/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * linux/fs/obdecho/echo.c
+ * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*
- * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
+ * This file is part of Lustre, http://www.lustre.org.
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
*
- * by Peter Braam <braam@clusterfs.com>
- * and Andreas Dilger <adilger@clusterfs.com>
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-static char rcsid[] __attribute ((unused)) = "$Id: echo.c,v 1.43 2002/11/02 01:09:28 braam Exp $";
-#define OBDECHO_VERSION "$Revision: 1.43 $"
-
#define EXPORT_SYMTAB
#include <linux/version.h>
#include <linux/lustre_dlm.h>
#include <linux/lprocfs_status.h>
-static atomic_t echo_page_rws;
-static atomic_t echo_getattrs;
-
-#define ECHO_PROC_STAT "sys/obdecho"
-#define ECHO_INIT_OBJID 0x1000000000000000ULL
+#define ECHO_INIT_OBJID 0x1000000000000000ULL
+#define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
+
+#define ECHO_OBJECT0_NPAGES 16
+static struct page *echo_object0_pages[ECHO_OBJECT0_NPAGES];
+
+/* should be generic per-obd stats... */
+struct xprocfs_io_stat {
+ __u64 st_read_bytes;
+ __u64 st_read_reqs;
+ __u64 st_write_bytes;
+ __u64 st_write_reqs;
+ __u64 st_getattr_reqs;
+ __u64 st_setattr_reqs;
+ __u64 st_create_reqs;
+ __u64 st_destroy_reqs;
+ __u64 st_statfs_reqs;
+ __u64 st_open_reqs;
+ __u64 st_close_reqs;
+ __u64 st_punch_reqs;
+};
-extern lprocfs_vars_t status_var_nm_1[];
-extern lprocfs_vars_t status_class_var[];
+static struct xprocfs_io_stat xprocfs_iostats[NR_CPUS];
+static struct proc_dir_entry *xprocfs_dir;
+
+#define XPROCFS_BUMP_MYCPU_IOSTAT(field, count) \
+do { \
+ xprocfs_iostats[smp_processor_id()].field += (count); \
+} while (0)
+
+#define DECLARE_XPROCFS_SUM_STAT(field) \
+static long long \
+xprocfs_sum_##field (void) \
+{ \
+ long long stat = 0; \
+ int i; \
+ \
+ for (i = 0; i < smp_num_cpus; i++) \
+ stat += xprocfs_iostats[i].field; \
+ return (stat); \
+}
-int echo_proc_read(char *page, char **start, off_t off, int count, int *eof,
- void *data)
+DECLARE_XPROCFS_SUM_STAT (st_read_bytes)
+DECLARE_XPROCFS_SUM_STAT (st_read_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_write_bytes)
+DECLARE_XPROCFS_SUM_STAT (st_write_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_getattr_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_setattr_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_create_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_destroy_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_statfs_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_open_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_close_reqs)
+DECLARE_XPROCFS_SUM_STAT (st_punch_reqs)
+
+static int
+xprocfs_rd_stat (char *page, char **start, off_t off, int count,
+ int *eof, void *data)
{
- long long attrs = atomic_read(&echo_getattrs);
- long long pages = atomic_read(&echo_page_rws);
- int len;
-
+ long long (*fn)(void) = (long long(*)(void))data;
+ int len;
+
*eof = 1;
if (off != 0)
return (0);
- len = sprintf(page, "%Ld %Ld\n", attrs, pages);
-
+ len = snprintf (page, count, "%Ld\n", fn());
*start = page;
return (len);
}
+
-int echo_proc_write(struct file *file, const char *ubuffer,
- unsigned long count, void *data)
+static void
+xprocfs_add_stat(char *name, long long (*fn)(void))
{
- /* Ignore what we've been asked to write, and just zero the counters */
