mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-11 21:38:32 +08:00
2abbf9a4d2
When calling debugfs functions, there is no need to ever check the return value. The function can work or not, but the code logic should never do something different based on this. There is no need to save the dentries for the debugfs files, so drop those variables to save a bit of space and make the code simpler. Cc: Bob Peterson <rpeterso@redhat.com> Cc: Andreas Gruenbacher <agruenba@redhat.com> Cc: cluster-devel@redhat.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
260 lines
6.0 KiB
C
260 lines
6.0 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 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.
|
|
*/
|
|
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
|
|
#include <linux/slab.h>
|
|
#include <linux/spinlock.h>
|
|
#include <linux/completion.h>
|
|
#include <linux/buffer_head.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/gfs2_ondisk.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/rculist_bl.h>
|
|
#include <linux/atomic.h>
|
|
#include <linux/mempool.h>
|
|
|
|
#include "gfs2.h"
|
|
#include "incore.h"
|
|
#include "super.h"
|
|
#include "sys.h"
|
|
#include "util.h"
|
|
#include "glock.h"
|
|
#include "quota.h"
|
|
#include "recovery.h"
|
|
#include "dir.h"
|
|
#include "glops.h"
|
|
|
|
struct workqueue_struct *gfs2_control_wq;
|
|
|
|
static void gfs2_init_inode_once(void *foo)
|
|
{
|
|
struct gfs2_inode *ip = foo;
|
|
|
|
inode_init_once(&ip->i_inode);
|
|
atomic_set(&ip->i_sizehint, 0);
|
|
init_rwsem(&ip->i_rw_mutex);
|
|
INIT_LIST_HEAD(&ip->i_trunc_list);
|
|
ip->i_qadata = NULL;
|
|
gfs2_holder_mark_uninitialized(&ip->i_rgd_gh);
|
|
memset(&ip->i_res, 0, sizeof(ip->i_res));
|
|
RB_CLEAR_NODE(&ip->i_res.rs_node);
|
|
ip->i_hash_cache = NULL;
|
|
gfs2_holder_mark_uninitialized(&ip->i_iopen_gh);
|
|
}
|
|
|
|
static void gfs2_init_glock_once(void *foo)
|
|
{
|
|
struct gfs2_glock *gl = foo;
|
|
|
|
spin_lock_init(&gl->gl_lockref.lock);
|
|
INIT_LIST_HEAD(&gl->gl_holders);
|
|
INIT_LIST_HEAD(&gl->gl_lru);
|
|
INIT_LIST_HEAD(&gl->gl_ail_list);
|
|
atomic_set(&gl->gl_ail_count, 0);
|
|
atomic_set(&gl->gl_revokes, 0);
|
|
}
|
|
|
|
static void gfs2_init_gl_aspace_once(void *foo)
|
|
{
|
|
struct gfs2_glock *gl = foo;
|
|
struct address_space *mapping = (struct address_space *)(gl + 1);
|
|
|
|
gfs2_init_glock_once(gl);
|
|
address_space_init_once(mapping);
|
|
}
|
|
|
|
/**
|
|
* init_gfs2_fs - Register GFS2 as a filesystem
|
|
*
|
|
* Returns: 0 on success, error code on failure
|
|
*/
|
|
|
|
static int __init init_gfs2_fs(void)
|
|
{
|
|
int error;
|
|
|
|
gfs2_str2qstr(&gfs2_qdot, ".");
|
|
gfs2_str2qstr(&gfs2_qdotdot, "..");
|
|
gfs2_quota_hash_init();
|
|
|
|
error = gfs2_sys_init();
|
|
if (error)
|
|
return error;
|
|
|
|
error = list_lru_init(&gfs2_qd_lru);
|
|
if (error)
|
|
goto fail_lru;
|
|
|
|
error = gfs2_glock_init();
|
|
if (error)
|
|
goto fail_glock;
|
|
|
|
error = -ENOMEM;
|
|
gfs2_glock_cachep = kmem_cache_create("gfs2_glock",
|
|
sizeof(struct gfs2_glock),
|
|
0, 0,
|
|
gfs2_init_glock_once);
|
|
if (!gfs2_glock_cachep)
|
|
goto fail_cachep1;
|
|
|
|
gfs2_glock_aspace_cachep = kmem_cache_create("gfs2_glock(aspace)",
|
|
sizeof(struct gfs2_glock) +
|
|
sizeof(struct address_space),
|
|
0, 0, gfs2_init_gl_aspace_once);
|
|
|
|
if (!gfs2_glock_aspace_cachep)
|
|
goto fail_cachep2;
|
|
|
|
gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
|
|
sizeof(struct gfs2_inode),
|
|
0, SLAB_RECLAIM_ACCOUNT|
|
|
SLAB_MEM_SPREAD|
|
|
SLAB_ACCOUNT,
|
|
gfs2_init_inode_once);
|
|
if (!gfs2_inode_cachep)
