1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copryright (C) 2001 Cluster File Systems, Inc.
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * Author Peter Braam <braam@clusterfs.com>
11 * This server is single threaded at present (but can easily be multi
12 * threaded). For testing and management it is treated as an
13 * obd_device, although it does not export a full OBD method table
14 * (the requests are coming in over the wire, so object target
15 * modules do not have a full method table.)
21 #include <linux/config.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
25 #include <linux/string.h>
26 #include <linux/stat.h>
27 #include <linux/errno.h>
28 #include <linux/locks.h>
29 #include <linux/unistd.h>
31 #include <asm/system.h>
32 #include <asm/uaccess.h>
35 #include <linux/stat.h>
36 #include <asm/uaccess.h>
37 #include <asm/segment.h>
38 #include <linux/miscdevice.h>
40 #define DEBUG_SUBSYSTEM S_OSC
42 #include <linux/obd_support.h>
43 #include <linux/obd_class.h>
44 #include <linux/lustre_lib.h>
45 #include <linux/lustre_idl.h>
47 struct ptlrpc_client *osc_con2cl(struct obd_conn *conn)
49 struct osc_obd *osc = &conn->oc_dev->u.osc;
50 return &osc->osc_peer;
54 static int osc_connect(struct obd_conn *conn)
56 struct ptlrpc_request *request;
57 struct ptlrpc_client *peer = osc_con2cl(conn);
61 request = ptlrpc_prep_req(peer, OST_CONNECT, 0, NULL, 0, NULL);
63 CERROR("cannot pack req!\n");
68 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
70 rc = ptlrpc_queue_wait(peer, request);
76 CDEBUG(D_INODE, "received connid %d\n", request->rq_rep.ost->connid);
78 conn->oc_id = request->rq_rep.ost->connid;
80 ptlrpc_free_req(request);
85 static int osc_disconnect(struct obd_conn *conn)
87 struct ptlrpc_request *request;
88 struct ptlrpc_client *peer = osc_con2cl(conn);
92 request = ptlrpc_prep_req(peer, OST_DISCONNECT, 0, NULL, 0, NULL);
94 CERROR("cannot pack req!\n");
97 request->rq_req.ost->connid = conn->oc_id;
99 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
101 rc = ptlrpc_queue_wait(peer, request);
107 ptlrpc_free_req(request);
113 static int osc_getattr(struct obd_conn *conn, struct obdo *oa)
115 struct ptlrpc_request *request;
116 struct ptlrpc_client *peer = osc_con2cl(conn);
119 request = ptlrpc_prep_req(peer, OST_GETATTR, 0, NULL, 0, NULL);
121 CERROR("cannot pack req!\n");
125 memcpy(&request->rq_req.ost->oa, oa, sizeof(*oa));
126 request->rq_req.ost->oa.o_valid = ~0;
128 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
130 rc = ptlrpc_queue_wait(peer, request);
136 CDEBUG(D_INODE, "mode: %o\n", request->rq_rep.ost->oa.o_mode);
138 memcpy(oa, &request->rq_rep.ost->oa, sizeof(*oa));
142 ptlrpc_free_req(request);
146 static int osc_setattr(struct obd_conn *conn, struct obdo *oa)
148 struct ptlrpc_request *request;
149 struct ptlrpc_client *peer = osc_con2cl(conn);
152 request = ptlrpc_prep_req(peer, OST_SETATTR, 0, NULL, 0, NULL);
154 CERROR("cannot pack req!\n");
158 memcpy(&request->rq_req.ost->oa, oa, sizeof(*oa));
160 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
162 rc = ptlrpc_queue_wait(peer, request);
169 ptlrpc_free_req(request);
173 static int osc_create(struct obd_conn *conn, struct obdo *oa)
175 struct ptlrpc_request *request;
176 struct ptlrpc_client *peer = osc_con2cl(conn);
182 request = ptlrpc_prep_req(peer, OST_CREATE, 0, NULL, 0, NULL);
184 CERROR("cannot pack req!\n");
188 memcpy(&request->rq_req.ost->oa, oa, sizeof(*oa));
189 request->rq_req.ost->connid = conn->oc_id;