- atomic_set (&echo_page_rws, 0);
- atomic_set (&echo_getattrs, 0);
+ struct proc_dir_entry *entry;
+
+ entry = create_proc_entry (name, S_IFREG|S_IRUGO, xprocfs_dir);
+ if (entry == NULL) {
+ CERROR ("Can't add procfs stat %s\n", name);
+ return;
+ }
- return (count);
+ entry->data = fn;
+ entry->read_proc = xprocfs_rd_stat;
+ entry->write_proc = NULL;
}
-void echo_proc_init(void)
+static void
+xprocfs_init (char *name)
{
- struct proc_dir_entry *entry;
-
- entry = create_proc_entry(ECHO_PROC_STAT, S_IFREG|S_IRUGO|S_IWUSR,NULL);
+ char dirname[64];
+
+ snprintf (dirname, sizeof (dirname), "sys/%s", name);
- if (entry == NULL) {
- CERROR("couldn't create proc entry %s\n", ECHO_PROC_STAT);
+ xprocfs_dir = proc_mkdir (dirname, NULL);
+ if (xprocfs_dir == NULL) {
+ CERROR ("Can't make dir\n");
return;
}
- entry->data = NULL;
- entry->read_proc = echo_proc_read;
- entry->write_proc = echo_proc_write;
+ xprocfs_add_stat ("read_bytes", xprocfs_sum_st_read_bytes);
+ xprocfs_add_stat ("read_reqs", xprocfs_sum_st_read_reqs);
+ xprocfs_add_stat ("write_bytes", xprocfs_sum_st_write_bytes);
+ xprocfs_add_stat ("write_reqs", xprocfs_sum_st_write_reqs);
+ xprocfs_add_stat ("getattr_reqs", xprocfs_sum_st_getattr_reqs);
+ xprocfs_add_stat ("setattr_reqs", xprocfs_sum_st_setattr_reqs);
+ xprocfs_add_stat ("create_reqs", xprocfs_sum_st_create_reqs);
+ xprocfs_add_stat ("destroy_reqs", xprocfs_sum_st_destroy_reqs);
+ xprocfs_add_stat ("statfs_reqs", xprocfs_sum_st_statfs_reqs);
+ xprocfs_add_stat ("open_reqs", xprocfs_sum_st_open_reqs);
+ xprocfs_add_stat ("close_reqs", xprocfs_sum_st_close_reqs);
+ xprocfs_add_stat ("punch_reqs", xprocfs_sum_st_punch_reqs);
}
-void echo_proc_fini(void)
+void xprocfs_fini (void)
{
- remove_proc_entry(ECHO_PROC_STAT, 0);
+ if (xprocfs_dir == NULL)
+ return;
+
+ remove_proc_entry ("read_bytes", xprocfs_dir);
+ remove_proc_entry ("read_reqs", xprocfs_dir);
+ remove_proc_entry ("write_bytes", xprocfs_dir);
+ remove_proc_entry ("write_reqs", xprocfs_dir);
+ remove_proc_entry ("getattr_reqs", xprocfs_dir);
+ remove_proc_entry ("setattr_reqs", xprocfs_dir);
+ remove_proc_entry ("create_reqs", xprocfs_dir);
+ remove_proc_entry ("destroy_reqs", xprocfs_dir);
+ remove_proc_entry ("statfs_reqs", xprocfs_dir);
+ remove_proc_entry ("open_reqs", xprocfs_dir);
+ remove_proc_entry ("close_reqs", xprocfs_dir);
+ remove_proc_entry ("punch_reqs", xprocfs_dir);
+
+ remove_proc_entry (xprocfs_dir->name, xprocfs_dir->parent);
+ xprocfs_dir = NULL;
}
static int echo_connect(struct lustre_handle *conn, struct obd_device *obd,
- obd_uuid_t cluuid, struct recovd_obd *recovd,
+ struct obd_uuid *cluuid, struct recovd_obd *recovd,
ptlrpc_recovery_cb_t recover)
{
- int rc;
-
- MOD_INC_USE_COUNT;
- rc = class_connect(conn, obd, cluuid);
-
- if (rc)
- MOD_DEC_USE_COUNT;
-
- return rc;
+ return class_connect(conn, obd, cluuid);
}
static int echo_disconnect(struct lustre_handle *conn)
{
- int rc;
-
- rc = class_disconnect(conn);
- if (!rc)
- MOD_DEC_USE_COUNT;
-
- return rc;
+ struct obd_export *exp = class_conn2export(conn);
+
+ LASSERT (exp != NULL);
+
+ ldlm_cancel_locks_for_export (exp);
+ return (class_disconnect (conn));
}
static __u64 echo_next_id(struct obd_device *obddev)
}
int echo_create(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md **ea)
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
{
struct obd_device *obd = class_conn2obd(conn);
