2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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.
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/statfs.h>
16 #include <linux/vmalloc.h>
17 #include <linux/seq_file.h>
18 #include <linux/mount.h>
19 #include <linux/kthread.h>
20 #include <linux/delay.h>
21 #include <linux/gfs2_ondisk.h>
22 #include <asm/semaphore.h>
25 #include "lm_interface.h"
32 #include "ops_super.h"
42 * gfs2_write_inode - Make sure the inode is stable on the disk
44 * @sync: synchronous write flag
49 static int gfs2_write_inode(struct inode *inode, int sync)
51 struct gfs2_inode *ip = inode->u.generic_ip;
53 if (current->flags & PF_MEMALLOC)
56 gfs2_log_flush(ip->i_gl->gl_sbd, ip->i_gl);
62 * gfs2_put_super - Unmount the filesystem
63 * @sb: The VFS superblock
67 static void gfs2_put_super(struct super_block *sb)
69 struct gfs2_sbd *sdp = sb->s_fs_info;
75 /* Unfreeze the filesystem, if we need to */
77 mutex_lock(&sdp->sd_freeze_lock);
78 if (sdp->sd_freeze_count)
79 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
80 mutex_unlock(&sdp->sd_freeze_lock);
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);
90 if (!(sb->s_flags & MS_RDONLY)) {
91 error = gfs2_make_fs_ro(sdp);
95 /* At this point, we're through modifying the disk */
99 iput(sdp->sd_master_dir);
100 iput(sdp->sd_jindex);
101 iput(sdp->sd_inum_inode);
102 iput(sdp->sd_statfs_inode);
103 iput(sdp->sd_rindex);
104 iput(sdp->sd_quota_inode);
106 gfs2_glock_put(sdp->sd_rename_gl);
107 gfs2_glock_put(sdp->sd_trans_gl);
109 if (!sdp->sd_args.ar_spectator) {
110 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
111 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
112 gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
113 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
114 gfs2_glock_dq_uninit(&sdp->sd_ut_gh);
115 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
116 iput(sdp->sd_ir_inode);
117 iput(sdp->sd_sc_inode);
118 iput(sdp->sd_ut_inode);
119 iput(sdp->sd_qc_inode);
122 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
123 gfs2_clear_rgrpd(sdp);
124 gfs2_jindex_free(sdp);
125 /* Take apart glock structures and buffer lists */
126 gfs2_gl_hash_clear(sdp, WAIT);
127 /* Unmount the locking protocol */
128 gfs2_lm_unmount(sdp);
130 /* At this point, we're through participating in the lockspace */
131 gfs2_sys_fs_del(sdp);
133 sb->s_fs_info = NULL;
137 * gfs2_write_super - disk commit all incore transactions
138 * @sb: the filesystem
140 * This function is called every time sync(2) is called.
141 * After this exits, all dirty buffers are synced.
144 static void gfs2_write_super(struct super_block *sb)
146 struct gfs2_sbd *sdp = sb->s_fs_info;
147 gfs2_log_flush(sdp, NULL);
151 * gfs2_write_super_lockfs - prevent further writes to the filesystem
152 * @sb: the VFS structure for the filesystem
156 static void gfs2_write_super_lockfs(struct super_block *sb)
158 struct gfs2_sbd *sdp = sb->s_fs_info;
162 error = gfs2_freeze_fs(sdp);
168 fs_err(sdp, "waiting for recovery before freeze\n");
172 fs_err(sdp, "error freezing FS: %d\n", error);
176 fs_err(sdp, "retrying...\n");
182 * gfs2_unlockfs - reallow writes to the filesystem
183 * @sb: the VFS structure for the filesystem
187 static void gfs2_unlockfs(struct super_block *sb)
189 struct gfs2_sbd *sdp = sb->s_fs_info;
190 gfs2_unfreeze_fs(sdp);
194 * gfs2_statfs - Gather and return stats about the filesystem
195 * @sb: The superblock
196 * @statfsbuf: The buffer
198 * Returns: 0 on success or error code
