[linux-2.6-block.git] / fs / gfs2 / glops.c

/*
 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
 *
 * This copyrighted material is made available to anyone wishing to use,
 * modify, copy, or redistribute it subject to the terms and conditions
 * of the GNU General Public License version 2.
 */

#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
#include <linux/bio.h>

#include "gfs2.h"
#include "incore.h"
#include "bmap.h"
#include "glock.h"
#include "glops.h"
#include "inode.h"
#include "log.h"
#include "meta_io.h"
#include "recovery.h"
#include "rgrp.h"
#include "util.h"
#include "trans.h"

/**
 * ail_empty_gl - remove all buffers for a given lock from the AIL
 * @gl: the glock
 *
 * None of the buffers should be dirty, locked, or pinned.
 */

static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	unsigned int blocks;
	struct list_head *head = &gl->gl_ail_list;
	struct gfs2_bufdata *bd;
	struct buffer_head *bh;
	int error;

	blocks = atomic_read(&gl->gl_ail_count);
	if (!blocks)
		return;

	error = gfs2_trans_begin(sdp, 0, blocks);
	if (gfs2_assert_withdraw(sdp, !error))
		return;

	gfs2_log_lock(sdp);
	while (!list_empty(head)) {
		bd = list_entry(head->next, struct gfs2_bufdata,
				bd_ail_gl_list);
		bh = bd->bd_bh;
		gfs2_remove_from_ail(bd);
		bd->bd_bh = NULL;
		bh->b_private = NULL;
		bd->bd_blkno = bh->b_blocknr;
		gfs2_assert_withdraw(sdp, !buffer_busy(bh));
		gfs2_trans_add_revoke(sdp, bd);
	}
	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
	gfs2_log_unlock(sdp);

	gfs2_trans_end(sdp);
	gfs2_log_flush(sdp, NULL);
}

/**
 * gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
 * @gl: the glock
 *
 */

static void gfs2_pte_inval(struct gfs2_glock *gl)
{
	struct gfs2_inode *ip;
	struct inode *inode;

	ip = gl->gl_object;
	inode = &ip->i_inode;
	if (!ip || !S_ISREG(inode->i_mode))
		return;

	unmap_shared_mapping_range(inode->i_mapping, 0, 0);
	if (test_bit(GIF_SW_PAGED, &ip->i_flags))
		set_bit(GLF_DIRTY, &gl->gl_flags);

}

/**
 * meta_go_sync - sync out the metadata for this glock
 * @gl: the glock
 *
 * Called when demoting or unlocking an EX glock.  We must flush
 * to disk all dirty buffers/pages relating to this glock, and must not
 * not return to caller to demote/unlock the glock until I/O is complete.
 */

static void meta_go_sync(struct gfs2_glock *gl)
{
	if (gl->gl_state != LM_ST_EXCLUSIVE)
		return;

	if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) {
		gfs2_log_flush(gl->gl_sbd, gl);
		gfs2_meta_sync(gl);
		gfs2_ail_empty_gl(gl);
	}
}

/**
 * meta_go_inval - invalidate the metadata for this glock
 * @gl: the glock
 * @flags:
 *
 */

static void meta_go_inval(struct gfs2_glock *gl, int flags)
{
	if (!(flags & DIO_METADATA))
		return;

	gfs2_meta_inval(gl);
	if (gl->gl_object == GFS2_I(gl->gl_sbd->sd_rindex))
		gl->gl_sbd->sd_rindex_uptodate = 0;
	else if (gl->gl_ops == &gfs2_rgrp_glops && gl->gl_object) {
		struct gfs2_rgrpd *rgd = (struct gfs2_rgrpd *)gl->gl_object;

		rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
	}
}

/**
 * inode_go_sync - Sync the dirty data and/or metadata for an inode glock
 * @gl: the glock protecting the inode
 *
 */

