-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (c) 2001-2003 Cluster File Systems, Inc.
- * Author: Peter Braam <braam@clusterfs.com>
- * Author: Andreas Dilger <adilger@clusterfs.com>
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * 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.
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * 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
+ * version 2 along with this program; If not, see
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
- * 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.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2010, 2017, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdecho/echo.c
+ *
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*/
-
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
-
-#include <linux/version.h>
-#include <linux/module.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/fs.h>
-#include <linux/stat.h>
-#include <linux/sched.h>
-#include <linux/smp_lock.h>
-#include <linux/ext2_fs.h>
-#include <linux/quotaops.h>
-#include <linux/proc_fs.h>
-#include <linux/init.h>
-#include <asm/unistd.h>
#define DEBUG_SUBSYSTEM S_ECHO
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
-#include <linux/obd_echo.h>
-#include <linux/lustre_debug.h>
-#include <linux/lustre_dlm.h>
-#include <linux/lprocfs_status.h>
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_debug.h>
+#include <lustre_dlm.h>
+#include <lprocfs_status.h>
+
+#include "echo_internal.h"
-#define ECHO_INIT_OBJID 0x1000000000000000ULL
+/*
+ * The echo objid needs to be below 2^32, because regular FID numbers are
+ * limited to 2^32 objects in f_oid for the FID_SEQ_ECHO range. b=23335
+ */
+#define ECHO_INIT_OID 0x10000000ULL
#define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
-#define ECHO_OBJECT0_NPAGES 16
-static struct page *echo_object0_pages[ECHO_OBJECT0_NPAGES];
+#define ECHO_PERSISTENT_PAGES (ECHO_PERSISTENT_SIZE >> PAGE_SHIFT)
+static struct page *echo_persistent_pages[ECHO_PERSISTENT_PAGES];
enum {
- LPROC_ECHO_READ_BYTES = 1,
- LPROC_ECHO_WRITE_BYTES = 2,
- LPROC_ECHO_LAST = LPROC_ECHO_WRITE_BYTES +1
+ LPROC_ECHO_READ_BYTES = 1,
+ LPROC_ECHO_WRITE_BYTES = 2,
+ LPROC_ECHO_LAST = LPROC_ECHO_WRITE_BYTES + 1
};
-static int echo_connect(struct lustre_handle *conn, struct obd_device *obd,
- struct obd_uuid *cluuid)
+struct echo_srv_device {
+ struct lu_device esd_dev;
+ struct lu_target esd_lut;
+};
+
+static inline struct echo_srv_device *echo_srv_dev(struct lu_device *d)
+{
+ return container_of0(d, struct echo_srv_device, esd_dev);
+}
+
+static inline struct obd_device *echo_srv_obd(struct echo_srv_device *esd)
{
- return class_connect(conn, obd, cluuid);
+ return esd->esd_dev.ld_obd;
}
-static int echo_disconnect(struct obd_export *exp, int flags)
+static int echo_connect(const struct lu_env *env,
+ struct obd_export **exp, struct obd_device *obd,
+ struct obd_uuid *cluuid, struct obd_connect_data *data,
+ void *localdata)
{
- unsigned long irqflags;
+ struct lustre_handle conn = { 0 };
+ int rc;
- LASSERT (exp != NULL);
+ data->ocd_connect_flags &= ECHO_CONNECT_SUPPORTED;
- ldlm_cancel_locks_for_export(exp);
+ if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
+ data->ocd_connect_flags2 &= ECHO_CONNECT_SUPPORTED2;
- spin_lock_irqsave(&exp->exp_lock, irqflags);
- exp->exp_flags = flags;
- spin_unlock_irqrestore(&exp->exp_lock, irqflags);
+ rc = class_connect(&conn, obd, cluuid);
+ if (rc) {
+ CERROR("can't connect %d\n", rc);
+ return rc;
+ }
+ *exp = class_conn2export(&conn);
- return class_disconnect(exp, flags);
+ return 0;
}
-static int echo_destroy_export(struct obd_export *exp)
+static int echo_disconnect(struct obd_export *exp)
{
- ENTRY;
-
- target_destroy_export(exp);
+ LASSERT(exp != NULL);
- RETURN(0);
+ return server_disconnect_export(exp);
}
- static __u64 echo_next_id(struct obd_device *obddev)
+static int echo_init_export(struct obd_export *exp)
{
- obd_id id;
-
- spin_lock(&obddev->u.echo.eo_lock);
- id = ++obddev->u.echo.eo_lastino;
- spin_unlock(&obddev->u.echo.eo_lock);
-
- return id;
+ return ldlm_init_export(exp);
}
-int echo_create(struct obd_export *exp, struct obdo *oa,
- struct lov_stripe_md **ea, struct obd_trans_info *oti)
+static int echo_destroy_export(struct obd_export *exp)
{
- struct obd_device *obd = class_exp2obd(exp);
+ ENTRY;
- if (!obd) {
- CERROR("invalid client cookie "LPX64"\n",
- exp->exp_handle.h_cookie);
- return -EINVAL;
- }
+ target_destroy_export(exp);
+ ldlm_destroy_export(exp);
- if (!(oa->o_mode && S_IFMT)) {
- CERROR("echo obd: no type!\n");
- return -ENOENT;
- }
+ RETURN(0);
+}
+
+static u64 echo_next_id(struct obd_device *obddev)
+{
+ u64 id;
