[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/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
#include <linux/gfs2_ondisk.h>
#include <linux/bio.h>
#include <linux/posix_acl.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"
#include "dir.h"

static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh)
{
	fs_err(gl->gl_sbd, "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page state 0x%lx\n",
	       bh, (unsigned long long)bh->b_blocknr, bh->b_state,
	       bh->b_page->mapping, bh->b_page->flags);
	fs_err(gl->gl_sbd, "AIL glock %u:%llu mapping %p\n",
	       gl->gl_name.ln_type, gl->gl_name.ln_number,
	       gfs2_glock2aspace(gl));
	gfs2_lm_withdraw(gl->gl_sbd, "AIL error\n");
}

/**
 * __gfs2_ail_flush - remove all buffers for a given lock from the AIL
 * @gl: the glock
 * @fsync: set when called from fsync (not all buffers will be clean)
 *
 * None of the buffers should be dirty, locked, or pinned.
 */

static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct list_head *head = &gl->gl_ail_list;
	struct gfs2_bufdata *bd, *tmp;
	struct buffer_head *bh;
	const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock);
	sector_t blocknr;

	gfs2_log_lock(sdp);
	spin_lock(&sdp->sd_ail_lock);
	list_for_each_entry_safe(bd, tmp, head, bd_ail_gl_list) {
		bh = bd->bd_bh;
		if (bh->b_state & b_state) {
			if (fsync)
				continue;
			gfs2_ail_error(gl, bh);
		}
		blocknr = bh->b_blocknr;
		bh->b_private = NULL;
		gfs2_remove_from_ail(bd); /* drops ref on bh */

		bd->bd_bh = NULL;
		bd->bd_blkno = blocknr;

		gfs2_trans_add_revoke(sdp, bd);
	}
	BUG_ON(!fsync && atomic_read(&gl->gl_ail_count));
	spin_unlock(&sdp->sd_ail_lock);
	gfs2_log_unlock(sdp);
}


static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	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);
	gfs2_log_reserve(sdp, tr.tr_reserved);
	BUG_ON(current->journal_info);
	current->journal_info = &tr;

	__gfs2_ail_flush(gl, 0);

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

void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	unsigned int revokes = atomic_read(&gl->gl_ail_count);
	int ret;

	if (!revokes)
		return;

	ret = gfs2_trans_begin(sdp, 0, revokes);
	if (ret)
		return;
	__gfs2_ail_flush(gl, fsync);
	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 = gfs2_glock2aspace(gl);
	struct gfs2_rgrpd *rgd;
	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);

	spin_lock(&gl->gl_spin);
	rgd = gl->gl_object;
	if (rgd)
		gfs2_free_clones(rgd);
	spin_unlock(&gl->gl_spin);
}

/**
 * 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 = gfs2_glock2aspace(gl);

	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 = gfs2_glock2aspace(gl);
	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 = gfs2_glock2aspace(gl);
		truncate_inode_pages(mapping, 0);
		if (ip) {
			set_bit(GIF_INVALID, &ip->i_flags);
			forget_all_cached_acls(&ip->i_inode);
			gfs2_dir_hash_inval(ip);
		}
	}

	if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
		gfs2_log_flush(gl->gl_sbd, NULL);
		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;
	struct gfs2_holder *gh;

	if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object)
		return 0;

	if (!list_empty(&gl->gl_holders)) {
		gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
		if (gh->gh_list.next != &gl->gl_holders)
			return 0;
	}

	return 1;
}

/**
 * gfs2_set_nlink - Set the inode's link count based on on-disk info
 * @inode: The inode in question
 * @nlink: The link count
 *
 * If the link count has hit zero, it must never be raised, whatever the
 * on-disk inode might say. When new struct inodes are created the link
 * count is set to 1, so that we can safely use this test even when reading
 * in on disk information for the first time.
 */