static void inode_go_sync(struct gfs2_glock *gl)
{
	struct gfs2_inode *ip = gl->gl_object;
	struct address_space *metamapping = gl->gl_aspace->i_mapping;
	int error;

	if (gl->gl_state != LM_ST_UNLOCKED)
		gfs2_pte_inval(gl);
	if (gl->gl_state != LM_ST_EXCLUSIVE)
		return;

	if (ip && !S_ISREG(ip->i_inode.i_mode))
		ip = NULL;

	if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
		gfs2_log_flush(gl->gl_sbd, gl);
		filemap_fdatawrite(metamapping);
		if (ip) {
			struct address_space *mapping = ip->i_inode.i_mapping;
			filemap_fdatawrite(mapping);
			error = filemap_fdatawait(mapping);
			mapping_set_error(mapping, error);
		}
		error = filemap_fdatawait(metamapping);
		mapping_set_error(metamapping, error);
		clear_bit(GLF_DIRTY, &gl->gl_flags);
		gfs2_ail_empty_gl(gl);
	}
}

/**
 * inode_go_inval - prepare a inode glock to be released
 * @gl: the glock
 * @flags:
 *
 */

static void inode_go_inval(struct gfs2_glock *gl, int flags)
{
	struct gfs2_inode *ip = gl->gl_object;
	int meta = (flags & DIO_METADATA);

	if (meta) {
		gfs2_meta_inval(gl);
		if (ip)
			set_bit(GIF_INVALID, &ip->i_flags);
	}

	if (ip && S_ISREG(ip->i_inode.i_mode))
		truncate_inode_pages(ip->i_inode.i_mapping, 0);
}

/**
 * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
 * @gl: the glock
 *
 * Returns: 1 if it's ok
 */

static int inode_go_demote_ok(const struct gfs2_glock *gl)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
		return 0;
	return 1;
}

/**
 * inode_go_lock - operation done after an inode lock is locked by a process
 * @gl: the glock
 * @flags:
 *
 * Returns: errno
 */

static int inode_go_lock(struct gfs2_holder *gh)
{
	struct gfs2_glock *gl = gh->gh_gl;
	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct gfs2_inode *ip = gl->gl_object;
	int error = 0;

	if (!ip || (gh->gh_flags & GL_SKIP))
		return 0;

	if (test_bit(GIF_INVALID, &ip->i_flags)) {
		error = gfs2_inode_refresh(ip);
		if (error)
			return error;
	}

	if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
	    (gl->gl_state == LM_ST_EXCLUSIVE) &&
	    (gh->gh_state == LM_ST_EXCLUSIVE)) {
		spin_lock(&sdp->sd_trunc_lock);
		if (list_empty(&ip->i_trunc_list))
			list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
		spin_unlock(&sdp->sd_trunc_lock);
		wake_up(&sdp->sd_quota_wait);
		return 1;
	}

	return error;
}

/**
 * inode_go_dump - print information about an inode
 * @seq: The iterator
 * @ip: the inode
 *
 * Returns: 0 on success, -ENOBUFS when we run out of space
 */

static int inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
{
	const struct gfs2_inode *ip = gl->gl_object;
	if (ip == NULL)
		return 0;
	gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu/%llu\n",
		  (unsigned long long)ip->i_no_formal_ino,
		  (unsigned long long)ip->i_no_addr,
		  IF2DT(ip->i_inode.i_mode), ip->i_flags,
		  (unsigned int)ip->i_diskflags,
		  (unsigned long long)ip->i_inode.i_size,
		  (unsigned long long)ip->i_disksize);
	return 0;
}

/**
 * rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock
 * @gl: the glock
 *
 * Returns: 1 if it's ok
 */

static int rgrp_go_demote_ok(const struct gfs2_glock *gl)
{
	return !gl->gl_aspace->i_mapping->nrpages;
}

