/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * linux/fs/ext2_obd/ext2_obd.c
+ * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * Author: Peter Braam <braam@clusterfs.com>
+ * Author: Andreas Dilger <adilger@clusterfs.com>
*
- * Copyright (C) 2001 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>
+ * 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.
*/
-#define EXPORT_SYMTAB
+#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/locks.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>
+
+#define ECHO_INIT_OBJID 0x1000000000000000ULL
+#define ECHO_HANDLE_MAGIC 0xabcd0123fedc9876ULL
-extern struct obd_device obd_dev[MAX_OBD_DEVICES];
-static struct obdo OA;
-static obd_count GEN;
-static long echo_pages = 0;
+#define ECHO_PERSISTENT_PAGES (ECHO_PERSISTENT_SIZE/PAGE_SIZE)
+static struct page *echo_persistent_pages[ECHO_PERSISTENT_PAGES];
-static int echo_connect(struct obd_conn *conn)
+enum {
+ 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)
{
- int rc;
+ return class_connect(conn, obd, cluuid);
+}
- MOD_INC_USE_COUNT;
- rc = gen_connect(conn);
+static int echo_disconnect(struct obd_export *exp, int flags)
+{
+ unsigned long irqflags;
- if (rc)
- MOD_DEC_USE_COUNT;
+ LASSERT (exp != NULL);
- return rc;
+ ldlm_cancel_locks_for_export(exp);
+
+ spin_lock_irqsave(&exp->exp_lock, irqflags);
+ exp->exp_flags = flags;
+ spin_unlock_irqrestore(&exp->exp_lock, irqflags);
+
+ return class_disconnect(exp, flags);
}
-static int echo_disconnect(struct obd_conn *conn)
+static int echo_destroy_export(struct obd_export *exp)
{
- int rc;
+ ENTRY;
+
+ target_destroy_export(exp);
+
+ RETURN(0);
+}
- rc = gen_disconnect(conn);
- if (!rc)
- MOD_DEC_USE_COUNT;
+ static __u64 echo_next_id(struct obd_device *obddev)
+{
+ obd_id id;
- return rc;
+ spin_lock(&obddev->u.echo.eo_lock);
+ id = ++obddev->u.echo.eo_lastino;
+ spin_unlock(&obddev->u.echo.eo_lock);
+
+ return id;
}
-static int echo_getattr(struct obd_conn *conn, struct obdo *oa)
+int echo_create(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md **ea, struct obd_trans_info *oti)
{
- memcpy(oa, &OA, sizeof(*oa));
- oa->o_mode = ++GEN;
+ struct obd_device *obd = class_exp2obd(exp);
+
+ if (!obd) {
+ CERROR("invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ return -EINVAL;
+ }
+
+ if (!(oa->o_mode && S_IFMT)) {
+ CERROR("echo obd: no type!\n");
+ return -ENOENT;
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLTYPE)) {
+ CERROR("invalid o_valid %08x\n", oa->o_valid);
+ return -EINVAL;
+ }
+
+ oa->o_id = echo_next_id(obd);
+ oa->o_valid = OBD_MD_FLID;
+ atomic_inc(&obd->u.echo.eo_create);
return 0;
}
-int echo_preprw(int cmd, struct obd_conn *conn, int objcount,
- struct obd_ioobj *obj, int niocount, struct niobuf_remote *nb,
- struct niobuf_local *res, void **desc_private)
+int echo_destroy(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *ea, struct obd_trans_info *oti)
{
+ struct obd_device *obd = class_exp2obd(exp);
+
+ if (!obd) {
+ CERROR("invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ RETURN(-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ 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);
+ }
+
+ atomic_inc(&obd->u.echo.eo_destroy);
+
+ return 0;
+}
+
+static int echo_getattr(struct obd_export *exp, struct obdo *oa,
+ struct lov_stripe_md *md)
+{
+ struct obd_device *obd = class_exp2obd(exp);
+ obd_id id = oa->o_id;
+
+ if (!obd) {
+ CERROR("invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ RETURN(-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ obdo_cpy_md(oa, &obd->u.echo.oa, oa->o_valid);
+ oa->o_id = id;
+
+ return 0;
+}
+
