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Robert Read authoredDon't reset oscc_gr after recovery.
Robert Read authoredDon't reset oscc_gr after recovery.
osc_create.c 12.07 KiB
/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
* Copyright (C) 2001-2003 Cluster File Systems, Inc.
* Author Peter Braam <braam@clusterfs.com>
*
* This file is part of Lustre, http://www.lustre.org.
*
* 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.
*
* 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.
*
* For testing and management it is treated as an obd_device,
* although * it does not export a full OBD method table (the
* requests are coming * in over the wire, so object target modules
* do not have a full * method table.)
*
*/
#ifndef EXPORT_SYMTAB
# define EXPORT_SYMTAB
#endif
#define DEBUG_SUBSYSTEM S_OSC
#ifdef __KERNEL__
# include <linux/version.h>
# include <linux/module.h>
# include <linux/mm.h>
# include <linux/highmem.h>
# include <linux/ctype.h>
# include <linux/init.h>
# if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
# include <linux/workqueue.h>
# include <linux/smp_lock.h>
# else
# include <linux/locks.h>
# endif
#else /* __KERNEL__ */
# include <liblustre.h>
#endif
#ifdef __CYGWIN__
# include <ctype.h>
#endif
# include <linux/lustre_dlm.h>
#include <linux/obd_class.h>
#include "osc_internal.h"
static int osc_interpret_create(struct ptlrpc_request *req, void *data,
int rc)
{
struct osc_creator *oscc;
struct ost_body *body = NULL;
ENTRY;
if (req->rq_repmsg) {
body = lustre_swab_repbuf(req, 0, sizeof(*body),
lustre_swab_ost_body);
if (body == NULL && rc == 0)
rc = -EPROTO; }
oscc = req->rq_async_args.pointer_arg[0];
spin_lock(&oscc->oscc_lock);
if (body)
oscc->oscc_last_id = body->oa.o_id;
if (rc == -ENOSPC) {
DEBUG_REQ(D_INODE, req, "OST out of space, flagging");
oscc->oscc_flags |= OSCC_FLAG_NOSPC;
} else if (rc != 0 && rc != -EIO) {
DEBUG_REQ(D_ERROR, req,
"unknown rc %d from async create: failing oscc",
rc);
oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
ptlrpc_fail_import(req->rq_import, req->rq_import_generation);
}
oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
spin_unlock(&oscc->oscc_lock);
CDEBUG(D_HA, "preallocated through id "LPU64" (last used "LPU64")\n",
oscc->oscc_last_id, oscc->oscc_next_id);
wake_up(&oscc->oscc_waitq);
RETURN(rc);
}
static int oscc_internal_create(struct osc_creator *oscc)
{
struct ptlrpc_request *request;
struct ost_body *body;
int size = sizeof(*body);
ENTRY;
spin_lock(&oscc->oscc_lock);
if (oscc->oscc_flags & OSCC_FLAG_CREATING ||
oscc->oscc_flags & OSCC_FLAG_RECOVERING) {
spin_unlock(&oscc->oscc_lock);
RETURN(0);
}
oscc->oscc_flags |= OSCC_FLAG_CREATING;
spin_unlock(&oscc->oscc_lock);
request = ptlrpc_prep_req(oscc->oscc_obd->u.cli.cl_import, OST_CREATE,
