diff options
Diffstat (limited to 'fs/gfs2/main.c')
| -rw-r--r-- | fs/gfs2/main.c | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c new file mode 100644 index 000000000000..21508a13bb78 --- /dev/null +++ b/fs/gfs2/main.c @@ -0,0 +1,150 @@ +/* + * 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. + */ + +#include <linux/sched.h> +#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/lm_interface.h> +#include <asm/atomic.h> + +#include "gfs2.h" +#include "incore.h" +#include "ops_fstype.h" +#include "sys.h" +#include "util.h" +#include "glock.h" + +static void gfs2_init_inode_once(void *foo, kmem_cache_t *cachep, unsigned long flags) +{ + struct gfs2_inode *ip = foo; + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) { + inode_init_once(&ip->i_inode); + spin_lock_init(&ip->i_spin); + init_rwsem(&ip->i_rw_mutex); + memset(ip->i_cache, 0, sizeof(ip->i_cache)); + } +} + +static void gfs2_init_glock_once(void *foo, kmem_cache_t *cachep, unsigned long flags) +{ + struct gfs2_glock *gl = foo; + if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == + SLAB_CTOR_CONSTRUCTOR) { + INIT_HLIST_NODE(&gl->gl_list); + spin_lock_init(&gl->gl_spin); + INIT_LIST_HEAD(&gl->gl_holders); + INIT_LIST_HEAD(&gl->gl_waiters1); + INIT_LIST_HEAD(&gl->gl_waiters2); + INIT_LIST_HEAD(&gl->gl_waiters3); + gl->gl_lvb = NULL; + atomic_set(&gl->gl_lvb_count, 0); + INIT_LIST_HEAD(&gl->gl_reclaim); + INIT_LIST_HEAD(&gl->gl_ail_list); + atomic_set(&gl->gl_ail_count, 0); + } +} + +/** + * 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; + + error = gfs2_sys_init(); + if (error) + return error; + + 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, NULL); + if (!gfs2_glock_cachep) + goto fail; + + gfs2_inode_cachep = kmem_cache_create("gfs2_inode", + sizeof(struct gfs2_inode), + 0, (SLAB_RECLAIM_ACCOUNT| + SLAB_PANIC|SLAB_MEM_SPREAD), + gfs2_init_inode_once, NULL); + if (!gfs2_inode_cachep) + goto fail; + + gfs2_bufdata_cachep = kmem_cache_create("gfs2_bufdata", + sizeof(struct gfs2_bufdata), + 0, 0, NULL, NULL); + if (!gfs2_bufdata_cachep) + goto fail; + + error = register_filesystem(&gfs2_fs_type); + if (error) + goto fail; + + error = register_filesystem(&gfs2meta_fs_type); + if (error) + goto fail_unregister; + + printk("GFS2 (built %s %s) installed\n", __DATE__, __TIME__); + + return 0; + +fail_unregister: + unregister_filesystem(&gfs2_fs_type); +fail: + if (gfs2_bufdata_cachep) + kmem_cache_destroy(gfs2_bufdata_cachep); + + if (gfs2_inode_cachep) + kmem_cache_destroy(gfs2_inode_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_filesystem(&gfs2_fs_type); + unregister_filesystem(&gfs2meta_fs_type); + + kmem_cache_destroy(gfs2_bufdata_cachep); + kmem_cache_destroy(gfs2_inode_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); + |