[people/ms/linux.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/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;
	struct list_head *head = &gl->gl_ail_list;
	struct gfs2_bufdata *bd;
	struct buffer_head *bh;
	struct gfs2_trans tr;

	memset(&tr, 0, sizeof(tr));
	tr.tr_revokes = atomic_read(&gl->gl_ail_count);

	if (!tr.tr_revokes)
		return;

	/* A shortened, inline version of gfs2_trans_begin() */
	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
	tr.tr_ip = (unsigned long)__builtin_return_address(0);
	INIT_LIST_HEAD(&tr.tr_list_buf);
	gfs2_log_reserve(sdp, tr.tr_reserved);
	BUG_ON(current->journal_info);
	current->journal_info = &tr;

	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);
}

/**
 * rgrp_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 rgrp_go_sync(struct gfs2_glock *gl)
{
	struct address_space *metamapping = gl->gl_aspace->i_mapping;
	int error;

	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
		return;
	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);

	gfs2_log_flush(gl->gl_sbd, gl);
	filemap_fdatawrite(metamapping);
	error = filemap_fdatawait(metamapping);
        mapping_set_error(metamapping, error);
	gfs2_ail_empty_gl(gl);
}

/**
 * rgrp_go_inval - invalidate the metadata for this glock
 * @gl: the glock
 * @flags:
 *
 * We never used LM_ST_DEFERRED with resource groups, so that we
 * should always see the metadata flag set here.
 *
 */

static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
{
	struct address_space *mapping = gl->gl_aspace->i_mapping;

	BUG_ON(!(flags & DIO_METADATA));
	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	truncate_inode_pages(mapping, 0);

	if (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 (ip && !S_ISREG(ip->i_inode.i_mode))
		ip = NULL;
	if (ip && test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
		unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
		return;

	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);

	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);
	gfs2_ail_empty_gl(gl);
	/*
	 * Writeback of the data mapping may cause the dirty flag to be set
	 * so we have to clear it again here.
	 */
	smp_mb__before_clear_bit();
	clear_bit(GLF_DIRTY, &gl->gl_flags);
}

/**
 * inode_go_inval - prepare a inode glock to be released
 * @gl: the glock
 * @flags:
 * 
 * Normally we invlidate everything, but if we are moving into
 * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
 * can keep hold of the metadata, since it won't have changed.
 *
 */

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

	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));

	if (flags & DIO_METADATA) {
		struct address_space *mapping = gl->gl_aspace->i_mapping;
		truncate_inode_pages(mapping, 0);
		if (ip)
			set_bit(GIF_INVALID, &ip->i_flags);
	}

	if (ip == GFS2_I(gl->gl_sbd->sd_rindex))
		gl->gl_sbd->sd_rindex_uptodate = 0;
	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);
}

/**
 * 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)) {
		flush_workqueue(gfs2_delete_workqueue);
		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;
}

/**
 * iopen_go_callback - schedule the dcache entry for the inode to be deleted
 * @gl: the glock
 *
 * gl_spin lock is held while calling this
 */
static void iopen_go_callback(struct gfs2_glock *gl)
{
	struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object;

	if (gl->gl_demote_state == LM_ST_UNLOCKED &&
	    gl->gl_state == LM_ST_SHARED &&
	    ip && test_bit(GIF_USER, &ip->i_flags)) {
		gfs2_glock_hold(gl);
		if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
			gfs2_glock_put_nolock(gl);
	}
}

const struct gfs2_glock_operations gfs2_meta_glops = {
	.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 = rgrp_go_sync,
	.go_inval = rgrp_go_inval,
	.go_demote_ok = rgrp_go_demote_ok,
	.go_lock = rgrp_go_lock,
	.go_unlock = rgrp_go_unlock,
	.go_dump = gfs2_rgrp_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,
	.go_callback = iopen_go_callback,
};

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_type = LM_TYPE_QUOTA,
};

const struct gfs2_glock_operations gfs2_journal_glops = {
	.go_type = LM_TYPE_JOURNAL,
};