|
|
goto fail_cachep3;
|
|
|
|
gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
|
|
sizeof(struct gfs2_bufdata),
|
|
0, 0, NULL);
|
|
if (!gfs2_bufdata_cachep)
|
|
goto fail_cachep4;
|
|
|
|
gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
|
|
sizeof(struct gfs2_rgrpd),
|
|
0, 0, NULL);
|
|
if (!gfs2_rgrpd_cachep)
|
|
goto fail_cachep5;
|
|
|
|
gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
|
|
sizeof(struct gfs2_quota_data),
|
|
0, 0, NULL);
|
|
if (!gfs2_quotad_cachep)
|
|
goto fail_cachep6;
|
|
|
|
gfs2_qadata_cachep = kmem_cache_create("gfs2_qadata",
|
|
sizeof(struct gfs2_qadata),
|
|
0, 0, NULL);
|
|
if (!gfs2_qadata_cachep)
|
|
goto fail_cachep7;
|
|
|
|
error = register_shrinker(&gfs2_qd_shrinker);
|
|
if (error)
|
|
goto fail_shrinker;
|
|
|
|
error = register_filesystem(&gfs2_fs_type);
|
|
if (error)
|
|
goto fail_fs1;
|
|
|
|
error = register_filesystem(&gfs2meta_fs_type);
|
|
if (error)
|
|
goto fail_fs2;
|
|
|
|
error = -ENOMEM;
|
|
gfs_recovery_wq = alloc_workqueue("gfs_recovery",
|
|
WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
|
|
if (!gfs_recovery_wq)
|
|
goto fail_wq1;
|
|
|
|
gfs2_control_wq = alloc_workqueue("gfs2_control",
|
|
WQ_UNBOUND | WQ_FREEZABLE, 0);
|
|
if (!gfs2_control_wq)
|
|
goto fail_wq2;
|
|
|
|
gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
|
|
|
|
if (!gfs2_freeze_wq)
|
|
goto fail_wq3;
|
|
|
|
gfs2_page_pool = mempool_create_page_pool(64, 0);
|
|
if (!gfs2_page_pool)
|
|
goto fail_mempool;
|
|
|
|
gfs2_register_debugfs();
|
|
|
|
pr_info("GFS2 installed\n");
|
|
|
|
return 0;
|
|
|
|
fail_mempool:
|
|
destroy_workqueue(gfs2_freeze_wq);
|
|
fail_wq3:
|
|
destroy_workqueue(gfs2_control_wq);
|
|
fail_wq2:
|
|
destroy_workqueue(gfs_recovery_wq);
|
|
fail_wq1:
|
|
unregister_filesystem(&gfs2meta_fs_type);
|
|
fail_fs2:
|
|
unregister_filesystem(&gfs2_fs_type);
|
|
fail_fs1:
|
|
unregister_shrinker(&gfs2_qd_shrinker);
|
|
fail_shrinker:
|
|
kmem_cache_destroy(gfs2_qadata_cachep);
|
|
fail_cachep7:
|
|
kmem_cache_destroy(gfs2_quotad_cachep);
|
|
fail_cachep6:
|
|
kmem_cache_destroy(gfs2_rgrpd_cachep);
|
|
fail_cachep5:
|
|
kmem_cache_destroy(gfs2_bufdata_cachep);
|
|
fail_cachep4:
|
|
kmem_cache_destroy(gfs2_inode_cachep);
|
|
fail_cachep3:
|
|
kmem_cache_destroy(gfs2_glock_aspace_cachep);
|
|
fail_cachep2:
|
|
kmem_cache_destroy(gfs2_glock_cachep);
|
|
fail_cachep1:
|
|
gfs2_glock_exit();
|
|
fail_glock:
|
|
list_lru_destroy(&gfs2_qd_lru);
|
|
fail_lru:
|
|
gfs2_sys_uninit();
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* exit_gfs2_fs - Unregister the file system
|
|
*
|
|
*/
|
|
|
|
static void __exit exit_gfs2_fs(void)
|
|
{
|
|
unregister_shrinker(&gfs2_qd_shrinker);
|
|
gfs2_glock_exit();
|
|
gfs2_unregister_debugfs();
|
|
unregister_filesystem(&gfs2_fs_type);
|
|
unregister_filesystem(&gfs2meta_fs_type);
|
|
destroy_workqueue(gfs_recovery_wq);
|
|
destroy_workqueue(gfs2_control_wq);
|
|
destroy_workqueue(gfs2_freeze_wq);
|
|
list_lru_destroy(&gfs2_qd_lru);
|
|
|
|
rcu_barrier();
|
|
|
|
mempool_destroy(gfs2_page_pool);
|
|
kmem_cache_destroy(gfs2_qadata_cachep);
|
|
kmem_cache_destroy(gfs2_quotad_cachep);
|
|
kmem_cache_destroy(gfs2_rgrpd_cachep);
|
|
kmem_cache_destroy(gfs2_bufdata_cachep);
|
|
kmem_cache_destroy(gfs2_inode_cachep);
|
|
kmem_cache_destroy(gfs2_glock_aspace_cachep);
|
|
kmem_cache_destroy(gfs2_glock_cachep);
|
|
|
|
gfs2_sys_uninit();
|
|
}
|
|
|
|
MODULE_DESCRIPTION("Global File System");
|
|
MODULE_AUTHOR("Red Hat, Inc.");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(init_gfs2_fs);
|
|
module_exit(exit_gfs2_fs);
|
|
|