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@@ -954,3 +954,47 @@ void fscache_mark_pages_cached(struct fscache_retrieval *op,
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pagevec_reinit(pagevec);
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}
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EXPORT_SYMBOL(fscache_mark_pages_cached);
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+
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+/*
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+ * Uncache all the pages in an inode that are marked PG_fscache, assuming them
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+ * to be associated with the given cookie.
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+ */
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+void __fscache_uncache_all_inode_pages(struct fscache_cookie *cookie,
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+ struct inode *inode)
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+{
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+ struct address_space *mapping = inode->i_mapping;
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+ struct pagevec pvec;
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+ pgoff_t next;
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+ int i;
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+
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+ _enter("%p,%p", cookie, inode);
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+
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+ if (!mapping || mapping->nrpages == 0) {
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+ _leave(" [no pages]");
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+ return;
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+ }
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+
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+ pagevec_init(&pvec, 0);
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+ next = 0;
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+ while (next <= (loff_t)-1 &&
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+ pagevec_lookup(&pvec, mapping, next, PAGEVEC_SIZE)
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+ ) {
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+ for (i = 0; i < pagevec_count(&pvec); i++) {
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+ struct page *page = pvec.pages[i];
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+ pgoff_t page_index = page->index;
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+
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+ ASSERTCMP(page_index, >=, next);
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+ next = page_index + 1;
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+
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+ if (PageFsCache(page)) {
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+ __fscache_wait_on_page_write(cookie, page);
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+ __fscache_uncache_page(cookie, page);
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+ }
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+ }
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+ pagevec_release(&pvec);
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+ cond_resched();
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+ }
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+
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+ _leave("");
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+}
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+EXPORT_SYMBOL(__fscache_uncache_all_inode_pages);
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David Howells