const struct gfs2_glock_operations *gfs2_glops_list[] = {
	[LM_TYPE_META] = &gfs2_meta_glops,
	[LM_TYPE_INODE] = &gfs2_inode_glops,
	[LM_TYPE_RGRP] = &gfs2_rgrp_glops,
	[LM_TYPE_NONDISK] = &gfs2_trans_glops,
	[LM_TYPE_IOPEN] = &gfs2_iopen_glops,
	[LM_TYPE_FLOCK] = &gfs2_flock_glops,
	[LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
	[LM_TYPE_QUOTA] = &gfs2_quota_glops,
	[LM_TYPE_JOURNAL] = &gfs2_journal_glops,
};
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>
6802e340	15	#include <linux/bio.h>
b3b94faa DT	16
b3b94faa DT	17	#include "gfs2.h"
5c676f6d	18	#include "incore.h"
b3b94faa DT	19	#include "bmap.h"
	20	#include "glock.h"
	21	#include "glops.h"
	22	#include "inode.h"
	23	#include "log.h"
	24	#include "meta_io.h"
b3b94faa DT	25	#include "recovery.h"
b3b94faa DT	26	#include "rgrp.h"
5c676f6d	27	#include "util.h"
ddacfaf7	28	#include "trans.h"
b3b94faa	29
ddacfaf7 SW	30	/**
	31	* ail_empty_gl - remove all buffers for a given lock from the AIL
	32	* @gl: the glock
	33	*
	34	* None of the buffers should be dirty, locked, or pinned.
	35	*/
	36
	37	static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
	38	{
	39	struct gfs2_sbd *sdp = gl->gl_sbd;
ddacfaf7 SW	40	struct list_head *head = &gl->gl_ail_list;
	41	struct gfs2_bufdata *bd;
	42	struct buffer_head *bh;
d8348de0	43	struct gfs2_trans tr;
ddacfaf7	44
d8348de0 SW	45	memset(&tr, 0, sizeof(tr));
d8348de0 SW	46	tr.tr_revokes = atomic_read(&gl->gl_ail_count);
ddacfaf7	47
d8348de0	48	if (!tr.tr_revokes)
ddacfaf7 SW	49	return;
ddacfaf7 SW	50
d8348de0 SW	51	/* A shortened, inline version of gfs2_trans_begin() */
	52	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
	53	tr.tr_ip = (unsigned long)__builtin_return_address(0);
	54	INIT_LIST_HEAD(&tr.tr_list_buf);
	55	gfs2_log_reserve(sdp, tr.tr_reserved);
	56	BUG_ON(current->journal_info);
	57	current->journal_info = &tr;
	58
ddacfaf7 SW	59	gfs2_log_lock(sdp);
	60	while (!list_empty(head)) {
	61	bd = list_entry(head->next, struct gfs2_bufdata,
	62	bd_ail_gl_list);
	63	bh = bd->bd_bh;
f91a0d3e	64	gfs2_remove_from_ail(bd);
1ad38c43 SW	65	bd->bd_bh = NULL;
	66	bh->b_private = NULL;
	67	bd->bd_blkno = bh->b_blocknr;
	68	gfs2_assert_withdraw(sdp, !buffer_busy(bh));
	69	gfs2_trans_add_revoke(sdp, bd);
ddacfaf7 SW	70	}
	71	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
	72	gfs2_log_unlock(sdp);
	73
	74	gfs2_trans_end(sdp);
	75	gfs2_log_flush(sdp, NULL);
	76	}
ba7f7290 SW	77
ba7f7290 SW	78	/**
6bac243f	79	* rgrp_go_sync - sync out the metadata for this glock
b3b94faa	80	* @gl: the glock
b3b94faa DT	81	*
	82	* Called when demoting or unlocking an EX glock. We must flush
	83	* to disk all dirty buffers/pages relating to this glock, and must not
	84	* not return to caller to demote/unlock the glock until I/O is complete.
	85	*/
	86
6bac243f	87	static void rgrp_go_sync(struct gfs2_glock *gl)
b3b94faa	88	{
6bac243f SW	89	struct address_space *metamapping = gl->gl_aspace->i_mapping;
	90	int error;
	91
	92	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
b5d32bea	93	return;
6bac243f	94	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
b5d32bea	95
6bac243f SW	96	gfs2_log_flush(gl->gl_sbd, gl);
	97	filemap_fdatawrite(metamapping);
	98	error = filemap_fdatawait(metamapping);
	99	mapping_set_error(metamapping, error);
	100	gfs2_ail_empty_gl(gl);
b3b94faa DT	101	}
	102
	103	/**
6bac243f	104	* rgrp_go_inval - invalidate the metadata for this glock
b3b94faa DT	105	* @gl: the glock
	106	* @flags:
	107	*
6bac243f SW	108	* We never used LM_ST_DEFERRED with resource groups, so that we
	109	* should always see the metadata flag set here.
	110	*
b3b94faa DT	111	*/
b3b94faa DT	112
6bac243f	113	static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
b3b94faa	114	{
6bac243f	115	struct address_space *mapping = gl->gl_aspace->i_mapping;
b3b94faa	116
6bac243f SW	117	BUG_ON(!(flags & DIO_METADATA));
