2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 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 version 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/seq_file.h>
17 #include <linux/mount.h>
18 #include <linux/kthread.h>
19 #include <linux/delay.h>
20 #include <linux/gfs2_ondisk.h>
21 #include <linux/crc32.h>
22 #include <linux/lm_interface.h>
31 #include "ops_super.h"
44 * gfs2_write_inode - Make sure the inode is stable on the disk
46 * @sync: synchronous write flag
51 static int gfs2_write_inode(struct inode *inode, int sync)
53 struct gfs2_inode *ip = GFS2_I(inode);
55 /* Check this is a "normal" inode */
56 if (inode->i_private) {
57 if (current->flags & PF_MEMALLOC)
60 gfs2_log_flush(GFS2_SB(inode), ip->i_gl);
67 * gfs2_put_super - Unmount the filesystem
68 * @sb: The VFS superblock
72 static void gfs2_put_super(struct super_block *sb)
74 struct gfs2_sbd *sdp = sb->s_fs_info;
80 if (!strncmp(sb->s_type->name, "gfs2meta", 8))
81 return; /* Nothing to do */
83 /* Unfreeze the filesystem, if we need to */
85 mutex_lock(&sdp->sd_freeze_lock);
86 if (sdp->sd_freeze_count)
87 gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
88 mutex_unlock(&sdp->sd_freeze_lock);
90 kthread_stop(sdp->sd_quotad_process);
91 kthread_stop(sdp->sd_logd_process);
92 kthread_stop(sdp->sd_recoverd_process);
93 while (sdp->sd_glockd_num--)
94 kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]);
95 kthread_stop(sdp->sd_scand_process);
97 if (!(sb->s_flags & MS_RDONLY)) {
98 error = gfs2_make_fs_ro(sdp);
102 /* At this point, we're through modifying the disk */
106 iput(sdp->sd_master_dir);
107 iput(sdp->sd_jindex);
108 iput(sdp->sd_inum_inode);
109 iput(sdp->sd_statfs_inode);
110 iput(sdp->sd_rindex);
111 iput(sdp->sd_quota_inode);
113 gfs2_glock_put(sdp->sd_rename_gl);
114 gfs2_glock_put(sdp->sd_trans_gl);
116 if (!sdp->sd_args.ar_spectator) {
117 gfs2_glock_dq_uninit(&sdp->sd_journal_gh);
118 gfs2_glock_dq_uninit(&sdp->sd_jinode_gh);
119 gfs2_glock_dq_uninit(&sdp->sd_ir_gh);
120 gfs2_glock_dq_uninit(&sdp->sd_sc_gh);
121 gfs2_glock_dq_uninit(&sdp->sd_qc_gh);
122 iput(sdp->sd_ir_inode);
123 iput(sdp->sd_sc_inode);
124 iput(sdp->sd_qc_inode);
127 gfs2_glock_dq_uninit(&sdp->sd_live_gh);
128 gfs2_clear_rgrpd(sdp);
129 gfs2_jindex_free(sdp);
130 /* Take apart glock structures and buffer lists */
131 gfs2_gl_hash_clear(sdp, WAIT);
132 /* Unmount the locking protocol */
133 gfs2_lm_unmount(sdp);
135 /* At this point, we're through participating in the lockspace */
136 gfs2_sys_fs_del(sdp);
142 * @sb: the superblock
146 static void gfs2_write_super(struct super_block *sb)
152 * gfs2_sync_fs - sync the filesystem
153 * @sb: the superblock
155 * Flushes the log to disk.
