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- define NOHIGHMEM for recently added highmem-split patch
[fs/lustre-release.git] / lustre / osc / osc_create.c
1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2  * vim:expandtab:shiftwidth=8:tabstop=8:
3  *
4  *  Copyright (C) 2001-2003 Cluster File Systems, Inc.
5  *   Author Peter Braam <braam@clusterfs.com>
6  *
7  *   This file is part of Lustre, http://www.lustre.org.
8  *
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.
12  *
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.
17  *
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.
21  *
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.)
26  *
27  */
28
29 #ifndef EXPORT_SYMTAB
30 # define EXPORT_SYMTAB
31 #endif
32 #define DEBUG_SUBSYSTEM S_OSC
33
34 #ifdef __KERNEL__
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>
44 # else
45 #  include <linux/locks.h>
46 # endif
47 #else /* __KERNEL__ */
48 # include <liblustre.h>
49 #endif
50
51 #ifdef  __CYGWIN__
52 # include <ctype.h>
53 #endif
54
55 # include <linux/lustre_dlm.h>
56 #include <linux/obd_class.h>
57 #include "osc_internal.h"
58
59 /* this only is used now for deleting orphanes */
60 int osc_create(struct obd_export *exp, struct obdo *oa,
61                void *acl, int acl_size, struct lov_stripe_md **ea,
62                struct obd_trans_info *oti)
63 {
64         struct osc_creator *oscc = &exp->exp_obd->u.cli.cl_oscc;
65         int rc = 0;
66         ENTRY;
67
68         LASSERT(oa);
69         LASSERT(ea);
70         LASSERT(oa->o_gr > 0);
71         LASSERT(oa->o_valid & OBD_MD_FLGROUP);
72         LASSERT(acl == NULL && acl_size == 0);
73
74         if (oa->o_gr == FILTER_GROUP_LLOG || oa->o_gr == FILTER_GROUP_ECHO)
75                 RETURN(osc_real_create(exp, oa, ea, oti));
76
77         /* this is the special case where create removes orphans */
78         if ((oa->o_valid & OBD_MD_FLFLAGS) &&
79             oa->o_flags == OBD_FL_DELORPHAN) {
80                 spin_lock(&oscc->oscc_lock);
81                 if (oscc->oscc_flags & OSCC_FLAG_SYNC_IN_PROGRESS) {
82                         spin_unlock(&oscc->oscc_lock);
83                         return -EBUSY;
84                 }
85                 if (!(oscc->oscc_flags & OSCC_FLAG_RECOVERING)) {
86                         spin_unlock(&oscc->oscc_lock);
87                         return 0;
88                 }
89                 oscc->oscc_flags |= OSCC_FLAG_SYNC_IN_PROGRESS;
90                 spin_unlock(&oscc->oscc_lock);
91                 CDEBUG(D_HA, "%s; oscc recovery started\n",
92                        exp->exp_obd->obd_name);
93                 LASSERT(oscc->oscc_flags & OSCC_FLAG_RECOVERING);
94
95                 CDEBUG(D_HA, "%s: deleting to next_id: "LPU64"\n",
96                        oscc->oscc_obd->obd_name, oa->o_id);
97
98                 rc = osc_real_create(exp, oa, ea, NULL);
99                 if (oscc->oscc_obd == NULL) {
100                         CWARN("the obd for oscc %p has been freed\n", oscc);
101                         RETURN(rc);
102                 }
103
104                 spin_lock(&oscc->oscc_lock);
105                 oscc->oscc_flags &= ~OSCC_FLAG_SYNC_IN_PROGRESS;
106                 if (rc == 0 || rc == -ENOSPC) {
107                         if (rc == -ENOSPC)
108                                 oscc->oscc_flags |= OSCC_FLAG_NOSPC;
109                         oscc->oscc_flags &= ~OSCC_FLAG_RECOVERING;
110                         CDEBUG(D_HA, "%s: oscc recovery finished: %d\n",
111                                oscc->oscc_obd->obd_name, rc);
112                 } else {
113                         CDEBUG(D_ERROR, "%s: oscc recovery failed: %d\n",
114                                oscc->oscc_obd->obd_name, rc);
115                 }
116                 spin_unlock(&oscc->oscc_lock);
117                 RETURN(rc);
118         }
119
120         LBUG();
121         RETURN(0);
122 }
123
124 void oscc_init(struct obd_device *obd)
125 {
126         struct osc_creator *oscc;
127
128         if (obd == NULL)
129                 return;
130
131         oscc = &obd->u.cli.cl_oscc;
132         memset(oscc, 0, sizeof(*oscc));
133
134         oscc->oscc_obd = obd;
135         spin_lock_init(&oscc->oscc_lock);
136         oscc->oscc_flags |= OSCC_FLAG_RECOVERING;
137 }