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@@ -16,22 +16,30 @@ struct page **ceph_get_direct_page_vector(const char __user *data,
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int num_pages, bool write_page)
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{
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struct page **pages;
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- int rc;
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+ int got = 0;
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+ int rc = 0;
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pages = kmalloc(sizeof(*pages) * num_pages, GFP_NOFS);
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if (!pages)
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return ERR_PTR(-ENOMEM);
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down_read(¤t->mm->mmap_sem);
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- rc = get_user_pages(current, current->mm, (unsigned long)data,
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- num_pages, write_page, 0, pages, NULL);
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+ while (got < num_pages) {
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+ rc = get_user_pages(current, current->mm,
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+ (unsigned long)data + ((unsigned long)got * PAGE_SIZE),
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+ num_pages - got, write_page, 0, pages + got, NULL);
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+ if (rc < 0)
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+ break;
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+ BUG_ON(rc == 0);
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+ got += rc;
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+ }
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up_read(¤t->mm->mmap_sem);
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- if (rc < num_pages)
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+ if (rc < 0)
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goto fail;
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return pages;
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fail:
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- ceph_put_page_vector(pages, rc > 0 ? rc : 0, false);
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+ ceph_put_page_vector(pages, got, false);
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return ERR_PTR(rc);
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}
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EXPORT_SYMBOL(ceph_get_direct_page_vector);
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