157 static int gfs2_sync_fs(struct super_block *sb, int wait)
160 gfs2_log_flush(sb->s_fs_info, NULL);
165 * gfs2_write_super_lockfs - prevent further writes to the filesystem
166 * @sb: the VFS structure for the filesystem
170 static void gfs2_write_super_lockfs(struct super_block *sb)
172 struct gfs2_sbd *sdp = sb->s_fs_info;
176 error = gfs2_freeze_fs(sdp);
182 fs_err(sdp, "waiting for recovery before freeze\n");
186 fs_err(sdp, "error freezing FS: %d\n", error);
190 fs_err(sdp, "retrying...\n");
196 * gfs2_unlockfs - reallow writes to the filesystem
197 * @sb: the VFS structure for the filesystem
201 static void gfs2_unlockfs(struct super_block *sb)
203 gfs2_unfreeze_fs(sb->s_fs_info);
207 * gfs2_statfs - Gather and return stats about the filesystem
208 * @sb: The superblock
209 * @statfsbuf: The buffer
211 * Returns: 0 on success or error code
214 static int gfs2_statfs(struct dentry *dentry, struct kstatfs *buf)
216 struct super_block *sb = dentry->d_inode->i_sb;
217 struct gfs2_sbd *sdp = sb->s_fs_info;
218 struct gfs2_statfs_change_host sc;
221 if (gfs2_tune_get(sdp, gt_statfs_slow))
222 error = gfs2_statfs_slow(sdp, &sc);
224 error = gfs2_statfs_i(sdp, &sc);
229 buf->f_type = GFS2_MAGIC;
230 buf->f_bsize = sdp->sd_sb.sb_bsize;
231 buf->f_blocks = sc.sc_total;
232 buf->f_bfree = sc.sc_free;
233 buf->f_bavail = sc.sc_free;
234 buf->f_files = sc.sc_dinodes + sc.sc_free;
235 buf->f_ffree = sc.sc_free;
236 buf->f_namelen = GFS2_FNAMESIZE;
242 * gfs2_remount_fs - called when the FS is remounted
243 * @sb: the filesystem
244 * @flags: the remount flags
245 * @data: extra data passed in (not used right now)
250 static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
252 struct gfs2_sbd *sdp = sb->s_fs_info;
255 error = gfs2_mount_args(sdp, data, 1);
259 if (sdp->sd_args.ar_spectator)
262 if (*flags & MS_RDONLY) {
263 if (!(sb->s_flags & MS_RDONLY))
264 error = gfs2_make_fs_ro(sdp);
265 } else if (!(*flags & MS_RDONLY) &&
266 (sb->s_flags & MS_RDONLY)) {
267 error = gfs2_make_fs_rw(sdp);
271 if (*flags & (MS_NOATIME | MS_NODIRATIME))
272 set_bit(SDF_NOATIME, &sdp->sd_flags);
274 clear_bit(SDF_NOATIME, &sdp->sd_flags);
276 /* Don't let the VFS update atimes. GFS2 handles this itself. */
277 *flags |= MS_NOATIME | MS_NODIRATIME;
283 * gfs2_clear_inode - Deallocate an inode when VFS is done with it
284 * @inode: The VFS inode
288 static void gfs2_clear_inode(struct inode *inode)
290 /* This tells us its a "real" inode and not one which only
291 * serves to contain an address space (see rgrp.c, meta_io.c)
292 * which therefore doesn't have its own glocks.
294 if (inode->i_private) {
295 struct gfs2_inode *ip = GFS2_I(inode);
296 gfs2_glock_inode_squish(inode);
297 gfs2_assert(inode->i_sb->s_fs_info, ip->i_gl->gl_state == LM_ST_UNLOCKED);
298 ip->i_gl->gl_object = NULL;
299 gfs2_glock_schedule_for_reclaim(ip->i_gl);
300 gfs2_glock_put(ip->i_gl);
302 if (ip->i_iopen_gh.gh_gl)
303 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
308 * gfs2_show_options - Show mount options for /proc/mounts
309 * @s: seq_file structure
312 * Returns: 0 on success or error code
315 static int gfs2_show_options(struct seq_file *s, struct vfsmount *mnt)
317 struct gfs2_sbd *sdp = mnt->mnt_sb->s_fs_info;
318 struct gfs2_args *args = &sdp->sd_args;
320 if (args->ar_lockproto[0])