- if (!(oa->o_valid & OBD_MD_FLTYPE)) {
- CERROR("invalid o_valid %08x\n", oa->o_valid);
- return -EINVAL;
- }
+ spin_lock(&obddev->u.echo.eo_lock);
+ id = ++obddev->u.echo.eo_lastino;
+ spin_unlock(&obddev->u.echo.eo_lock);
- oa->o_id = echo_next_id(obd);
- oa->o_valid = OBD_MD_FLID;
- atomic_inc(&obd->u.echo.eo_create);
+ return id;
+}
- return 0;
+static void
+echo_page_debug_setup(struct page *page, int rw, u64 id,
+ __u64 offset, int len)
+{
+ int page_offset = offset & ~PAGE_MASK;
+ char *addr = ((char *)kmap(page)) + page_offset;
+
+ if (len % OBD_ECHO_BLOCK_SIZE != 0)
+ CERROR("Unexpected block size %d\n", len);
+
+ while (len > 0) {
+ if (rw & OBD_BRW_READ)
+ block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
+ offset, id);
+ else
+ block_debug_setup(addr, OBD_ECHO_BLOCK_SIZE,
+ 0xecc0ecc0ecc0ecc0ULL,
+ 0xecc0ecc0ecc0ecc0ULL);
+
+ addr += OBD_ECHO_BLOCK_SIZE;
+ offset += OBD_ECHO_BLOCK_SIZE;
+ len -= OBD_ECHO_BLOCK_SIZE;
+ }
+
+ kunmap(page);
}
-int echo_destroy(struct obd_export *exp, struct obdo *oa,
- struct lov_stripe_md *ea, struct obd_trans_info *oti)
+static int
+echo_page_debug_check(struct page *page, u64 id,
+ __u64 offset, int len)
{
- struct obd_device *obd = class_exp2obd(exp);
+ int page_offset = offset & ~PAGE_MASK;
+ char *addr = ((char *)kmap(page)) + page_offset;
+ int rc = 0;
+ int rc2;
+
+ if (len % OBD_ECHO_BLOCK_SIZE != 0)
+ CERROR("Unexpected block size %d\n", len);
- if (!obd) {
- CERROR("invalid client cookie "LPX64"\n",
- exp->exp_handle.h_cookie);
- RETURN(-EINVAL);
- }
+ while (len > 0) {
+ rc2 = block_debug_check("echo", addr, OBD_ECHO_BLOCK_SIZE,
+ offset, id);
- if (!(oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
- RETURN(-EINVAL);
- }
+ if (rc2 != 0 && rc == 0)
+ rc = rc2;
- if (oa->o_id > obd->u.echo.eo_lastino || oa->o_id < ECHO_INIT_OBJID) {
- CERROR("bad destroy objid: "LPX64"\n", oa->o_id);
- RETURN(-EINVAL);
- }
+ addr += OBD_ECHO_BLOCK_SIZE;
+ offset += OBD_ECHO_BLOCK_SIZE;
+ len -= OBD_ECHO_BLOCK_SIZE;
+ }
- atomic_inc(&obd->u.echo.eo_destroy);
+ kunmap(page);
- return 0;
+ return rc;
}
-static int echo_getattr(struct obd_export *exp, struct obdo *oa,
- struct lov_stripe_md *md)
+static int echo_map_nb_to_lb(struct obdo *oa, struct obd_ioobj *obj,
+ struct niobuf_remote *nb, int *pages,
+ struct niobuf_local *lb, int cmd, int *left)
{
- struct obd_device *obd = class_exp2obd(exp);
- obd_id id = oa->o_id;
+ gfp_t gfp_mask = (ostid_id(&obj->ioo_oid) & 1) ?
+ GFP_HIGHUSER : GFP_KERNEL;
+ int ispersistent = ostid_id(&obj->ioo_oid) == ECHO_PERSISTENT_OBJID;
+ int debug_setup = (!ispersistent &&
+ (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
+ struct niobuf_local *res = lb;
+ u64 offset = nb->rnb_offset;
+ int len = nb->rnb_len;
+
+ while (len > 0) {
+ int plen = PAGE_SIZE - (offset & (PAGE_SIZE - 1));
+
+ if (len < plen)
+ plen = len;
+
+ /* check for local buf overflow */
+ if (*left == 0)
+ return -EINVAL;
+
+ res->lnb_file_offset = offset;
+ res->lnb_len = plen;
+ LASSERT((res->lnb_file_offset & ~PAGE_MASK) +
+ res->lnb_len <= PAGE_SIZE);
+
+ if (ispersistent &&
+ ((res->lnb_file_offset >> PAGE_SHIFT) <
+ ECHO_PERSISTENT_PAGES)) {
+ res->lnb_page =
+ echo_persistent_pages[res->lnb_file_offset >>
+ PAGE_SHIFT];
+ /* Take extra ref so __free_pages() can be called OK */
+ get_page(res->lnb_page);
+ } else {
+ res->lnb_page = alloc_page(gfp_mask);
+ if (!res->lnb_page) {
+ CERROR("can't get page for id " DOSTID"\n",
+ POSTID(&obj->ioo_oid));
+ return -ENOMEM;
+ }
+ }
+
+ CDEBUG(D_PAGE, "$$$$ get page %p @ %llu for %d\n",
+ res->lnb_page, res->lnb_file_offset, res->lnb_len);
+
+ if (cmd & OBD_BRW_READ)
+ res->lnb_rc = res->lnb_len;
+
+ if (debug_setup)
+ echo_page_debug_setup(res->lnb_page, cmd,
+ ostid_id(&obj->ioo_oid),
+ res->lnb_file_offset,
+ res->lnb_len);
+
+ offset += plen;
+ len -= plen;
+ res++;
+
+ (*left)--;
+ (*pages)++;
+ }
+
+ return 0;
+}
- if (!obd) {
- CERROR("invalid client cookie "LPX64"\n",
- exp->exp_handle.h_cookie);
- RETURN(-EINVAL);
- }
+static int echo_finalize_lb(struct obdo *oa, struct obd_ioobj *obj,
+ struct niobuf_remote *rb, int *pgs,
+ struct niobuf_local *lb, int verify)
+{
+ struct niobuf_local *res = lb;
+ u64 start = rb->rnb_offset >> PAGE_SHIFT;
+ u64 end = (rb->rnb_offset + rb->rnb_len + PAGE_SIZE - 1) >>
+ PAGE_SHIFT;
+ int count = (int)(end - start);
+ int rc = 0;
+ int i;
+
+ for (i = 0; i < count; i++, (*pgs) ++, res++) {
+ struct page *page = res->lnb_page;
+ void *addr;
+
+ if (!page) {
+ CERROR("null page objid %llu:%p, buf %d/%d\n",
+ ostid_id(&obj->ioo_oid), page, i,
+ obj->ioo_bufcnt);
+ return -EFAULT;
+ }
+
+ addr = kmap(page);
+
+ CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@%llu\n",
