1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
6 * This code is issued under the GNU General Public License.
7 * See the file COPYING in this distribution
9 * These are the only exported functions, they provide some generic
10 * infrastructure for managing object devices
12 * Object Devices Class Driver
16 #include <linux/config.h> /* for CONFIG_PROC_FS */
17 #include <linux/module.h>
18 #include <linux/errno.h>
19 #include <linux/kernel.h>
20 #include <linux/major.h>
21 #include <linux/sched.h>
23 #include <linux/slab.h>
24 #include <linux/ioport.h>
25 #include <linux/fcntl.h>
26 #include <linux/delay.h>
27 #include <linux/skbuff.h>
28 #include <linux/proc_fs.h>
30 #include <linux/poll.h>
31 #include <linux/init.h>
32 #include <linux/list.h>
34 #include <asm/ioctls.h>
35 #include <asm/system.h>
37 #include <asm/uaccess.h>
38 #include <linux/miscdevice.h>
40 #define DEBUG_SUBSYSTEM S_CLASS
42 #include <linux/obd_support.h>
43 #include <linux/obd_class.h>
44 #include <linux/lustre_debug.h>
45 #include <linux/smp_lock.h>
46 #include <linux/lprocfs.h>
48 struct semaphore obd_conf_sem; /* serialize configuration commands */
49 struct obd_device obd_dev[MAX_OBD_DEVICES];
50 struct list_head obd_types;
51 unsigned long obd_memory;
53 /* The following are visible and mutable through /proc/sys/lustre/. */
54 unsigned long obd_fail_loc;
55 unsigned long obd_timeout = 100;
56 char obd_recovery_upcall[128] = "/usr/lib/lustre/ha_assist";
58 extern struct obd_type *class_nm_to_type(char *nm);
60 * LProcFS specific data structures. These define the namespace for
61 * the various device classes. We will need to distribute these
62 * later, to individual modules (e.g. MDS, MDC etc)
68 * Common SNMP namespace
71 char *snmp_dir_nm[] = {
77 lprocfs_vars_t snmp_var_nm[]={
78 {"uuid", rd_uuid, wr_uuid},
79 {"f_blocksize",rd_blksize, wr_other},
80 {"f_blockstotal",rd_blktotal, wr_other},
81 {"f_blocksfree",rd_blkfree, wr_other},
82 {"f_kbytesfree", rd_kbfree, wr_other},
83 {"f_objects", rd_numobjects, wr_other},
84 {"f_objectsfree", rd_objfree, wr_other},
85 {"f_objectgroups", rd_objgroups, wr_other},
93 * Common OBD namespace for lprocFS (these are used very often)
96 char* obd_dir_nm_1[]= {
105 lprocfs_vars_t obd_var_nm_1[]= {
106 {"num_ops", lprocfs_ll_rd, lprocfs_ll_wr},
107 {"min_time", lprocfs_ll_rd, lprocfs_ll_wr},
108 {"max_time", lprocfs_ll_rd, lprocfs_ll_wr},
109 {"sum_time", lprocfs_ll_rd, lprocfs_ll_wr},
115 * MDC Spcific namespace for lprocFS
118 char *mdc_dir_nm_1[]= {
137 * Create the MDC groupings
139 lprocfs_group_t lprocfs_mdc_nm[]= {
141 {obd_dir_nm_1, obd_var_nm_1, e_generic},
142 {mdc_dir_nm_1, obd_var_nm_1, e_generic},
143 {snmp_dir_nm, snmp_var_nm, e_specific},
148 * MDS Device Groupings
150 char *mds_dir_nm_1[]={
153 "disconnect_callback",
173 char *mds_dir_nm_2[]={
179 lprocfs_vars_t mds_var_nm_2[]={
180 {"f_type", rd_fs_type, wr_other},
181 {"f_bsize",rd_other, wr_other},
