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
)
161 gfs2_log_flush(sb
->s_fs_info
, NULL
);
166 * gfs2_write_super_lockfs - prevent further writes to the filesystem
167 * @sb: the VFS structure for the filesystem
171 static void gfs2_write_super_lockfs(struct super_block
*sb
)
173 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
176 if (test_bit(SDF_SHUTDOWN
, &sdp
->sd_flags
))
180 error
= gfs2_freeze_fs(sdp
);
186 fs_err(sdp
, "waiting for recovery before freeze\n");
190 fs_err(sdp
, "error freezing FS: %d\n", error
);
194 fs_err(sdp
, "retrying...\n");
200 * gfs2_unlockfs - reallow writes to the filesystem
201 * @sb: the VFS structure for the filesystem
205 static void gfs2_unlockfs(struct super_block
*sb
)
207 gfs2_unfreeze_fs(sb
->s_fs_info
);
211 * gfs2_statfs - Gather and return stats about the filesystem
212 * @sb: The superblock
213 * @statfsbuf: The buffer
215 * Returns: 0 on success or error code
218 static int gfs2_statfs(struct dentry
*dentry
, struct kstatfs
*buf
)
220 struct super_block
*sb
= dentry
->d_inode
->i_sb
;
221 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
222 struct gfs2_statfs_change_host sc
;
225 if (gfs2_tune_get(sdp
, gt_statfs_slow
))
226 error
= gfs2_statfs_slow(sdp
, &sc
);
228 error
= gfs2_statfs_i(sdp
, &sc
);
233 buf
->f_type
= GFS2_MAGIC
;
234 buf
->f_bsize
= sdp
->sd_sb
.sb_bsize
;
235 buf
->f_blocks
= sc
.sc_total
;
236 buf
->f_bfree
= sc
.sc_free
;
237 buf
->f_bavail
= sc
.sc_free
;
238 buf
->f_files
= sc
.sc_dinodes
+ sc
.sc_free
;
239 buf
->f_ffree
= sc
.sc_free
;
240 buf
->f_namelen
= GFS2_FNAMESIZE
;
246 * gfs2_remount_fs - called when the FS is remounted
247 * @sb: the filesystem
248 * @flags: the remount flags
249 * @data: extra data passed in (not used right now)
254 static int gfs2_remount_fs(struct super_block
*sb
, int *flags
, char *data
)
256 struct gfs2_sbd
*sdp
= sb
->s_fs_info
;
259 error
= gfs2_mount_args(sdp
, data
, 1);
263 if (sdp
->sd_args
.ar_spectator
)
266 if (*flags
& MS_RDONLY
) {
267 if (!(sb
->s_flags
& MS_RDONLY
))
268 error
= gfs2_make_fs_ro(sdp
);
269 } else if (!(*flags
& MS_RDONLY
) &&
270 (sb
->s_flags
& MS_RDONLY
)) {
271 error
= gfs2_make_fs_rw(sdp
);
275 if (*flags
& (MS_NOATIME
| MS_NODIRATIME
))
276 set_bit(SDF_NOATIME
, &sdp
->sd_flags
);
278 clear_bit(SDF_NOATIME
, &sdp
->sd_flags
);
280 /* Don't let the VFS update atimes. GFS2 handles this itself. */
281 *flags
|= MS_NOATIME
| MS_NODIRATIME
;
287 * gfs2_clear_inode - Deallocate an inode when VFS is done with it
288 * @inode: The VFS inode
292 static void gfs2_clear_inode(struct inode
*inode
)
294 /* This tells us its a "real" inode and not one which only
295 * serves to contain an address space (see rgrp.c, meta_io.c)
296 * which therefore doesn't have its own glocks.
