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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
7 | * of the GNU General Public License v.2. | |
8 | */ | |
9 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
15 | #include <linux/delay.h> | |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
b3b94faa DT |
17 | #include <asm/semaphore.h> |
18 | ||
19 | #include "gfs2.h" | |
5c676f6d SW |
20 | #include "lm_interface.h" |
21 | #include "incore.h" | |
b3b94faa DT |
22 | #include "glock.h" |
23 | #include "lm.h" | |
24 | #include "super.h" | |
5c676f6d SW |
25 | #include "util.h" |
26 | #include "lvb.h" | |
b3b94faa DT |
27 | |
28 | /** | |
29 | * gfs2_lm_mount - mount a locking protocol | |
30 | * @sdp: the filesystem | |
31 | * @args: mount arguements | |
32 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs | |
33 | * | |
34 | * Returns: errno | |
35 | */ | |
36 | ||
37 | int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
38 | { | |
39 | char *proto = sdp->sd_proto_name; | |
40 | char *table = sdp->sd_table_name; | |
41 | int flags = 0; | |
42 | int error; | |
43 | ||
44 | if (sdp->sd_args.ar_spectator) | |
45 | flags |= LM_MFLAG_SPECTATOR; | |
46 | ||
47 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
48 | ||
49 | error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata, | |
50 | gfs2_glock_cb, sdp, | |
51 | GFS2_MIN_LVB_SIZE, flags, | |
52 | &sdp->sd_lockstruct, &sdp->sd_kobj); | |
53 | if (error) { | |
54 | fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n", | |
55 | proto, table, sdp->sd_args.ar_hostdata); | |
56 | goto out; | |
57 | } | |
58 | ||
59 | if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lockspace) || | |
60 | gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) || | |
61 | gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >= | |
62 | GFS2_MIN_LVB_SIZE)) { | |
63 | gfs2_unmount_lockproto(&sdp->sd_lockstruct); | |
64 | goto out; | |
65 | } | |
66 | ||
67 | if (sdp->sd_args.ar_spectator) | |
68 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table); | |
69 | else | |
70 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table, | |
71 | sdp->sd_lockstruct.ls_jid); | |
72 | ||
73 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
74 | ||
75 | if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) && | |
76 | !sdp->sd_args.ar_ignore_local_fs) { | |
77 | sdp->sd_args.ar_localflocks = 1; | |
78 | sdp->sd_args.ar_localcaching = 1; | |
79 | } | |
80 | ||
81 | out: | |
82 | return error; | |
83 | } | |
84 | ||
85 | void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp) | |
86 | { | |
87 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
568f4c96 SW |
88 | sdp->sd_lockstruct.ls_ops->lm_others_may_mount( |
89 | sdp->sd_lockstruct.ls_lockspace); | |
b3b94faa DT |
90 | } |
91 | ||
92 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
93 | { | |
94 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
95 | gfs2_unmount_lockproto(&sdp->sd_lockstruct); | |
96 | } | |
97 | ||
98 | int gfs2_lm_withdraw(struct gfs2_sbd *sdp, char *fmt, ...) | |
99 | { | |
100 | va_list args; | |
101 | ||
102 | if (test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags)) | |
103 | return 0; | |
104 | ||
105 | va_start(args, fmt); | |
106 | vprintk(fmt, args); | |
107 | va_end(args); | |
108 | ||
109 | fs_err(sdp, "about to withdraw from the cluster\n"); | |
3a8fe9be SW |
110 | BUG_ON(sdp->sd_args.ar_debug); |
111 | ||
b3b94faa DT |
112 | |
113 | fs_err(sdp, "waiting for outstanding I/O\n"); | |
114 | ||
115 | /* FIXME: suspend dm device so oustanding bio's complete | |
116 | and all further io requests fail */ | |
117 | ||
118 | fs_err(sdp, "telling LM to withdraw\n"); | |
119 | gfs2_withdraw_lockproto(&sdp->sd_lockstruct); | |
120 | fs_err(sdp, "withdrawn\n"); | |
121 | dump_stack(); | |
122 | ||
123 | return -1; | |
124 | } | |
125 | ||
126 | int gfs2_lm_get_lock(struct gfs2_sbd *sdp, struct lm_lockname *name, | |
127 | lm_lock_t **lockp) | |
128 | { | |
129 | int error; | |