/**
 * rgrp_go_lock - operation done after an rgrp lock is locked by
 *    a first holder on this node.
 * @gl: the glock
 * @flags:
 *
 * Returns: errno
 */

static int rgrp_go_lock(struct gfs2_holder *gh)
{
	return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
}

/**
 * rgrp_go_unlock - operation done before an rgrp lock is unlocked by
 *    a last holder on this node.
 * @gl: the glock
 * @flags:
 *
 */

static void rgrp_go_unlock(struct gfs2_holder *gh)
{
	gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
}

/**
 * rgrp_go_dump - print out an rgrp
 * @seq: The iterator
 * @gl: The glock in question
 *
 */

static int rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
{
	const struct gfs2_rgrpd *rgd = gl->gl_object;
	if (rgd == NULL)
		return 0;
	gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n",
		       (unsigned long long)rgd->rd_addr, rgd->rd_flags,
		       rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes);
	return 0;
}

/**
 * trans_go_sync - promote/demote the transaction glock
 * @gl: the glock
 * @state: the requested state
 * @flags:
 *
 */

static void trans_go_sync(struct gfs2_glock *gl)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;

	if (gl->gl_state != LM_ST_UNLOCKED &&
	    test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
		gfs2_meta_syncfs(sdp);
		gfs2_log_shutdown(sdp);
	}
}

/**
 * trans_go_xmote_bh - After promoting/demoting the transaction glock
 * @gl: the glock
 *
 */

static int trans_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
	struct gfs2_glock *j_gl = ip->i_gl;
	struct gfs2_log_header_host head;
	int error;

	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
		j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);

		error = gfs2_find_jhead(sdp->sd_jdesc, &head);
		if (error)
			gfs2_consist(sdp);
		if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
			gfs2_consist(sdp);

		/*  Initialize some head of the log stuff  */
		if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
			sdp->sd_log_sequence = head.lh_sequence + 1;
			gfs2_log_pointers_init(sdp, head.lh_blkno);
		}
	}
	return 0;
}

/**
 * trans_go_demote_ok
 * @gl: the glock
 *
 * Always returns 0
 */

static int trans_go_demote_ok(const struct gfs2_glock *gl)
{
	return 0;
}

/**
 * quota_go_demote_ok - Check to see if it's ok to unlock a quota glock
 * @gl: the glock
 *
 * Returns: 1 if it's ok
 */

static int quota_go_demote_ok(const struct gfs2_glock *gl)
{
	return !atomic_read(&gl->gl_lvb_count);
}

const struct gfs2_glock_operations gfs2_meta_glops = {
	.go_xmote_th = meta_go_sync,
	.go_type = LM_TYPE_META,
};

const struct gfs2_glock_operations gfs2_inode_glops = {
	.go_xmote_th = inode_go_sync,
	.go_inval = inode_go_inval,
	.go_demote_ok = inode_go_demote_ok,
	.go_lock = inode_go_lock,
	.go_dump = inode_go_dump,
	.go_type = LM_TYPE_INODE,
	.go_min_hold_time = HZ / 5,
};

const struct gfs2_glock_operations gfs2_rgrp_glops = {
	.go_xmote_th = meta_go_sync,
	.go_inval = meta_go_inval,
	.go_demote_ok = rgrp_go_demote_ok,
	.go_lock = rgrp_go_lock,
	.go_unlock = rgrp_go_unlock,
	.go_dump = rgrp_go_dump,
	.go_type = LM_TYPE_RGRP,
	.go_min_hold_time = HZ / 5,
};

const struct gfs2_glock_operations gfs2_trans_glops = {
	.go_xmote_th = trans_go_sync,
	.go_xmote_bh = trans_go_xmote_bh,
	.go_demote_ok = trans_go_demote_ok,
	.go_type = LM_TYPE_NONDISK,
};

const struct gfs2_glock_operations gfs2_iopen_glops = {
	.go_type = LM_TYPE_IOPEN,
};