static void gfs2_set_nlink(struct inode *inode, u32 nlink)
{
	/*
	 * We will need to review setting the nlink count here in the
	 * light of the forthcoming ro bind mount work. This is a reminder
	 * to do that.
	 */
	if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
		if (nlink == 0)
			clear_nlink(inode);
		else
			set_nlink(inode, nlink);
	}
}

static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
{
	const struct gfs2_dinode *str = buf;
	struct timespec atime;
	u16 height, depth;

	if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
		goto corrupt;
	ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
	ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
	ip->i_inode.i_rdev = 0;
	switch (ip->i_inode.i_mode & S_IFMT) {
	case S_IFBLK:
	case S_IFCHR:
		ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
					   be32_to_cpu(str->di_minor));
		break;
	};

	ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
	ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
	gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
	i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
	gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
	atime.tv_sec = be64_to_cpu(str->di_atime);
	atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
	if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
		ip->i_inode.i_atime = atime;
	ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
	ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
	ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
	ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);

	ip->i_goal = be64_to_cpu(str->di_goal_meta);
	ip->i_generation = be64_to_cpu(str->di_generation);

	ip->i_diskflags = be32_to_cpu(str->di_flags);
	ip->i_eattr = be64_to_cpu(str->di_eattr);
	/* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
	gfs2_set_inode_flags(&ip->i_inode);
	height = be16_to_cpu(str->di_height);
	if (unlikely(height > GFS2_MAX_META_HEIGHT))
		goto corrupt;
	ip->i_height = (u8)height;

	depth = be16_to_cpu(str->di_depth);
	if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
		goto corrupt;
	ip->i_depth = (u8)depth;
	ip->i_entries = be32_to_cpu(str->di_entries);

	if (S_ISREG(ip->i_inode.i_mode))
		gfs2_set_aops(&ip->i_inode);

	return 0;
corrupt:
	gfs2_consist_inode(ip);
	return -EIO;
}

/**
 * gfs2_inode_refresh - Refresh the incore copy of the dinode
 * @ip: The GFS2 inode
 *
 * Returns: errno
 */

int gfs2_inode_refresh(struct gfs2_inode *ip)
{
	struct buffer_head *dibh;
	int error;

	error = gfs2_meta_inode_buffer(ip, &dibh);
	if (error)
		return error;

	error = gfs2_dinode_in(ip, dibh->b_data);
	brelse(dibh);
	clear_bit(GIF_INVALID, &ip->i_flags);

	return error;
}

/**
 * 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\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)i_size_read(&ip->i_inode));
	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;
}

/**
 * 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;
	struct gfs2_sbd *sdp = gl->gl_sbd;

	if (sdp->sd_vfs->s_flags & MS_RDONLY)
		return;

	if (gl->gl_demote_state == LM_ST_UNLOCKED &&
	    gl->gl_state == LM_ST_SHARED && ip) {
		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_flags = GLOF_ASPACE,
};

const struct gfs2_glock_operations gfs2_rgrp_glops = {
	.go_xmote_th = rgrp_go_sync,
	.go_inval = rgrp_go_inval,
	.go_lock = gfs2_rgrp_go_lock,
	.go_unlock = gfs2_rgrp_go_unlock,
	.go_dump = gfs2_rgrp_dump,
	.go_type = LM_TYPE_RGRP,
	.go_flags = GLOF_ASPACE,
};