182 {"f_blocks",rd_other, wr_other},
183 {"f_bfree",rd_other, wr_other},
184 {"f_bavail",rd_other, wr_other},
185 {"uuid",rd_string, wr_string},
191 char *mds_snmp_dir_nm_1[] = {
197 lprocfs_vars_t mds_snmp_var_nm_1[] = {
198 {"f_fstype", rd_fs_type, wr_other},
199 {"f_files",rd_other, wr_other},
200 {"f_inodesfree",rd_other, wr_other},
201 {"f_filesets",rd_other, wr_other},
205 lprocfs_group_t lprocfs_mds_nm[]={
206 {obd_dir_nm_1, obd_var_nm_1, e_generic},
207 {mds_dir_nm_1, obd_var_nm_1, e_generic},
208 /* {mds_dir_nm_2, mds_var_nm_2, e_specific}, */
209 {snmp_dir_nm, snmp_var_nm, e_specific},
210 {mds_snmp_dir_nm_1, mds_snmp_var_nm_1, e_specific},
218 char* osc_dir_nm_1[]={
232 lprocfs_group_t lprocfs_osc_nm[]={
233 {obd_dir_nm_1, obd_var_nm_1, e_generic},
234 {osc_dir_nm_1, obd_var_nm_1, e_generic},
235 {snmp_dir_nm, snmp_var_nm, e_specific},
241 * OST, LOV, OBD_FILTER namespace
242 * Note: These namespaces are exactly similar to the osc_dir_namespace
243 * Hence, I use the osc namespace as the base class and add only
244 * those attributes that are missing in osc_dir_namespace.
247 char *ost_lov_obdfilter_dir_nm_1[]={
256 char *ost_lov_obdfilter_dir_nm_2[]={
261 lprocfs_vars_t ost_lov_obdfilter_var_nm_2[]={
262 {"f_type", rd_fs_type, wr_other},
263 {"f_bsize",rd_other, wr_other},
264 {"f_blocks",rd_other, wr_other},
265 {"f_bfree",rd_other, wr_other},
266 {"f_bavail",rd_other, wr_other},
267 {"f_objects", rd_other, wr_other},
268 {"f_ofree", rd_other, wr_other},
269 {"f_objectgroups", rd_other, wr_other},
270 {"f_uuid", rd_string, wr_string},
276 char* obdfilter_snmp_dir_nm_1[] = {
280 lprocfs_vars_t obdfilter_snmp_var_nm_1[] = {
281 {"f_fstype", rd_other, wr_other},
282 {"f_inodestotal", rd_other, wr_other},
283 {"f_inodesfree", rd_other, wr_other},
288 lprocfs_group_t lprocfs_ost_nm[] = {
289 {obd_dir_nm_1, obd_var_nm_1, e_generic},
290 {osc_dir_nm_1, obd_var_nm_1, e_generic},
291 {ost_lov_obdfilter_dir_nm_1, obd_var_nm_1, e_generic},
292 /* {ost_lov_obdfilter_dir_nm_2, ost_lov_obdfilter_var_nm_2, e_specific}, */
293 {snmp_dir_nm, snmp_var_nm, e_specific},
297 char* lov_snmp_dir_nm_1[] = {
301 lprocfs_vars_t lov_snmp_var_nm_1[] = {
302 {"lov_stripesize", rd_other, wr_other},
303 {"lov_stripedepth", rd_other, wr_other},
304 {"lov_stripefactor", rd_other, wr_other},
305 {"lov_stripetype", rd_other, wr_other},
309 lprocfs_group_t lprocfs_lov_nm[] = {
310 {obd_dir_nm_1, obd_var_nm_1, e_generic},
311 {osc_dir_nm_1, obd_var_nm_1, e_generic},
312 {ost_lov_obdfilter_dir_nm_1, obd_var_nm_1, e_generic},
313 /* {ost_lov_obdfilter_dir_nm_2, ost_lov_obdfilter_var_nm_2, e_specific}, */
314 {snmp_dir_nm, snmp_var_nm, e_specific},
315 {lov_snmp_dir_nm_1, lov_snmp_var_nm_1, e_specific},
319 lprocfs_group_t lprocfs_obdf_nm[] = {
320 {obd_dir_nm_1, obd_var_nm_1, e_generic},
321 {osc_dir_nm_1, obd_var_nm_1, e_generic},
322 {ost_lov_obdfilter_dir_nm_1, obd_var_nm_1, e_generic},