const struct gfs2_glock_operations gfs2_flock_glops = {
	.go_type = LM_TYPE_FLOCK,
};

const struct gfs2_glock_operations gfs2_nondisk_glops = {
	.go_type = LM_TYPE_NONDISK,
};

const struct gfs2_glock_operations gfs2_quota_glops = {
	.go_demote_ok = quota_go_demote_ok,
	.go_type = LM_TYPE_QUOTA,
};

const struct gfs2_glock_operations gfs2_journal_glops = {
	.go_type = LM_TYPE_JOURNAL,
};
Commit	Line	Data
b3b94faa DT	1	/*
b3b94faa DT	2	* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
cf45b752	3	* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
b3b94faa DT	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
e9fc2aa0	7	* of the GNU General Public License version 2.
b3b94faa DT	8	*/
b3b94faa DT	9
b3b94faa DT	10	#include <linux/slab.h>
	11	#include <linux/spinlock.h>
	12	#include <linux/completion.h>
	13	#include <linux/buffer_head.h>
5c676f6d	14	#include <linux/gfs2_ondisk.h>
7d308590	15	#include <linux/lm_interface.h>
6802e340	16	#include <linux/bio.h>
b3b94faa DT	17
b3b94faa DT	18	#include "gfs2.h"
5c676f6d	19	#include "incore.h"
b3b94faa DT	20	#include "bmap.h"
	21	#include "glock.h"
	22	#include "glops.h"
	23	#include "inode.h"
	24	#include "log.h"
	25	#include "meta_io.h"
b3b94faa DT	26	#include "recovery.h"
b3b94faa DT	27	#include "rgrp.h"
5c676f6d	28	#include "util.h"
ddacfaf7	29	#include "trans.h"
b3b94faa	30
ddacfaf7 SW	31	/**
	32	* ail_empty_gl - remove all buffers for a given lock from the AIL
	33	* @gl: the glock
	34	*
	35	* None of the buffers should be dirty, locked, or pinned.
	36	*/
	37
	38	static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
	39	{
	40	struct gfs2_sbd *sdp = gl->gl_sbd;
	41	unsigned int blocks;
	42	struct list_head *head = &gl->gl_ail_list;
	43	struct gfs2_bufdata *bd;
	44	struct buffer_head *bh;
ddacfaf7 SW	45	int error;
	46
	47	blocks = atomic_read(&gl->gl_ail_count);
	48	if (!blocks)
	49	return;
	50
	51	error = gfs2_trans_begin(sdp, 0, blocks);
	52	if (gfs2_assert_withdraw(sdp, !error))
	53	return;
	54
	55	gfs2_log_lock(sdp);
	56	while (!list_empty(head)) {
	57	bd = list_entry(head->next, struct gfs2_bufdata,
	58	bd_ail_gl_list);
	59	bh = bd->bd_bh;
f91a0d3e	60	gfs2_remove_from_ail(bd);
1ad38c43 SW	61	bd->bd_bh = NULL;
	62	bh->b_private = NULL;
	63	bd->bd_blkno = bh->b_blocknr;
	64	gfs2_assert_withdraw(sdp, !buffer_busy(bh));
	65	gfs2_trans_add_revoke(sdp, bd);
ddacfaf7 SW	66	}
	67	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
	68	gfs2_log_unlock(sdp);
	69
	70	gfs2_trans_end(sdp);
	71	gfs2_log_flush(sdp, NULL);
	72	}
ba7f7290 SW	73
	74	/**
	75	* gfs2_pte_inval - Sync and invalidate all PTEs associated with a glock
	76	* @gl: the glock
	77	*
	78	*/
	79
	80	static void gfs2_pte_inval(struct gfs2_glock *gl)
	81	{
	82	struct gfs2_inode *ip;
	83	struct inode *inode;
	84
	85	ip = gl->gl_object;
	86	inode = &ip->i_inode;
b60623c2	87	if (!ip \|\| !S_ISREG(inode->i_mode))
