/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * dlmglue.h * * description here * * Copyright (C) 2002, 2004 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 as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * 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. * * You should have received a copy of the GNU General Public * License along with this program; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 021110-1307, USA. */ #ifndef DLMGLUE_H #define DLMGLUE_H #include "dcache.h" #define OCFS2_LVB_VERSION 5 struct ocfs2_meta_lvb { __u8 lvb_version; __u8 lvb_reserved0; __be16 lvb_idynfeatures; __be32 lvb_iclusters; __be32 lvb_iuid; __be32 lvb_igid; __be64 lvb_iatime_packed; __be64 lvb_ictime_packed; __be64 lvb_imtime_packed; __be64 lvb_isize; __be16 lvb_imode; __be16 lvb_inlink; __be32 lvb_iattr; __be32 lvb_igeneration; __be32 lvb_reserved2; }; #define OCFS2_QINFO_LVB_VERSION 1 struct ocfs2_qinfo_lvb { __u8 lvb_version; __u8 lvb_reserved[3]; __be32 lvb_bgrace; __be32 lvb_igrace; __be32 lvb_syncms; __be32 lvb_blocks; __be32 lvb_free_blk; __be32 lvb_free_entry; }; #define OCFS2_ORPHAN_LVB_VERSION 1 struct ocfs2_orphan_scan_lvb { __u8 lvb_version; __u8 lvb_reserved[3]; __be32 lvb_os_seqno; }; /* ocfs2_inode_lock_full() 'arg_flags' flags */ /* don't wait on recovery. */ #define OCFS2_META_LOCK_RECOVERY (0x01) /* Instruct the dlm not to queue ourselves on the other node. */ #define OCFS2_META_LOCK_NOQUEUE (0x02) /* don't block waiting for the downconvert thread, instead return -EAGAIN */ #define OCFS2_LOCK_NONBLOCK (0x04) int ocfs2_dlm_init(struct ocfs2_super *osb); void ocfs2_dlm_shutdown(struct ocfs2_super *osb, int hangup_pending); void ocfs2_lock_res_init_once(struct ocfs2_lock_res *res); void ocfs2_inode_lock_res_init(struct ocfs2_lock_res *res, enum ocfs2_lock_type type, unsigned int generation, struct inode *inode); void ocfs2_dentry_lock_res_init(struct ocfs2_dentry_lock *dl, u64 parent, struct inode *inode); struct ocfs2_file_private; void ocfs2_file_lock_res_init(struct ocfs2_lock_res *lockres, struct ocfs2_file_private *fp); struct ocfs2_mem_dqinfo; void ocfs2_qinfo_lock_res_init(struct ocfs2_lock_res *lockres, struct ocfs2_mem_dqinfo *info); void ocfs2_lock_res_free(struct ocfs2_lock_res *res); int ocfs2_create_new_inode_locks(struct inode *inode); int ocfs2_drop_inode_locks(struct inode *inode); int ocfs2_rw_lock(struct inode *inode, int write); void ocfs2_rw_unlock(struct inode *inode, int write); int ocfs2_open_lock(struct inode *inode); int ocfs2_try_open_lock(struct inode *inode, int write); void ocfs2_open_unlock(struct inode *inode); int ocfs2_inode_lock_atime(struct inode *inode, struct vfsmount *vfsmnt, int *level); int ocfs2_inode_lock_full(struct inode *inode, struct buffer_head **ret_bh, int ex, int arg_flags); int ocfs2_inode_lock_with_page(struct inode *inode, struct buffer_head **ret_bh, int ex, struct page *page); /* 99% of the time we don't want to supply any additional flags -- * those are for very specific cases only. */ #define ocfs2_inode_lock(i, b, e) ocfs2_inode_lock_full(i, b, e, 0) void ocfs2_inode_unlock(struct inode *inode, int ex); int ocfs2_super_lock(struct ocfs2_super *osb, int ex); void ocfs2_super_unlock(struct ocfs2_super *osb, int ex); int ocfs2_orphan_scan_lock(struct ocfs2_super *osb, u32 *seqno); void ocfs2_orphan_scan_unlock(struct ocfs2_super *osb, u32 seqno); int ocfs2_rename_lock(struct ocfs2_super *osb); void ocfs2_rename_unlock(struct ocfs2_super *osb); int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex); void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex); int ocfs2_dentry_lock(struct dentry *dentry, int ex); void ocfs2_dentry_unlock(struct dentry *dentry, int ex); int ocfs2_file_lock(struct file *file, int ex, int trylock); void ocfs2_file_unlock(struct file *file); int ocfs2_qinfo_lock(struct ocfs2_mem_dqinfo *oinfo, int ex); void ocfs2_qinfo_unlock(struct ocfs2_mem_dqinfo *oinfo, int ex); void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); void ocfs2_simple_drop_lockres(struct ocfs2_super *osb, struct ocfs2_lock_res *lockres); /* for the downconvert thread */ void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb); struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); /* To set the locking protocol on module initialization */ void ocfs2_set_locking_protocol(void); #endif /* DLMGLUE_H */