+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);
+
+ if (!obd) {
+ CERROR("invalid client cookie "LPX64"\n",
+ exp->exp_handle.h_cookie);
+ RETURN(-EINVAL);
+ }
+
+ if (!(oa->o_valid & OBD_MD_FLID)) {
+ CERROR("obdo missing FLID valid flag: %08x\n", oa->o_valid);
+ RETURN(-EINVAL);
+ }
+
+ memcpy(&obd->u.echo.oa, oa, sizeof(*oa));
+
+ atomic_inc(&obd->u.echo.eo_setattr);
+
+ return 0;
+}
+
+static void
+echo_page_debug_setup(struct page *page, int rw, obd_id id,
+ __u64 offset, int len)
+{
+ int page_offset = offset & (PAGE_SIZE - 1);
+ 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);
+}
+
+static int
+echo_page_debug_check(struct page *page, obd_id id,
+ __u64 offset, int len)
+{
+ int page_offset = offset & (PAGE_SIZE - 1);
+ 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);
+
+ while (len > 0) {
+ rc2 = block_debug_check("echo", addr, OBD_ECHO_BLOCK_SIZE,
+ offset, id);
+
+ if (rc2 != 0 && rc == 0)
+ rc = rc2;
+
+ addr += OBD_ECHO_BLOCK_SIZE;
+ offset += OBD_ECHO_BLOCK_SIZE;
+ len -= OBD_ECHO_BLOCK_SIZE;
+ }
+
+ kunmap(page);
+
+ return (rc);
+}
+
+/* This allows us to verify that desc_private is passed unmolested */
+#define DESC_PRIV 0x10293847
+
+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 ispersistent = obj->ioo_id == ECHO_PERSISTENT_OBJID;
int j;
for (j = 0 ; j < obj->ioo_bufcnt ; j++, nb++, r++) {
- unsigned long address;
-
- address = get_zeroed_page(GFP_KERNEL);
- if (!address) {
- CERROR("can't get new page %d/%d for id %Ld\n",
- j, obj->ioo_bufcnt,
- (unsigned long long)obj->ioo_id);
- GOTO(preprw_cleanup, rc = -ENOMEM);
+
+ if (ispersistent &&
+ (nb->offset >> PAGE_SHIFT) < ECHO_PERSISTENT_PAGES) {
+ r->page = echo_persistent_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);
+ }
}
- echo_pages++;
+
+ tot_bytes += nb->len;
+
+ atomic_inc(&obd->u.echo.eo_prep);
r->offset = nb->offset;
- r->page = virt_to_page(address);
- r->addr = kmap(r->page);
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 (!ispersistent)
+ echo_page_debug_setup(r->page, cmd, obj->ioo_id,
+ r->offset, r->len);
}
}
- CDEBUG(D_PAGE, "%ld pages allocated after prep\n", echo_pages);
+ 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);
CERROR("cleaning up %ld pages (%d obdos)\n", (long)(r - res), objcount);
while (r-- > res) {
kunmap(r->page);
+ /* NB if this is a persistent page, __free_pages will just
+ * lose the extra ref gained above */
__free_pages(r->page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
memset(res, 0, sizeof(*res) * niocount);
return rc;
}
-int echo_commitrw(int cmd, struct obd_conn *conn, int objcount,
- struct obd_ioobj *obj, int niocount, struct niobuf_local *res,
- void *desc_private)
+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, int rc)
{
+ struct obd_device *obd;
struct niobuf_local *r = res;
- int rc = 0;
- int i;
+ int i, vrc = 0;
ENTRY;
- CDEBUG(D_PAGE, "%s %d obdos with %d IOs\n",
- cmd == OBD_BRW_READ ? "reading" : "writing", objcount, niocount);
+ obd = export->exp_obd;
+ if (obd == NULL)
+ 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 && !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 != ECHO_PERSISTENT_OBJID;
int j;
for (j = 0 ; j < obj->ioo_bufcnt ; j++, r++) {
struct page *page = r->page;
- unsigned long addr;
+ void *addr;
- if (!page ||
- !(addr = (unsigned long)page_address(page)) ||
- !kern_addr_valid(addr)) {
-
- CERROR("bad page %p, id %Ld (%d), buf %d/%d\n",
- page, (unsigned long long)obj->ioo_id, i,
- j, obj->ioo_bufcnt);
+ 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 = echo_page_debug_check(page, obj->ioo_id,
+ r->offset, r->len);
+ /* check all the pages always */