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_create_reqs, 1);
+
if (!obd) {
- CERROR("invalid client %Lx\n", conn->addr);
+ CERROR("invalid client "LPX64"\n", conn->addr);
return -EINVAL;
}
if (!(oa->o_mode && S_IFMT)) {
- CERROR("filter obd: no type!\n");
+ CERROR("echo obd: no type!\n");
return -ENOENT;
}
}
int echo_destroy(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *ea)
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
{
struct obd_device *obd = class_conn2obd(conn);
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_destroy_reqs, 1);
+
if (!obd) {
CERROR("invalid client "LPX64"\n", conn->addr);
RETURN(-EINVAL);
}
static int echo_open(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
+ struct lustre_handle *fh = obdo_handle (oa);
+ struct obd_device *obd = class_conn2obd (conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_open_reqs, 1);
+
+ if (!obd) {
+ CERROR ("invalid client "LPX64"\n", conn->addr);
+ return (-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR ("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ return (-EINVAL);
+ }
+
+ fh->addr = oa->o_id;
+ fh->cookie = ECHO_HANDLE_MAGIC;
+
+ oa->o_valid |= OBD_MD_FLHANDLE;
return 0;
}
static int echo_close(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
+ struct lustre_handle *fh = obdo_handle (oa);
+ struct obd_device *obd = class_conn2obd(conn);
+
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_close_reqs, 1);
+
+ if (!obd) {
+ CERROR("invalid client "LPX64"\n", conn->addr);
+ return (-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLHANDLE)) {
+ CERROR("obdo missing FLHANDLE valid flag: %08x\n", oa->o_valid);
+ return (-EINVAL);
+ }
+
+ if (fh->cookie != ECHO_HANDLE_MAGIC) {
+ CERROR ("invalid file handle on close: "LPX64"\n", fh->cookie);
+ return (-EINVAL);
+ }
+
return 0;
}
struct obd_device *obd = class_conn2obd(conn);
obd_id id = oa->o_id;
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_getattr_reqs, 1);
+
if (!obd) {
CERROR("invalid client "LPX64"\n", conn->addr);
RETURN(-EINVAL);
RETURN(-EINVAL);
}
- memcpy(oa, &obd->u.echo.oa, sizeof(*oa));
+ obdo_cpy_md(oa, &obd->u.echo.oa, oa->o_valid);
oa->o_id = id;
- oa->o_valid |= OBD_MD_FLID;
-
- atomic_inc(&echo_getattrs);
return 0;
}
static int echo_setattr(struct lustre_handle *conn, struct obdo *oa,
- struct lov_stripe_md *md)
+ struct lov_stripe_md *md, struct obd_trans_info *oti)
{
struct obd_device *obd = class_conn2obd(conn);
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_setattr_reqs, 1);
+
if (!obd) {
CERROR("invalid client "LPX64"\n", conn->addr);
RETURN(-EINVAL);
int echo_preprw(int cmd, struct lustre_handle *conn, int objcount,
struct obd_ioobj *obj, int niocount, struct niobuf_remote *nb,
- struct niobuf_local *res, void **desc_private)
+ struct niobuf_local *res, void **desc_private, struct obd_trans_info *oti)
{
struct obd_device *obd;
struct niobuf_local *r = res;
int rc = 0;
int i;
-
ENTRY;
+ if ((cmd & OBD_BRW_WRITE) != 0)
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_write_reqs, 1);
+ else
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_read_reqs, 1);
+
obd = class_conn2obd(conn);
if (!obd) {
CERROR("invalid client "LPX64"\n", conn->addr);
*desc_private = (void *)DESC_PRIV;
+ obd_kmap_get(niocount, 1);
+
for (i = 0; i < objcount; i++, obj++) {
int gfp_mask = (obj->ioo_id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
- int verify = obj->ioo_id != 0;