321 seq_printf(s, ",lockproto=%s", args->ar_lockproto);
322 if (args->ar_locktable[0])
323 seq_printf(s, ",locktable=%s", args->ar_locktable);
324 if (args->ar_hostdata[0])
325 seq_printf(s, ",hostdata=%s", args->ar_hostdata);
326 if (args->ar_spectator)
327 seq_printf(s, ",spectator");
328 if (args->ar_ignore_local_fs)
329 seq_printf(s, ",ignore_local_fs");
330 if (args->ar_localflocks)
331 seq_printf(s, ",localflocks");
332 if (args->ar_localcaching)
333 seq_printf(s, ",localcaching");
335 seq_printf(s, ",debug");
336 if (args->ar_upgrade)
337 seq_printf(s, ",upgrade");
338 if (args->ar_num_glockd != GFS2_GLOCKD_DEFAULT)
339 seq_printf(s, ",num_glockd=%u", args->ar_num_glockd);
340 if (args->ar_posix_acl)
341 seq_printf(s, ",acl");
342 if (args->ar_quota != GFS2_QUOTA_DEFAULT) {
344 switch (args->ar_quota) {
348 case GFS2_QUOTA_ACCOUNT:
358 seq_printf(s, ",quota=%s", state);
360 if (args->ar_suiddir)
361 seq_printf(s, ",suiddir");
362 if (args->ar_data != GFS2_DATA_DEFAULT) {
364 switch (args->ar_data) {
365 case GFS2_DATA_WRITEBACK:
368 case GFS2_DATA_ORDERED:
375 seq_printf(s, ",data=%s", state);
382 * We have to (at the moment) hold the inodes main lock to cover
383 * the gap between unlocking the shared lock on the iopen lock and
384 * taking the exclusive lock. I'd rather do a shared -> exclusive
385 * conversion on the iopen lock, but we can change that later. This
386 * is safe, just less efficient.
388 static void gfs2_delete_inode(struct inode *inode)
390 struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
391 struct gfs2_inode *ip = GFS2_I(inode);
392 struct gfs2_holder gh;
395 if (!inode->i_private)
398 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &gh);
399 if (unlikely(error)) {
400 gfs2_glock_dq_uninit(&ip->i_iopen_gh);
404 gfs2_glock_dq(&ip->i_iopen_gh);
405 gfs2_holder_reinit(LM_ST_EXCLUSIVE, LM_FLAG_TRY_1CB | GL_NOCACHE, &ip->i_iopen_gh);
406 error = gfs2_glock_nq(&ip->i_iopen_gh);
410 if (S_ISDIR(inode->i_mode) &&
411 (ip->i_di.di_flags & GFS2_DIF_EXHASH)) {
412 error = gfs2_dir_exhash_dealloc(ip);
417 if (ip->i_di.di_eattr) {
418 error = gfs2_ea_dealloc(ip);
423 if (!gfs2_is_stuffed(ip)) {
424 error = gfs2_file_dealloc(ip);
429 error = gfs2_dinode_dealloc(ip);
432 gfs2_glock_dq(&ip->i_iopen_gh);
434 gfs2_holder_uninit(&ip->i_iopen_gh);
435 gfs2_glock_dq_uninit(&gh);
437 fs_warn(sdp, "gfs2_delete_inode: %d\n", error);
439 truncate_inode_pages(&inode->i_data, 0);
445 static struct inode *gfs2_alloc_inode(struct super_block *sb)
447 struct gfs2_sbd *sdp = sb->s_fs_info;
448 struct gfs2_inode *ip;
450 ip = kmem_cache_alloc(gfs2_inode_cachep, GFP_KERNEL);
454 ip->i_greedy = gfs2_tune_get(sdp, gt_greedy_default);
455 ip->i_last_pfault = jiffies;
460 static void gfs2_destroy_inode(struct inode *inode)
462 kmem_cache_free(gfs2_inode_cachep, inode);
465 struct super_operations gfs2_super_ops = {
466 .alloc_inode = gfs2_alloc_inode,
467 .destroy_inode = gfs2_destroy_inode,
468 .write_inode = gfs2_write_inode,
469 .delete_inode = gfs2_delete_inode,
470 .put_super = gfs2_put_super,
471 .write_super = gfs2_write_super,
472 .sync_fs = gfs2_sync_fs,
473 .write_super_lockfs = gfs2_write_super_lockfs,
474 .unlockfs = gfs2_unlockfs,
475 .statfs = gfs2_statfs,
476 .remount_fs = gfs2_remount_fs,
477 .clear_inode = gfs2_clear_inode,
478 .show_options = gfs2_show_options,