COPY_FROM_USER_TOIO(9) Sound Devices COPY_FROM_USER_TOIO(9)NAME
copy_from_user_toio - copy data from user-space to mmio-space
SYNOPSIS
int copy_from_user_toio(volatile void __iomem * dst, const void __user * src, size_t count);
ARGUMENTS
dst
the destination pointer on mmio-space
src
the source pointer on user-space
count
the data size to copy in bytes
DESCRIPTION
Copies the data from user-space to mmio-space.
Returns zero if successful, or non-zero on failure.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 COPY_FROM_USER_TOIO(9)
Check Out this Related Man Page
COPY(9) BSD Kernel Developer's Manual COPY(9)NAME
copy, copyin, copyout, copystr, copyinstr, copyoutstr -- kernel space to/from user space copy functions
SYNOPSIS
#include <sys/types.h>
#include <sys/systm.h>
int
copyin(const void *uaddr, void *kaddr, size_t len);
int
copyout(const void *kaddr, void *uaddr, size_t len);
int
copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
int
copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done);
int
copyoutstr(const void *kaddr, void *uaddr, size_t len, size_t *done);
int
copyin_proc(struct proc *p, const void *uaddr, void *kaddr, size_t len);
int
copyout_proc(struct proc *p, const void *kaddr, void *uaddr, size_t len);
int
ioctl_copyin(int ioctlflags, const void *src, void *dst, size_t len);
int
ioctl_copyout(int ioctlflags, const void *src, void *dst, size_t len);
DESCRIPTION
The copy functions are designed to copy contiguous data from one address to another. All but copystr() copy data from user-space to kernel-
space or vice-versa.
The copy routines provide the following functionality:
copyin() Copies len bytes of data from the user-space address uaddr in the current process to the kernel-space address kaddr.
copyout() Copies len bytes of data from the kernel-space address kaddr to the user-space address uaddr in the current process.
copystr() Copies a NUL-terminated string, at most len bytes long, from kernel-space address kfaddr to kernel-space address kdaddr. If
the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is returned in *done.
copyinstr() Copies a NUL-terminated string, at most len bytes long, from user-space address uaddr in the current process to kernel-space
address kaddr. If the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is
returned in *done.
copyoutstr() Copies a NUL-terminated string, at most len bytes long, from kernel-space address kaddr to user-space address uaddr in the
current process. If the done argument is non-NULL, the number of bytes actually copied, including the terminating NUL, is
returned in *done.
copyin_proc() Like copyin(), except it operates on the address space of the process p.
copyout_proc() Like copyout(), except it operates on the address space of the process p.
ioctl_copyin() Like copyin(), except it operates on kernel adresses when the FKIOCTL flag is passed in ioctlflags from the ioctl call.
ioctl_copyout()
Like copyout(), except it operates on kernel adresses when the FKIOCTL flag is passed in ioctlflags from the ioctl call.
RETURN VALUES
The copy functions return 0 on success or EFAULT if a bad address is encountered. In addition, the copystr(), copyinstr(), and copyoutstr()
functions return ENAMETOOLONG if the string is longer than len bytes.
SEE ALSO fetch(9), store(9)BSD August 28, 2005 BSD
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