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_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/spinlock.h>
	11	#include <linux/completion.h>
	12	#include <linux/buffer_head.h>
5c676f6d	13	#include <linux/gfs2_ondisk.h>
6802e340	14	#include <linux/bio.h>
c65f7fb5	15	#include <linux/posix_acl.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"
17d539f0	29	#include "dir.h"
b3b94faa	30
75549186 SW	31	static void gfs2_ail_error(struct gfs2_glock gl, const struct buffer_head bh)
	32	{
	33	fs_err(gl->gl_sbd, "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page state 0x%lx\n",
	34	bh, (unsigned long long)bh->b_blocknr, bh->b_state,
	35	bh->b_page->mapping, bh->b_page->flags);
	36	fs_err(gl->gl_sbd, "AIL glock %u:%llu mapping %p\n",
	37	gl->gl_name.ln_type, gl->gl_name.ln_number,
	38	gfs2_glock2aspace(gl));
	39	gfs2_lm_withdraw(gl->gl_sbd, "AIL error\n");
	40	}
	41
ddacfaf7	42	/**
dba898b0	43	* __gfs2_ail_flush - remove all buffers for a given lock from the AIL
ddacfaf7	44	* @gl: the glock
b5b24d7a	45	* @fsync: set when called from fsync (not all buffers will be clean)
ddacfaf7 SW	46	*
	47	* None of the buffers should be dirty, locked, or pinned.
	48	*/
	49
b5b24d7a	50	static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
ddacfaf7 SW	51	{
ddacfaf7 SW	52	struct gfs2_sbd *sdp = gl->gl_sbd;
ddacfaf7	53	struct list_head *head = &gl->gl_ail_list;
b5b24d7a	54	struct gfs2_bufdata bd, tmp;
ddacfaf7	55	struct buffer_head *bh;
b5b24d7a	56	const unsigned long b_state = (1UL << BH_Dirty)\|(1UL << BH_Pinned)\|(1UL << BH_Lock);
75549186	57	sector_t blocknr;
d8348de0	58
b5b24d7a	59	gfs2_log_lock(sdp);
d6a079e8	60	spin_lock(&sdp->sd_ail_lock);
b5b24d7a	61	list_for_each_entry_safe(bd, tmp, head, bd_ail_gl_list) {
ddacfaf7	62	bh = bd->bd_bh;
b5b24d7a SW	63	if (bh->b_state & b_state) {
	64	if (fsync)
	65	continue;
75549186	66	gfs2_ail_error(gl, bh);
b5b24d7a SW	67	}
b5b24d7a SW	68	blocknr = bh->b_blocknr;
1ad38c43	69	bh->b_private = NULL;
75549186	70	gfs2_remove_from_ail(bd); /* drops ref on bh */
380f7c65	71
75549186 SW	72	bd->bd_bh = NULL;
	73	bd->bd_blkno = blocknr;
	74
1ad38c43	75	gfs2_trans_add_revoke(sdp, bd);
ddacfaf7	76	}
b5b24d7a	77	BUG_ON(!fsync && atomic_read(&gl->gl_ail_count));
d6a079e8	78	spin_unlock(&sdp->sd_ail_lock);
b5b24d7a	79	gfs2_log_unlock(sdp);
dba898b0 SW	80	}
	81
	82
	83	static void gfs2_ail_empty_gl(struct gfs2_glock *gl)
	84	{
	85	struct gfs2_sbd *sdp = gl->gl_sbd;
	86	struct gfs2_trans tr;
	87
	88	memset(&tr, 0, sizeof(tr));
	89	tr.tr_revokes = atomic_read(&gl->gl_ail_count);
	90
	91	if (!tr.tr_revokes)
	92	return;
	93
	94	/* A shortened, inline version of gfs2_trans_begin() */
	95	tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64));
	96	tr.tr_ip = (unsigned long)__builtin_return_address(0);
dba898b0 SW	97	gfs2_log_reserve(sdp, tr.tr_reserved);
	98	BUG_ON(current->journal_info);
	99	current->journal_info = &tr;
	100
b5b24d7a	101	__gfs2_ail_flush(gl, 0);
dba898b0 SW	102
	103	gfs2_trans_end(sdp);
	104	gfs2_log_flush(sdp, NULL);
	105	}
ddacfaf7	106
b5b24d7a	107	void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync)
dba898b0 SW	108	{
	109	struct gfs2_sbd *sdp = gl->gl_sbd;
	110	unsigned int revokes = atomic_read(&gl->gl_ail_count);
