[deliverable/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/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
 *
 * None of the buffers should be dirty, locked, or pinned.
 */

static void __gfs2_ail_flush(struct gfs2_glock *gl, unsigned long b_state)
{
	struct gfs2_sbd *sdp = gl->gl_sbd;
	struct list_head *head = &gl->gl_ail_list;
	struct gfs2_bufdata *bd;
	struct buffer_head *bh;
	sector_t blocknr;

	spin_lock(&sdp->sd_ail_lock);
	while (!list_empty(head)) {
		bd = list_entry(head->next, struct gfs2_bufdata,
				bd_ail_gl_list);
		bh = bd->bd_bh;
		blocknr = bh->b_blocknr;
		if (bh->b_state & b_state)
			gfs2_ail_error(gl, bh);
		bh->b_private = NULL;
		gfs2_remove_from_ail(bd); /* drops ref on bh */
		spin_unlock(&sdp->sd_ail_lock);

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

		gfs2_log_lock(sdp);
		gfs2_trans_add_revoke(sdp, bd);
		gfs2_log_unlock(sdp);

		spin_lock(&sdp->sd_ail_lock);
	}
	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
	spin_unlock(&sdp->sd_ail_lock);
}


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);
	INIT_LIST_HEAD(&tr.tr_list_buf);
	gfs2_log_reserve(sdp, tr.tr_reserved);
	BUG_ON(current->journal_info);
	current->journal_info = &tr;

	__gfs2_ail_flush(gl, (1ul << BH_Dirty)|(1ul << BH_Pinned)|(1ul << BH_Lock));

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

void gfs2_ail_flush(struct gfs2_glock *gl)
{
	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, (1ul << BH_Dirty)|(1ul << BH_Pinned));
	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);
	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 = 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
			inode->i_nlink = 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;

	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
		brelse(dibh);
		return -EIO;
	}