	118	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	119	truncate_inode_pages(mapping, 0);
cf45b752	120
6bac243f SW	121	if (gl->gl_object) {
6bac243f SW	122	struct gfs2_rgrpd rgd = (struct gfs2_rgrpd )gl->gl_object;
cf45b752 BP	123	rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
cf45b752 BP	124	}
b3b94faa DT	125	}
b3b94faa DT	126
b5d32bea SW	127	/**
	128	* inode_go_sync - Sync the dirty data and/or metadata for an inode glock
	129	* @gl: the glock protecting the inode
	130	*
	131	*/
	132
	133	static void inode_go_sync(struct gfs2_glock *gl)
	134	{
	135	struct gfs2_inode *ip = gl->gl_object;
3042a2cc SW	136	struct address_space *metamapping = gl->gl_aspace->i_mapping;
	137	int error;
	138
b5d32bea SW	139	if (ip && !S_ISREG(ip->i_inode.i_mode))
b5d32bea SW	140	ip = NULL;
6bac243f SW	141	if (ip && test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
	142	unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
	143	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
	144	return;
b5d32bea	145
6bac243f SW	146	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
	147
	148	gfs2_log_flush(gl->gl_sbd, gl);
	149	filemap_fdatawrite(metamapping);
	150	if (ip) {
	151	struct address_space *mapping = ip->i_inode.i_mapping;
	152	filemap_fdatawrite(mapping);
	153	error = filemap_fdatawait(mapping);
	154	mapping_set_error(mapping, error);
b5d32bea	155	}
6bac243f SW	156	error = filemap_fdatawait(metamapping);
	157	mapping_set_error(metamapping, error);
	158	gfs2_ail_empty_gl(gl);
52fcd11c SW	159	/*
	160	* Writeback of the data mapping may cause the dirty flag to be set
	161	* so we have to clear it again here.
	162	*/
	163	smp_mb__before_clear_bit();
	164	clear_bit(GLF_DIRTY, &gl->gl_flags);
b5d32bea SW	165	}
b5d32bea SW	166
b3b94faa DT	167	/**
	168	* inode_go_inval - prepare a inode glock to be released
	169	* @gl: the glock
	170	* @flags:
6bac243f SW	171	*
	172	* Normally we invlidate everything, but if we are moving into
	173	* LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
	174	* can keep hold of the metadata, since it won't have changed.
b3b94faa DT	175	*
	176	*/
	177
	178	static void inode_go_inval(struct gfs2_glock *gl, int flags)
	179	{
b004157a	180	struct gfs2_inode *ip = gl->gl_object;
b3b94faa	181
6bac243f SW	182	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	183
	184	if (flags & DIO_METADATA) {
	185	struct address_space *mapping = gl->gl_aspace->i_mapping;
	186	truncate_inode_pages(mapping, 0);
b004157a SW	187	if (ip)
	188	set_bit(GIF_INVALID, &ip->i_flags);
	189	}
	190
6bac243f SW	191	if (ip == GFS2_I(gl->gl_sbd->sd_rindex))
6bac243f SW	192	gl->gl_sbd->sd_rindex_uptodate = 0;
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	}
	311
	312	/**
3042a2cc	313	* trans_go_sync - promote/demote the transaction glock
b3b94faa DT	314	* @gl: the glock
	315	* @state: the requested state
	316	* @flags:
	317	*
	318	*/
	319
3042a2cc	320	static void trans_go_sync(struct gfs2_glock *gl)
b3b94faa DT	321	{
	322	struct gfs2_sbd *sdp = gl->gl_sbd;
	323
	324	if (gl->gl_state != LM_ST_UNLOCKED &&
	325	test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
b94a170e	326	flush_workqueue(gfs2_delete_workqueue);
b3b94faa DT	327	gfs2_meta_syncfs(sdp);
	328	gfs2_log_shutdown(sdp);
	329	}
b3b94faa DT	330	}
	331
	332	/**
	333	* trans_go_xmote_bh - After promoting/demoting the transaction glock
	334	* @gl: the glock
	335	*
	336	*/
	337
6802e340	338	static int trans_go_xmote_bh(struct gfs2_glock gl, struct gfs2_holder gh)
b3b94faa DT	339	{
b3b94faa DT	340	struct gfs2_sbd *sdp = gl->gl_sbd;
feaa7bba	341	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
5c676f6d	342	struct gfs2_glock *j_gl = ip->i_gl;
55167622	343	struct gfs2_log_header_host head;
b3b94faa DT	344	int error;
b3b94faa DT	345
6802e340	346	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