+ res->lnb_page, addr, res->lnb_file_offset);
+
+ if (verify) {
+ int vrc = echo_page_debug_check(page,
+ ostid_id(&obj->ioo_oid),
+ res->lnb_file_offset,
+ res->lnb_len);
+ /* check all the pages always */
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+
+ kunmap(page);
+ /* NB see comment above regarding persistent pages */
+ __free_page(page);
+ }
+
+ return rc;
+}
- if (!(oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
- RETURN(-EINVAL);
- }
+static int echo_preprw(const struct lu_env *env, int cmd,
+ struct obd_export *export, struct obdo *oa,
+ int objcount, struct obd_ioobj *obj,
+ struct niobuf_remote *nb, int *pages,
+ struct niobuf_local *res)
+{
+ struct obd_device *obd;
+ int tot_bytes = 0;
+ int rc = 0;
+ int i, left;
- obdo_cpy_md(oa, &obd->u.echo.oa, oa->o_valid);
- oa->o_id = id;
+ ENTRY;
- return 0;
-}
+ obd = export->exp_obd;
+ if (!obd)
+ RETURN(-EINVAL);
-static int echo_setattr(struct obd_export *exp, struct obdo *oa,
- struct lov_stripe_md *md, struct obd_trans_info *oti)
-{
- struct obd_device *obd = class_exp2obd(exp);
+ /* Temp fix to stop falling foul of osc_announce_cached() */
+ oa->o_valid &= ~(OBD_MD_FLBLOCKS | OBD_MD_FLGRANT);
- if (!obd) {
- CERROR("invalid client cookie "LPX64"\n",
- exp->exp_handle.h_cookie);
- RETURN(-EINVAL);
- }
+ memset(res, 0, sizeof(*res) * *pages);
- if (!(oa->o_valid & OBD_MD_FLID)) {
- CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
- RETURN(-EINVAL);
- }
+ CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
+ cmd == OBD_BRW_READ ? "reading" : "writing", objcount, *pages);
- memcpy(&obd->u.echo.oa, oa, sizeof(*oa));
+ left = *pages;
+ *pages = 0;
- atomic_inc(&obd->u.echo.eo_setattr);
+ for (i = 0; i < objcount; i++, obj++) {
+ int j;
- return 0;
-}
+ for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++) {
+ rc = echo_map_nb_to_lb(oa, obj, nb, pages,
+ res + *pages, cmd, &left);
+ if (rc)
+ GOTO(preprw_cleanup, rc);
-/* This allows us to verify that desc_private is passed unmolested */
-#define DESC_PRIV 0x10293847
+ tot_bytes += nb->rnb_len;
+ }
+ }
-int echo_preprw(int cmd, struct obd_export *export, struct obdo *oa,
- int objcount, struct obd_ioobj *obj, int niocount,
- struct niobuf_remote *nb, struct niobuf_local *res,
- struct obd_trans_info *oti)
-{
- struct obd_device *obd;
- struct niobuf_local *r = res;
- int tot_bytes = 0;
- int rc = 0;
- int i;
- ENTRY;
-
- obd = export->exp_obd;
- if (obd == NULL)
- RETURN(-EINVAL);
-
- /* Temp fix to stop falling foul of osc_announce_cached() */
- oa->o_valid &= ~(OBD_MD_FLBLOCKS | OBD_MD_FLGRANT);
-
- memset(res, 0, sizeof(*res) * niocount);
-
- CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
- cmd == OBD_BRW_READ ? "reading" : "writing", objcount, niocount);
-
- if (oti)
- oti->oti_handle = (void *)DESC_PRIV;
-
- for (i = 0; i < objcount; i++, obj++) {
- int gfp_mask = (obj->ioo_id & 1) ? GFP_HIGHUSER : GFP_KERNEL;
- int isobj0 = obj->ioo_id == 0;
- int verify = !isobj0;
- int j;
-
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, r++) {
-
- 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 %u/%u for id "
- LPU64"\n",
- j, obj->ioo_bufcnt, obj->ioo_id);
- GOTO(preprw_cleanup, rc = -ENOMEM);
- }
- }
-
- tot_bytes += nb->len;
-
- atomic_inc(&obd->u.echo.eo_prep);
-
- r->offset = nb->offset;
- r->len = nb->len;
- LASSERT((r->offset & ~PAGE_MASK) + r->len <= PAGE_SIZE);
-
- CDEBUG(D_PAGE, "$$$$ get page %p @ "LPU64" for %d\n",
- r->page, r->offset, r->len);
-
- if (cmd & OBD_BRW_READ) {
- r->rc = r->len;
- if (verify) {
- page_debug_setup(kmap (r->page), r->len,
- r->offset,obj->ioo_id);
- kunmap (r->page);
- }
- r->rc = r->len;
- } else {
- if (verify) {
- page_debug_setup(kmap (r->page), r->len,
- 0xecc0ecc0ecc0ecc0ULL,
- 0xecc0ecc0ecc0ecc0ULL);
- kunmap (r->page);
- }
- }
- }
- }
- if (cmd & OBD_BRW_READ)
- lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_READ_BYTES,
- tot_bytes);
- else
- lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
- tot_bytes);
-
- CDEBUG(D_PAGE, "%d pages allocated after prep\n",
- atomic_read(&obd->u.echo.eo_prep));
-
- RETURN(0);
+ atomic_add(*pages, &obd->u.echo.eo_prep);
+
+ if (cmd & OBD_BRW_READ)
+ lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_READ_BYTES,
+ tot_bytes);
+ else
+ lprocfs_counter_add(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
+ tot_bytes);
+
+ CDEBUG(D_PAGE, "%d pages allocated after prep\n",
+ atomic_read(&obd->u.echo.eo_prep));
+
+ RETURN(0);
preprw_cleanup:
- /* It is possible that we would rather handle errors by allow
- * any already-set-up pages to complete, rather than tearing them
- * all down again. I believe that this is what the in-kernel
- * prep/commit operations do.