	111	int ret;
	112
	113	if (!revokes)
	114	return;
	115
	116	ret = gfs2_trans_begin(sdp, 0, revokes);
	117	if (ret)
	118	return;
b5b24d7a	119	__gfs2_ail_flush(gl, fsync);
ddacfaf7 SW	120	gfs2_trans_end(sdp);
	121	gfs2_log_flush(sdp, NULL);
	122	}
ba7f7290 SW	123
ba7f7290 SW	124	/**
6bac243f	125	* rgrp_go_sync - sync out the metadata for this glock
b3b94faa	126	* @gl: the glock
b3b94faa DT	127	*
	128	* Called when demoting or unlocking an EX glock. We must flush
	129	* to disk all dirty buffers/pages relating to this glock, and must not
	130	* not return to caller to demote/unlock the glock until I/O is complete.
	131	*/
	132
6bac243f	133	static void rgrp_go_sync(struct gfs2_glock *gl)
b3b94faa	134	{
009d8518	135	struct address_space *metamapping = gfs2_glock2aspace(gl);
8339ee54	136	struct gfs2_rgrpd *rgd;
6bac243f SW	137	int error;
	138
	139	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
b5d32bea	140	return;
6bac243f	141	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
b5d32bea	142
6bac243f SW	143	gfs2_log_flush(gl->gl_sbd, gl);
	144	filemap_fdatawrite(metamapping);
	145	error = filemap_fdatawait(metamapping);
	146	mapping_set_error(metamapping, error);
	147	gfs2_ail_empty_gl(gl);
7c9ca621	148
8339ee54 SW	149	spin_lock(&gl->gl_spin);
	150	rgd = gl->gl_object;
	151	if (rgd)
	152	gfs2_free_clones(rgd);
	153	spin_unlock(&gl->gl_spin);
b3b94faa DT	154	}
	155
	156	/**
6bac243f	157	* rgrp_go_inval - invalidate the metadata for this glock
b3b94faa DT	158	* @gl: the glock
	159	* @flags:
	160	*
6bac243f SW	161	* We never used LM_ST_DEFERRED with resource groups, so that we
	162	* should always see the metadata flag set here.
	163	*
b3b94faa DT	164	*/
b3b94faa DT	165
6bac243f	166	static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
b3b94faa	167	{
009d8518	168	struct address_space *mapping = gfs2_glock2aspace(gl);
b3b94faa	169
6bac243f SW	170	BUG_ON(!(flags & DIO_METADATA));
	171	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	172	truncate_inode_pages(mapping, 0);
cf45b752	173
6bac243f SW	174	if (gl->gl_object) {
6bac243f SW	175	struct gfs2_rgrpd rgd = (struct gfs2_rgrpd )gl->gl_object;
cf45b752 BP	176	rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
cf45b752 BP	177	}
b3b94faa DT	178	}
b3b94faa DT	179
b5d32bea SW	180	/**
	181	* inode_go_sync - Sync the dirty data and/or metadata for an inode glock
	182	* @gl: the glock protecting the inode
	183	*
	184	*/
	185
	186	static void inode_go_sync(struct gfs2_glock *gl)
	187	{
	188	struct gfs2_inode *ip = gl->gl_object;
009d8518	189	struct address_space *metamapping = gfs2_glock2aspace(gl);
3042a2cc SW	190	int error;
3042a2cc SW	191
b5d32bea SW	192	if (ip && !S_ISREG(ip->i_inode.i_mode))
b5d32bea SW	193	ip = NULL;
6bac243f SW	194	if (ip && test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
	195	unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
	196	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
	197	return;
b5d32bea	198
6bac243f SW	199	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
	200
	201	gfs2_log_flush(gl->gl_sbd, gl);
	202	filemap_fdatawrite(metamapping);
	203	if (ip) {
	204	struct address_space *mapping = ip->i_inode.i_mapping;
	205	filemap_fdatawrite(mapping);