323 /* {ost_lov_obdfilter_dir_nm_2, ost_lov_obdfilter_var_nm_2, e_specific}, */
324 {snmp_dir_nm, snmp_var_nm, e_specific},
325 {obdfilter_snmp_dir_nm_1, obdfilter_snmp_var_nm_1, e_specific},
331 * LDLM Device namespace
335 char* ldlm_dir_nm_1[]={
344 lprocfs_vars_t ldlm_var_nm_1[]= {
345 {"num_total", lprocfs_ll_rd, lprocfs_ll_wr},
346 {"num_zerolatency", lprocfs_ll_rd, lprocfs_ll_wr},
347 {"num_zerolatency_inflight", lprocfs_ll_rd, lprocfs_ll_wr},
348 {"num_zerolatency_done", lprocfs_ll_rd, lprocfs_ll_wr},
349 {"nonzero_mintime", lprocfs_ll_rd, lprocfs_ll_wr},
350 {"nonzero_maxtime", lprocfs_ll_rd, lprocfs_ll_wr},
351 {"nonzero_sumtime", lprocfs_ll_rd, lprocfs_ll_wr},
356 lprocfs_group_t lprocfs_ldlm_nm[]={
357 {obd_dir_nm_1, obd_var_nm_1, e_generic},
358 {ldlm_dir_nm_1, ldlm_var_nm_1, e_generic},
363 * Note: Need to add namespace for breaking out locks by device class
369 char* ptlrpc_dir_nm_1[]={
374 lprocfs_vars_t ptlrpc_var_nm_1[]={
375 {"msgs_alloc", lprocfs_ll_rd, lprocfs_ll_wr},
376 {"msgs_max", lprocfs_ll_rd, lprocfs_ll_wr},
377 {"recv_count", lprocfs_ll_rd, lprocfs_ll_wr},
378 {"recv_length", lprocfs_ll_rd, lprocfs_ll_wr},
379 {"send_count", lprocfs_ll_rd, lprocfs_ll_wr},
380 {"send_length", lprocfs_ll_rd, lprocfs_ll_wr},
381 {"portal_kmemory", lprocfs_ll_rd, lprocfs_ll_wr},
385 char* ptlrpc_dir_nm_2[] = {
390 lprocfs_vars_t ptlrpc_var_nm_2[] = {
391 {"type", rd_string, wr_string},
392 {"mtu", lprocfs_ll_rd, lprocfs_ll_wr},
393 {"rxpackets", lprocfs_ll_rd, lprocfs_ll_wr},
394 {"txpackets", lprocfs_ll_rd, lprocfs_ll_wr},
395 {"txbytes", lprocfs_ll_rd, lprocfs_ll_wr},
399 lprocfs_group_t lprocfs_ptlrpc_nm[]={
400 {obd_dir_nm_1, obd_var_nm_1, e_generic},
401 {ptlrpc_dir_nm_1, ptlrpc_var_nm_1, e_generic},
402 {ptlrpc_dir_nm_2, ptlrpc_var_nm_2, e_specific},
403 {snmp_dir_nm, snmp_var_nm, e_specific},
409 * Building the entire device namespace. This will be used during attach and
410 * detach to associate the namespace with the class of the device
413 lprocfs_obd_nm_t obd_nm[]={
414 {"mdc", lprocfs_mdc_nm, sizeof(struct lprofiler_gen)},
415 {"mds", lprocfs_mds_nm, sizeof(struct lprofiler_gen)},
416 {"osc", lprocfs_osc_nm, sizeof(struct lprofiler_gen)},
417 {"ost", lprocfs_ost_nm, sizeof(struct lprofiler_gen)},
418 {"lov", lprocfs_lov_nm, sizeof(struct lprofiler_gen)},
419 {"obdfilter", lprocfs_obdf_nm, sizeof(struct lprofiler_gen)},
420 {"obdecho", lprocfs_ost_nm, sizeof(struct lprofiler_gen)},
421 {"ldlm", lprocfs_ldlm_nm, sizeof(struct lprofiler_ldlm)},
422 {"ptlrpc", lprocfs_ptlrpc_nm, sizeof(struct lprofiler_ptlrpc)},
428 lprocfs_obd_nm_t* obd_nm=0;
432 /* opening /dev/obd */
433 static int obd_class_open(struct inode * inode, struct file * file)
437 file->private_data = NULL;
438 CDEBUG(D_IOCTL, "MOD_INC_USE for open: count = %d\n",
439 atomic_read(&(THIS_MODULE)->uc.usecount));
444 /* closing /dev/obd */
445 static int obd_class_release(struct inode * inode, struct file * file)