201 static int gfs2_statfs(struct super_block *sb, struct kstatfs *buf)
203 struct gfs2_sbd *sdp = sb->s_fs_info;
204 struct gfs2_statfs_change sc;
207 if (gfs2_tune_get(sdp, gt_statfs_slow))
208 error = gfs2_statfs_slow(sdp, &sc);
210 error = gfs2_statfs_i(sdp, &sc);
215 memset(buf, 0, sizeof(struct kstatfs));
217 buf->f_type = GFS2_MAGIC;
218 buf->f_bsize = sdp->sd_sb.sb_bsize;
219 buf->f_blocks = sc.sc_total;
220 buf->f_bfree = sc.sc_free;
221 buf->f_bavail = sc.sc_free;
222 buf->f_files = sc.sc_dinodes + sc.sc_free;
223 buf->f_ffree = sc.sc_free;
224 buf->f_namelen = GFS2_FNAMESIZE;
230 * gfs2_remount_fs - called when the FS is remounted
231 * @sb: the filesystem
232 * @flags: the remount flags
233 * @data: extra data passed in (not used right now)
238 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
240 struct gfs2_sbd *sdp = sb->s_fs_info;
243 error = gfs2_mount_args(sdp, data, 1);
247 if (sdp->sd_args.ar_spectator)
250 if (*flags & MS_RDONLY) {
251 if (!(sb->s_flags & MS_RDONLY))
252 error = gfs2_make_fs_ro(sdp);
253 } else if (!(*flags & MS_RDONLY) &&
254 (sb->s_flags & MS_RDONLY)) {
255 error = gfs2_make_fs_rw(sdp);
259 if (*flags & (MS_NOATIME | MS_NODIRATIME))
260 set_bit(SDF_NOATIME, &sdp->sd_flags);
262 clear_bit(SDF_NOATIME, &sdp->sd_flags);
264 /* Don't let the VFS update atimes. GFS2 handles this itself. */
265 *flags |= MS_NOATIME | MS_NODIRATIME;
271 * gfs2_clear_inode - Deallocate an inode when VFS is done with it
272 * @inode: The VFS inode
276 static void gfs2_clear_inode(struct inode *inode)
278 struct gfs2_inode *ip = inode->u.generic_ip;
281 spin_lock(&ip->i_spin);
283 inode->u.generic_ip = NULL;
284 spin_unlock(&ip->i_spin);
286 gfs2_glock_schedule_for_reclaim(ip->i_gl);
292 * gfs2_show_options - Show mount options for /proc/mounts
293 * @s: seq_file structure
296 * Returns: 0 on success or error code
299 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
301 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
302 struct gfs2_args *args = &sdp->sd_args;
304 if (args->ar_lockproto[0])
305 seq_printf(s, ",lockproto=%s", args->ar_lockproto);
306 if (args->ar_locktable[0])
307 seq_printf(s, ",locktable=%s", args->ar_locktable);
308 if (args->ar_hostdata[0])
309 seq_printf(s, ",hostdata=%s", args->ar_hostdata);
310 if (args->ar_spectator)
311 seq_printf(s, ",spectator");
312 if (args->ar_ignore_local_fs)
313 seq_printf(s, ",ignore_local_fs");
314 if (args->ar_localflocks)
315 seq_printf(s, ",localflocks");
316 if (args->ar_localcaching)
317 seq_printf(s, ",localcaching");
319 seq_printf(s, ",debug");
320 if (args->ar_upgrade)
321 seq_printf(s, ",upgrade");
322 if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT)
323 seq_printf(s, ",num_glockd=%u", args->ar_num_glockd);
324 if (args->ar_posix_acl)
325 seq_printf(s, ",acl");
326 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
328 switch (args->ar_quota) {
332 case GFS2_QUOTA_ACCOUNT:
342 seq_printf(s, ",quota=%s", state);
344 if (args->ar_suiddir)
345 seq_printf(s, ",suiddir");
346 if (args->ar_data != GFS2_DATA_DEFAULT) {
348 switch (args->ar_data) {
349 case GFS2_DATA_WRITEBACK:
352 case GFS2_DATA_ORDERED:
359 seq_printf(s, ",data=%s", state);
365 struct super_operations gfs2_super_ops = {
366 .write_inode = gfs2_write_inode,
367 .put_super = gfs2_put_super,
368 .write_super = gfs2_write_super,
369 .write_super_lockfs = gfs2_write_super_lockfs,
370 .unlockfs = gfs2_unlockfs,
371 .statfs = gfs2_statfs,
372 .remount_fs = gfs2_remount_fs,
373 .clear_inode = gfs2_clear_inode,
374 .show_options = gfs2_show_options,