	206	error = filemap_fdatawait(mapping);
	207	mapping_set_error(mapping, error);
b5d32bea	208	}
6bac243f SW	209	error = filemap_fdatawait(metamapping);
	210	mapping_set_error(metamapping, error);
	211	gfs2_ail_empty_gl(gl);
52fcd11c SW	212	/*
	213	* Writeback of the data mapping may cause the dirty flag to be set
	214	* so we have to clear it again here.
	215	*/
	216	smp_mb__before_clear_bit();
	217	clear_bit(GLF_DIRTY, &gl->gl_flags);
b5d32bea SW	218	}
b5d32bea SW	219
b3b94faa DT	220	/**
	221	* inode_go_inval - prepare a inode glock to be released
	222	* @gl: the glock
	223	* @flags:
6bac243f SW	224	*
	225	* Normally we invlidate everything, but if we are moving into
	226	* LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
	227	* can keep hold of the metadata, since it won't have changed.
b3b94faa DT	228	*
	229	*/
	230
	231	static void inode_go_inval(struct gfs2_glock *gl, int flags)
	232	{
b004157a	233	struct gfs2_inode *ip = gl->gl_object;
b3b94faa	234
6bac243f SW	235	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	236
	237	if (flags & DIO_METADATA) {
009d8518	238	struct address_space *mapping = gfs2_glock2aspace(gl);
6bac243f	239	truncate_inode_pages(mapping, 0);
c65f7fb5	240	if (ip) {
b004157a	241	set_bit(GIF_INVALID, &ip->i_flags);
c65f7fb5	242	forget_all_cached_acls(&ip->i_inode);
17d539f0	243	gfs2_dir_hash_inval(ip);
c65f7fb5	244	}
b004157a SW	245	}
b004157a SW	246
1ce53368 BM	247	if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
1ce53368 BM	248	gfs2_log_flush(gl->gl_sbd, NULL);
6bac243f	249	gl->gl_sbd->sd_rindex_uptodate = 0;
1ce53368	250	}
3cc3f710	251	if (ip && S_ISREG(ip->i_inode.i_mode))
b004157a	252	truncate_inode_pages(ip->i_inode.i_mapping, 0);
b3b94faa DT	253	}
	254
	255	/**
	256	* inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
	257	* @gl: the glock
	258	*
	259	* Returns: 1 if it's ok
	260	*/
	261
97cc1025	262	static int inode_go_demote_ok(const struct gfs2_glock *gl)
b3b94faa DT	263	{
b3b94faa DT	264	struct gfs2_sbd *sdp = gl->gl_sbd;
bc015cb8 SW	265	struct gfs2_holder *gh;
bc015cb8 SW	266
97cc1025 SW	267	if (sdp->sd_jindex == gl->gl_object \|\| sdp->sd_rindex == gl->gl_object)
97cc1025 SW	268	return 0;
bc015cb8 SW	269
	270	if (!list_empty(&gl->gl_holders)) {
	271	gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
	272	if (gh->gh_list.next != &gl->gl_holders)
	273	return 0;
	274	}
	275
97cc1025	276	return 1;
b3b94faa DT	277	}
b3b94faa DT	278
d4b2cf1b SW	279	/**
	280	* gfs2_set_nlink - Set the inode's link count based on on-disk info
	281	* @inode: The inode in question
	282	* @nlink: The link count
	283	*
	284	* If the link count has hit zero, it must never be raised, whatever the
	285	* on-disk inode might say. When new struct inodes are created the link
	286	* count is set to 1, so that we can safely use this test even when reading
	287	* in on disk information for the first time.
	288	*/
	289
	290	static void gfs2_set_nlink(struct inode *inode, u32 nlink)
	291	{
	292	/*
	293	* We will need to review setting the nlink count here in the
	294	* light of the forthcoming ro bind mount work. This is a reminder
	295	* to do that.
	296	*/
	297	if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
	298	if (nlink == 0)
	299	clear_nlink(inode);