	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;
}

/**
 * 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)) {
		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 = rgrp_go_lock,
	.go_unlock = 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 SW	44	* @gl: the glock
	45	*
	46	* None of the buffers should be dirty, locked, or pinned.
	47	*/
	48
f1818529	49	static void __gfs2_ail_flush(struct gfs2_glock *gl, unsigned long b_state)
ddacfaf7 SW	50	{
ddacfaf7 SW	51	struct gfs2_sbd *sdp = gl->gl_sbd;
ddacfaf7 SW	52	struct list_head *head = &gl->gl_ail_list;
	53	struct gfs2_bufdata *bd;
	54	struct buffer_head *bh;
75549186	55	sector_t blocknr;
d8348de0	56
d6a079e8	57	spin_lock(&sdp->sd_ail_lock);
ddacfaf7 SW	58	while (!list_empty(head)) {
	59	bd = list_entry(head->next, struct gfs2_bufdata,
	60	bd_ail_gl_list);
	61	bh = bd->bd_bh;
75549186	62	blocknr = bh->b_blocknr;
f1818529	63	if (bh->b_state & b_state)
75549186	64	gfs2_ail_error(gl, bh);
1ad38c43	65	bh->b_private = NULL;
75549186	66	gfs2_remove_from_ail(bd); /* drops ref on bh */
380f7c65 SW	67	spin_unlock(&sdp->sd_ail_lock);
380f7c65 SW	68
75549186 SW	69	bd->bd_bh = NULL;
	70	bd->bd_blkno = blocknr;
	71
d6a079e8	72	gfs2_log_lock(sdp);
1ad38c43	73	gfs2_trans_add_revoke(sdp, bd);
d6a079e8 DC	74	gfs2_log_unlock(sdp);
	75
	76	spin_lock(&sdp->sd_ail_lock);
ddacfaf7 SW	77	}
ddacfaf7 SW	78	gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count));
d6a079e8	79	spin_unlock(&sdp->sd_ail_lock);
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);
	97	INIT_LIST_HEAD(&tr.tr_list_buf);
	98	gfs2_log_reserve(sdp, tr.tr_reserved);
	99	BUG_ON(current->journal_info);
	100	current->journal_info = &tr;
	101
f1818529	102	__gfs2_ail_flush(gl, (1ul << BH_Dirty)\|(1ul << BH_Pinned)\|(1ul << BH_Lock));
dba898b0 SW	103
	104	gfs2_trans_end(sdp);
	105	gfs2_log_flush(sdp, NULL);
	106	}
ddacfaf7	107
dba898b0 SW	108	void gfs2_ail_flush(struct gfs2_glock *gl)
	109	{
	110	struct gfs2_sbd *sdp = gl->gl_sbd;
	111	unsigned int revokes = atomic_read(&gl->gl_ail_count);
	112	int ret;
	113
	114	if (!revokes)
	115	return;
	116
	117	ret = gfs2_trans_begin(sdp, 0, revokes);
	118	if (ret)
	119	return;
f1818529	120	__gfs2_ail_flush(gl, (1ul << BH_Dirty)\|(1ul << BH_Pinned));
ddacfaf7 SW	121	gfs2_trans_end(sdp);
	122	gfs2_log_flush(sdp, NULL);
	123	}
ba7f7290 SW	124
ba7f7290 SW	125	/**
6bac243f	126	* rgrp_go_sync - sync out the metadata for this glock
b3b94faa	127	* @gl: the glock
b3b94faa DT	128	*
	129	* Called when demoting or unlocking an EX glock. We must flush
	130	* to disk all dirty buffers/pages relating to this glock, and must not
	131	* not return to caller to demote/unlock the glock until I/O is complete.
	132	*/
	133
6bac243f	134	static void rgrp_go_sync(struct gfs2_glock *gl)
b3b94faa	135	{
009d8518	136	struct address_space *metamapping = gfs2_glock2aspace(gl);
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);
b3b94faa DT	148	}
	149
	150	/**
6bac243f	151	* rgrp_go_inval - invalidate the metadata for this glock
b3b94faa DT	152	* @gl: the glock
	153	* @flags:
	154	*
6bac243f SW	155	* We never used LM_ST_DEFERRED with resource groups, so that we
	156	* should always see the metadata flag set here.
	157	*
b3b94faa DT	158	*/
b3b94faa DT	159
6bac243f	160	static void rgrp_go_inval(struct gfs2_glock *gl, int flags)
b3b94faa	161	{
009d8518	162	struct address_space *mapping = gfs2_glock2aspace(gl);
b3b94faa	163
6bac243f SW	164	BUG_ON(!(flags & DIO_METADATA));
	165	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	166	truncate_inode_pages(mapping, 0);
cf45b752	167
6bac243f SW	168	if (gl->gl_object) {
6bac243f SW	169	struct gfs2_rgrpd rgd = (struct gfs2_rgrpd )gl->gl_object;