- */
- 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);
- }
- memset(res, 0, sizeof(*res) * niocount);
-
- return rc;
+ /*
+ * It is possible that we would rather handle errors by allow
+ * any already-set-up pages to complete, rather than tearing them
+ * all down again. I believe that this is what the in-kernel
+ * prep/commit operations do.
+ */
+ CERROR("cleaning up %u pages (%d obdos)\n", *pages, objcount);
+ for (i = 0; i < *pages; i++) {
+ kunmap(res[i].lnb_page);
+ /*
+ * NB if this is a persistent page, __free_page() will just
+ * lose the extra ref gained above
+ */
+ __free_page(res[i].lnb_page);
+ res[i].lnb_page = NULL;
+ atomic_dec(&obd->u.echo.eo_prep);
+ }
+
+ return rc;
}
-int echo_commitrw(int cmd, struct obd_export *export, struct obdo *oa,
- int objcount, struct obd_ioobj *obj, int niocount,
- struct niobuf_local *res, struct obd_trans_info *oti)
+static int echo_commitrw(const struct lu_env *env, int cmd,
+ struct obd_export *export, struct obdo *oa,
+ int objcount, struct obd_ioobj *obj,
+ struct niobuf_remote *rb, int niocount,
+ struct niobuf_local *res, int rc)
{
- struct obd_device *obd;
- struct niobuf_local *r = res;
- int i, vrc = 0, rc = 0;
- ENTRY;
-
- obd = export->exp_obd;
- if (obd == NULL)
- RETURN(-EINVAL);
-
- if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
- CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
- objcount, niocount);
- } else {
- CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
- objcount, niocount);
- }
-
- if (niocount && !r) {
- CERROR("NULL res niobuf with niocount %d\n", niocount);
- RETURN(-EINVAL);
- }
-
- LASSERT(oti == NULL || oti->oti_handle == (void *)DESC_PRIV);
-
- for (i = 0; i < objcount; i++, obj++) {
- int verify = obj->ioo_id != 0;
- int j;
-
- for (j = 0 ; j < obj->ioo_bufcnt ; j++, r++) {
- struct page *page = r->page;
- void *addr;
-
- if (page == NULL) {
- CERROR("null page objid "LPU64":%p, buf %d/%d\n",
- obj->ioo_id, page, j, obj->ioo_bufcnt);
- GOTO(commitrw_cleanup, rc = -EFAULT);
- }
-
- addr = kmap(page);
-
- CDEBUG(D_PAGE, "$$$$ use page %p, addr %p@"LPU64"\n",
- r->page, addr, r->offset);
-
- 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 */
- __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(rc);
+ struct obd_device *obd;
+ int pgs = 0;
+ int i;
+
+ ENTRY;
+
+ obd = export->exp_obd;
+ if (!obd)
+ RETURN(-EINVAL);
+
+ if (rc)
+ GOTO(commitrw_cleanup, rc);
+
+ if ((cmd & OBD_BRW_RWMASK) == OBD_BRW_READ) {
+ CDEBUG(D_PAGE, "reading %d obdos with %d IOs\n",
+ objcount, niocount);
+ } else {
+ CDEBUG(D_PAGE, "writing %d obdos with %d IOs\n",
+ objcount, niocount);
+ }
+
+ if (niocount && !res) {
+ CERROR("NULL res niobuf with niocount %d\n", niocount);
+ RETURN(-EINVAL);
+ }
+
+ for (i = 0; i < objcount; i++, obj++) {
+ int verify = (rc == 0 &&
+ ostid_id(&obj->ioo_oid) != ECHO_PERSISTENT_OBJID &&
+ (oa->o_valid & OBD_MD_FLFLAGS) != 0 &&
+ (oa->o_flags & OBD_FL_DEBUG_CHECK) != 0);
+ int j;
+
+ for (j = 0 ; j < obj->ioo_bufcnt ; j++, rb++) {
+ int vrc = echo_finalize_lb(oa, obj, rb, &pgs, &res[pgs],
+ verify);
+ if (vrc == 0)
+ continue;
+
+ if (vrc == -EFAULT)
+ GOTO(commitrw_cleanup, rc = vrc);
+
+ if (rc == 0)
+ rc = vrc;
+ }
+ }
+
+ atomic_sub(pgs, &obd->u.echo.eo_prep);
+
+ CDEBUG(D_PAGE, "%d pages remain after commit\n",
+ atomic_read(&obd->u.echo.eo_prep));
+ RETURN(rc);
commitrw_cleanup:
- CERROR("cleaning up %ld pages (%d obdos)\n",
- niocount - (long)(r - res) - 1, objcount);
- while (++r < res + niocount) {
- struct page *page = r->page;
-
- /* NB see comment above regarding object0 pages */
- __free_pages(page, 0);
- atomic_dec(&obd->u.echo.eo_prep);
- }
- return rc;
+ atomic_sub(pgs, &obd->u.echo.eo_prep);
+
+ CERROR("cleaning up %d pages (%d obdos)\n",
+ niocount - pgs - 1, objcount);
+
+ while (pgs < niocount) {
+ struct page *page = res[pgs++].lnb_page;
+
+ if (!page)
+ continue;
+
+ /* NB see comment above regarding persistent pages */
+ __free_page(page);
+ atomic_dec(&obd->u.echo.eo_prep);
+ }
+ return rc;
}
-static int echo_setup(struct obd_device *obddev, obd_count len, void *buf)
+LPROC_SEQ_FOPS_RO_TYPE(echo, uuid);
+static struct lprocfs_vars lprocfs_echo_obd_vars[] = {
+ { .name = "uuid",
+ .fops = &echo_uuid_fops },
+ { NULL }
+};
+
+struct obd_ops echo_obd_ops = {
+ .o_owner = THIS_MODULE,
+ .o_connect = echo_connect,
+ .o_disconnect = echo_disconnect,
+ .o_init_export = echo_init_export,
+ .o_destroy_export = echo_destroy_export,
+ .o_preprw = echo_preprw,
+ .o_commitrw = echo_commitrw,
+};
+
+/**
+ * Echo Server request handler for OST_CREATE RPC.