	300	else
bfe86848	301	set_nlink(inode, nlink);
d4b2cf1b SW	302	}
	303	}
	304
	305	static int gfs2_dinode_in(struct gfs2_inode ip, const void buf)
	306	{
	307	const struct gfs2_dinode *str = buf;
	308	struct timespec atime;
	309	u16 height, depth;
	310
	311	if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
	312	goto corrupt;
	313	ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
	314	ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
	315	ip->i_inode.i_rdev = 0;
	316	switch (ip->i_inode.i_mode & S_IFMT) {
	317	case S_IFBLK:
	318	case S_IFCHR:
	319	ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
	320	be32_to_cpu(str->di_minor));
	321	break;
	322	};
	323
	324	ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
	325	ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
	326	gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
	327	i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
	328	gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
	329	atime.tv_sec = be64_to_cpu(str->di_atime);
	330	atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
	331	if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
	332	ip->i_inode.i_atime = atime;
	333	ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
	334	ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
	335	ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
	336	ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
	337
	338	ip->i_goal = be64_to_cpu(str->di_goal_meta);
	339	ip->i_generation = be64_to_cpu(str->di_generation);
	340
	341	ip->i_diskflags = be32_to_cpu(str->di_flags);
9964afbb SW	342	ip->i_eattr = be64_to_cpu(str->di_eattr);
9964afbb SW	343	/* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
d4b2cf1b SW	344	gfs2_set_inode_flags(&ip->i_inode);
	345	height = be16_to_cpu(str->di_height);
	346	if (unlikely(height > GFS2_MAX_META_HEIGHT))
	347	goto corrupt;
	348	ip->i_height = (u8)height;
	349
	350	depth = be16_to_cpu(str->di_depth);
	351	if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
	352	goto corrupt;
	353	ip->i_depth = (u8)depth;
	354	ip->i_entries = be32_to_cpu(str->di_entries);
	355
d4b2cf1b SW	356	if (S_ISREG(ip->i_inode.i_mode))
	357	gfs2_set_aops(&ip->i_inode);
	358
	359	return 0;
	360	corrupt:
	361	gfs2_consist_inode(ip);
	362	return -EIO;
	363	}
	364
	365	/**
	366	* gfs2_inode_refresh - Refresh the incore copy of the dinode
	367	* @ip: The GFS2 inode
	368	*
	369	* Returns: errno
	370	*/
	371
	372	int gfs2_inode_refresh(struct gfs2_inode *ip)
	373	{
	374	struct buffer_head *dibh;
	375	int error;
	376
	377	error = gfs2_meta_inode_buffer(ip, &dibh);
	378	if (error)
	379	return error;
	380
d4b2cf1b SW	381	error = gfs2_dinode_in(ip, dibh->b_data);
	382	brelse(dibh);
	383	clear_bit(GIF_INVALID, &ip->i_flags);
	384
	385	return error;
	386	}
	387
b3b94faa DT	388	/**
	389	* inode_go_lock - operation done after an inode lock is locked by a process
	390	* @gl: the glock
	391	* @flags:
	392	*
	393	* Returns: errno
	394	*/
	395
	396	static int inode_go_lock(struct gfs2_holder *gh)
	397	{
	398	struct gfs2_glock *gl = gh->gh_gl;
813e0c46	399	struct gfs2_sbd *sdp = gl->gl_sbd;
5c676f6d	400	struct gfs2_inode *ip = gl->gl_object;
b3b94faa DT	401	int error = 0;
b3b94faa DT	402