1, &size, NULL);
if (request == NULL) {
spin_lock(&oscc->oscc_lock);
oscc->oscc_flags &= ~OSCC_FLAG_CREATING;
spin_unlock(&oscc->oscc_lock);
RETURN(-ENOMEM);
}
request->rq_request_portal = OST_CREATE_PORTAL; //XXX FIXME bug 249
body = lustre_msg_buf(request->rq_reqmsg, 0, sizeof(*body));
spin_lock(&oscc->oscc_lock);
body->oa.o_id = oscc->oscc_last_id + oscc->oscc_grow_count;
body->oa.o_gr = oscc->oscc_gr;
LASSERT(body->oa.o_gr > 0);
body->oa.o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
CDEBUG(D_INFO, "preallocating through id "LPU64" (last used "LPU64")\n",
body->oa.o_id, oscc->oscc_next_id);
spin_unlock(&oscc->oscc_lock);
request->rq_replen = lustre_msg_size(1, &size);
request->rq_async_args.pointer_arg[0] = oscc;
request->rq_interpret_reply = osc_interpret_create;
ptlrpcd_add_req(request);
RETURN(0);}
static int oscc_has_objects(struct osc_creator *oscc, int count)
{
int have_objs;
spin_lock(&oscc->oscc_lock);
have_objs = ((__s64)(oscc->oscc_last_id - oscc->oscc_next_id) >= count);
spin_unlock(&oscc->oscc_lock);
if (!have_objs)
oscc_internal_create(oscc);
return have_objs;
}
static int oscc_wait_for_objects(struct osc_creator *oscc, int count)
{
int have_objs;
int ost_full;
int osc_invalid;
have_objs = oscc_has_objects(oscc, count);
spin_lock(&oscc->oscc_lock);
ost_full = (oscc->oscc_flags & OSCC_FLAG_NOSPC);
spin_unlock(&oscc->oscc_lock);
osc_invalid = oscc->oscc_obd->u.cli.cl_import->imp_invalid;
return have_objs || ost_full || osc_invalid;
}
static int oscc_precreate(struct osc_creator *oscc, int wait)
{
struct l_wait_info lwi = { 0 };
int rc = 0;
ENTRY;
if (oscc_has_objects(oscc, oscc->oscc_kick_barrier))
RETURN(0);
if (!wait)
RETURN(0);
/* no rc check -- a no-INTR, no-TIMEOUT wait can't fail */
l_wait_event(oscc->oscc_waitq, oscc_wait_for_objects(oscc, 1), &lwi);
if (!oscc_has_objects(oscc, 1) && (oscc->oscc_flags & OSCC_FLAG_NOSPC))
rc = -ENOSPC;
if (oscc->oscc_obd->u.cli.cl_import->imp_invalid)
rc = -EIO;
RETURN(rc);
}
int oscc_recovering(struct osc_creator *oscc)
{
int recov = 0;
spin_lock(&oscc->oscc_lock);
recov = oscc->oscc_flags & OSCC_FLAG_RECOVERING;
spin_unlock(&oscc->oscc_lock);
return recov;
}
int osc_create(struct obd_export *exp, struct obdo *oa,
struct lov_stripe_md **ea, struct obd_trans_info *oti)
{ struct lov_stripe_md *lsm;
struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
int try_again = 1, rc = 0;
ENTRY;
LASSERT(oa);
LASSERT(ea);
LASSERT(oa->o_valid & OBD_MD_FLGROUP);
LASSERT(oa->o_gr > 0);
if ((oa->o_valid & OBD_MD_FLFLAGS) &&
oa->o_flags == OBD_FL_RECREATE_OBJS) {
/* Exceptional case where we are trying to repair missing
* objects for various groups. We have already validated that
* this is a valid group for the file. Don't set oscc->oscc_gr.
*/
RETURN(osc_real_create(exp, oa, ea, oti));
}
LASSERT(oscc->oscc_gr == 0 || oscc->oscc_gr == oa->o_gr);
oscc->oscc_gr = oa->o_gr;
if (oa->o_gr == FILTER_GROUP_LLOG || oa->o_gr == FILTER_GROUP_ECHO)
RETURN(osc_real_create(exp, oa, ea, oti));
lsm = *ea;
if (lsm == NULL) {
rc = obd_alloc_memmd(exp, &lsm);
if (rc < 0)
RETURN(rc);
}
/* this is the special case where create removes orphans */
if ((oa->o_valid & OBD_MD_FLFLAGS) &&
oa->o_flags == OBD_FL_DELORPHAN) {
CDEBUG(D_HA, "%s; oscc recovery started\n",
exp->exp_obd->obd_name);
LASSERT(oscc->oscc_flags & OSCC_FLAG_RECOVERING);
/* delete from next_id on up */
oa->o_valid |= OBD_MD_FLID;
oa->o_id = oscc->oscc_next_id - 1;
CDEBUG(D_HA, "%s: deleting to next_id: "LPU64"\n",
exp->exp_obd->obd_name, oa->o_id);
rc = osc_real_create(exp, oa, ea, NULL);
if (oscc->oscc_obd == NULL) {
CWARN("the obd for oscc %p has been freed\n", oscc);
RETURN(rc);
}
spin_lock(&oscc->oscc_lock);
if (rc == 0 || rc == -ENOSPC) {
if (rc == -ENOSPC)
oscc->oscc_flags |= OSCC_FLAG_NOSPC;
oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
oscc->oscc_last_id = oa->o_id;
CDEBUG(D_HA, "%s: oscc recovery finished: %d\n",
exp->exp_obd->obd_name, rc);
wake_up(&oscc->oscc_waitq);
} else {
CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
exp->exp_obd->obd_name, rc);
}
spin_unlock(&oscc->oscc_lock);
RETURN(rc);
}
while (try_again) {
/* If orphans are being recovered, then we must wait until
it is finished before we can continue with create. */
if (oscc_recovering(oscc)) {
struct l_wait_info lwi;
CDEBUG(D_HA,"%s: oscc sync in progress, waiting\n",
exp->exp_obd->obd_name);
lwi = LWI_TIMEOUT(MAX(obd_timeout * HZ, 1), NULL, NULL);
rc = l_wait_event(oscc->oscc_waitq,
!oscc_recovering(oscc), &lwi);
LASSERT(rc == 0 || rc == -ETIMEDOUT);
if (rc == -ETIMEDOUT) {
CDEBUG(D_HA, "%s: timed out waiting for sync\n",
exp->exp_obd->obd_name);
RETURN(rc);
}
CDEBUG(D_HA, "%s: oscc sync over, waking up\n",
exp->exp_obd->obd_name);
}
spin_lock(&oscc->oscc_lock);
if (oscc->oscc_last_id >= oscc->oscc_next_id) {
memcpy(oa, &oscc->oscc_oa, sizeof(*oa));
oa->o_id = oscc->oscc_next_id;
oa->o_gr = oscc->oscc_gr;
lsm->lsm_object_id = oscc->oscc_next_id;
lsm->lsm_object_gr = oscc->oscc_gr;
*ea = lsm;
oscc->oscc_next_id++;
try_again = 0;
} else if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
rc = -ENOSPC;
spin_unlock(&oscc->oscc_lock);
break;
}
spin_unlock(&oscc->oscc_lock);
rc = oscc_precreate(oscc, try_again);
if (rc == -EIO)
break;
}
if (rc == 0)
CDEBUG(D_INFO, "returning objid "LPU64"/"LPU64"\n",
lsm->lsm_object_id, lsm->lsm_object_gr);
else if (*ea == NULL)
obd_free_memmd(exp, &lsm);
RETURN(rc);
}
void oscc_init(struct obd_device *obd)
{
struct osc_creator *oscc;
if (obd == NULL)
return;
oscc = &obd->u.cli.cl_oscc;
memset(oscc, 0, sizeof(*oscc));
INIT_LIST_HEAD(&oscc->oscc_list);
init_waitqueue_head(&oscc->oscc_waitq);
spin_lock_init(&oscc->oscc_lock);
oscc->oscc_obd = obd;
oscc->oscc_kick_barrier = 100;
oscc->oscc_grow_count = 2000;
oscc->oscc_initial_create_count = 2000;
oscc->oscc_next_id = 2;
oscc->oscc_last_id = 1;
oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
/* XXX the export handle should give the oscc the last object */
/* oed->oed_oscc.oscc_last_id = exph->....; */
}