fs/ceph/file.c

72  *    user pages directly.
74  * fsync() flushes and waits on dirty pages, but just queues metadata
80  * How many pages to get in one call to iov_iter_get_pages().  This
95 		struct page *pages[ITER_GET_BVECS_PAGES];
100 		bytes = iov_iter_get_pages2(iter, pages, maxsize - size,
110 			bvec_set_page(&bvecs[bvec_idx], pages[idx], len, start);
124  * Attempt to get up to @maxsize bytes worth of pages from @iter.
150 		 * No pages were pinned -- just free the array.
978  * buffer to osd, or directly to user pages (if O_DIRECT).
1010 	 * flush any page cache pages in this range.  this
1023 		struct page **pages;
1059 		pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1060 		if (IS_ERR(pages)) {
1062 			ret = PTR_ERR(pages);
1066 		osd_req_op_extent_osd_data_pages(req, 0, pages, read_len,
1104 			fret = ceph_fscrypt_decrypt_extents(inode, pages,
1136 			ceph_zero_page_vector_range(zoff, zlen, pages);
1151 			SetPageUptodate(pages[idx]);
1152 			copied = copy_page_to_iter(pages[idx++],
1162 		ceph_release_page_vector(pages, num_pages);
1525 			 * throw out any page cache pages in this range. this
1642  * Synchronous write, straight from __user pointer or user pages.
1659 	struct page **pages;
1722 		 * in an array of pagecache pages.
1725 		pages = ceph_alloc_page_vector(num_pages, GFP_KERNEL);
1726 		if (IS_ERR(pages)) {
1727 			ret = PTR_ERR(pages);
1731 		/* Do we need to preload the pages? */
1756 				ceph_release_page_vector(pages, num_pages);
1764 				ceph_release_page_vector(pages, num_pages);
1773 				osd_req_op_extent_osd_data_pages(req, 0, pages,
1781 					ceph_release_page_vector(pages, num_pages);
1801 					ceph_release_page_vector(pages, num_pages);
1806 							&pages[num_pages - 1],
1833 				 * first and last pages.
1836 					zero_user_segment(pages[0], 0,
1839 					zero_user_segment(pages[num_pages - 1],
1845 					ceph_release_page_vector(pages, num_pages);
1852 						zero_user_segment(pages[0], 0,
1855 						zero_user_segment(pages[num_pages - 1],
1863 					ceph_release_page_vector(pages, num_pages);
1870 						zero_user_segment(pages[num_pages - 1],
1878 						ceph_release_page_vector(pages, num_pages);
1890 							pages[0], CEPH_FSCRYPT_BLOCK_SIZE,
1894 						ceph_release_page_vector(pages, num_pages);
1900 							pages[num_pages - 1],
1905 						ceph_release_page_vector(pages, num_pages);
1918 			ret = copy_page_from_iter(pages[n], off, plen, from);
1928 			ceph_release_page_vector(pages, num_pages);
1933 			ret = ceph_fscrypt_encrypt_pages(inode, pages,
1938 				ceph_release_page_vector(pages, num_pages);
1952 			ceph_release_page_vector(pages, num_pages);
1957 		osd_req_op_extent_osd_data_pages(req, rmw ? 1 : 0, pages, write_len,
2988 	/* Drop dst file cached pages */
2994 		doutc(cl, "Failed to invalidate inode pages (%zd)\n",