XDR_SKB_READ_BITS(9) Linux Networking XDR_SKB_READ_BITS(9)NAME
xdr_skb_read_bits - copy some data bits from skb to internal buffer
size_t xdr_skb_read_bits(struct xdr_skb_reader * desc, void * to, size_t len);
sk_buff copy helper
number of bytes to copy
Possibly called several times to iterate over an sk_buff and copy data out of it.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 XDR_SKB_READ_BITS(9)
Check Out this Related Man Page
COPY(9) BSD Kernel Developer's Manual COPY(9)NAME
copy, copyin, copyinstr, copyout, copystr -- kernel copy functions
copyin(const void *uaddr, void *kaddr, size_t len);
copyinstr(const void *uaddr, void *kaddr, size_t len, size_t *done);
copyout(const void *kaddr, void *uaddr, size_t len);
copystr(const void *kfaddr, void *kdaddr, size_t len, size_t *done);
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 to the kernel-space address kaddr.
copyinstr() Copies a NUL-terminated string, at most len bytes long, from user-space address uaddr to kernel-space address kaddr. The num-
ber of bytes actually copied, including the terminating NUL, is returned in *done.
copyout() Copies len bytes of data from the kernel-space address kaddr to the user-space address uaddr.
copystr() Copies a NUL-terminated string, at most len bytes long, from kernel-space address kfaddr to kernel-space address kdaddr. The
number of bytes actually copied, including the terminating NUL, is returned in *done.
The copy functions return 0 on success or the following error on failure:
[EFAULT] If a bad address is encountered. When this error is returned, the contents of the destination buffer ( *kaddr for
copyin(), copyinstr(), and copystr(); *uaddr for copyout()) are undefined. For copyinstr() and copystr(), the contents of
the *done parameter are also undefined on a return of EFAULT.
In addition to EFAULT, copystr() and copyinstr() on failure will return:
[ENAMETOLONG] When the string is longer than len bytes. On this error return, the destination buffer is not null-terminated, but the
*done parameter is maintained.
SEE ALSO fetch(9), store(9)BSD October 2, 2008 BSD
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