449 // XXX drop lsm, connections here
450 if (file->private_data)
451 file->private_data = NULL;
453 CDEBUG(D_IOCTL, "MOD_DEC_USE for close: count = %d\n",
454 atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
460 inline void obd_data2conn(struct lustre_handle *conn, struct obd_ioctl_data *data)
462 conn->addr = data->ioc_addr;
463 conn->cookie = data->ioc_cookie;
467 inline void obd_conn2data(struct obd_ioctl_data *data, struct lustre_handle *conn)
469 data->ioc_addr = conn->addr;
470 data->ioc_cookie = conn->cookie;
473 static void forcibly_detach_exports(struct obd_device *obd)
476 struct list_head *tmp, *n;
477 struct lustre_handle fake_conn;
479 CDEBUG(D_IOCTL, "OBD device %d (%p) has exports, "
480 "disconnecting them", obd->obd_minor, obd);
481 list_for_each_safe(tmp, n, &obd->obd_exports) {
482 struct obd_export *exp = list_entry(tmp, struct obd_export,
484 fake_conn.addr = (__u64)(unsigned long)exp;
485 fake_conn.cookie = exp->exp_cookie;
486 rc = obd_disconnect(&fake_conn);
488 CDEBUG(D_IOCTL, "disconnecting export %p failed: %d\n",
491 CDEBUG(D_IOCTL, "export %p disconnected\n", exp);
496 /* to control /dev/obd */
497 static int obd_class_ioctl (struct inode * inode, struct file * filp,
498 unsigned int cmd, unsigned long arg)
502 struct obd_ioctl_data *data;
503 struct obd_device *obd = filp->private_data;
505 struct lustre_handle conn;
506 int rw = OBD_BRW_READ;
514 case OBD_IOC_BRW_WRITE:
515 case OBD_IOC_BRW_READ:
516 case OBD_IOC_GETATTR:
524 if (!obd && cmd != OBD_IOC_DEVICE && cmd != TCGETS &&
525 cmd != OBD_IOC_LIST &&
526 cmd != OBD_IOC_NAME2DEV && cmd != OBD_IOC_NEWDEV) {
527 CERROR("OBD ioctl: No device\n");
528 GOTO(out, err=-EINVAL);
530 if (obd_ioctl_getdata(&buf, &len, (void *)arg)) {
531 CERROR("OBD ioctl: data error\n");
532 GOTO(out, err=-EINVAL);
534 data = (struct obd_ioctl_data *)buf;
538 GOTO(out, err=-EINVAL);
539 case OBD_IOC_DEVICE: {
540 CDEBUG(D_IOCTL, "\n");
541 if (data->ioc_dev >= MAX_OBD_DEVICES || data->ioc_dev < 0) {
542 CERROR("OBD ioctl: DEVICE insufficient devices\n");
543 GOTO(out, err=-EINVAL);
545 CDEBUG(D_IOCTL, "device %d\n", data->ioc_dev);
547 filp->private_data = &obd_dev[data->ioc_dev];
553 char *buf2 = data->ioc_bulk;
554 int remains = data->ioc_inllen1;
556 if (!data->ioc_inlbuf1) {
557 CERROR("No buffer passed!\n");
558 GOTO(out, err=-EINVAL);
562 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
565 struct obd_device *obd = &obd_dev[i];
568 if (obd->obd_flags & OBD_SET_UP)
570 else if (obd->obd_flags & OBD_ATTACHED)
574 l = snprintf(buf2, remains, "%2d %s %s %s %s %d\n",
575 i, status, obd->obd_type->typ_name,
576 obd->obd_name, obd->obd_uuid, obd->obd_type->typ_refcnt);
580 CERROR("not enough space for device listing\n");
585 err = copy_to_user((void *)arg, data, len);
590 case OBD_IOC_NAME2DEV: {
591 /* Resolve a device name. This does not change the
592 * currently selected device.
