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authorDavid Teigland <teigland@redhat.com>2006-01-16 11:50:04 -0500
committerSteven Whitehouse <swhiteho@redhat.com>2006-01-16 11:50:04 -0500
commitb3b94faa5fe5968827ba0640ee9fba4b3e7f736e (patch)
tree70bd6068b050d2c46e338484f8b03fae4365c6c3 /fs/gfs2/ops_super.c
parentf7825dcf8c7301cfd3724eb40c5b443cc85ab7b8 (diff)
[GFS2] The core of GFS2
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2/ops_super.c')
-rw-r--r--fs/gfs2/ops_super.c401
1 files changed, 401 insertions, 0 deletions
diff --git a/fs/gfs2/ops_super.c b/fs/gfs2/ops_super.c
new file mode 100644
index 000000000000..ca6a4d81bc26
--- /dev/null
+++ b/fs/gfs2/ops_super.c
@@ -0,0 +1,401 @@
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/vmalloc.h>
16#include <linux/statfs.h>
17#include <linux/seq_file.h>
18#include <linux/mount.h>
19#include <linux/kthread.h>
20#include <linux/delay.h>
21#include <asm/semaphore.h>
22
23#include "gfs2.h"
24#include "glock.h"
25#include "inode.h"
26#include "lm.h"
27#include "log.h"
28#include "mount.h"
29#include "ops_super.h"
30#include "page.h"
31#include "quota.h"
32#include "recovery.h"
33#include "rgrp.h"
34#include "super.h"
35#include "sys.h"
36
37/**
38 * gfs2_write_inode - Make sure the inode is stable on the disk
39 * @inode: The inode
40 * @sync: synchronous write flag
41 *
42 * Returns: errno
43 */
44
45static int gfs2_write_inode(struct inode *inode, int sync)
46{
47 struct gfs2_inode *ip = get_v2ip(inode);
48
49 atomic_inc(&ip->i_sbd->sd_ops_super);
50
51 if (current->flags & PF_MEMALLOC)
52 return 0;
53 if (ip && sync)
54 gfs2_log_flush_glock(ip->i_gl);
55
56 return 0;
57}
58
59/**
60 * gfs2_put_super - Unmount the filesystem
61 * @sb: The VFS superblock
62 *
63 */
64
65static void gfs2_put_super(struct super_block *sb)
66{
67 struct gfs2_sbd *sdp = get_v2sdp(sb);
68 int error;
69
70 if (!sdp)
71 return;
72
73 atomic_inc(&sdp->sd_ops_super);
74
75 /* Unfreeze the filesystem, if we need to */
76
77 down(&sdp->sd_freeze_lock);
78 if (sdp->sd_freeze_count)
79 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
80 up(&sdp->sd_freeze_lock);
81
82 kthread_stop(sdp->sd_inoded_process);
83 kthread_stop(sdp->sd_quotad_process);
84 kthread_stop(sdp->sd_logd_process);
85 kthread_stop(sdp->sd_recoverd_process);
86 while (sdp->sd_glockd_num--)
87 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
88 kthread_stop(sdp->sd_scand_process);
89
90 if (!(sb->s_flags & MS_RDONLY)) {
91 error = gfs2_make_fs_ro(sdp);
92 if (error)
93 gfs2_io_error(sdp);
94 }
95
96 /* At this point, we're through modifying the disk */
97
98 /* Release stuff */
99
100 gfs2_inode_put(sdp->sd_master_dir);
101 gfs2_inode_put(sdp->sd_jindex);
102 gfs2_inode_put(sdp->sd_inum_inode);
103 gfs2_inode_put(sdp->sd_statfs_inode);
104 gfs2_inode_put(sdp->sd_rindex);
105 gfs2_inode_put(sdp->sd_quota_inode);
106 gfs2_inode_put(sdp->sd_root_dir);
107
108 gfs2_glock_put(sdp->sd_rename_gl);
109 gfs2_glock_put(sdp->sd_trans_gl);
110
111 if (!sdp->sd_args.ar_spectator) {
112 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
113 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
114 gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
115 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
116 gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
117 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
118 gfs2_inode_put(sdp->sd_ir_inode);
119 gfs2_inode_put(sdp->sd_sc_inode);
120 gfs2_inode_put(sdp->sd_ut_inode);
121 gfs2_inode_put(sdp->sd_qc_inode);
122 }
123
124 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
125
126 gfs2_clear_rgrpd(sdp);
127 gfs2_jindex_free(sdp);
128
129 /* Take apart glock structures and buffer lists */
130 gfs2_gl_hash_clear(sdp, WAIT);
131
132 /* Unmount the locking protocol */
133 gfs2_lm_unmount(sdp);
134
135 /* At this point, we're through participating in the lockspace */
136
137 gfs2_sys_fs_del(sdp);
138
139 /* Get rid of any extra inodes */
140 while (invalidate_inodes(sb))
141 yield();
142
143 vfree(sdp);
144
145 set_v2sdp(sb, NULL);
146}
147
148/**
149 * gfs2_write_super - disk commit all incore transactions
150 * @sb: the filesystem
151 *
152 * This function is called every time sync(2) is called.