+ int isobj0 = obj->ioo_id == 0;
+ int verify = !isobj0;
int j;
for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, r++) {
- r->page = alloc_pages(gfp_mask, 0);
- if (!r->page) {
- CERROR("can't get page %d/%d for id "LPU64"\n",
- j, obj->ioo_bufcnt, obj->ioo_id);
- GOTO(preprw_cleanup, rc = -ENOMEM);
+
+ if (isobj0 &&
+ (nb->offset >> PAGE_SHIFT) < ECHO_OBJECT0_NPAGES) {
+ r->page = echo_object0_pages[nb->offset >> PAGE_SHIFT];
+ /* Take extra ref so __free_pages() can be called OK */
+ get_page (r->page);
+ } else {
+ r->page = alloc_pages(gfp_mask, 0);
+ if (r->page == NULL) {
+ CERROR("can't get page %d/%d for id "LPU64"\n",
+ j, obj->ioo_bufcnt, obj->ioo_id);
+ GOTO(preprw_cleanup, rc = -ENOMEM);
+ }
}
+
atomic_inc(&obd->u.echo.eo_prep);
r->offset = nb->offset;
CDEBUG(D_PAGE, "$$$$ get page %p, addr %p@"LPU64"\n",
r->page, r->addr, r->offset);
- if (verify && cmd == OBD_BRW_READ)
- page_debug_setup(r->addr, r->len, r->offset,
- obj->ioo_id);
- else if (verify)
- page_debug_setup(r->addr, r->len,
- 0xecc0ecc0ecc0ecc0,
- 0xecc0ecc0ecc0ecc0);
+ if (cmd == OBD_BRW_READ) {
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_read_bytes, r->len);
+ if (verify)
+ page_debug_setup(r->addr, r->len, r->offset,
+ obj->ioo_id);
+ } else {
+ XPROCFS_BUMP_MYCPU_IOSTAT (st_write_bytes, r->len);
+ if (verify)
+ page_debug_setup(r->addr, r->len,
+ 0xecc0ecc0ecc0ecc0,
+ 0xecc0ecc0ecc0ecc0);
+ }
}
}
CDEBUG(D_PAGE, "%d pages allocated after prep\n",
CERROR("cleaning up %ld pages (%d obdos)\n", (long)(r - res), objcount);
while (r-- > res) {
kunmap(r->page);
+ /* NB if this is an 'object0' page, __free_pages will just
+ * lose the extra ref gained above */
__free_pages(r->page, 0);
atomic_dec(&obd->u.echo.eo_prep);
}
+ obd_kmap_put(niocount);
memset(res, 0, sizeof(*res) * niocount);
return rc;
int echo_commitrw(int cmd, struct lustre_handle *conn, int objcount,
struct obd_ioobj *obj, int niocount, struct niobuf_local *res,
- void *desc_private)
+ void *desc_private, struct obd_trans_info *oti)
{
struct obd_device *obd;
struct niobuf_local *r = res;
int rc = 0;
+ int vrc = 0;
int i;
ENTRY;
GOTO(commitrw_cleanup, rc = -EFAULT);
}
- atomic_inc(&echo_page_rws);
-
CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@"LPU64"\n",
r->page, addr, r->offset);
- if (verify)
- page_debug_check("echo", addr, r->len,
- r->offset, obj->ioo_id);
-
+ if (verify) {
+ vrc = page_debug_check("echo", addr, r->len,
+ r->offset, obj->ioo_id);
+ /* check all the pages always */
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+
kunmap(page);
+ /* NB see comment above regarding object0 pages */
+ obd_kmap_put(1);
__free_pages(page, 0);
atomic_dec(&obd->u.echo.eo_prep);
}
}
CDEBUG(D_PAGE, "%d pages remain after commit\n",
atomic_read(&obd->u.echo.eo_prep));
- RETURN(0);
+ RETURN(rc);
commitrw_cleanup:
CERROR("cleaning up %ld pages (%d obdos)\n",
struct page *page = r->page;
kunmap(page);
+ obd_kmap_put(1);
+ /* NB see comment above regarding object0 pages */
__free_pages(page, 0);
atomic_dec(&obd->u.echo.eo_prep);
}
{
ENTRY;
+ spin_lock_init(&obddev->u.echo.eo_lock);
+ obddev->u.echo.eo_lastino = ECHO_INIT_OBJID;
+
obddev->obd_namespace =
ldlm_namespace_new("echo-tgt", LDLM_NAMESPACE_SERVER);
if (obddev->obd_namespace == NULL) {
LBUG();
RETURN(-ENOMEM);
}
- spin_lock_init(&obddev->u.echo.eo_lock);
- obddev->u.echo.eo_lastino = ECHO_INIT_OBJID;
+ ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