+ *
+ * This is part of request processing. Its simulates the object
+ * creation on OST.
+ *
+ * \param[in] tsi target session environment for this request
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int esd_create_hdl(struct tgt_session_info *tsi)
{
- ENTRY;
+ const struct obdo *oa = &tsi->tsi_ost_body->oa;
+ struct obd_device *obd = tsi->tsi_exp->exp_obd;
+ struct ost_body *repbody;
+ struct obdo *rep_oa;
+
+ ENTRY;
- spin_lock_init(&obddev->u.echo.eo_lock);
- obddev->u.echo.eo_lastino = ECHO_INIT_OBJID;
+ repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
+ if (!repbody)
+ RETURN(-ENOMEM);
- obddev->obd_namespace =
- ldlm_namespace_new("echo-tgt", LDLM_NAMESPACE_SERVER);
- if (obddev->obd_namespace == NULL) {
- LBUG();
- RETURN(-ENOMEM);
- }
+ if (!(oa->o_mode & S_IFMT)) {
+ CERROR("%s: no type is set in obdo!\n",
+ tsi->tsi_exp->exp_obd->obd_name);
+ RETURN(-ENOENT);
+ }
- ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
- "echo_ldlm_cb_client", &obddev->obd_ldlm_client);
- RETURN(0);
+ if (!(oa->o_valid & OBD_MD_FLTYPE)) {
+ CERROR("%s: invalid o_valid in obdo: %#llx\n",
+ tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ rep_oa = &repbody->oa;
+
+ if (!fid_seq_is_echo(ostid_seq(&oa->o_oi))) {
+ CERROR("%s: invalid seq %#llx\n",
+ tsi->tsi_exp->exp_obd->obd_name, ostid_seq(&oa->o_oi));
+ return -EINVAL;
+ }
+
+ ostid_set_seq_echo(&rep_oa->o_oi);
+ ostid_set_id(&rep_oa->o_oi, echo_next_id(obd));
+
+ CDEBUG(D_INFO, "%s: Create object "DOSTID"\n",
+ tsi->tsi_exp->exp_obd->obd_name, POSTID(&rep_oa->o_oi));
+
+ rep_oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
+
+ RETURN(0);
}
-static int echo_cleanup(struct obd_device *obddev, int flags)
+/**
+ * Echo Server request handler for OST_DESTROY RPC.
+ *
+ * This is Echo Server part of request handling. It simulates the objects
+ * destroy on OST.
+ *
+ * \param[in] tsi target session environment for this request
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int esd_destroy_hdl(struct tgt_session_info *tsi)
{
- int leaked;
- ENTRY;
+ const struct obdo *oa = &tsi->tsi_ost_body->oa;
+ struct obd_device *obd = tsi->tsi_exp->exp_obd;
+ struct ost_body *repbody;
+ u64 oid;
+
+ ENTRY;
+
+ oid = ostid_id(&oa->o_oi);
+ LASSERT(oid != 0);
- ldlm_namespace_free(obddev->obd_namespace, flags & OBD_OPT_FORCE);
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("%s: obdo missing FLID valid flag: %#llx\n",
+ tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
+ RETURN(-EINVAL);
+ }
- leaked = atomic_read(&obddev->u.echo.eo_prep);
- if (leaked != 0)
- CERROR("%d prep/commitrw pages leaked\n", leaked);
+ repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
- RETURN(0);
+ if (ostid_id(&oa->o_oi) > obd->u.echo.eo_lastino ||
+ ostid_id(&oa->o_oi) < ECHO_INIT_OID) {
+ CERROR("%s: bad objid to destroy: "DOSTID"\n",
+ tsi->tsi_exp->exp_obd->obd_name, POSTID(&oa->o_oi));
+ RETURN(-EINVAL);
+ }
+
+ CDEBUG(D_INFO, "%s: Destroy object "DOSTID"\n",
+ tsi->tsi_exp->exp_obd->obd_name, POSTID(&oa->o_oi));
+
+ repbody->oa.o_oi = oa->o_oi;
+ RETURN(0);
}
-int echo_attach(struct obd_device *obd, obd_count len, void *data)
+/**
+ * Echo Server request handler for OST_GETATTR RPC.