ba7f7290 SW	88	return;
ba7f7290 SW	89
ba7f7290	90	unmap_shared_mapping_range(inode->i_mapping, 0, 0);
ba7f7290 SW	91	if (test_bit(GIF_SW_PAGED, &ip->i_flags))
	92	set_bit(GLF_DIRTY, &gl->gl_flags);
	93
ba7f7290 SW	94	}
ba7f7290 SW	95
b3b94faa DT	96	/**
	97	* meta_go_sync - sync out the metadata for this glock
	98	* @gl: the glock
b3b94faa DT	99	*
	100	* Called when demoting or unlocking an EX glock. We must flush
	101	* to disk all dirty buffers/pages relating to this glock, and must not
	102	* not return to caller to demote/unlock the glock until I/O is complete.
	103	*/
	104
1a14d3a6	105	static void meta_go_sync(struct gfs2_glock *gl)
b3b94faa	106	{
b5d32bea SW	107	if (gl->gl_state != LM_ST_EXCLUSIVE)
	108	return;
	109
b3b94faa	110	if (test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) {
b09e593d	111	gfs2_log_flush(gl->gl_sbd, gl);
7276b3b0	112	gfs2_meta_sync(gl);
1a14d3a6	113	gfs2_ail_empty_gl(gl);
b3b94faa	114	}
b3b94faa DT	115	}
	116
	117	/**
	118	* meta_go_inval - invalidate the metadata for this glock
	119	* @gl: the glock
	120	* @flags:
	121	*
	122	*/
	123
	124	static void meta_go_inval(struct gfs2_glock *gl, int flags)
	125	{
	126	if (!(flags & DIO_METADATA))
	127	return;
	128
	129	gfs2_meta_inval(gl);
cf45b752 BP	130	if (gl->gl_object == GFS2_I(gl->gl_sbd->sd_rindex))
	131	gl->gl_sbd->sd_rindex_uptodate = 0;
	132	else if (gl->gl_ops == &gfs2_rgrp_glops && gl->gl_object) {
	133	struct gfs2_rgrpd rgd = (struct gfs2_rgrpd )gl->gl_object;
	134
	135	rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
	136	}
b3b94faa DT	137	}
b3b94faa DT	138
b5d32bea SW	139	/**
	140	* inode_go_sync - Sync the dirty data and/or metadata for an inode glock
	141	* @gl: the glock protecting the inode
	142	*
	143	*/
	144
	145	static void inode_go_sync(struct gfs2_glock *gl)
	146	{
	147	struct gfs2_inode *ip = gl->gl_object;
3042a2cc SW	148	struct address_space *metamapping = gl->gl_aspace->i_mapping;
	149	int error;
	150
	151	if (gl->gl_state != LM_ST_UNLOCKED)
	152	gfs2_pte_inval(gl);
	153	if (gl->gl_state != LM_ST_EXCLUSIVE)
	154	return;
b5d32bea SW	155
	156	if (ip && !S_ISREG(ip->i_inode.i_mode))
	157	ip = NULL;
	158
	159	if (test_bit(GLF_DIRTY, &gl->gl_flags)) {
b524fe64	160	gfs2_log_flush(gl->gl_sbd, gl);
3042a2cc	161	filemap_fdatawrite(metamapping);
b5d32bea SW	162	if (ip) {
b5d32bea SW	163	struct address_space *mapping = ip->i_inode.i_mapping;
3042a2cc SW	164	filemap_fdatawrite(mapping);
3042a2cc SW	165	error = filemap_fdatawait(mapping);
3e9f45bd	166	mapping_set_error(mapping, error);
b5d32bea	167	}
3042a2cc SW	168	error = filemap_fdatawait(metamapping);
3042a2cc SW	169	mapping_set_error(metamapping, error);
b5d32bea SW	170	clear_bit(GLF_DIRTY, &gl->gl_flags);
	171	gfs2_ail_empty_gl(gl);
	172	}
	173	}
	174
b3b94faa DT	175	/**
	176	* inode_go_inval - prepare a inode glock to be released
