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iovec: redo iovec_iterator_next_page

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Matheus
2024-09-21 12:57:07 -03:00
parent 15f2cd0cc5
commit 01c883917f
2 changed files with 14 additions and 9 deletions
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kernel-src/io/iovec.c
+11 -7
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@@ -224,19 +224,23 @@ size_t iovec_iterator_read_from_ringbuffer(iovec_iterator_t *iovec_iterator, rin
return done;
}
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, void **page) {
int iovec_iterator_next_page(iovec_iterator_t *iovec_iterator, size_t *page_offset, size_t *page_remaining, void **page) {
void *addr = (void *)((uintptr_t)iovec_iterator->current->addr + iovec_iterator->current_offset);
if ((uintptr_t)addr % PAGE_SIZE)
return EINVAL;
size_t offset_in_page = ((uintptr_t)addr % PAGE_SIZE);
size_t remaining = iovec_iterator->current->len - iovec_iterator->current_offset;
if (remaining < PAGE_SIZE)
return EINVAL;
void *phys = vmm_getphysical(addr, true);
if (remaining == 0) {
*page = NULL;
return 0;
}
void *phys = vmm_getphysical((void *)((uintptr_t)addr - offset_in_page), true);
if (phys == NULL)
return EFAULT;
*page_offset = offset_in_page;
*page_remaining = min(PAGE_SIZE, remaining);
*page = phys;
iovec_iterator_skip(iovec_iterator, *page_remaining);
return 0;
}