+ if (vrc != 0 && rc == 0)
+ rc = vrc;
+ }
+
kunmap(page);
+ /* NB see comment above regarding persistent pages */
__free_pages(page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
}
- CDEBUG(D_PAGE, "%ld pages remain after commit\n", echo_pages);
- RETURN(0);
+ 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",
while (++r < res + niocount) {
struct page *page = r->page;
- kunmap(page);
+ /* NB see comment above regarding persistent pages */
__free_pages(page, 0);
- echo_pages--;
+ atomic_dec(&obd->u.echo.eo_prep);
}
return rc;
}
-struct obd_ops echo_obd_ops = {
- o_connect: echo_connect,
- o_disconnect: echo_disconnect,
- o_getattr: echo_getattr,
- o_preprw: echo_preprw,
- o_commitrw: echo_commitrw,
+static int echo_setup(struct obd_device *obddev, obd_count len, void *buf)
+{
+ 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);
+ }
+
+ ptlrpc_init_client (LDLM_CB_REQUEST_PORTAL, LDLM_CB_REPLY_PORTAL,
+ "echo_ldlm_cb_client", &obddev->obd_ldlm_client);
+ RETURN(0);
+}
+
+static int echo_cleanup(struct obd_device *obddev, int flags)
+{
+ int leaked;
+ ENTRY;
+
+ ldlm_namespace_free(obddev->obd_namespace, flags & OBD_OPT_FORCE);
+
+ leaked = atomic_read(&obddev->u.echo.eo_prep);
+ if (leaked != 0)
+ CERROR("%d prep/commitrw pages leaked\n", leaked);
+
+ RETURN(0);
+}
+
+int echo_attach(struct obd_device *obd, obd_count len, void *data)
+{
+ 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;
+}
+
+int echo_detach(struct obd_device *dev)
+{
+ lprocfs_free_obd_stats(dev);
+ 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_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
};
+extern int echo_client_init(void);
+extern void echo_client_exit(void);
+
+static void
+echo_persistent_pages_fini (void)
+{
+ int i;
+
+ for (i = 0; i < ECHO_PERSISTENT_PAGES; i++)
+ if (echo_persistent_pages[i] != NULL) {
+ __free_pages (echo_persistent_pages[i], 0);
+ echo_persistent_pages[i] = NULL;
+ }
+}
+
+static int
+echo_persistent_pages_init (void)
+{
+ struct page *pg;
+ int i;
+
+ for (i = 0; i < ECHO_PERSISTENT_PAGES; i++) {
+ int gfp_mask = (i < ECHO_PERSISTENT_PAGES/2) ?
+ GFP_KERNEL : GFP_HIGHUSER;
+
+ pg = alloc_pages (gfp_mask, 0);
+ if (pg == NULL) {
+ echo_persistent_pages_fini ();
+ return (-ENOMEM);
+ }
+
+ memset (kmap (pg), 0, PAGE_SIZE);
+ kunmap (pg);
+
+ echo_persistent_pages[i] = pg;
+ }
+
+ return (0);
+}
static int __init obdecho_init(void)
{
- printk(KERN_INFO "Echo OBD driver v0.001, braam@clusterfs.com\n");
+ struct lprocfs_static_vars lvars;
+ int rc;
+
+ printk(KERN_INFO "Lustre: Echo OBD driver; info@clusterfs.com\n");
+
+ LASSERT(PAGE_SIZE % OBD_ECHO_BLOCK_SIZE == 0);
+
+ lprocfs_init_vars(echo, &lvars);
+
+ rc = echo_persistent_pages_init ();
+ if (rc != 0)
+ goto failed_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);
- return obd_register_type(&echo_obd_ops, OBD_ECHO_DEVICENAME);
+ class_unregister_type(OBD_ECHO_DEVICENAME);
+ failed_1:
+ echo_persistent_pages_fini ();
+ failed_0:
+ RETURN(rc);
}
-static void __exit obdecho_exit(void)
+static void /*__exit*/ obdecho_exit(void)
{
- CERROR("%ld prep/commitrw pages leaked\n", echo_pages);
- obd_unregister_type(OBD_ECHO_DEVICENAME);
+ echo_client_exit();
+ class_unregister_type(OBD_ECHO_DEVICENAME);
+ echo_persistent_pages_fini ();
}
-MODULE_AUTHOR("Cluster Filesystems Inc. <info@clusterfs.com>");
-MODULE_DESCRIPTION("Lustre Testing Echo OBD driver v1.0");
-MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
+MODULE_DESCRIPTION("Lustre Testing Echo OBD driver");
+MODULE_LICENSE("GPL");
module_init(obdecho_init);
module_exit(obdecho_exit);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff