1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001-2003 Cluster File Systems, Inc.
5 * Author Peter Braam <braam@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or
10 * modify it under the terms of version 2 of the GNU General Public
11 * License as published by the Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with Lustre; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * For testing and management it is treated as an obd_device,
23 * although * it does not export a full OBD method table (the
24 * requests are coming * in over the wire, so object target modules
25 * do not have a full * method table.)
30 # define EXPORT_SYMTAB
32 #define DEBUG_SUBSYSTEM S_OSC
35 # include <linux/version.h>
36 # include <linux/module.h>
37 # include <linux/mm.h>
38 # include <linux/highmem.h>
39 # include <linux/ctype.h>
40 # include <linux/init.h>
41 # if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
42 # include <linux/workqueue.h>
43 # include <linux/smp_lock.h>
45 # include <linux/locks.h>
47 #else /* __KERNEL__ */
48 # include <liblustre.h>
55 # include <linux/lustre_dlm.h>
56 #include <linux/obd_class.h>
57 #include "osc_internal.h"
59 int oscc_recovering(struct osc_creator *oscc)
63 spin_lock(&oscc->oscc_lock);
64 recov = oscc->oscc_flags & OSCC_FLAG_RECOVERING;
65 spin_unlock(&oscc->oscc_lock);
70 /* this only is used now for deleting orphanes */
71 int osc_create(struct obd_export *exp, struct obdo *oa,
72 void *acl, int acl_size, struct lov_stripe_md **ea,
73 struct obd_trans_info *oti)
75 struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
76 int rc = 0, try_again = 1;
81 LASSERT(oa->o_gr > 0);
82 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
83 LASSERT(acl == NULL && acl_size == 0);
85 if (oa->o_gr == FILTER_GROUP_LLOG || oa->o_gr == FILTER_GROUP_ECHO)
86 RETURN(osc_real_create(exp, oa, ea, oti));
88 /* this is the special case where create removes orphans */
89 if ((oa->o_valid & OBD_MD_FLFLAGS) &&
90 oa->o_flags == OBD_FL_DELORPHAN) {
91 spin_lock(&oscc->oscc_lock);
92 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
93 spin_unlock(&oscc->oscc_lock);
96 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
97 spin_unlock(&oscc->oscc_lock);
100 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
101 spin_unlock(&oscc->oscc_lock);
102 CDEBUG(D_HA, "%s; oscc recovery started\n",
103 exp->exp_obd->obd_name);
104 LASSERT(oscc->oscc_flags & OSCC_FLAG_RECOVERING);
106 CDEBUG(D_HA, "%s: deleting to next_id: "LPU64"\n",
107 oscc->oscc_obd->obd_name, oa->o_id);
109 rc = osc_real_create(exp, oa, ea, NULL);
110 if (oscc->oscc_obd == NULL) {
111 CWARN("the obd for oscc %p has been freed\n", oscc);
115 spin_lock(&oscc->oscc_lock);
116 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
117 if (rc == 0 || rc == -ENOSPC) {
119 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
120 oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
121 CDEBUG(D_HA, "%s: oscc recovery finished: %d\n",
122 oscc->oscc_obd->obd_name, rc);
123 wake_up(&oscc->oscc_waitq);
125 CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
126 oscc->oscc_obd->obd_name, rc);
128 spin_unlock(&oscc->oscc_lock);
133 /* If orphans are being recovered, then we must wait until
134 it is finished before we can continue with create. */
135 if (oscc_recovering(oscc)) {
136 struct l_wait_info lwi;
138 CDEBUG(D_HA,"%p: oscc recovery in progress, waiting\n",
141 lwi = LWI_TIMEOUT(MAX(obd_timeout*HZ/4, 1), NULL, NULL);
142 rc = l_wait_event(oscc->oscc_waitq,
143 !oscc_recovering(oscc), &lwi);
144 LASSERT(rc == 0 || rc == -ETIMEDOUT);
145 if (rc == -ETIMEDOUT) {
146 CDEBUG(D_ERROR,"%p: timeout waiting on recovery\n",
148 portals_debug_dumplog();
151 CDEBUG(D_HA, "%p: oscc recovery over, waking up\n",
155 spin_lock(&oscc->oscc_lock);
156 if (oscc->oscc_flags & OSCC_FLAG_EXITING) {
157 spin_unlock(&oscc->oscc_lock);
161 if (oscc->oscc_flags & OSCC_FLAG_NOSPC) {
163 spin_unlock(&oscc->oscc_lock);
167 oscc->oscc_next_id++;
168 oa->o_id = oscc->oscc_next_id;
170 spin_unlock(&oscc->oscc_lock);
172 CDEBUG(D_HA, "%s: returning objid "LPU64"\n",
173 oscc->oscc_obd->u.cli.cl_import->imp_target_uuid.uuid,
180 void oscc_init(struct obd_device *obd)
182 struct osc_creator *oscc;
187 oscc = &obd->u.cli.cl_oscc;
188 memset(oscc, 0, sizeof(*oscc));
190 oscc->oscc_obd = obd;
191 spin_lock_init(&oscc->oscc_lock);
192 oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
193 init_waitqueue_head(&oscc->oscc_waitq);