+struct ceph_aio_request {
+ struct kiocb *iocb;
+ size_t total_len;
+ int write;
+ int error;
+ struct list_head osd_reqs;
+ unsigned num_reqs;
+ atomic_t pending_reqs;
+ struct ceph_cap_flush *prealloc_cf;
+};
+
+static void ceph_aio_complete(struct inode *inode,
+ struct ceph_aio_request *aio_req)
+{
+ struct ceph_inode_info *ci = ceph_inode(inode);
+ int ret;
+
+ if (!atomic_dec_and_test(&aio_req->pending_reqs))
+ return;
+
+ ret = aio_req->error;
+ if (!ret)
+ ret = aio_req->total_len;
+
+ dout("ceph_aio_complete %p rc %d\n", inode, ret);
+
+ if (ret >= 0 && aio_req->write) {
+ int dirty;
+
+ loff_t endoff = aio_req->iocb->ki_pos + aio_req->total_len;
+ if (endoff > i_size_read(inode)) {
+ if (ceph_inode_set_size(inode, endoff))
+ ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL);
+ }
+
+ spin_lock(&ci->i_ceph_lock);
+ ci->i_inline_version = CEPH_INLINE_NONE;
+ dirty = __ceph_mark_dirty_caps(ci, CEPH_CAP_FILE_WR,
+ &aio_req->prealloc_cf);
+ spin_unlock(&ci->i_ceph_lock);
+ if (dirty)
+ __mark_inode_dirty(inode, dirty);
+
+ }
+
+ ceph_put_cap_refs(ci, (aio_req->write ? CEPH_CAP_FILE_WR :
+ CEPH_CAP_FILE_RD));
+
+ aio_req->iocb->ki_complete(aio_req->iocb, ret, 0);
+
+ ceph_free_cap_flush(aio_req->prealloc_cf);
+ kfree(aio_req);
+}
+
+static void ceph_aio_complete_req(struct ceph_osd_request *req,
+ struct ceph_msg *msg)
+{
+ int rc = req->r_result;
+ struct inode *inode = req->r_inode;
+ struct ceph_aio_request *aio_req = req->r_priv;
+ struct ceph_osd_data *osd_data = osd_req_op_extent_osd_data(req, 0);
+ int num_pages = calc_pages_for((u64)osd_data->alignment,
+ osd_data->length);
+
+ dout("ceph_aio_complete_req %p rc %d bytes %llu\n",
+ inode, rc, osd_data->length);
+
+ if (rc == -EOLDSNAPC) {
+ BUG_ON(1);
+ }
+
+ if (!aio_req->write) {
+ if (rc == -ENOENT)
+ rc = 0;
+ if (rc >= 0 && osd_data->length > rc) {
+ int zoff = osd_data->alignment + rc;
+ int zlen = osd_data->length - rc;
+ /*
+ * If read is satisfied by single OSD request,
+ * it can pass EOF. Otherwise read is within
+ * i_size.
+ */
+ if (aio_req->num_reqs == 1) {
+ loff_t i_size = i_size_read(inode);
+ loff_t endoff = aio_req->iocb->ki_pos + rc;
+ if (endoff < i_size)
+ zlen = min_t(size_t, zlen,
+ i_size - endoff);
+ aio_req->total_len = rc + zlen;
+ }
+
+ if (zlen > 0)
+ ceph_zero_page_vector_range(zoff, zlen,
+ osd_data->pages);
+ }
+ }
+
+ ceph_put_page_vector(osd_data->pages, num_pages, false);
+ ceph_osdc_put_request(req);
+
+ if (rc < 0)
+ cmpxchg(&aio_req->error, 0, rc);
+
+ ceph_aio_complete(inode, aio_req);
+ return;
+}
+