596 if (!data->ioc_inllen1 || !data->ioc_inlbuf1 ) {
597 CERROR("No name passed,!\n");
598 GOTO(out, err=-EINVAL);
600 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
601 CERROR("Name not nul terminated!\n");
602 GOTO(out, err=-EINVAL);
605 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
606 dev = class_name2dev(data->ioc_inlbuf1);
609 CDEBUG(D_IOCTL, "No device for name %s!\n",
611 GOTO(out, err=-EINVAL);
614 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
616 err = copy_to_user((void *)arg, data, sizeof(*data));
620 case OBD_IOC_UUID2DEV: {
621 /* Resolve a device uuid. This does not change the
622 * currently selected device.
626 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
627 CERROR("No UUID passed!\n");
628 GOTO(out, err=-EINVAL);
630 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
631 CERROR("Name not nul terminated!\n");
632 GOTO(out, err=-EINVAL);
635 CDEBUG(D_IOCTL, "device name %s\n", data->ioc_inlbuf1);
636 dev = class_uuid2dev(data->ioc_inlbuf1);
639 CDEBUG(D_IOCTL, "No device for name %s!\n",
641 GOTO(out, err=-EINVAL);
644 CDEBUG(D_IOCTL, "device name %s, dev %d\n", data->ioc_inlbuf1,
646 err = copy_to_user((void *)arg, data, sizeof(*data));
650 case OBD_IOC_NEWDEV: {
654 filp->private_data = NULL;
655 for (i = 0 ; i < MAX_OBD_DEVICES ; i++) {
656 struct obd_device *obd = &obd_dev[i];
657 if (!obd->obd_type) {
658 filp->private_data = obd;
667 GOTO(out, err=-EINVAL);
669 err = copy_to_user((void *)arg, data, sizeof(*data));
673 case OBD_IOC_ATTACH: {
674 struct obd_type *type;
677 /* have we attached a type to this device */
678 if (obd->obd_flags & OBD_ATTACHED || obd->obd_type) {
679 CERROR("OBD: Device %d already typed as %s.\n",
680 obd->obd_minor, MKSTR(obd->obd_type->typ_name));
681 GOTO(out, err=-EBUSY);
684 if (!data->ioc_inllen1 || !data->ioc_inlbuf1) {
685 CERROR("No type passed!\n");
686 GOTO(out, err=-EINVAL);
688 if (data->ioc_inlbuf1[data->ioc_inllen1-1] !=0) {
689 CERROR("Type not nul terminated!\n");
690 GOTO(out, err=-EINVAL);
693 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
694 MKSTR(data->ioc_inlbuf1),
695 MKSTR(data->ioc_inlbuf2), MKSTR(data->ioc_inlbuf3));
698 type = class_nm_to_type(data->ioc_inlbuf1);
700 CERROR("OBD: unknown type dev %d\n", obd->obd_minor);
701 GOTO(out, err=-EINVAL);
704 minor = obd->obd_minor;
705 memset(obd, 0, sizeof(*obd));
706 obd->obd_minor = minor;
707 obd->obd_type = type;
708 INIT_LIST_HEAD(&obd->obd_exports);
709 INIT_LIST_HEAD(&obd->obd_imports);
710 spin_lock_init(&obd->obd_dev_lock);
713 if (OBP(obd, attach))
714 err = OBP(obd,attach)(obd, sizeof(*data), data);
716 obd->obd_type = NULL;
718 obd->obd_flags |= OBD_ATTACHED;
721 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
722 obd->obd_minor, data->ioc_inlbuf1);
723 if (data->ioc_inlbuf2) {
724 int len = strlen(data->ioc_inlbuf2) + 1;
725 OBD_ALLOC(obd->obd_name, len);
726 if (!obd->obd_name) {
727 CERROR("no memory\n");
730 memcpy(obd->obd_name, data->ioc_inlbuf2, len);