+ *
+ * This is Echo Server part of request handling. It returns an object
+ * attributes to the client. All objects have the same attributes in
+ * Echo Server.
+ *
+ * \param[in] tsi target session environment for this request
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int esd_getattr_hdl(struct tgt_session_info *tsi)
{
- struct lprocfs_static_vars lvars;
- int rc;
-
- lprocfs_init_vars(echo, &lvars);
- rc = lprocfs_obd_attach(obd, lvars.obd_vars);
- if (rc != 0)
- return rc;
- rc = lprocfs_alloc_obd_stats(obd, LPROC_ECHO_LAST);
- if (rc != 0)
- return rc;
-
- lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_READ_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "read_bytes", "bytes");
- lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
- LPROCFS_CNTR_AVGMINMAX, "write_bytes", "bytes");
- return rc;
+ const struct obdo *oa = &tsi->tsi_ost_body->oa;
+ struct obd_device *obd = tsi->tsi_exp->exp_obd;
+ struct ost_body *repbody;
+
+ ENTRY;
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("%s: obdo missing FLID valid flag: %#llx\n",
+ tsi->tsi_exp->exp_obd->obd_name, oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
+ if (!repbody)
+ RETURN(-ENOMEM);
+
+ repbody->oa.o_oi = oa->o_oi;
+ repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
+
+ obdo_cpy_md(&repbody->oa, &obd->u.echo.eo_oa, oa->o_valid);
+
+ repbody->oa.o_valid |= OBD_MD_FLFLAGS;
+ repbody->oa.o_flags = OBD_FL_FLUSH;
+
+ RETURN(0);
}
-int echo_detach(struct obd_device *dev)
+/**
+ * Echo Server request handler for OST_SETATTR RPC.
+ *
+ * This is Echo Server part of request handling. It sets common
+ * attributes from request to the Echo Server objects.
+ *
+ * \param[in] tsi target session environment for this request
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int esd_setattr_hdl(struct tgt_session_info *tsi)
{
- lprocfs_free_obd_stats(dev);
- return lprocfs_obd_detach(dev);
+ struct ost_body *body = tsi->tsi_ost_body;
+ struct obd_device *obd = tsi->tsi_exp->exp_obd;
+ struct ost_body *repbody;
+
+ ENTRY;
+
+ if (!(body->oa.o_valid & OBD_MD_FLID)) {
+ CERROR("%s: obdo missing FLID valid flag: %#llx\n",
+ tsi->tsi_exp->exp_obd->obd_name,
+ body->oa.o_valid);
+ RETURN(-EINVAL);
+ }
+
+ repbody = req_capsule_server_get(tsi->tsi_pill, &RMF_OST_BODY);
+ if (!repbody)
+ RETURN(-ENOMEM);
+
+ repbody->oa.o_oi = body->oa.o_oi;
+ repbody->oa.o_valid = OBD_MD_FLID | OBD_MD_FLGROUP;
+
+ obd->u.echo.eo_oa = body->oa;
+
+ RETURN(0);
}
-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_destroy_export: echo_destroy_export,
- o_create: echo_create,
- o_destroy: echo_destroy,
- o_getattr: echo_getattr,
- o_setattr: echo_setattr,
- o_preprw: echo_preprw,
- o_commitrw: echo_commitrw,
- o_setup: echo_setup,
- o_cleanup: echo_cleanup
+#define OBD_FAIL_OST_READ_NET OBD_FAIL_OST_BRW_NET
+#define OBD_FAIL_OST_WRITE_NET OBD_FAIL_OST_BRW_NET
+#define OST_BRW_READ OST_READ
+#define OST_BRW_WRITE OST_WRITE
+
+/**
+ * Table of Echo Server specific request handlers
+ *
+ * This table contains all opcodes accepted by Echo Server and
+ * specifies handlers for them. The tgt_request_handler()
+ * uses such table from each target to process incoming
+ * requests.
+ */
+static struct tgt_handler esd_tgt_handlers[] = {
+TGT_RPC_HANDLER(OST_FIRST_OPC, 0, OST_CONNECT, tgt_connect,
+ &RQF_CONNECT, LUSTRE_OBD_VERSION),
+TGT_RPC_HANDLER(OST_FIRST_OPC, 0, OST_DISCONNECT, tgt_disconnect,
+ &RQF_OST_DISCONNECT, LUSTRE_OBD_VERSION),
+TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_GETATTR, esd_getattr_hdl),
+TGT_OST_HDL(HAS_BODY | HAS_REPLY | IS_MUTABLE, OST_SETATTR,
+ esd_setattr_hdl),
+TGT_OST_HDL(HAS_REPLY | IS_MUTABLE, OST_CREATE, esd_create_hdl),
+TGT_OST_HDL(HAS_REPLY | IS_MUTABLE, OST_DESTROY, esd_destroy_hdl),
+TGT_OST_HDL(HAS_BODY | HAS_REPLY, OST_BRW_READ, tgt_brw_read),
+TGT_OST_HDL(HAS_BODY | IS_MUTABLE, OST_BRW_WRITE, tgt_brw_write),
};
-extern int echo_client_init(void);
-extern void echo_client_exit(void);
+static struct tgt_opc_slice esd_common_slice[] = {
+ {
+ .tos_opc_start = OST_FIRST_OPC,
+ .tos_opc_end = OST_LAST_OPC,
+ .tos_hs = esd_tgt_handlers
+ },
+ {
+ .tos_opc_start = OBD_FIRST_OPC,
+ .tos_opc_end = OBD_LAST_OPC,
+ .tos_hs = tgt_obd_handlers
+ },
+ {
+ .tos_opc_start = LDLM_FIRST_OPC,
+ .tos_opc_end = LDLM_LAST_OPC,
+ .tos_hs = tgt_dlm_handlers
+ },
+ {
+ .tos_opc_start = SEC_FIRST_OPC,
+ .tos_opc_end = SEC_LAST_OPC,
+ .tos_hs = tgt_sec_ctx_handlers
+ },
+ {
+ .tos_hs = NULL
+ }
+};
-static void
-echo_object0_pages_fini (void)
-{
- int i;
+/**
+ * lu_device_operations matrix for ECHO SRV device is NULL,
+ * this device is just serving incoming requests immediately
+ * without building a stack of lu_devices.