091806ed	403	if (!ip \|\| (gh->gh_flags & GL_SKIP))
b3b94faa DT	404	return 0;
b3b94faa DT	405
bfded27b	406	if (test_bit(GIF_INVALID, &ip->i_flags)) {
b3b94faa DT	407	error = gfs2_inode_refresh(ip);
	408	if (error)
	409	return error;
b3b94faa DT	410	}
b3b94faa DT	411
383f01fb	412	if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
b3b94faa	413	(gl->gl_state == LM_ST_EXCLUSIVE) &&
813e0c46 SW	414	(gh->gh_state == LM_ST_EXCLUSIVE)) {
	415	spin_lock(&sdp->sd_trunc_lock);
	416	if (list_empty(&ip->i_trunc_list))
	417	list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
	418	spin_unlock(&sdp->sd_trunc_lock);
	419	wake_up(&sdp->sd_quota_wait);
	420	return 1;
	421	}
b3b94faa DT	422
	423	return error;
	424	}
	425
6802e340 SW	426	/**
	427	* inode_go_dump - print information about an inode
	428	* @seq: The iterator
	429	* @ip: the inode
	430	*
	431	* Returns: 0 on success, -ENOBUFS when we run out of space
	432	*/
	433
	434	static int inode_go_dump(struct seq_file seq, const struct gfs2_glock gl)
	435	{
	436	const struct gfs2_inode *ip = gl->gl_object;
	437	if (ip == NULL)
	438	return 0;
a2e0f799	439	gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
6802e340 SW	440	(unsigned long long)ip->i_no_formal_ino,
6802e340 SW	441	(unsigned long long)ip->i_no_addr,
fa75cedc SW	442	IF2DT(ip->i_inode.i_mode), ip->i_flags,
fa75cedc SW	443	(unsigned int)ip->i_diskflags,
a2e0f799	444	(unsigned long long)i_size_read(&ip->i_inode));
6802e340 SW	445	return 0;
	446	}
	447
b3b94faa	448	/**
3042a2cc	449	* trans_go_sync - promote/demote the transaction glock
b3b94faa DT	450	* @gl: the glock
	451	* @state: the requested state
	452	* @flags:
	453	*
	454	*/
	455
3042a2cc	456	static void trans_go_sync(struct gfs2_glock *gl)
b3b94faa DT	457	{
	458	struct gfs2_sbd *sdp = gl->gl_sbd;
	459
	460	if (gl->gl_state != LM_ST_UNLOCKED &&
	461	test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
	462	gfs2_meta_syncfs(sdp);
	463	gfs2_log_shutdown(sdp);
	464	}
b3b94faa DT	465	}
	466
	467	/**
	468	* trans_go_xmote_bh - After promoting/demoting the transaction glock
	469	* @gl: the glock
	470	*
	471	*/
	472
6802e340	473	static int trans_go_xmote_bh(struct gfs2_glock gl, struct gfs2_holder gh)
b3b94faa DT	474	{
b3b94faa DT	475	struct gfs2_sbd *sdp = gl->gl_sbd;
feaa7bba	476	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
5c676f6d	477	struct gfs2_glock *j_gl = ip->i_gl;
55167622	478	struct gfs2_log_header_host head;
b3b94faa DT	479	int error;
b3b94faa DT	480
6802e340	481	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
1a14d3a6	482	j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
b3b94faa DT	483
	484	error = gfs2_find_jhead(sdp->sd_jdesc, &head);
	485	if (error)
	486	gfs2_consist(sdp);
	487	if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
	488	gfs2_consist(sdp);
	489
	490	/* Initialize some head of the log stuff */
	491	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
	492	sdp->sd_log_sequence = head.lh_sequence + 1;
	493	gfs2_log_pointers_init(sdp, head.lh_blkno);
	494	}
	495	}
6802e340	496	return 0;
b3b94faa DT	497	}
b3b94faa DT	498
97cc1025 SW	499	/**
	500	* trans_go_demote_ok
	501	* @gl: the glock
	502	*
	503	* Always returns 0
	504	*/
	505
