *f, int __user *ufd,
{
if (!ufd)
return -EFAULT;
return __receive_fd(f, ufd, flags);
return receive_fd(f, ufd, flags);
}
#endif /* __LINUX_NET_SCM_H */

2
kernel/pid.c
View File

@ -700,7 +700,7 @@ static int pidfd_getfd(struct pid *pid, int fd)
if (IS_ERR(file))
return PTR_ERR(file);
ret = receive_fd(file, O_CLOEXEC);
ret = receive_fd(file, NULL, O_CLOEXEC);
fput(file);
return ret;

2
kernel/seccomp.c
View File

@ -1072,7 +1072,7 @@ static void seccomp_handle_addfd(struct seccomp_kaddfd *addfd, struct seccomp_kn
*/
list_del_init(&addfd->list);
if (!addfd->setfd)
fd = receive_fd(addfd->file, addfd->flags);
fd = receive_fd(addfd->file, NULL, addfd->flags);
else
fd = receive_fd_replace(addfd->fd, addfd->file, addfd->flags);
addfd->ret = fd;