+ */
+static struct lu_device_operations echo_srv_lu_ops = { 0 };
- 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;
- }
+/**
+ * Initialize Echo Server device with parameters in the config log \a cfg.
+ *
+ * This is the main starting point of Echo Server initialization. It fills all
+ * parameters with their initial values and starts Echo Server.
+ *
+ * \param[in] env execution environment
+ * \param[in] m Echo Server device
+ * \param[in] ldt LU device type of Echo Server
+ * \param[in] cfg configuration log
+ *
+ * \retval 0 if successful
+ * \retval negative value on error
+ */
+static int echo_srv_init0(const struct lu_env *env,
+ struct echo_srv_device *esd,
+ struct lu_device_type *ldt, struct lustre_cfg *cfg)
+{
+ const char *dev = lustre_cfg_string(cfg, 0);
+ struct obd_device *obd;
+ char ns_name[48];
+ int rc;
+
+ ENTRY;
+
+ obd = class_name2obd(dev);
+ if (!obd) {
+ CERROR("Cannot find obd with name %s\n", dev);
+ RETURN(-ENODEV);
+ }
+
+ spin_lock_init(&obd->u.echo.eo_lock);
+ obd->u.echo.eo_lastino = ECHO_INIT_OID;
+
+ esd->esd_dev.ld_ops = &echo_srv_lu_ops;
+ esd->esd_dev.ld_obd = obd;
+ /* set this lu_device to obd, because error handling need it */
+ obd->obd_lu_dev = &esd->esd_dev;
+
+ /* No connection accepted until configurations will finish */
+ spin_lock(&obd->obd_dev_lock);
+ obd->obd_no_conn = 1;
+ spin_unlock(&obd->obd_dev_lock);
+
+ /* non-replayable target */
+ obd->obd_replayable = 0;
+
+ snprintf(ns_name, sizeof(ns_name), "echotgt-%s", obd->obd_uuid.uuid);
+ obd->obd_namespace = ldlm_namespace_new(obd, ns_name,
+ LDLM_NAMESPACE_SERVER,
+ LDLM_NAMESPACE_MODEST,
+ LDLM_NS_TYPE_OST);
+ if (!obd->obd_namespace)
+ RETURN(-ENOMEM);
+
+ obd->obd_vars = lprocfs_echo_obd_vars;
+ if (!lprocfs_obd_setup(obd, true) &&
+ lprocfs_alloc_obd_stats(obd, LPROC_ECHO_LAST) == 0) {
+ lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_READ_BYTES,
+ LPROCFS_CNTR_AVGMINMAX,
+ "read_bytes", "bytes");
+ lprocfs_counter_init(obd->obd_stats, LPROC_ECHO_WRITE_BYTES,
+ LPROCFS_CNTR_AVGMINMAX,
+ "write_bytes", "bytes");
+ }
+
+ ptlrpc_init_client(LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
+ "echo_ldlm_cb_client", &obd->obd_ldlm_client);
+
+ rc = tgt_init(env, &esd->esd_lut, obd, NULL, esd_common_slice,
+ OBD_FAIL_OST_ALL_REQUEST_NET,
+ OBD_FAIL_OST_ALL_REPLY_NET);
+ if (rc)
+ GOTO(err_out, rc);
+
+ spin_lock(&obd->obd_dev_lock);
+ obd->obd_no_conn = 0;
+ spin_unlock(&obd->obd_dev_lock);
+
+ RETURN(0);
+
+err_out:
+ ldlm_namespace_free(obd->obd_namespace, NULL, obd->obd_force);
+ obd->obd_namespace = NULL;
+
+ lprocfs_obd_cleanup(obd);
+ lprocfs_free_obd_stats(obd);
+ RETURN(rc);
}
-static int
-echo_object0_pages_init (void)
+/**
+ * Stop the Echo Server device.
+ *
+ * This function stops the Echo Server device and all its subsystems.
+ * This is the end of Echo Server lifecycle.
+ *
+ * \param[in] env execution environment
+ * \param[in] esd ESD device
+ */
+static void echo_srv_fini(const struct lu_env *env,
+ struct echo_srv_device *esd)
{
- struct page *pg;
- int i;
+ struct obd_device *obd = echo_srv_obd(esd);
+ struct lu_device *d = &esd->esd_dev;
+ int leaked;
+
+ ENTRY;
- for (i = 0; i < ECHO_OBJECT0_NPAGES; i++) {
- int gfp_mask = (i < ECHO_OBJECT0_NPAGES/2) ?
