--- /dev/null
+/*
+ * 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);
+ init_rwsem(&ip->i_rw_mutex);
+ INIT_LIST_HEAD(&ip->i_trunc_list);
+ ip->i_res = NULL;
+ ip->i_hash_cache = NULL;
+}
+
+static void gfs2_init_glock_once(void *foo)
+{
+ struct gfs2_glock *gl = foo;
+
+ INIT_HLIST_BL_NODE(&gl->gl_list);
+ spin_lock_init(&gl->gl_spin);
+ 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;
+
+ 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;
+
+ 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;
+
+ gfs2_inode_cachep = kmem_cache_create("gfs2_inode",
+ sizeof(struct gfs2_inode),
+ 0, SLAB_RECLAIM_ACCOUNT|
+ SLAB_MEM_SPREAD,
+ gfs2_init_inode_once);
+ if (!gfs2_inode_cachep)
+ goto fail;
+
+ gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata",
+ sizeof(struct gfs2_bufdata),
+ 0, 0, NULL);
+ if (!gfs2_bufdata_cachep)
+ goto fail;
+
+ gfs2_rgrpd_cachep = kmem_cache_create("gfs2_rgrpd",
+ sizeof(struct gfs2_rgrpd),
+ 0, 0, NULL);
+ if (!gfs2_rgrpd_cachep)
+ goto fail;
+
+ gfs2_quotad_cachep = kmem_cache_create("gfs2_quotad",
+ sizeof(struct gfs2_quota_data),
+ 0, 0, NULL);
+ if (!gfs2_quotad_cachep)
+ goto fail;
+
+ gfs2_rsrv_cachep = kmem_cache_create("gfs2_mblk",
+ sizeof(struct gfs2_blkreserv),
+ 0, 0, NULL);
+ if (!gfs2_rsrv_cachep)
+ goto fail;
+
+ register_shrinker(&gfs2_qd_shrinker);
+
+ error = register_filesystem(&gfs2_fs_type);
+ if (error)
+ goto fail;
+
+ error = register_filesystem(&gfs2meta_fs_type);
+ if (error)
+ goto fail_unregister;
+
+ error = -ENOMEM;
+ gfs_recovery_wq = alloc_workqueue("gfs_recovery",
+ WQ_MEM_RECLAIM | WQ_FREEZABLE, 0);
+ if (!gfs_recovery_wq)
+ goto fail_wq;
+
+ gfs2_control_wq = alloc_workqueue("gfs2_control",
+ WQ_UNBOUND | WQ_FREEZABLE, 0);
+ if (!gfs2_control_wq)
+ goto fail_recovery;
+
+ gfs2_freeze_wq = alloc_workqueue("freeze_workqueue", 0, 0);
+
+ if (!gfs2_freeze_wq)
+ goto fail_control;
+
+ gfs2_page_pool = mempool_create_page_pool(64, 0);
+ if (!gfs2_page_pool)
+ goto fail_freeze;
+
+ gfs2_register_debugfs();
+
+ pr_info("GFS2 installed\n");
+
+ return 0;
+
+fail_freeze:
+ destroy_workqueue(gfs2_freeze_wq);
+fail_control:
+ destroy_workqueue(gfs2_control_wq);
+fail_recovery:
+ destroy_workqueue(gfs_recovery_wq);
+fail_wq:
+ unregister_filesystem(&gfs2meta_fs_type);
+fail_unregister:
+ unregister_filesystem(&gfs2_fs_type);
+fail:
+ list_lru_destroy(&gfs2_qd_lru);
+fail_lru:
+ unregister_shrinker(&gfs2_qd_shrinker);
+ gfs2_glock_exit();
+
+ if (gfs2_rsrv_cachep)
+ kmem_cache_destroy(gfs2_rsrv_cachep);
+
+ if (gfs2_quotad_cachep)
+ kmem_cache_destroy(gfs2_quotad_cachep);
+
+ if (gfs2_rgrpd_cachep)
+ kmem_cache_destroy(gfs2_rgrpd_cachep);
+
+ if (gfs2_bufdata_cachep)
+ kmem_cache_destroy(gfs2_bufdata_cachep);
+
+ if (gfs2_inode_cachep)
+ kmem_cache_destroy(gfs2_inode_cachep);
+
+ if (gfs2_glock_aspace_cachep)
+ kmem_cache_destroy(gfs2_glock_aspace_cachep);
+
+ if (gfs2_glock_cachep)
+ kmem_cache_destroy(gfs2_glock_cachep);
+
+ 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_rsrv_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);
+
Code Review / kvmfornfv.git / blobdiff