153 * After this exits, all dirty buffers and synced.
154 */
155
156static void gfs2_write_super(struct super_block *sb)
157{
158 struct gfs2_sbd *sdp = get_v2sdp(sb);
159 atomic_inc(&sdp->sd_ops_super);
160 gfs2_log_flush(sdp);
161}
162
163/**
164 * gfs2_write_super_lockfs - prevent further writes to the filesystem
165 * @sb: the VFS structure for the filesystem
166 *
167 */
168
169static void gfs2_write_super_lockfs(struct super_block *sb)
170{
171 struct gfs2_sbd *sdp = get_v2sdp(sb);
172 int error;
173
174 atomic_inc(&sdp->sd_ops_super);
175
176 for (;;) {
177 error = gfs2_freeze_fs(sdp);
178 if (!error)
179 break;
180
181 switch (error) {
182 case -EBUSY:
183 fs_err(sdp, "waiting for recovery before freeze\n");
184 break;
185
186 default:
187 fs_err(sdp, "error freezing FS: %d\n", error);
188 break;
189 }
190
191 fs_err(sdp, "retrying...\n");
192 msleep(1000);
193 }
194}
195
196/**
197 * gfs2_unlockfs - reallow writes to the filesystem
198 * @sb: the VFS structure for the filesystem
199 *
200 */
201
202static void gfs2_unlockfs(struct super_block *sb)
203{
204 struct gfs2_sbd *sdp = get_v2sdp(sb);
205
206 atomic_inc(&sdp->sd_ops_super);
207 gfs2_unfreeze_fs(sdp);
208}
209
210/**
211 * gfs2_statfs - Gather and return stats about the filesystem
212 * @sb: The superblock
213 * @statfsbuf: The buffer
214 *
215 * Returns: 0 on success or error code
216 */
217
218static int gfs2_statfs(struct super_block *sb, struct kstatfs *buf)
219{
220 struct gfs2_sbd *sdp = get_v2sdp(sb);
221 struct gfs2_statfs_change sc;
222 int error;
223
224 atomic_inc(&sdp->sd_ops_super);
225
226 if (gfs2_tune_get(sdp, gt_statfs_slow))
227 error = gfs2_statfs_slow(sdp, &sc);
228 else
229 error = gfs2_statfs_i(sdp, &sc);
230
231 if (error)
232 return error;
233
234 memset(buf, 0, sizeof(struct kstatfs));
235
236 buf->f_type = GFS2_MAGIC;
237 buf->f_bsize = sdp->sd_sb.sb_bsize;
238 buf->f_blocks = sc.sc_total;
239 buf->f_bfree = sc.sc_free;
240 buf->f_bavail = sc.sc_free;
241 buf->f_files = sc.sc_dinodes + sc.sc_free;
242 buf->f_ffree = sc.sc_free;
243 buf->f_namelen = GFS2_FNAMESIZE;
244
245 return 0;
246}
247
248/**
249 * gfs2_remount_fs - called when the FS is remounted
250 * @sb: the filesystem
251 * @flags: the remount flags
252 * @data: extra data passed in (not used right now)
253 *
254 * Returns: errno
255 */
256
257static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
258{
259 struct gfs2_sbd *sdp = get_v2sdp(sb);
260 int error;
261
262 atomic_inc(&sdp->sd_ops_super);
263
264 error = gfs2_mount_args(sdp, data, 1);
265 if (error)
266 return error;
267
268 if (sdp->sd_args.ar_spectator)
269 *flags |= MS_RDONLY;
270 else {
271 if (*flags & MS_RDONLY) {
272 if (!(sb->s_flags & MS_RDONLY))
273 error = gfs2_make_fs_ro(sdp);
274 } else if (!(*flags & MS_RDONLY) &&
275 (sb->s_flags & MS_RDONLY)) {
276 error = gfs2_make_fs_rw(sdp);
277 }
278 }
279
280 if (*flags & (MS_NOATIME | MS_NODIRATIME))
281 set_bit(SDF_NOATIME, &sdp->sd_flags);
282 else
283 clear_bit(SDF_NOATIME, &sdp->sd_flags);