731 /* obd->obd_proc_entry =
732 proc_lustre_register_obd_device(obd);
735 CERROR("WARNING: unnamed obd device\n");
736 obd->obd_proc_entry = NULL;
739 if (data->ioc_inlbuf3) {
740 int len = strlen(data->ioc_inlbuf3);
741 if (len >= sizeof(obd->obd_uuid)) {
742 CERROR("uuid must be < %d bytes long\n",
743 sizeof(obd->obd_uuid));
745 OBD_FREE(obd->obd_name,
746 strlen(obd->obd_name) + 1);
747 GOTO(out, err=-EINVAL);
749 memcpy(obd->obd_uuid, data->ioc_inlbuf3, len);
752 /* Get the LprocFS namespace for this device class */
753 l_idx = lprocfs_get_nm(data->ioc_inlbuf1, obd_nm);
755 CERROR("Non-existent device class"
756 "or proc/lustre not compiled \n");
758 lprocfs_reg_dev(obd, obd_nm[l_idx].obd_names,
759 obd_nm[l_idx].cntr_blk_sz);
762 CDEBUG(D_IOCTL, "MOD_INC_USE for attach: count = %d\n",
763 atomic_read(&(THIS_MODULE)->uc.usecount));
770 case OBD_IOC_DETACH: {
772 if (obd->obd_flags & OBD_SET_UP) {
773 CERROR("OBD device %d still set up\n", obd->obd_minor);
774 GOTO(out, err=-EBUSY);
776 if (!(obd->obd_flags & OBD_ATTACHED) ) {
777 CERROR("OBD device %d not attached\n", obd->obd_minor);
778 GOTO(out, err=-ENODEV);
780 if (!list_empty(&obd->obd_exports) ) {
781 if (data->ioc_inlbuf1[0] != 'F') {
782 CERROR("OBD device %d (%p) has exports\n",
783 obd->obd_minor, obd);
784 GOTO(out, err=-EBUSY);
786 forcibly_detach_exports(obd);
789 if (lprocfs_dereg_dev(obd) != LPROCFS_SUCCESS) {
790 CERROR("Could not remove /proc entry\n");
794 OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
795 obd->obd_name = NULL;
798 if (obd->obd_proc_entry)
799 proc_lustre_release_obd_device(obd);
802 obd->obd_flags &= ~OBD_ATTACHED;
803 obd->obd_type->typ_refcnt--;
804 obd->obd_type = NULL;
805 CDEBUG(D_IOCTL, "MOD_DEC_USE for detach: count = %d\n",
806 atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
811 case OBD_IOC_SETUP: {
812 /* have we attached a type to this device? */
813 if (!(obd->obd_flags & OBD_ATTACHED)) {
814 CERROR("Device %d not attached\n", obd->obd_minor);
815 GOTO(out, err=-ENODEV);
818 /* has this been done already? */
819 if ( obd->obd_flags & OBD_SET_UP ) {
820 CERROR("Device %d already setup (type %s)\n",
821 obd->obd_minor, obd->obd_type->typ_name);
822 GOTO(out, err=-EBUSY);
825 if ( OBT(obd) && OBP(obd, setup) )
826 err = obd_setup(obd, sizeof(*data), data);
829 obd->obd_type->typ_refcnt++;
830 obd->obd_flags |= OBD_SET_UP;
835 case OBD_IOC_CLEANUP: {
836 /* have we attached a type to this device? */
837 if (!(obd->obd_flags & OBD_ATTACHED)) {
838 CERROR("Device %d not attached\n", obd->obd_minor);
839 GOTO(out, err=-ENODEV);
842 if ( OBT(obd) && OBP(obd, cleanup) )
843 err = obd_cleanup(obd);
846 obd->obd_flags &= ~OBD_SET_UP;
847 obd->obd_type->typ_refcnt--;
852 case OBD_IOC_CONNECT: {
853 char * cluuid = "OBD_CLASS_UUID";
854 obd_data2conn(&conn, data);
856 err = obd_connect(&conn, obd, cluuid, NULL, NULL);
858 CDEBUG(D_IOCTL, "assigned export "LPX64"\n", conn.addr);