1a14d3a6	347	j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
b3b94faa DT	348
	349	error = gfs2_find_jhead(sdp->sd_jdesc, &head);
	350	if (error)
	351	gfs2_consist(sdp);
	352	if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
	353	gfs2_consist(sdp);
	354
	355	/* Initialize some head of the log stuff */
	356	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
	357	sdp->sd_log_sequence = head.lh_sequence + 1;
	358	gfs2_log_pointers_init(sdp, head.lh_blkno);
	359	}
	360	}
6802e340	361	return 0;
b3b94faa DT	362	}
b3b94faa DT	363
97cc1025 SW	364	/**
	365	* trans_go_demote_ok
	366	* @gl: the glock
	367	*
	368	* Always returns 0
	369	*/
	370
	371	static int trans_go_demote_ok(const struct gfs2_glock *gl)
	372	{
	373	return 0;
	374	}
	375
b94a170e BM	376	/**
	377	* iopen_go_callback - schedule the dcache entry for the inode to be deleted
	378	* @gl: the glock
	379	*
	380	* gl_spin lock is held while calling this
	381	*/
	382	static void iopen_go_callback(struct gfs2_glock *gl)
	383	{
	384	struct gfs2_inode ip = (struct gfs2_inode )gl->gl_object;
	385
	386	if (gl->gl_demote_state == LM_ST_UNLOCKED &&
	387	gl->gl_state == LM_ST_SHARED &&
	388	ip && test_bit(GIF_USER, &ip->i_flags)) {
	389	gfs2_glock_hold(gl);
	390	if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
	391	gfs2_glock_put_nolock(gl);
	392	}
	393	}
	394
8fb4b536	395	const struct gfs2_glock_operations gfs2_meta_glops = {
ea67eedb	396	.go_type = LM_TYPE_META,
b3b94faa DT	397	};
b3b94faa DT	398
8fb4b536	399	const struct gfs2_glock_operations gfs2_inode_glops = {
3042a2cc	400	.go_xmote_th = inode_go_sync,
b3b94faa DT	401	.go_inval = inode_go_inval,
	402	.go_demote_ok = inode_go_demote_ok,
	403	.go_lock = inode_go_lock,
6802e340	404	.go_dump = inode_go_dump,
ea67eedb	405	.go_type = LM_TYPE_INODE,
6802e340	406	.go_min_hold_time = HZ / 5,
b3b94faa DT	407	};
b3b94faa DT	408
8fb4b536	409	const struct gfs2_glock_operations gfs2_rgrp_glops = {
6bac243f SW	410	.go_xmote_th = rgrp_go_sync,
6bac243f SW	411	.go_inval = rgrp_go_inval,
b3b94faa DT	412	.go_demote_ok = rgrp_go_demote_ok,
	413	.go_lock = rgrp_go_lock,
	414	.go_unlock = rgrp_go_unlock,
09010978	415	.go_dump = gfs2_rgrp_dump,
ea67eedb	416	.go_type = LM_TYPE_RGRP,
6802e340	417	.go_min_hold_time = HZ / 5,
b3b94faa DT	418	};
b3b94faa DT	419
8fb4b536	420	const struct gfs2_glock_operations gfs2_trans_glops = {
3042a2cc	421	.go_xmote_th = trans_go_sync,
b3b94faa	422	.go_xmote_bh = trans_go_xmote_bh,
97cc1025	423	.go_demote_ok = trans_go_demote_ok,
ea67eedb	424	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	425	};
b3b94faa DT	426
8fb4b536	427	const struct gfs2_glock_operations gfs2_iopen_glops = {
ea67eedb	428	.go_type = LM_TYPE_IOPEN,
b94a170e	429	.go_callback = iopen_go_callback,
b3b94faa DT	430	};
b3b94faa DT	431
8fb4b536	432	const struct gfs2_glock_operations gfs2_flock_glops = {
ea67eedb	433	.go_type = LM_TYPE_FLOCK,
b3b94faa DT	434	};
b3b94faa DT	435
8fb4b536	436	const struct gfs2_glock_operations gfs2_nondisk_glops = {
ea67eedb	437	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	438	};
b3b94faa DT	439
8fb4b536	440	const struct gfs2_glock_operations gfs2_quota_glops = {
ea67eedb	441	.go_type = LM_TYPE_QUOTA,
b3b94faa DT	442	};
b3b94faa DT	443
8fb4b536	444	const struct gfs2_glock_operations gfs2_journal_glops = {
ea67eedb	445	.go_type = LM_TYPE_JOURNAL,
b3b94faa DT	446	};
b3b94faa DT	447
64d576ba SW	448	const struct gfs2_glock_operations *gfs2_glops_list[] = {
	449	[LM_TYPE_META] = &gfs2_meta_glops,
	450	[LM_TYPE_INODE] = &gfs2_inode_glops,
	451	[LM_TYPE_RGRP] = &gfs2_rgrp_glops,
	452	[LM_TYPE_NONDISK] = &gfs2_trans_glops,
	453	[LM_TYPE_IOPEN] = &gfs2_iopen_glops,
	454	[LM_TYPE_FLOCK] = &gfs2_flock_glops,
	455	[LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
	456	[LM_TYPE_QUOTA] = &gfs2_quota_glops,
	457	[LM_TYPE_JOURNAL] = &gfs2_journal_glops,
	458	};
	459