298 if (inode
->i_private
) {
299 struct gfs2_inode
*ip
= GFS2_I(inode
);
300 ip
->i_gl
->gl_object
= NULL
;
301 gfs2_glock_schedule_for_reclaim(ip
->i_gl
);
302 gfs2_glock_put(ip
->i_gl
);
304 if (ip
->i_iopen_gh
.gh_gl
)
305 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
310 * gfs2_show_options - Show mount options for /proc/mounts
311 * @s: seq_file structure
314 * Returns: 0 on success or error code
317 static int gfs2_show_options(struct seq_file
*s
, struct vfsmount
*mnt
)
319 struct gfs2_sbd
*sdp
= mnt
->mnt_sb
->s_fs_info
;
320 struct gfs2_args
*args
= &sdp
->sd_args
;
322 if (args
->ar_lockproto
[0])
323 seq_printf(s
, ",lockproto=%s", args
->ar_lockproto
);
324 if (args
->ar_locktable
[0])
325 seq_printf(s
, ",locktable=%s", args
->ar_locktable
);
326 if (args
->ar_hostdata
[0])
327 seq_printf(s
, ",hostdata=%s", args
->ar_hostdata
);
328 if (args
->ar_spectator
)
329 seq_printf(s
, ",spectator");
330 if (args
->ar_ignore_local_fs
)
331 seq_printf(s
, ",ignore_local_fs");
332 if (args
->ar_localflocks
)
333 seq_printf(s
, ",localflocks");
334 if (args
->ar_localcaching
)
335 seq_printf(s
, ",localcaching");
337 seq_printf(s
, ",debug");
338 if (args
->ar_upgrade
)
339 seq_printf(s
, ",upgrade");
340 if (args
->ar_num_glockd
!= GFS2_GLOCKD_DEFAULT
)
341 seq_printf(s
, ",num_glockd=%u", args
->ar_num_glockd
);
342 if (args
->ar_posix_acl
)
343 seq_printf(s
, ",acl");
344 if (args
->ar_quota
!= GFS2_QUOTA_DEFAULT
) {
346 switch (args
->ar_quota
) {
350 case GFS2_QUOTA_ACCOUNT
:
360 seq_printf(s
, ",quota=%s", state
);
362 if (args
->ar_suiddir
)
363 seq_printf(s
, ",suiddir");
364 if (args
->ar_data
!= GFS2_DATA_DEFAULT
) {
366 switch (args
->ar_data
) {
367 case GFS2_DATA_WRITEBACK
:
370 case GFS2_DATA_ORDERED
:
377 seq_printf(s
, ",data=%s", state
);
384 * We have to (at the moment) hold the inodes main lock to cover
385 * the gap between unlocking the shared lock on the iopen lock and
386 * taking the exclusive lock. I'd rather do a shared -> exclusive
387 * conversion on the iopen lock, but we can change that later. This
388 * is safe, just less efficient.
390 static void gfs2_delete_inode(struct inode
*inode
)
392 struct gfs2_sbd
*sdp
= inode
->i_sb
->s_fs_info
;
393 struct gfs2_inode
*ip
= GFS2_I(inode
);
394 struct gfs2_holder gh
;
397 if (!inode
->i_private
)
400 error
= gfs2_glock_nq_init(ip
->i_gl
, LM_ST_EXCLUSIVE
, LM_FLAG_TRY_1CB
, &gh
);
401 if (unlikely(error
)) {
402 gfs2_glock_dq_uninit(&ip
->i_iopen_gh
);
406 gfs2_glock_dq(&ip
->i_iopen_gh
);
407 gfs2_holder_reinit(LM_ST_EXCLUSIVE
, LM_FLAG_TRY_1CB
| GL_NOCACHE
, &ip
->i_iopen_gh
);
408 error
= gfs2_glock_nq(&ip
->i_iopen_gh
);
412 if (S_ISDIR(inode
->i_mode
) &&
413 (ip
->i_di
.di_flags
& GFS2_DIF_EXHASH
)) {
414 error
= gfs2_dir_exhash_dealloc(ip
);
419 if (ip
->i_di
.di_eattr
) {
420 error
= gfs2_ea_dealloc(ip
);
425 if (!gfs2_is_stuffed(ip
)) {
426 error
= gfs2_file_dealloc(ip
);
431 error
= gfs2_dinode_dealloc(ip
);
433 * Must do this before unlock to avoid trying to write back
434 * potentially dirty data now that inode no longer exists
437 truncate_inode_pages(&inode
->i_data
, 0);
440 gfs2_glock_dq(&ip
->i_iopen_gh
);
442 gfs2_holder_uninit(&ip
->i_iopen_gh
);
443 gfs2_glock_dq_uninit(&gh
);
445 fs_warn(sdp
, "gfs2_delete_inode: %d\n", error
);
447 truncate_inode_pages(&inode
->i_data
, 0);
453 static struct inode
*gfs2_alloc_inode(struct super_block
*sb
)
455 struct gfs2_inode
*ip
;
457 ip
= kmem_cache_alloc(gfs2_inode_cachep
, GFP_KERNEL
);
461 ip
->i_last_pfault
= jiffies
;
466 static void gfs2_destroy_inode(struct inode
*inode
)
468 kmem_cache_free(gfs2_inode_cachep
, inode
);
471 const struct super_operations gfs2_super_ops
= {
472 .alloc_inode
= gfs2_alloc_inode
,
473 .destroy_inode
= gfs2_destroy_inode
,
474 .write_inode
= gfs2_write_inode
,
475 .delete_inode
= gfs2_delete_inode
,
476 .put_super
= gfs2_put_super
,
477 .write_super
= gfs2_write_super
,
478 .sync_fs
= gfs2_sync_fs
,
479 .write_super_lockfs
= gfs2_write_super_lockfs
,
480 .unlockfs
= gfs2_unlockfs
,
481 .statfs
= gfs2_statfs
,
482 .remount_fs
= gfs2_remount_fs
,
483 .clear_inode
= gfs2_clear_inode
,
484 .show_options
= gfs2_show_options
,