130 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
131 | error = -EIO; | |
132 | else | |
568f4c96 SW |
133 | error = sdp->sd_lockstruct.ls_ops->lm_get_lock( |
134 | sdp->sd_lockstruct.ls_lockspace, name, lockp); | |
b3b94faa DT |
135 | return error; |
136 | } | |
137 | ||
138 | void gfs2_lm_put_lock(struct gfs2_sbd *sdp, lm_lock_t *lock) | |
139 | { | |
140 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
141 | sdp->sd_lockstruct.ls_ops->lm_put_lock(lock); | |
142 | } | |
143 | ||
144 | unsigned int gfs2_lm_lock(struct gfs2_sbd *sdp, lm_lock_t *lock, | |
145 | unsigned int cur_state, unsigned int req_state, | |
146 | unsigned int flags) | |
147 | { | |
148 | int ret; | |
149 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
150 | ret = 0; | |
151 | else | |
152 | ret = sdp->sd_lockstruct.ls_ops->lm_lock(lock, | |
153 | cur_state, | |
154 | req_state, flags); | |
155 | return ret; | |
156 | } | |
157 | ||
158 | unsigned int gfs2_lm_unlock(struct gfs2_sbd *sdp, lm_lock_t *lock, | |
159 | unsigned int cur_state) | |
160 | { | |
161 | int ret; | |
162 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
163 | ret = 0; | |
164 | else | |
165 | ret = sdp->sd_lockstruct.ls_ops->lm_unlock(lock, cur_state); | |
166 | return ret; | |
167 | } | |
168 | ||
169 | void gfs2_lm_cancel(struct gfs2_sbd *sdp, lm_lock_t *lock) | |
170 | { | |
171 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
172 | sdp->sd_lockstruct.ls_ops->lm_cancel(lock); | |
173 | } | |
174 | ||
175 | int gfs2_lm_hold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char **lvbp) | |
176 | { | |
177 | int error; | |
178 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
179 | error = -EIO; | |
180 | else | |
181 | error = sdp->sd_lockstruct.ls_ops->lm_hold_lvb(lock, lvbp); | |
182 | return error; | |
183 | } | |
184 | ||
185 | void gfs2_lm_unhold_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb) | |
186 | { | |
187 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
188 | sdp->sd_lockstruct.ls_ops->lm_unhold_lvb(lock, lvb); | |
189 | } | |
190 | ||
08bc2dbc | 191 | #if 0 |
b3b94faa DT |
192 | void gfs2_lm_sync_lvb(struct gfs2_sbd *sdp, lm_lock_t *lock, char *lvb) |
193 | { | |
194 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
195 | sdp->sd_lockstruct.ls_ops->lm_sync_lvb(lock, lvb); | |
196 | } | |
08bc2dbc | 197 | #endif /* 0 */ |
b3b94faa DT |
198 | |
199 | int gfs2_lm_plock_get(struct gfs2_sbd *sdp, struct lm_lockname *name, | |
200 | struct file *file, struct file_lock *fl) | |
201 | { | |
202 | int error; | |
203 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
204 | error = -EIO; | |
205 | else | |
206 | error = sdp->sd_lockstruct.ls_ops->lm_plock_get( | |
207 | sdp->sd_lockstruct.ls_lockspace, | |
208 | name, file, fl); | |
209 | return error; | |
210 | } | |
211 | ||
212 | int gfs2_lm_plock(struct gfs2_sbd *sdp, struct lm_lockname *name, | |
213 | struct file *file, int cmd, struct file_lock *fl) | |
214 | { | |
215 | int error; | |
216 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
217 | error = -EIO; | |
218 | else | |
219 | error = sdp->sd_lockstruct.ls_ops->lm_plock( | |
220 | sdp->sd_lockstruct.ls_lockspace, | |
221 | name, file, cmd, fl); | |
222 | return error; | |
223 | } | |
224 | ||
225 | int gfs2_lm_punlock(struct gfs2_sbd *sdp, struct lm_lockname *name, | |
226 | struct file *file, struct file_lock *fl) | |
227 | { | |
228 | int error; | |
229 | if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
230 | error = -EIO; | |
231 | else | |
232 | error = sdp->sd_lockstruct.ls_ops->lm_punlock( | |
233 | sdp->sd_lockstruct.ls_lockspace, | |
234 | name, file, fl); | |
235 | return error; | |
236 | } | |
237 | ||
238 | void gfs2_lm_recovery_done(struct gfs2_sbd *sdp, unsigned int jid, | |
239 | unsigned int message) | |
240 | { | |
241 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
568f4c96 SW |
242 | sdp->sd_lockstruct.ls_ops->lm_recovery_done( |
243 | sdp->sd_lockstruct.ls_lockspace, jid, message); | |
b3b94faa DT |
244 | } |
245 |