	177	* @gl: the glock
	178	* @flags:
	179	*
	180	*/
	181
	182	static void inode_go_inval(struct gfs2_glock *gl, int flags)
	183	{
b004157a	184	struct gfs2_inode *ip = gl->gl_object;
b3b94faa	185	int meta = (flags & DIO_METADATA);
b3b94faa DT	186
	187	if (meta) {
	188	gfs2_meta_inval(gl);
b004157a SW	189	if (ip)
	190	set_bit(GIF_INVALID, &ip->i_flags);
	191	}
	192
3cc3f710	193	if (ip && S_ISREG(ip->i_inode.i_mode))
b004157a	194	truncate_inode_pages(ip->i_inode.i_mapping, 0);
b3b94faa DT	195	}
	196
	197	/**
	198	* inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
	199	* @gl: the glock
	200	*
	201	* Returns: 1 if it's ok
	202	*/
	203
97cc1025	204	static int inode_go_demote_ok(const struct gfs2_glock *gl)
b3b94faa DT	205	{
b3b94faa DT	206	struct gfs2_sbd *sdp = gl->gl_sbd;
97cc1025 SW	207	if (sdp->sd_jindex == gl->gl_object \|\| sdp->sd_rindex == gl->gl_object)
	208	return 0;
	209	return 1;
b3b94faa DT	210	}
	211
	212	/**
	213	* inode_go_lock - operation done after an inode lock is locked by a process
	214	* @gl: the glock
	215	* @flags:
	216	*
	217	* Returns: errno
	218	*/
	219
	220	static int inode_go_lock(struct gfs2_holder *gh)
	221	{
	222	struct gfs2_glock *gl = gh->gh_gl;
813e0c46	223	struct gfs2_sbd *sdp = gl->gl_sbd;
5c676f6d	224	struct gfs2_inode *ip = gl->gl_object;
b3b94faa DT	225	int error = 0;
b3b94faa DT	226
091806ed	227	if (!ip \|\| (gh->gh_flags & GL_SKIP))
b3b94faa DT	228	return 0;
b3b94faa DT	229
bfded27b	230	if (test_bit(GIF_INVALID, &ip->i_flags)) {
b3b94faa DT	231	error = gfs2_inode_refresh(ip);
	232	if (error)
	233	return error;
b3b94faa DT	234	}
b3b94faa DT	235
383f01fb	236	if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
b3b94faa	237	(gl->gl_state == LM_ST_EXCLUSIVE) &&
813e0c46 SW	238	(gh->gh_state == LM_ST_EXCLUSIVE)) {
	239	spin_lock(&sdp->sd_trunc_lock);
	240	if (list_empty(&ip->i_trunc_list))
	241	list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
	242	spin_unlock(&sdp->sd_trunc_lock);
	243	wake_up(&sdp->sd_quota_wait);
	244	return 1;
	245	}
b3b94faa DT	246
	247	return error;
	248	}
	249
6802e340 SW	250	/**
	251	* inode_go_dump - print information about an inode
	252	* @seq: The iterator
	253	* @ip: the inode
	254	*
	255	* Returns: 0 on success, -ENOBUFS when we run out of space
	256	*/
	257
	258	static int inode_go_dump(struct seq_file seq, const struct gfs2_glock gl)
	259	{
	260	const struct gfs2_inode *ip = gl->gl_object;
	261	if (ip == NULL)
	262	return 0;
fa75cedc	263	gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu/%llu\n",
6802e340 SW	264	(unsigned long long)ip->i_no_formal_ino,
6802e340 SW	265	(unsigned long long)ip->i_no_addr,
fa75cedc SW	266	IF2DT(ip->i_inode.i_mode), ip->i_flags,
	267	(unsigned int)ip->i_diskflags,
	268	(unsigned long long)ip->i_inode.i_size,
	269	(unsigned long long)ip->i_disksize);
6802e340 SW	270	return 0;
	271	}
	272
b3b94faa DT	273	/**
