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