190 request->rq_req.ost->oa.o_valid = ~0;
192 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
194 rc = ptlrpc_queue_wait(peer, request);
199 memcpy(oa, &request->rq_rep.ost->oa, sizeof(*oa));
202 ptlrpc_free_req(request);
206 static int osc_punch(struct obd_conn *conn, struct obdo *oa, obd_size count,
209 struct ptlrpc_request *request;
210 struct ptlrpc_client *peer = osc_con2cl(conn);
216 request = ptlrpc_prep_req(peer, OST_PUNCH, 0, NULL, 0, NULL);
218 CERROR("cannot pack req!\n");
222 memcpy(&request->rq_req.ost->oa, oa, sizeof(*oa));
223 request->rq_req.ost->oa.o_valid = ~0;
224 request->rq_req.ost->oa.o_size = offset;
225 request->rq_req.ost->oa.o_blocks = count;
227 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
229 rc = ptlrpc_queue_wait(peer, request);
234 memcpy(oa, &request->rq_rep.ost->oa, sizeof(*oa));
237 ptlrpc_free_req(request);
241 static int osc_destroy(struct obd_conn *conn, struct obdo *oa)
243 struct ptlrpc_request *request;
244 struct ptlrpc_client *peer = osc_con2cl(conn);
250 request = ptlrpc_prep_req(peer, OST_DESTROY, 0, NULL, 0, NULL);
252 CERROR("cannot pack req!\n");
256 memcpy(&request->rq_req.ost->oa, oa, sizeof(*oa));
257 request->rq_req.ost->oa.o_valid = ~0;
259 sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
261 rc = ptlrpc_queue_wait(peer, request);
266 memcpy(oa, &request->rq_rep.ost->oa, sizeof(*oa));
269 ptlrpc_free_req(request);
273 int osc_sendpage(struct obd_conn *conn, struct ptlrpc_request *req,
274 struct niobuf *dst, struct niobuf *src)
276 struct ptlrpc_client *cl = osc_con2cl(conn);
280 memcpy((char *)(unsigned long)dst->addr,
281 (char *)(unsigned long)src->addr, src->len);
283 struct ptlrpc_bulk_desc *bulk;
286 bulk = ptlrpc_prep_bulk(&cl->cli_server);
290 bulk->b_buf = (void *)(unsigned long)src->addr;
291 bulk->b_buflen = src->len;
292 bulk->b_xid = dst->xid;
293 rc = ptlrpc_send_bulk(bulk, OSC_BULK_PORTAL);
295 CERROR("send_bulk failed: %d\n", rc);
299 wait_event_interruptible(bulk->b_waitq,
300 ptlrpc_check_bulk_sent(bulk));
302 if (bulk->b_flags == PTL_RPC_INTR) {
304 /* FIXME: hey hey, we leak here. */
308 OBD_FREE(bulk, sizeof(*bulk));
314 int osc_brw_read(struct obd_conn *conn, obd_count num_oa, struct obdo **oa,
315 obd_count *oa_bufs, struct page **buf, obd_size *count,
316 obd_off *offset, obd_flag *flags)
318 struct ptlrpc_client *cl = osc_con2cl(conn);
319 struct ptlrpc_request *request;
322 struct obd_ioobj ioo;
324 int size1, size2 = 0;
327 struct ptlrpc_bulk_desc **bulk;
329 size1 = num_oa * sizeof(ioo);
331 for (i = 0; i < num_oa; i++)
333 size2 = pages * sizeof(src);
335 request = ptlrpc_prep_req(cl, OST_BRW, size1, NULL, size2, NULL);
337 CERROR("cannot pack req!\n");
340 request->rq_req.ost->cmd = OBD_BRW_READ;
342 OBD_ALLOC(bulk, pages * sizeof(struct ptlrpc_bulk_desc *));
344 CERROR("cannot alloc bulk desc vector\n");
347 memset(bulk, 0, pages * sizeof(struct ptlrpc_bulk_desc *));
350 ptr1 = ost_req_buf1(request->rq_req.ost);
351 ptr2 = ost_req_buf2(request->rq_req.ost);
352 for (i = 0; i < num_oa; i++) {
353 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
354 for (j = 0; j < oa_bufs[i]; j++) {
355 bulk[n] = ptlrpc_prep_bulk(&cl->cli_server);
356 if (bulk[n] == NULL) {
357 CERROR("cannot alloc bulk desc\n");
362 spin_lock(&cl->cli_lock);
363 bulk[n]->b_xid = cl->cli_xid++;
364 spin_unlock(&cl->cli_lock);
365 bulk[n]->b_buf = kmap(buf[n]);
366 bulk[n]->b_buflen = PAGE_SIZE;
367 bulk[n]->b_portal = OST_BULK_PORTAL;
368 ost_pack_niobuf(&ptr2, bulk[n]->b_buf, offset[n],