	274	* rgrp_go_demote_ok - Check to see if it's ok to unlock a RG's glock
	275	* @gl: the glock
	276	*
	277	* Returns: 1 if it's ok
	278	*/
	279
97cc1025	280	static int rgrp_go_demote_ok(const struct gfs2_glock *gl)
b3b94faa DT	281	{
	282	return !gl->gl_aspace->i_mapping->nrpages;
	283	}
	284
	285	/**
	286	* rgrp_go_lock - operation done after an rgrp lock is locked by
	287	* a first holder on this node.
	288	* @gl: the glock
	289	* @flags:
	290	*
	291	* Returns: errno
	292	*/
	293
	294	static int rgrp_go_lock(struct gfs2_holder *gh)
	295	{
5c676f6d	296	return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
b3b94faa DT	297	}
	298
	299	/**
	300	* rgrp_go_unlock - operation done before an rgrp lock is unlocked by
	301	* a last holder on this node.
	302	* @gl: the glock
	303	* @flags:
	304	*
	305	*/
	306
	307	static void rgrp_go_unlock(struct gfs2_holder *gh)
	308	{
5c676f6d	309	gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
b3b94faa DT	310	}
b3b94faa DT	311
6802e340 SW	312	/**
	313	* rgrp_go_dump - print out an rgrp
	314	* @seq: The iterator
	315	* @gl: The glock in question
	316	*
	317	*/
	318
	319	static int rgrp_go_dump(struct seq_file seq, const struct gfs2_glock gl)
	320	{
	321	const struct gfs2_rgrpd *rgd = gl->gl_object;
	322	if (rgd == NULL)
	323	return 0;
fa75cedc SW	324	gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n",
	325	(unsigned long long)rgd->rd_addr, rgd->rd_flags,
	326	rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes);
6802e340 SW	327	return 0;
	328	}
	329
b3b94faa	330	/**
3042a2cc	331	* trans_go_sync - promote/demote the transaction glock
b3b94faa DT	332	* @gl: the glock
	333	* @state: the requested state
	334	* @flags:
	335	*
	336	*/
	337
3042a2cc	338	static void trans_go_sync(struct gfs2_glock *gl)
b3b94faa DT	339	{
	340	struct gfs2_sbd *sdp = gl->gl_sbd;
	341
	342	if (gl->gl_state != LM_ST_UNLOCKED &&
	343	test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
	344	gfs2_meta_syncfs(sdp);
	345	gfs2_log_shutdown(sdp);
	346	}
b3b94faa DT	347	}
	348
	349	/**
	350	* trans_go_xmote_bh - After promoting/demoting the transaction glock
	351	* @gl: the glock
	352	*
	353	*/
	354
6802e340	355	static int trans_go_xmote_bh(struct gfs2_glock gl, struct gfs2_holder gh)
b3b94faa DT	356	{
b3b94faa DT	357	struct gfs2_sbd *sdp = gl->gl_sbd;
feaa7bba	358	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
5c676f6d	359	struct gfs2_glock *j_gl = ip->i_gl;
55167622	360	struct gfs2_log_header_host head;
b3b94faa DT	361	int error;
b3b94faa DT	362
6802e340	363	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
1a14d3a6	364	j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
b3b94faa DT	365
	366	error = gfs2_find_jhead(sdp->sd_jdesc, &head);
	367	if (error)
	368	gfs2_consist(sdp);
	369	if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
	370	gfs2_consist(sdp);
	371
