lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ocfs2: Implementation of local and global quota file handling

Browse Source 
For each quota type each node has local quota file. In this file it stores
changes users have made to disk usage via this node. Once in a while this
information is synced to global file (and thus with other nodes) so that
limits enforcement at least aproximately works.

Global quota files contain all the information about usage and limits. It's
mostly handled by the generic VFS code (which implements a trie of structures
inside a quota file). We only have to provide functions to convert structures
from on-disk format to in-memory one. We also have to provide wrappers for
various quota functions starting transactions and acquiring necessary cluster
locks before the actual IO is really started.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Jan Kara
2008-08-25 19:56:50 +02:00
committed by Mark Fasheh
parent bbbd0eb34b
commit 9e33d69f55
13 changed files with 2165 additions and 5 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
fs/ocfs2/super.c
View File

@ -65,10 +65,13 @@
#include "uptodate.h"
#include "ver.h"
#include "xattr.h"
#include "quota.h"
#include "buffer_head_io.h"
static struct kmem_cache *ocfs2_inode_cachep = NULL;
struct kmem_cache *ocfs2_dquot_cachep;
struct kmem_cache *ocfs2_qf_chunk_cachep;
/* OCFS2 needs to schedule several differnt types of work which
* require cluster locking, disk I/O, recovery waits, etc. Since these
@ -137,6 +140,8 @@ static const struct super_operations ocfs2_sops = {
.put_super = ocfs2_put_super,
.remount_fs = ocfs2_remount,
.show_options = ocfs2_show_options,
.quota_read = ocfs2_quota_read,
.quota_write = ocfs2_quota_write,
};
enum {
@ -1104,6 +1109,7 @@ static int __init ocfs2_init(void)
ocfs2_set_locking_protocol();
status = register_quota_format(&ocfs2_quota_format);
leave:
if (status < 0) {
ocfs2_free_mem_caches();
@ -1127,6 +1133,8 @@ static void __exit ocfs2_exit(void)
destroy_workqueue(ocfs2_wq);
}
unregister_quota_format(&ocfs2_quota_format);
debugfs_remove(ocfs2_debugfs_root);
ocfs2_free_mem_caches();
@ -1242,8 +1250,27 @@ static int ocfs2_initialize_mem_caches(void)
(SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
ocfs2_inode_init_once);
if (!ocfs2_inode_cachep)
ocfs2_dquot_cachep = kmem_cache_create("ocfs2_dquot_cache",
sizeof(struct ocfs2_dquot),
0,
(SLAB_HWCACHE_ALIGN|SLAB_RECLAIM_ACCOUNT|
SLAB_MEM_SPREAD),
NULL);
ocfs2_qf_chunk_cachep = kmem_cache_create("ocfs2_qf_chunk_cache",
sizeof(struct ocfs2_quota_chunk),
0,
(SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD),
NULL);
if (!ocfs2_inode_cachep || !ocfs2_dquot_cachep ||
!ocfs2_qf_chunk_cachep) {
if (ocfs2_inode_cachep)
kmem_cache_destroy(ocfs2_inode_cachep);
if (ocfs2_dquot_cachep)
kmem_cache_destroy(ocfs2_dquot_cachep);
if (ocfs2_qf_chunk_cachep)
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
return -ENOMEM;
}
return 0;
}
@ -1252,8 +1279,15 @@ static void ocfs2_free_mem_caches(void)
{
if (ocfs2_inode_cachep)
kmem_cache_destroy(ocfs2_inode_cachep);
ocfs2_inode_cachep = NULL;
if (ocfs2_dquot_cachep)
kmem_cache_destroy(ocfs2_dquot_cachep);
ocfs2_dquot_cachep = NULL;
if (ocfs2_qf_chunk_cachep)
kmem_cache_destroy(ocfs2_qf_chunk_cachep);
ocfs2_qf_chunk_cachep = NULL;
}
static int ocfs2_get_sector(struct super_block *sb,