369 count[n], flags[n], bulk[n]->b_xid);
371 rc = ptlrpc_register_bulk(bulk[n]);
378 request->rq_replen = sizeof(struct ptlrep_hdr) + sizeof(struct ost_rep);
379 rc = ptlrpc_queue_wait(cl, request);
382 /* FIXME: if we've called ptlrpc_wait_bulk but rc != 0, we need to
383 * abort those bulk listeners. */
386 for (i = 0; i < num_oa; i++) {
387 for (j = 0; j < oa_bufs[i]; j++) {
391 OBD_FREE(bulk[n], sizeof(struct ptlrpc_bulk_desc));
396 OBD_FREE(bulk, pages * sizeof(struct ptlrpc_bulk_desc *));
397 ptlrpc_free_req(request);
401 int osc_brw_write(struct obd_conn *conn, obd_count num_oa, struct obdo **oa,
402 obd_count *oa_bufs, struct page **buf, obd_size *count,
403 obd_off *offset, obd_flag *flags)
405 struct ptlrpc_client *cl = osc_con2cl(conn);
406 struct ptlrpc_request *request;
407 struct obd_ioobj ioo;
409 int pages, rc, i, j, n, size1, size2 = 0;
412 size1 = num_oa * sizeof(ioo);
414 for (i = 0; i < num_oa; i++)
416 size2 = pages * sizeof(*src);
418 OBD_ALLOC(src, size2);
420 CERROR("no src memory\n");
423 memset((char *)src, 0, size2);
425 request = ptlrpc_prep_req(cl, OST_BRW, size1, NULL, size2, NULL);
427 CERROR("cannot pack req!\n");
430 request->rq_req.ost->cmd = OBD_BRW_WRITE;
433 ptr1 = ost_req_buf1(request->rq_req.ost);
434 ptr2 = ost_req_buf2(request->rq_req.ost);
435 for (i = 0; i < num_oa; i++) {
436 ost_pack_ioo(&ptr1, oa[i], oa_bufs[i]);
437 for (j = 0; j < oa_bufs[i]; j++) {
438 ost_pack_niobuf(&ptr2, kmap(buf[n]), offset[n],
439 count[n], flags[n], 0);
443 memcpy((char *)src, (char *)ost_req_buf2(request->rq_req.ost), size2);
445 request->rq_replen = sizeof(struct ptlrep_hdr) +
446 sizeof(struct ost_rep) + pages * sizeof(struct niobuf);
447 rc = ptlrpc_queue_wait(cl, request);
453 ptr2 = ost_rep_buf2(request->rq_rep.ost);
454 if (request->rq_rep.ost->buflen2 != n * sizeof(struct niobuf)) {
455 CERROR("buffer length wrong (%d vs. %d)\n",
456 request->rq_rep.ost->buflen2, n * sizeof(struct niobuf));
462 for (i = 0; i < num_oa; i++) {
463 for (j = 0; j < oa_bufs[i]; j++) {
465 ost_unpack_niobuf(&ptr2, &dst);
466 osc_sendpage(conn, request, dst, &src[n]);
470 OBD_FREE(src, size2);
473 for (i = 0; i < num_oa; i++) {
474 for (j = 0; j < oa_bufs[i]; j++) {
480 ptlrpc_free_req(request);
484 int osc_brw(int rw, struct obd_conn *conn, obd_count num_oa,
485 struct obdo **oa, obd_count *oa_bufs, struct page **buf,
486 obd_size *count, obd_off *offset, obd_flag *flags)
488 if (rw == OBD_BRW_READ) {
489 return osc_brw_read(conn, num_oa, oa, oa_bufs, buf, count,
492 return osc_brw_write(conn, num_oa, oa, oa_bufs, buf, count,
497 /* mount the file system (secretly) */
498 static int osc_setup(struct obd_device *obddev, obd_count len,
502 struct osc_obd *osc = &obddev->u.osc;
503 struct obd_ioctl_data *data = (struct obd_ioctl_data *)buf;
505 int dev = data->ioc_dev;
508 rc = ptlrpc_connect_client(dev, "ost",
520 static int osc_cleanup(struct obd_device * obddev)
526 struct obd_ops osc_obd_ops = {
528 o_cleanup: osc_cleanup,
529 o_create: osc_create,
530 o_destroy: osc_destroy,
531 o_getattr: osc_getattr,
532 o_setattr: osc_setattr,
533 o_connect: osc_connect,
534 o_disconnect: osc_disconnect,
539 static int __init osc_init(void)
541 obd_register_type(&osc_obd_ops, LUSTRE_OSC_NAME);
545 static void __exit osc_exit(void)
547 obd_unregister_type(LUSTRE_OSC_NAME);
550 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
551 MODULE_DESCRIPTION("Lustre Object Storage Client (OSC) v1.0");
552 MODULE_LICENSE("GPL");
554 module_init(osc_init);
555 module_exit(osc_exit);