	372	/* Initialize some head of the log stuff */
	373	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
	374	sdp->sd_log_sequence = head.lh_sequence + 1;
	375	gfs2_log_pointers_init(sdp, head.lh_blkno);
	376	}
	377	}
6802e340	378	return 0;
b3b94faa DT	379	}
b3b94faa DT	380
97cc1025 SW	381	/**
	382	* trans_go_demote_ok
	383	* @gl: the glock
	384	*
	385	* Always returns 0
	386	*/
	387
	388	static int trans_go_demote_ok(const struct gfs2_glock *gl)
	389	{
	390	return 0;
	391	}
	392
b3b94faa DT	393	/**
	394	* quota_go_demote_ok - Check to see if it's ok to unlock a quota glock
	395	* @gl: the glock
	396	*
	397	* Returns: 1 if it's ok
	398	*/
	399
97cc1025	400	static int quota_go_demote_ok(const struct gfs2_glock *gl)
b3b94faa DT	401	{
	402	return !atomic_read(&gl->gl_lvb_count);
	403	}
	404
8fb4b536	405	const struct gfs2_glock_operations gfs2_meta_glops = {
b5d32bea	406	.go_xmote_th = meta_go_sync,
ea67eedb	407	.go_type = LM_TYPE_META,
b3b94faa DT	408	};
b3b94faa DT	409
8fb4b536	410	const struct gfs2_glock_operations gfs2_inode_glops = {
3042a2cc	411	.go_xmote_th = inode_go_sync,
b3b94faa DT	412	.go_inval = inode_go_inval,
	413	.go_demote_ok = inode_go_demote_ok,
	414	.go_lock = inode_go_lock,
6802e340	415	.go_dump = inode_go_dump,
ea67eedb	416	.go_type = LM_TYPE_INODE,
6802e340	417	.go_min_hold_time = HZ / 5,
b3b94faa DT	418	};
b3b94faa DT	419
8fb4b536	420	const struct gfs2_glock_operations gfs2_rgrp_glops = {
cad5b939	421	.go_xmote_th = meta_go_sync,
b3b94faa DT	422	.go_inval = meta_go_inval,
	423	.go_demote_ok = rgrp_go_demote_ok,
	424	.go_lock = rgrp_go_lock,
	425	.go_unlock = rgrp_go_unlock,
6802e340	426	.go_dump = rgrp_go_dump,
ea67eedb	427	.go_type = LM_TYPE_RGRP,
6802e340	428	.go_min_hold_time = HZ / 5,
b3b94faa DT	429	};
b3b94faa DT	430
8fb4b536	431	const struct gfs2_glock_operations gfs2_trans_glops = {
3042a2cc	432	.go_xmote_th = trans_go_sync,
b3b94faa	433	.go_xmote_bh = trans_go_xmote_bh,
97cc1025	434	.go_demote_ok = trans_go_demote_ok,
ea67eedb	435	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	436	};
b3b94faa DT	437
8fb4b536	438	const struct gfs2_glock_operations gfs2_iopen_glops = {
ea67eedb	439	.go_type = LM_TYPE_IOPEN,
b3b94faa DT	440	};
b3b94faa DT	441
8fb4b536	442	const struct gfs2_glock_operations gfs2_flock_glops = {
ea67eedb	443	.go_type = LM_TYPE_FLOCK,
b3b94faa DT	444	};
b3b94faa DT	445
8fb4b536	446	const struct gfs2_glock_operations gfs2_nondisk_glops = {
ea67eedb	447	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	448	};
b3b94faa DT	449
8fb4b536	450	const struct gfs2_glock_operations gfs2_quota_glops = {
b3b94faa	451	.go_demote_ok = quota_go_demote_ok,
ea67eedb	452	.go_type = LM_TYPE_QUOTA,
b3b94faa DT	453	};
b3b94faa DT	454
8fb4b536	455	const struct gfs2_glock_operations gfs2_journal_glops = {
ea67eedb	456	.go_type = LM_TYPE_JOURNAL,
b3b94faa DT	457	};
b3b94faa DT	458