cf45b752 BP	170	rgd->rd_flags &= ~GFS2_RDF_UPTODATE;
cf45b752 BP	171	}
b3b94faa DT	172	}
b3b94faa DT	173
b5d32bea SW	174	/**
	175	* inode_go_sync - Sync the dirty data and/or metadata for an inode glock
	176	* @gl: the glock protecting the inode
	177	*
	178	*/
	179
	180	static void inode_go_sync(struct gfs2_glock *gl)
	181	{
	182	struct gfs2_inode *ip = gl->gl_object;
009d8518	183	struct address_space *metamapping = gfs2_glock2aspace(gl);
3042a2cc SW	184	int error;
3042a2cc SW	185
b5d32bea SW	186	if (ip && !S_ISREG(ip->i_inode.i_mode))
b5d32bea SW	187	ip = NULL;
6bac243f SW	188	if (ip && test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags))
	189	unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0);
	190	if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags))
	191	return;
b5d32bea	192
6bac243f SW	193	BUG_ON(gl->gl_state != LM_ST_EXCLUSIVE);
	194
	195	gfs2_log_flush(gl->gl_sbd, gl);
	196	filemap_fdatawrite(metamapping);
	197	if (ip) {
	198	struct address_space *mapping = ip->i_inode.i_mapping;
	199	filemap_fdatawrite(mapping);
	200	error = filemap_fdatawait(mapping);
	201	mapping_set_error(mapping, error);
b5d32bea	202	}
6bac243f SW	203	error = filemap_fdatawait(metamapping);
	204	mapping_set_error(metamapping, error);
	205	gfs2_ail_empty_gl(gl);
52fcd11c SW	206	/*
	207	* Writeback of the data mapping may cause the dirty flag to be set
	208	* so we have to clear it again here.
	209	*/
	210	smp_mb__before_clear_bit();
	211	clear_bit(GLF_DIRTY, &gl->gl_flags);
b5d32bea SW	212	}
b5d32bea SW	213
b3b94faa DT	214	/**
	215	* inode_go_inval - prepare a inode glock to be released
	216	* @gl: the glock
	217	* @flags:
6bac243f SW	218	*
	219	* Normally we invlidate everything, but if we are moving into
	220	* LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we
	221	* can keep hold of the metadata, since it won't have changed.
b3b94faa DT	222	*
	223	*/
	224
	225	static void inode_go_inval(struct gfs2_glock *gl, int flags)
	226	{
b004157a	227	struct gfs2_inode *ip = gl->gl_object;
b3b94faa	228
6bac243f SW	229	gfs2_assert_withdraw(gl->gl_sbd, !atomic_read(&gl->gl_ail_count));
	230
	231	if (flags & DIO_METADATA) {
009d8518	232	struct address_space *mapping = gfs2_glock2aspace(gl);
6bac243f	233	truncate_inode_pages(mapping, 0);
c65f7fb5	234	if (ip) {
b004157a	235	set_bit(GIF_INVALID, &ip->i_flags);
c65f7fb5	236	forget_all_cached_acls(&ip->i_inode);
17d539f0	237	gfs2_dir_hash_inval(ip);
c65f7fb5	238	}
b004157a SW	239	}
b004157a SW	240
1ce53368 BM	241	if (ip == GFS2_I(gl->gl_sbd->sd_rindex)) {
1ce53368 BM	242	gfs2_log_flush(gl->gl_sbd, NULL);
6bac243f	243	gl->gl_sbd->sd_rindex_uptodate = 0;
1ce53368	244	}
3cc3f710	245	if (ip && S_ISREG(ip->i_inode.i_mode))
b004157a	246	truncate_inode_pages(ip->i_inode.i_mapping, 0);
b3b94faa DT	247	}
	248
	249	/**
	250	* inode_go_demote_ok - Check to see if it's ok to unlock an inode glock
	251	* @gl: the glock
	252	*
	253	* Returns: 1 if it's ok
	254	*/
	255
97cc1025	256	static int inode_go_demote_ok(const struct gfs2_glock *gl)
b3b94faa DT	257	{
b3b94faa DT	258	struct gfs2_sbd *sdp = gl->gl_sbd;
bc015cb8 SW	259	struct gfs2_holder *gh;
bc015cb8 SW	260
97cc1025 SW	261	if (sdp->sd_jindex == gl->gl_object \|\| sdp->sd_rindex == gl->gl_object)
97cc1025 SW	262	return 0;
bc015cb8 SW	263
	264	if (!list_empty(&gl->gl_holders)) {
	265	gh = list_entry(gl->gl_holders.next, struct gfs2_holder, gh_list);
	266	if (gh->gh_list.next != &gl->gl_holders)
	267	return 0;
	268	}
	269
97cc1025	270	return 1;
b3b94faa DT	271	}
b3b94faa DT	272
d4b2cf1b SW	273	/**
	274	* gfs2_set_nlink - Set the inode's link count based on on-disk info
	275	* @inode: The inode in question
	276	* @nlink: The link count
	277	*
