1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
|
/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
* Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*/
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/delay.h>
#include <linux/gfs2_ondisk.h>
#include "gfs2.h"
#include "lm_interface.h"
#include "incore.h"
#include "glock.h"
#include "lm.h"
#include "super.h"
#include "util.h"
/**
* gfs2_lm_mount - mount a locking protocol
* @sdp: the filesystem
* @args: mount arguements
* @silent: if 1, don't complain if the FS isn't a GFS2 fs
*
* Returns: errno
*/
int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent)
{
char *proto = sdp->sd_proto_name;
char *table = sdp->sd_table_name;
int flags = 0;
int error;
if (sdp->sd_args.ar_spectator)
flags |= LM_MFLAG_SPECTATOR;
fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table);
error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata,
gfs2_glock_cb, sdp,
GFS2_MIN_LVB_SIZE, flags,
&sdp->sd_lockstruct, &sdp->sd_kobj);
if (error) {
fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n",
proto, table, sdp->sd_args.ar_hostdata);
goto out;
}
if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lockspace) ||
gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) ||
gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >=
GFS2_MIN_LVB_SIZE)) {
gfs2_unmount_lockproto(&sdp->sd_lockstruct);
goto out;
}
if (sdp->sd_args.ar_spectator)
snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table);
else
snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table,
sdp->sd_lockstruct.ls_jid);
fs_info(sdp, "Joined cluster. Now mounting FS...\n");
if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) &&
!sdp->sd_args.ar_ignore_local_fs) {
sdp->sd_args.ar_localflocks = 1;
sdp->sd_args.ar_localcaching = 1;
}
out:
return error;
}
void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_others_may_mount(
sdp->sd_lockstruct.ls_lockspace);
}
void gfs2_lm_unmount(struct gfs2_sbd *sdp)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
gfs2_unmount_lockproto(&sdp->sd_lockstruct);
}
int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...)
{
va_list args;
if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
return 0;
va_start(args, fmt);
vprintk(fmt, args);
va_end(args);
fs_err(sdp, "about to withdraw from the cluster\n");
BUG_ON(sdp->sd_args.ar_debug);
fs_err(sdp, "waiting for outstanding I/O\n");
/* FIXME: suspend dm device so oustanding bio's complete
and all further io requests fail */
fs_err(sdp, "telling LM to withdraw\n");
gfs2_withdraw_lockproto(&sdp->sd_lockstruct);
fs_err(sdp, "withdrawn\n");
dump_stack();
return -1;
}
int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name,
void **lockp)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_get_lock(
sdp->sd_lockstruct.ls_lockspace, name, lockp);
return error;
}
void gfs2_lm_put_lock(struct gfs2_sbd *sdp, void *lock)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_put_lock(lock);
}
unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, void *lock,
unsigned int cur_state, unsigned int req_state,
unsigned int flags)
{
int ret = 0;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock, cur_state,
req_state, flags);
return ret;
}
unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, void *lock,
unsigned int cur_state)
{
int ret = 0;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
ret = sdp->sd_lockstruct.ls_ops->lm_unlock(lock, cur_state);
return ret;
}
void gfs2_lm_cancel(struct gfs2_sbd *sdp, void *lock)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_cancel(lock);
}
int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, void *lock, char **lvbp)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_hold_lvb(lock, lvbp);
return error;
}
void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, void *lock, char *lvb)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(lock, lvb);
}
int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_plock_get(
sdp->sd_lockstruct.ls_lockspace, name, file, fl);
return error;
}
int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, int cmd, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_plock(
sdp->sd_lockstruct.ls_lockspace, name, file, cmd, fl);
return error;
}
int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name,
struct file *file, struct file_lock *fl)
{
int error = -EIO;
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
error = sdp->sd_lockstruct.ls_ops->lm_punlock(
sdp->sd_lockstruct.ls_lockspace, name, file, fl);
return error;
}
void gfs2_lm_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
unsigned int message)
{
if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
sdp->sd_lockstruct.ls_ops->lm_recovery_done(
sdp->sd_lockstruct.ls_lockspace, jid, message);
}
|