284
285 /* Don't let the VFS update atimes. GFS2 handles this itself. */
286 *flags |= MS_NOATIME | MS_NODIRATIME;
287
288 return error;
289}
290
291/**
292 * gfs2_clear_inode - Deallocate an inode when VFS is done with it
293 * @inode: The VFS inode
294 *
295 */
296
297static void gfs2_clear_inode(struct inode *inode)
298{
299 struct gfs2_inode *ip = get_v2ip(inode);
300
301 atomic_inc(&get_v2sdp(inode->i_sb)->sd_ops_super);
302
303 if (ip) {
304 spin_lock(&ip->i_spin);
305 ip->i_vnode = NULL;
306 set_v2ip(inode, NULL);
307 spin_unlock(&ip->i_spin);
308
309 gfs2_glock_schedule_for_reclaim(ip->i_gl);
310 gfs2_inode_put(ip);
311 }
312}
313
314/**
315 * gfs2_show_options - Show mount options for /proc/mounts
316 * @s: seq_file structure
317 * @mnt: vfsmount
318 *
319 * Returns: 0 on success or error code
320 */
321
322static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
323{
324 struct gfs2_sbd *sdp = get_v2sdp(mnt->mnt_sb);
325 struct gfs2_args *args = &sdp->sd_args;
326
327 atomic_inc(&sdp->sd_ops_super);
328
329 if (args->ar_lockproto[0])
330 seq_printf(s, ",lockproto=%s", args->ar_lockproto);
331 if (args->ar_locktable[0])
332 seq_printf(s, ",locktable=%s", args->ar_locktable);
333 if (args->ar_hostdata[0])
334 seq_printf(s, ",hostdata=%s", args->ar_hostdata);
335 if (args->ar_spectator)
336 seq_printf(s, ",spectator");
337 if (args->ar_ignore_local_fs)
338 seq_printf(s, ",ignore_local_fs");
339 if (args->ar_localflocks)
340 seq_printf(s, ",localflocks");
341 if (args->ar_localcaching)
342 seq_printf(s, ",localcaching");
343 if (args->ar_debug)
344 seq_printf(s, ",debug");
345 if (args->ar_upgrade)
346 seq_printf(s, ",upgrade");
347 if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT)
348 seq_printf(s, ",num_glockd=%u", args->ar_num_glockd);
349 if (args->ar_posix_acl)
350 seq_printf(s, ",acl");
351 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
352 char *state;
353 switch (args->ar_quota) {
354 case GFS2_QUOTA_OFF:
355 state = "off";
356 break;
357 case GFS2_QUOTA_ACCOUNT:
358 state = "account";
359 break;
360 case GFS2_QUOTA_ON:
361 state = "on";
362 break;
363 default:
364 state = "unknown";
365 break;
366 }
367 seq_printf(s, ",quota=%s", state);
368 }
369 if (args->ar_suiddir)
370 seq_printf(s, ",suiddir");
371 if (args->ar_data != GFS2_DATA_DEFAULT) {
372 char *state;
373 switch (args->ar_data) {
374 case GFS2_DATA_WRITEBACK:
375 state = "writeback";
376 break;
377 case GFS2_DATA_ORDERED:
378 state = "ordered";
379 break;
380 default:
381 state = "unknown";
382 break;
383 }
384 seq_printf(s, ",data=%s", state);
385 }
386
387 return 0;
388}
389
390struct super_operations gfs2_super_ops = {
391 .write_inode = gfs2_write_inode,
392 .put_super = gfs2_put_super,
393 .write_super = gfs2_write_super,
394 .write_super_lockfs = gfs2_write_super_lockfs,
395 .unlockfs = gfs2_unlockfs,
396 .statfs = gfs2_statfs,
397 .remount_fs = gfs2_remount_fs,
398 .clear_inode = gfs2_clear_inode,
399 .show_options = gfs2_show_options,
400};
401