859 obd_conn2data(data, &conn);
863 err = copy_to_user((void *)arg, data, sizeof(*data));
864 // XXX save connection data into file handle
868 case OBD_IOC_DISCONNECT: {
869 obd_data2conn(&conn, data);
870 err = obd_disconnect(&conn);
874 case OBD_IOC_DEC_USE_COUNT: {
875 CDEBUG(D_IOCTL, "MOD_DEC_USE for force dec: count = %d\n",
876 atomic_read(&(THIS_MODULE)->uc.usecount) - 1);
881 case OBD_IOC_CREATE: {
882 struct lov_stripe_md *lsm = NULL;
883 obd_data2conn(&conn, data);
885 #warning FIXME: save lsm into file handle for other ops, release on close
886 err = obd_create(&conn, &data->ioc_obdo1, &lsm);
890 err = copy_to_user((void *)arg, data, sizeof(*data));
894 case OBD_IOC_GETATTR: {
896 obd_data2conn(&conn, data);
897 err = obd_getattr(&conn, &data->ioc_obdo1, NULL);
901 err = copy_to_user((void *)arg, data, sizeof(*data));
905 case OBD_IOC_SETATTR: {
906 obd_data2conn(&conn, data);
907 err = obd_setattr(&conn, &data->ioc_obdo1, NULL);
911 err = copy_to_user((void *)arg, data, sizeof(*data));
915 case OBD_IOC_DESTROY: {
917 obd_data2conn(&conn, data);
919 err = obd_destroy(&conn, &data->ioc_obdo1, NULL);
923 err = copy_to_user((void *)arg, data, sizeof(*data));
928 struct lov_stripe_md *lsm = NULL; // XXX fill in from create
930 obd_data2conn(&conn, data);
931 err = obd_open(&conn, &data->ioc_obdo1, lsm);
935 case OBD_IOC_CLOSE: {
936 struct lov_stripe_md *lsm = NULL; // XXX fill in from create
938 obd_data2conn(&conn, data);
939 obd_data2conn(&conn, data);
940 err = obd_close(&conn, &data->ioc_obdo1, lsm);
944 case OBD_IOC_BRW_WRITE:
946 case OBD_IOC_BRW_READ: {
947 struct lov_stripe_md tmp_lsm; // XXX fill in from create
948 struct lov_stripe_md *lsm = &tmp_lsm; // XXX fill in from create
949 struct io_cb_data *cbd = ll_init_cb();
951 struct brw_page *pga, *pgp;
952 __u64 id = data->ioc_obdo1.o_id;
953 int gfp_mask = (id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
954 int verify = (id != 0);
959 GOTO(out, err = -ENOMEM);
961 obd_data2conn(&conn, data);
963 pages = data->ioc_count / PAGE_SIZE;
964 off = data->ioc_offset;
966 CDEBUG(D_INODE, "BRW %s with %d pages @ "LPX64"\n",
967 rw == OBD_BRW_READ ? "read" : "write", pages, off);
968 OBD_ALLOC(pga, pages * sizeof(*pga));
970 CERROR("no memory for %d BRW per-page data\n", pages);
971 GOTO(brw_free, err = -ENOMEM);
974 memset(lsm, 0, sizeof(*lsm)); // XXX don't do this later
975 lsm->lsm_object_id = id; // ensure id == lsm->lsm_object_id
977 for (j = 0, pgp = pga; j < pages; j++, off += PAGE_SIZE, pgp++){
978 pgp->pg = alloc_pages(gfp_mask, 0);
980 CERROR("no memory for brw pages\n");
981 GOTO(brw_cleanup, err = -ENOMEM);
983 pgp->count = PAGE_SIZE;
988 void *addr = kmap(pgp->pg);
990 if (rw == OBD_BRW_WRITE)
991 page_debug_setup(addr, pgp->count,
994 page_debug_setup(addr, pgp->count,
1001 err = obd_brw(rw, &conn, lsm, j, pga, ll_sync_io_cb, cbd);
1003 CERROR("test_brw: error from obd_brw: err = %d\n", err);
1006 for (j = 0, pgp = pga; j < pages; j++, pgp++) {