	506	static int trans_go_demote_ok(const struct gfs2_glock *gl)
	507	{
	508	return 0;
	509	}
	510
b94a170e BM	511	/**
	512	* iopen_go_callback - schedule the dcache entry for the inode to be deleted
	513	* @gl: the glock
	514	*
	515	* gl_spin lock is held while calling this
	516	*/
	517	static void iopen_go_callback(struct gfs2_glock *gl)
	518	{
	519	struct gfs2_inode ip = (struct gfs2_inode )gl->gl_object;
001e8e8d SW	520	struct gfs2_sbd *sdp = gl->gl_sbd;
	521
	522	if (sdp->sd_vfs->s_flags & MS_RDONLY)
	523	return;
b94a170e BM	524
b94a170e BM	525	if (gl->gl_demote_state == LM_ST_UNLOCKED &&
009d8518	526	gl->gl_state == LM_ST_SHARED && ip) {
b94a170e BM	527	gfs2_glock_hold(gl);
	528	if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
	529	gfs2_glock_put_nolock(gl);
	530	}
	531	}
	532
8fb4b536	533	const struct gfs2_glock_operations gfs2_meta_glops = {
ea67eedb	534	.go_type = LM_TYPE_META,
b3b94faa DT	535	};
b3b94faa DT	536
8fb4b536	537	const struct gfs2_glock_operations gfs2_inode_glops = {
3042a2cc	538	.go_xmote_th = inode_go_sync,
b3b94faa DT	539	.go_inval = inode_go_inval,
	540	.go_demote_ok = inode_go_demote_ok,
	541	.go_lock = inode_go_lock,
6802e340	542	.go_dump = inode_go_dump,
ea67eedb	543	.go_type = LM_TYPE_INODE,
009d8518	544	.go_flags = GLOF_ASPACE,
b3b94faa DT	545	};
b3b94faa DT	546
8fb4b536	547	const struct gfs2_glock_operations gfs2_rgrp_glops = {
6bac243f SW	548	.go_xmote_th = rgrp_go_sync,
6bac243f SW	549	.go_inval = rgrp_go_inval,
7c9ca621 BP	550	.go_lock = gfs2_rgrp_go_lock,
7c9ca621 BP	551	.go_unlock = gfs2_rgrp_go_unlock,
09010978	552	.go_dump = gfs2_rgrp_dump,
ea67eedb	553	.go_type = LM_TYPE_RGRP,
009d8518	554	.go_flags = GLOF_ASPACE,
b3b94faa DT	555	};
b3b94faa DT	556
8fb4b536	557	const struct gfs2_glock_operations gfs2_trans_glops = {
3042a2cc	558	.go_xmote_th = trans_go_sync,
b3b94faa	559	.go_xmote_bh = trans_go_xmote_bh,
97cc1025	560	.go_demote_ok = trans_go_demote_ok,
ea67eedb	561	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	562	};
b3b94faa DT	563
8fb4b536	564	const struct gfs2_glock_operations gfs2_iopen_glops = {
ea67eedb	565	.go_type = LM_TYPE_IOPEN,
b94a170e	566	.go_callback = iopen_go_callback,
b3b94faa DT	567	};
b3b94faa DT	568
8fb4b536	569	const struct gfs2_glock_operations gfs2_flock_glops = {
ea67eedb	570	.go_type = LM_TYPE_FLOCK,
b3b94faa DT	571	};
b3b94faa DT	572
8fb4b536	573	const struct gfs2_glock_operations gfs2_nondisk_glops = {
ea67eedb	574	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	575	};
b3b94faa DT	576
8fb4b536	577	const struct gfs2_glock_operations gfs2_quota_glops = {
ea67eedb	578	.go_type = LM_TYPE_QUOTA,
b3b94faa DT	579	};
b3b94faa DT	580
8fb4b536	581	const struct gfs2_glock_operations gfs2_journal_glops = {
ea67eedb	582	.go_type = LM_TYPE_JOURNAL,
b3b94faa DT	583	};
b3b94faa DT	584
64d576ba SW	585	const struct gfs2_glock_operations *gfs2_glops_list[] = {
	586	[LM_TYPE_META] = &gfs2_meta_glops,
	587	[LM_TYPE_INODE] = &gfs2_inode_glops,
	588	[LM_TYPE_RGRP] = &gfs2_rgrp_glops,
64d576ba SW	589	[LM_TYPE_IOPEN] = &gfs2_iopen_glops,
	590	[LM_TYPE_FLOCK] = &gfs2_flock_glops,
	591	[LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
	592	[LM_TYPE_QUOTA] = &gfs2_quota_glops,
	593	[LM_TYPE_JOURNAL] = &gfs2_journal_glops,
	594	};
	595