	278	* If the link count has hit zero, it must never be raised, whatever the
	279	* on-disk inode might say. When new struct inodes are created the link
	280	* count is set to 1, so that we can safely use this test even when reading
	281	* in on disk information for the first time.
	282	*/
	283
	284	static void gfs2_set_nlink(struct inode *inode, u32 nlink)
	285	{
	286	/*
	287	* We will need to review setting the nlink count here in the
	288	* light of the forthcoming ro bind mount work. This is a reminder
	289	* to do that.
	290	*/
	291	if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) {
	292	if (nlink == 0)
	293	clear_nlink(inode);
	294	else
	295	inode->i_nlink = nlink;
	296	}
	297	}
	298
	299	static int gfs2_dinode_in(struct gfs2_inode ip, const void buf)
	300	{
	301	const struct gfs2_dinode *str = buf;
	302	struct timespec atime;
	303	u16 height, depth;
	304
	305	if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
	306	goto corrupt;
	307	ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
	308	ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
	309	ip->i_inode.i_rdev = 0;
	310	switch (ip->i_inode.i_mode & S_IFMT) {
	311	case S_IFBLK:
	312	case S_IFCHR:
	313	ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
	314	be32_to_cpu(str->di_minor));
	315	break;
	316	};
	317
	318	ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
	319	ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
	320	gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink));
	321	i_size_write(&ip->i_inode, be64_to_cpu(str->di_size));
	322	gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
	323	atime.tv_sec = be64_to_cpu(str->di_atime);
	324	atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
	325	if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
	326	ip->i_inode.i_atime = atime;
	327	ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
	328	ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
	329	ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
	330	ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
	331
	332	ip->i_goal = be64_to_cpu(str->di_goal_meta);
	333	ip->i_generation = be64_to_cpu(str->di_generation);
	334
	335	ip->i_diskflags = be32_to_cpu(str->di_flags);
9964afbb SW	336	ip->i_eattr = be64_to_cpu(str->di_eattr);
9964afbb SW	337	/* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */
d4b2cf1b SW	338	gfs2_set_inode_flags(&ip->i_inode);
	339	height = be16_to_cpu(str->di_height);
	340	if (unlikely(height > GFS2_MAX_META_HEIGHT))
	341	goto corrupt;
	342	ip->i_height = (u8)height;
	343
	344	depth = be16_to_cpu(str->di_depth);
	345	if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
	346	goto corrupt;
	347	ip->i_depth = (u8)depth;
	348	ip->i_entries = be32_to_cpu(str->di_entries);
	349
d4b2cf1b SW	350	if (S_ISREG(ip->i_inode.i_mode))
	351	gfs2_set_aops(&ip->i_inode);
	352
	353	return 0;
	354	corrupt:
	355	gfs2_consist_inode(ip);
	356	return -EIO;
	357	}
	358
	359	/**
	360	* gfs2_inode_refresh - Refresh the incore copy of the dinode
	361	* @ip: The GFS2 inode
	362	*
	363	* Returns: errno
	364	*/
	365
	366	int gfs2_inode_refresh(struct gfs2_inode *ip)
	367	{
	368	struct buffer_head *dibh;
	369	int error;
	370
	371	error = gfs2_meta_inode_buffer(ip, &dibh);
	372	if (error)
	373	return error;
	374
	375	if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
	376	brelse(dibh);
	377	return -EIO;
	378	}
	379
	380	error = gfs2_dinode_in(ip, dibh->b_data);
	381	brelse(dibh);
	382	clear_bit(GIF_INVALID, &ip->i_flags);
	383
	384	return error;
	385	}
	386
b3b94faa DT	387	/**
	388	* inode_go_lock - operation done after an inode lock is locked by a process
	389	* @gl: the glock
	390	* @flags:
	391	*
	392	* Returns: errno
	393	*/
	394
	395	static int inode_go_lock(struct gfs2_holder *gh)
	396	{
	397	struct gfs2_glock *gl = gh->gh_gl;
813e0c46	398	struct gfs2_sbd *sdp = gl->gl_sbd;
5c676f6d	399	struct gfs2_inode *ip = gl->gl_object;
b3b94faa DT	400	int error = 0;
b3b94faa DT	401
091806ed	402	if (!ip \|\| (gh->gh_flags & GL_SKIP))
b3b94faa DT	403	return 0;
b3b94faa DT	404
bfded27b	405	if (test_bit(GIF_INVALID, &ip->i_flags)) {
b3b94faa DT	406	error = gfs2_inode_refresh(ip);
	407	if (error)
	408	return error;
b3b94faa DT	409	}
b3b94faa DT	410
383f01fb	411	if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) &&
b3b94faa	412	(gl->gl_state == LM_ST_EXCLUSIVE) &&
813e0c46 SW	413	(gh->gh_state == LM_ST_EXCLUSIVE)) {
	414	spin_lock(&sdp->sd_trunc_lock);
	415	if (list_empty(&ip->i_trunc_list))
	416	list_add(&sdp->sd_trunc_list, &ip->i_trunc_list);
	417	spin_unlock(&sdp->sd_trunc_lock);
	418	wake_up(&sdp->sd_quota_wait);
	419	return 1;
	420	}
b3b94faa DT	421
	422	return error;
	423	}
	424
6802e340 SW	425	/**
	426	* inode_go_dump - print information about an inode
	427	* @seq: The iterator
	428	* @ip: the inode
	429	*
	430	* Returns: 0 on success, -ENOBUFS when we run out of space
	431	*/
	432
	433	static int inode_go_dump(struct seq_file seq, const struct gfs2_glock gl)
	434	{
	435	const struct gfs2_inode *ip = gl->gl_object;
	436	if (ip == NULL)
	437	return 0;
a2e0f799	438	gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n",
6802e340 SW	439	(unsigned long long)ip->i_no_formal_ino,
6802e340 SW	440	(unsigned long long)ip->i_no_addr,
fa75cedc SW	441	IF2DT(ip->i_inode.i_mode), ip->i_flags,
fa75cedc SW	442	(unsigned int)ip->i_diskflags,
a2e0f799	443	(unsigned long long)i_size_read(&ip->i_inode));
6802e340 SW	444	return 0;
	445	}
	446
b3b94faa DT	447	/**
	448	* rgrp_go_lock - operation done after an rgrp lock is locked by
	449	* a first holder on this node.
	450	* @gl: the glock
	451	* @flags:
	452	*
	453	* Returns: errno
	454	*/
	455
	456	static int rgrp_go_lock(struct gfs2_holder *gh)
	457	{
5c676f6d	458	return gfs2_rgrp_bh_get(gh->gh_gl->gl_object);
b3b94faa DT	459	}
	460
	461	/**
	462	* rgrp_go_unlock - operation done before an rgrp lock is unlocked by
	463	* a last holder on this node.
	464	* @gl: the glock
	465	* @flags:
	466	*
	467	*/
	468
	469	static void rgrp_go_unlock(struct gfs2_holder *gh)
	470	{
5c676f6d	471	gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
b3b94faa DT	472	}
	473
	474	/**
3042a2cc	475	* trans_go_sync - promote/demote the transaction glock
b3b94faa DT	476	* @gl: the glock
	477	* @state: the requested state
	478	* @flags:
	479	*
	480	*/
	481
3042a2cc	482	static void trans_go_sync(struct gfs2_glock *gl)
b3b94faa DT	483	{
	484	struct gfs2_sbd *sdp = gl->gl_sbd;
	485
	486	if (gl->gl_state != LM_ST_UNLOCKED &&
	487	test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
	488	gfs2_meta_syncfs(sdp);
	489	gfs2_log_shutdown(sdp);
	490	}
b3b94faa DT	491	}
	492
	493	/**
	494	* trans_go_xmote_bh - After promoting/demoting the transaction glock
	495	* @gl: the glock
	496	*
	497	*/
	498
6802e340	499	static int trans_go_xmote_bh(struct gfs2_glock gl, struct gfs2_holder gh)
b3b94faa DT	500	{
b3b94faa DT	501	struct gfs2_sbd *sdp = gl->gl_sbd;
feaa7bba	502	struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode);
5c676f6d	503	struct gfs2_glock *j_gl = ip->i_gl;
55167622	504	struct gfs2_log_header_host head;
b3b94faa DT	505	int error;
b3b94faa DT	506
6802e340	507	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
1a14d3a6	508	j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
b3b94faa DT	509
	510	error = gfs2_find_jhead(sdp->sd_jdesc, &head);
	511	if (error)
	512	gfs2_consist(sdp);
	513	if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
	514	gfs2_consist(sdp);
	515
	516	/* Initialize some head of the log stuff */
	517	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
	518	sdp->sd_log_sequence = head.lh_sequence + 1;
	519	gfs2_log_pointers_init(sdp, head.lh_blkno);
	520	}
	521	}
6802e340	522	return 0;
b3b94faa DT	523	}
b3b94faa DT	524
97cc1025 SW	525	/**
	526	* trans_go_demote_ok
	527	* @gl: the glock
	528	*
	529	* Always returns 0
	530	*/
	531
	532	static int trans_go_demote_ok(const struct gfs2_glock *gl)
	533	{
	534	return 0;
	535	}
	536
b94a170e BM	537	/**
	538	* iopen_go_callback - schedule the dcache entry for the inode to be deleted
	539	* @gl: the glock
	540	*
	541	* gl_spin lock is held while calling this
	542	*/
	543	static void iopen_go_callback(struct gfs2_glock *gl)
	544	{
	545	struct gfs2_inode ip = (struct gfs2_inode )gl->gl_object;
001e8e8d SW	546	struct gfs2_sbd *sdp = gl->gl_sbd;
	547
	548	if (sdp->sd_vfs->s_flags & MS_RDONLY)
	549	return;
b94a170e BM	550
b94a170e BM	551	if (gl->gl_demote_state == LM_ST_UNLOCKED &&
009d8518	552	gl->gl_state == LM_ST_SHARED && ip) {
b94a170e BM	553	gfs2_glock_hold(gl);
	554	if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0)
	555	gfs2_glock_put_nolock(gl);
	556	}
	557	}
	558
8fb4b536	559	const struct gfs2_glock_operations gfs2_meta_glops = {
ea67eedb	560	.go_type = LM_TYPE_META,
b3b94faa DT	561	};
b3b94faa DT	562
8fb4b536	563	const struct gfs2_glock_operations gfs2_inode_glops = {
3042a2cc	564	.go_xmote_th = inode_go_sync,
b3b94faa DT	565	.go_inval = inode_go_inval,
	566	.go_demote_ok = inode_go_demote_ok,
	567	.go_lock = inode_go_lock,
6802e340	568	.go_dump = inode_go_dump,
ea67eedb	569	.go_type = LM_TYPE_INODE,
009d8518	570	.go_flags = GLOF_ASPACE,
b3b94faa DT	571	};
b3b94faa DT	572
8fb4b536	573	const struct gfs2_glock_operations gfs2_rgrp_glops = {
6bac243f SW	574	.go_xmote_th = rgrp_go_sync,
6bac243f SW	575	.go_inval = rgrp_go_inval,
b3b94faa DT	576	.go_lock = rgrp_go_lock,
b3b94faa DT	577	.go_unlock = rgrp_go_unlock,
09010978	578	.go_dump = gfs2_rgrp_dump,
ea67eedb	579	.go_type = LM_TYPE_RGRP,
009d8518	580	.go_flags = GLOF_ASPACE,
b3b94faa DT	581	};
b3b94faa DT	582
8fb4b536	583	const struct gfs2_glock_operations gfs2_trans_glops = {
3042a2cc	584	.go_xmote_th = trans_go_sync,
b3b94faa	585	.go_xmote_bh = trans_go_xmote_bh,
97cc1025	586	.go_demote_ok = trans_go_demote_ok,
ea67eedb	587	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	588	};
b3b94faa DT	589
8fb4b536	590	const struct gfs2_glock_operations gfs2_iopen_glops = {
ea67eedb	591	.go_type = LM_TYPE_IOPEN,
b94a170e	592	.go_callback = iopen_go_callback,
b3b94faa DT	593	};
b3b94faa DT	594
8fb4b536	595	const struct gfs2_glock_operations gfs2_flock_glops = {
ea67eedb	596	.go_type = LM_TYPE_FLOCK,
b3b94faa DT	597	};
b3b94faa DT	598
8fb4b536	599	const struct gfs2_glock_operations gfs2_nondisk_glops = {
ea67eedb	600	.go_type = LM_TYPE_NONDISK,
b3b94faa DT	601	};
b3b94faa DT	602
8fb4b536	603	const struct gfs2_glock_operations gfs2_quota_glops = {
ea67eedb	604	.go_type = LM_TYPE_QUOTA,
b3b94faa DT	605	};
b3b94faa DT	606
8fb4b536	607	const struct gfs2_glock_operations gfs2_journal_glops = {
ea67eedb	608	.go_type = LM_TYPE_JOURNAL,
b3b94faa DT	609	};
b3b94faa DT	610
64d576ba SW	611	const struct gfs2_glock_operations *gfs2_glops_list[] = {
	612	[LM_TYPE_META] = &gfs2_meta_glops,
	613	[LM_TYPE_INODE] = &gfs2_inode_glops,
	614	[LM_TYPE_RGRP] = &gfs2_rgrp_glops,
64d576ba SW	615	[LM_TYPE_IOPEN] = &gfs2_iopen_glops,
	616	[LM_TYPE_FLOCK] = &gfs2_flock_glops,
	617	[LM_TYPE_NONDISK] = &gfs2_nondisk_glops,
	618	[LM_TYPE_QUOTA] = &gfs2_quota_glops,
	619	[LM_TYPE_JOURNAL] = &gfs2_journal_glops,
	620	};
	621