1007 if (pgp->pg != NULL) {
1008 if (verify && !err) {
1009 void *addr = kmap(pgp->pg);
1011 err = page_debug_check("test_brw",
1017 __free_pages(pgp->pg, 0);
1021 OBD_FREE(pga, pages * sizeof(*pga));
1025 obd_data2conn(&conn, data);
1027 err = obd_iocontrol(cmd, &conn, len, data, NULL);
1031 err = copy_to_user((void *)arg, data, len);
1041 } /* obd_class_ioctl */
1045 /* declare character device */
1046 static struct file_operations obd_psdev_fops = {
1047 ioctl: obd_class_ioctl, /* ioctl */
1048 open: obd_class_open, /* open */
1049 release: obd_class_release, /* release */
1053 #define OBD_MINOR 241
1054 static struct miscdevice obd_psdev = {
1060 void (*class_signal_connection_failure)(struct ptlrpc_connection *);
1062 EXPORT_SYMBOL(obd_dev);
1063 EXPORT_SYMBOL(obdo_cachep);
1064 EXPORT_SYMBOL(handle_cachep);
1065 EXPORT_SYMBOL(obd_memory);
1066 EXPORT_SYMBOL(obd_fail_loc);
1067 EXPORT_SYMBOL(obd_timeout);
1068 EXPORT_SYMBOL(obd_recovery_upcall);
1069 EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
1071 EXPORT_SYMBOL(class_register_type);
1072 EXPORT_SYMBOL(class_unregister_type);
1073 EXPORT_SYMBOL(class_name2dev);
1074 EXPORT_SYMBOL(class_uuid2dev);
1075 EXPORT_SYMBOL(class_uuid2obd);
1076 EXPORT_SYMBOL(class_new_export);
1077 EXPORT_SYMBOL(class_destroy_export);
1078 EXPORT_SYMBOL(class_connect);
1079 EXPORT_SYMBOL(class_conn2export);
1080 EXPORT_SYMBOL(class_conn2obd);
1081 EXPORT_SYMBOL(class_conn2cliimp);
1082 EXPORT_SYMBOL(class_conn2ldlmimp);
1083 EXPORT_SYMBOL(class_disconnect);
1084 EXPORT_SYMBOL(class_disconnect_all);
1085 //EXPORT_SYMBOL(class_uuid_parse);
1086 EXPORT_SYMBOL(class_uuid_unparse);
1087 //EXPORT_SYMBOL(class_multi_setup);
1088 //EXPORT_SYMBOL(class_multi_cleanup);
1090 EXPORT_SYMBOL(class_signal_connection_failure);
1091 EXPORT_SYMBOL(ll_sync_io_cb);
1092 EXPORT_SYMBOL(ll_init_cb);
1094 static int __init init_obdclass(void)
1096 struct obd_device *obd;
1100 printk(KERN_INFO "OBD class driver v0.9, info@clusterfs.com\n");
1102 sema_init(&obd_conf_sem, 1);
1103 INIT_LIST_HEAD(&obd_types);
1105 if ((err = misc_register(&obd_psdev))) {
1106 CERROR("cannot register %d err %d\n", OBD_MINOR, err);
1110 /* This struct is already zerod for us (static global) */
1111 for (i = 0, obd = obd_dev; i < MAX_OBD_DEVICES; i++, obd++)
1114 err = obd_init_caches();
1121 static void __exit cleanup_obdclass(void)
1126 misc_deregister(&obd_psdev);
1127 for (i = 0; i < MAX_OBD_DEVICES; i++) {
1128 struct obd_device *obd = &obd_dev[i];
1129 if (obd->obd_type && (obd->obd_flags & OBD_SET_UP) &&
1130 OBT(obd) && OBP(obd, detach)) {
1131 /* XXX should this call generic detach otherwise? */
1132 OBP(obd, detach)(obd);
1136 obd_cleanup_caches();
1138 CERROR("obd memory leaked: %ld bytes\n", obd_memory);
1142 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
1143 MODULE_DESCRIPTION("Lustre Class Driver v1.0");
1144 MODULE_LICENSE("GPL");
1146 module_init(init_obdclass);
1147 module_exit(cleanup_obdclass);