- GFP_KERNEL : GFP_HIGHUSER;
+ class_disconnect_exports(obd);
+ if (obd->obd_namespace)
+ ldlm_namespace_free_prior(obd->obd_namespace, NULL,
+ obd->obd_force);
- pg = alloc_pages (gfp_mask, 0);
- if (pg == NULL) {
- echo_object0_pages_fini ();
- return (-ENOMEM);
- }
+ obd_exports_barrier(obd);
+ obd_zombie_barrier();
- memset (kmap (pg), 0, PAGE_SIZE);
- kunmap (pg);
+ tgt_fini(env, &esd->esd_lut);
- echo_object0_pages[i] = pg;
- }
+ if (obd->obd_namespace) {
+ ldlm_namespace_free_post(obd->obd_namespace);
+ obd->obd_namespace = NULL;
+ }
+
+ lprocfs_obd_cleanup(obd);
+ lprocfs_free_obd_stats(obd);
+
+ leaked = atomic_read(&obd->u.echo.eo_prep);
+ if (leaked != 0)
+ CERROR("%d prep/commitrw pages leaked\n", leaked);
+
+ LASSERT(atomic_read(&d->ld_ref) == 0);
+ EXIT;
+}
- return (0);
+/**
+ * Implementation of lu_device_type_operations::ldto_device_fini.
+ *
+ * Finalize device. Dual to echo_srv_device_init(). It is called from
+ * obd_precleanup() and stops the current device.
+ *
+ * \param[in] env execution environment
+ * \param[in] d LU device of ESD
+ *
+ * \retval NULL
+ */
+static struct lu_device *echo_srv_device_fini(const struct lu_env *env,
+ struct lu_device *d)
+{
+ ENTRY;
+ echo_srv_fini(env, echo_srv_dev(d));
+ RETURN(NULL);
}
-static int __init obdecho_init(void)
+/**
+ * Implementation of lu_device_type_operations::ldto_device_free.
+ *
+ * Free Echo Server device. Dual to echo_srv_device_alloc().
+ *
+ * \param[in] env execution environment
+ * \param[in] d LU device of ESD
+ *
+ * \retval NULL
+ */
+static struct lu_device *echo_srv_device_free(const struct lu_env *env,
+ struct lu_device *d)
{
- struct lprocfs_static_vars lvars;
- int rc;
+ struct echo_srv_device *esd = echo_srv_dev(d);
- printk(KERN_INFO "Lustre: Echo OBD driver; info@clusterfs.com\n");
+ lu_device_fini(&esd->esd_dev);
+ OBD_FREE_PTR(esd);
+ RETURN(NULL);
+}
- lprocfs_init_vars(echo, &lvars);
+/**
+ * Implementation of lu_device_type_operations::ldto_device_alloc.
+ *
+ * This function allocates the new Echo Server device. It is called from
+ * obd_setup() if OBD device had lu_device_type defined.
+ *
+ * \param[in] env execution environment
+ * \param[in] t lu_device_type of ESD device
+ * \param[in] cfg configuration log
+ *
+ * \retval pointer to the lu_device of just allocated OFD
+ * \retval ERR_PTR of return value on error
+ */
+static struct lu_device *echo_srv_device_alloc(const struct lu_env *env,
+ struct lu_device_type *t,
+ struct lustre_cfg *cfg)
+{
+ struct echo_srv_device *esd;
+ struct lu_device *l;
+ int rc;
+
+ OBD_ALLOC_PTR(esd);
+ if (!esd)
+ return ERR_PTR(-ENOMEM);
+
+ l = &esd->esd_dev;
+ lu_device_init(l, t);
+ rc = echo_srv_init0(env, esd, t, cfg);
+ if (rc != 0) {
+ echo_srv_device_free(env, l);
+ l = ERR_PTR(rc);
+ }
+
+ return l;
+}
- rc = echo_object0_pages_init ();
- if (rc != 0)
- goto failed_0;
+static const struct lu_device_type_operations echo_srv_type_ops = {
+ .ldto_device_alloc = echo_srv_device_alloc,
+ .ldto_device_free = echo_srv_device_free,
+ .ldto_device_fini = echo_srv_device_fini
+};
- rc = class_register_type(&echo_obd_ops, lvars.module_vars,
- OBD_ECHO_DEVICENAME);
- if (rc != 0)
- goto failed_1;
+struct lu_device_type echo_srv_type = {
+ .ldt_tags = LU_DEVICE_DT,
+ .ldt_name = LUSTRE_ECHO_NAME,
+ .ldt_ops = &echo_srv_type_ops,
+ .ldt_ctx_tags = LCT_DT_THREAD,
+};
- rc = echo_client_init();
- if (rc == 0)
- RETURN (0);
+void echo_persistent_pages_fini(void)
+{
+ int i;
- class_unregister_type(OBD_ECHO_DEVICENAME);
- failed_1:
- echo_object0_pages_fini ();
- failed_0:
- RETURN(rc);
+ for (i = 0; i < ECHO_PERSISTENT_PAGES; i++)
+ if (echo_persistent_pages[i]) {
+ __free_page(echo_persistent_pages[i]);
+ echo_persistent_pages[i] = NULL;
+ }
}
-static void /*__exit*/ obdecho_exit(void)
+int echo_persistent_pages_init(void)
{
- echo_client_exit();
- class_unregister_type(OBD_ECHO_DEVICENAME);
- echo_object0_pages_fini ();
-}
+ struct page *pg;
+ int i;
-MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
-MODULE_LICENSE("GPL");
+ for (i = 0; i < ECHO_PERSISTENT_PAGES; i++) {
+ gfp_t gfp_mask = (i < ECHO_PERSISTENT_PAGES / 2) ?
+ GFP_KERNEL : GFP_HIGHUSER;
-module_init(obdecho_init);
-module_exit(obdecho_exit);
+ pg = alloc_page(gfp_mask);
+ if (!pg) {
+ echo_persistent_pages_fini();
+ return -ENOMEM;
+ }
+
+ memset(kmap(pg), 0, PAGE_SIZE);
+ kunmap(pg);
+
+ echo_persistent_pages[i] = pg;
+ }
+
+ return 0;
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff