de474ee8bb
ocfs2_lock_allocators_move_extents() was like the common ocfs2_lock_allocators(), to lock metadata and data alloctors during extents moving, reserve appropriate metadata blocks and data clusters, also performa a best- effort to calculate the credits for journal transaction in one run of movement. Signed-off-by: Tristan Ye <tristan.ye@oracle.com>
117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* move_extents.c
|
|
*
|
|
* Copyright (C) 2011 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
#include <linux/fs.h>
|
|
#include <linux/types.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/swap.h>
|
|
|
|
#include <cluster/masklog.h>
|
|
|
|
#include "ocfs2.h"
|
|
#include "ocfs2_ioctl.h"
|
|
|
|
#include "alloc.h"
|
|
#include "aops.h"
|
|
#include "dlmglue.h"
|
|
#include "extent_map.h"
|
|
#include "inode.h"
|
|
#include "journal.h"
|
|
#include "suballoc.h"
|
|
#include "uptodate.h"
|
|
#include "super.h"
|
|
#include "dir.h"
|
|
#include "buffer_head_io.h"
|
|
#include "sysfile.h"
|
|
#include "suballoc.h"
|
|
#include "refcounttree.h"
|
|
#include "move_extents.h"
|
|
|
|
struct ocfs2_move_extents_context {
|
|
struct inode *inode;
|
|
struct file *file;
|
|
int auto_defrag;
|
|
int credits;
|
|
u32 new_phys_cpos;
|
|
u32 clusters_moved;
|
|
u64 refcount_loc;
|
|
struct ocfs2_move_extents *range;
|
|
struct ocfs2_extent_tree et;
|
|
struct ocfs2_alloc_context *meta_ac;
|
|
struct ocfs2_alloc_context *data_ac;
|
|
struct ocfs2_cached_dealloc_ctxt dealloc;
|
|
};
|
|
|
|
/*
|
|
* lock allocators, and reserving appropriate number of bits for
|
|
* meta blocks and data clusters.
|
|
*
|
|
* in some cases, we don't need to reserve clusters, just let data_ac
|
|
* be NULL.
|
|
*/
|
|
static int ocfs2_lock_allocators_move_extents(struct inode *inode,
|
|
struct ocfs2_extent_tree *et,
|
|
u32 clusters_to_move,
|
|
u32 extents_to_split,
|
|
struct ocfs2_alloc_context **meta_ac,
|
|
struct ocfs2_alloc_context **data_ac,
|
|
int extra_blocks,
|
|
int *credits)
|
|
{
|
|
int ret, num_free_extents;
|
|
unsigned int max_recs_needed = 2 * extents_to_split + clusters_to_move;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
num_free_extents = ocfs2_num_free_extents(osb, et);
|
|
if (num_free_extents < 0) {
|
|
ret = num_free_extents;
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (!num_free_extents ||
|
|
(ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed))
|
|
extra_blocks += ocfs2_extend_meta_needed(et->et_root_el);
|
|
|
|
ret = ocfs2_reserve_new_metadata_blocks(osb, extra_blocks, meta_ac);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
|
|
if (data_ac) {
|
|
ret = ocfs2_reserve_clusters(osb, clusters_to_move, data_ac);
|
|
if (ret) {
|
|
mlog_errno(ret);
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
*credits += ocfs2_calc_extend_credits(osb->sb, et->et_root_el,
|
|
clusters_to_move + 2);
|
|
|
|
mlog(0, "reserve metadata_blocks: %d, data_clusters: %u, credits: %d\n",
|
|
extra_blocks, clusters_to_move, *credits);
|
|
out:
|
|
if (ret) {
|
|
if (*meta_ac) {
|
|
ocfs2_free_alloc_context(*meta_ac);
|
|
*meta_ac = NULL;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|