+ "echo_ldlm_cb_client", &obddev->obd_ldlm_client);
RETURN(0);
}
RETURN(0);
}
-int echo_attach(struct obd_device *dev,
- obd_count len, void *data)
+int echo_attach(struct obd_device *dev, obd_count len, void *data)
{
- int rc;
- rc = lprocfs_reg_obd(dev, (lprocfs_vars_t*)status_var_nm_1, (void*)dev);
- return rc;
+ struct lprocfs_static_vars lvars;
+
+ lprocfs_init_vars(&lvars);
+ return lprocfs_obd_attach(dev, lvars.obd_vars);
}
int echo_detach(struct obd_device *dev)
{
- int rc;
- rc = lprocfs_dereg_obd(dev);
- return rc;
+ return lprocfs_obd_detach(dev);
+}
+static struct obd_ops echo_obd_ops = {
+ o_owner: THIS_MODULE,
+ o_attach: echo_attach,
+ o_detach: echo_detach,
+ o_connect: echo_connect,
+ o_disconnect: echo_disconnect,
+ o_create: echo_create,
+ o_destroy: echo_destroy,
+ o_open: echo_open,
+ o_close: echo_close,
+ o_getattr: echo_getattr,
+ o_setattr: echo_setattr,
+ o_preprw: echo_preprw,
+ o_commitrw: echo_commitrw,
+ o_setup: echo_setup,
+ o_cleanup: echo_cleanup
+};
+
+extern int echo_client_init(void);
+extern void echo_client_cleanup(void);
+
+static void
+echo_object0_pages_fini (void)
+{
+ int i;
+
+ for (i = 0; i < ECHO_OBJECT0_NPAGES; i++)
+ if (echo_object0_pages[i] != NULL) {
+ __free_pages (echo_object0_pages[i], 0);
+ echo_object0_pages[i] = NULL;
+ }
}
+static int
+echo_object0_pages_init (void)
+{
+ struct page *pg;
+ int i;
+
+ for (i = 0; i < ECHO_OBJECT0_NPAGES; i++) {
+ int gfp_mask = (i < ECHO_OBJECT0_NPAGES/2) ? GFP_KERNEL : GFP_HIGHUSER;
+
+ pg = alloc_pages (gfp_mask, 0);
+ if (pg == NULL) {
+ echo_object0_pages_fini ();
+ return (-ENOMEM);
+ }
+
+ memset (kmap (pg), 0, PAGE_SIZE);
+ kunmap (pg);
-struct obd_ops echo_obd_ops = {
- o_attach: echo_attach,
- o_detach: echo_detach,
- o_connect: echo_connect,
- o_disconnect: echo_disconnect,
- o_create: echo_create,
- o_destroy: echo_destroy,
- o_open: echo_open,
- o_close: echo_close,
- o_getattr: echo_getattr,
- o_setattr: echo_setattr,
- o_preprw: echo_preprw,
- o_commitrw: echo_commitrw,
- o_setup: echo_setup,
- o_cleanup: echo_cleanup
-};
+ echo_object0_pages[i] = pg;
+ }
+
+ return (0);
+}
static int __init obdecho_init(void)
{
+ struct lprocfs_static_vars lvars;
int rc;
-
- printk(KERN_INFO "Echo OBD driver " OBDECHO_VERSION
- " info@clusterfs.com\n");
+ printk(KERN_INFO "Lustre Echo OBD driver; info@clusterfs.com\n");
- echo_proc_init();
- rc = class_register_type(&echo_obd_ops,
- (lprocfs_vars_t*)status_class_var,
- OBD_ECHO_DEVICENAME);
- if (rc) RETURN(rc);
+ lprocfs_init_vars(&lvars);
+
+ xprocfs_init ("echo");
+
+ rc = echo_object0_pages_init ();
+ if (rc != 0)
+ goto failed_0;
- return 0;
+ rc = class_register_type(&echo_obd_ops, lvars.module_vars,
+ OBD_ECHO_DEVICENAME);
+ if (rc != 0)
+ goto failed_1;
+
+ rc = echo_client_init();
+ if (rc == 0)
+ RETURN (0);
+ class_unregister_type(OBD_ECHO_DEVICENAME);
+ failed_1:
+ echo_object0_pages_fini ();
+ failed_0:
+ xprocfs_fini ();
+
+ RETURN(rc);
}
static void __exit obdecho_exit(void)
{
-
- echo_proc_fini();
-
+ echo_client_cleanup();
class_unregister_type(OBD_ECHO_DEVICENAME);
+ echo_object0_pages_fini ();
+ xprocfs_fini ();
}
-MODULE_AUTHOR("Cluster Filesystems Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Testing Echo OBD driver " OBDECHO_VERSION);
+MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
MODULE_LICENSE("GPL");
module_init(obdecho_init);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff