csum_and_copy_from_iter_full

Name:csum_and_copy_from_iter_full

Proto:bool csum_and_copy_from_iter_full(void *addr, size_t bytes, __wsum *csum, struct iov_iter *i)

Type:bool

Parameter:

Type	Parameter	Name
void *	addr
size_t	bytes
__wsum *	csum
struct iov_iter *	i

1481

to = addr

1483

off = 0

1484

sum = csum

1485

If Value for the false possibility is greater at compile time(iov_iter_is_pipe(i) || iov_iter_is_discard(i)) Then

1486

1487

Return false

1489

If Value for the false possibility is greater at compile time(count < bytes) Then Return false

1491

iterate_all_kinds(i, bytes, v, ({interr = 0;next = csum_and_copy_from_user(iov_base, (to += iov_len) - iov_len, iov_len, 0, & err);If err Then Return false;sum = csum_block_add(sum, next, off);off += iov_len;0;}), ({char * p = kmap_atomic(bv_page);sum = csum_and_memcpy((to += bv_len) - bv_len, p + bv_offset, bv_len, sum, off);Prevent people trying to call kunmap_atomic() as if it were kunmap()* kunmap_atomic() should get the return value of kmap_atomic, not the page.(p);off += bv_len;}), ({sum = csum_and_memcpy((to += iov_len) - iov_len, iov_base, iov_len, sum, off);off += iov_len;}))

1515

csum = sum

1516

iov_iter_advance(i, bytes)

1517

Return true

**Caller**
Name	Describe
skb_add_data
skb_do_copy_data_nocache

Source code conversion tool public plug-in interface	X
Support c/c++/esqlc/java Oracle/Informix/Mysql Plug-in can realize: logical Report Code generation and batch code conversion