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Commit febdd8a2 authored by Pavel Emelyanov's avatar Pavel Emelyanov
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page-read: Factor out PagemapEntry to iovec conversion 

Signed-off-by: 's avatarPavel Emelyanov <xemul@parallels.com>
parent 68bfaeb8
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Showing with 10 additions and 6 deletions
page-read.c
View file @ febdd8a2
......@@ -36,6 +36,12 @@ static int read_page(struct page_read *pr, unsigned long vaddr, void *buf)
return 1;
}
static inline void pagemap2iovec(PagemapEntry *pe, struct iovec *iov)
{
iov->iov_base = decode_pointer(pe->vaddr);
iov->iov_len = pe->nr_pages * PAGE_SIZE;
}
static int get_pagemap(struct page_read *pr, struct iovec *iov)
{
int ret;
......@@ -45,8 +51,7 @@ static int get_pagemap(struct page_read *pr, struct iovec *iov)
if (ret <= 0)
return ret;
iov->iov_base = decode_pointer(pe->vaddr);
iov->iov_len = pe->nr_pages * PAGE_SIZE;
pagemap2iovec(pe, iov);
pr->pe = pe;
pr->cvaddr = (unsigned long)iov->iov_base;
......@@ -82,10 +87,9 @@ static int read_pagemap_page_from_parent(struct page_read *pr, unsigned long vad
int ret;
struct iovec iov;
if (pr->pe) {
iov.iov_base = decode_pointer(pr->pe->vaddr);
iov.iov_len = pr->pe->nr_pages * PAGE_SIZE;
} else
if (pr->pe)
pagemap2iovec(pr->pe, &iov);
else
goto new_pagemap;
while (1) {
......
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