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Diffstat (limited to 'fs/ocfs2/dlmglue.h')
| -rw-r--r-- | fs/ocfs2/dlmglue.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h new file mode 100644 index 00000000000..8f2d1db2d9e --- /dev/null +++ b/fs/ocfs2/dlmglue.h @@ -0,0 +1,111 @@ +/* -*- 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 + +#define OCFS2_LVB_VERSION 2 + +struct ocfs2_meta_lvb { + __be32 lvb_version; + __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_reserved[3]; +}; + +/* ocfs2_meta_lock_full() and ocfs2_data_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 vote 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); +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, + struct inode *inode); +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_data_lock_full(struct inode *inode, + int write, + int arg_flags); +#define ocfs2_data_lock(inode, write) ocfs2_data_lock_full(inode, write, 0) +int ocfs2_data_lock_with_page(struct inode *inode, + int write, + struct page *page); +void ocfs2_data_unlock(struct inode *inode, + int write); +int ocfs2_rw_lock(struct inode *inode, int write); +void ocfs2_rw_unlock(struct inode *inode, int write); +int ocfs2_meta_lock_full(struct inode *inode, + struct ocfs2_journal_handle *handle, + struct buffer_head **ret_bh, + int ex, + int arg_flags); +int ocfs2_meta_lock_with_page(struct inode *inode, + struct ocfs2_journal_handle *handle, + 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_meta_lock(i, h, b, e) ocfs2_meta_lock_full(i, h, b, e, 0) +void ocfs2_meta_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_rename_lock(struct ocfs2_super *osb); +void ocfs2_rename_unlock(struct ocfs2_super *osb); +void ocfs2_mark_lockres_freeing(struct ocfs2_lock_res *lockres); + +/* for the vote thread */ +void ocfs2_process_blocked_lock(struct ocfs2_super *osb, + struct ocfs2_lock_res *lockres); + +struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void); +void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug); + +/* aids in debugging and tracking lvbs */ +void ocfs2_dump_meta_lvb_info(u64 level, + const char *function, + unsigned int line, + struct ocfs2_lock_res *lockres); +#define mlog_meta_lvb(__level, __lockres) ocfs2_dump_meta_lvb_info(__level, __PRETTY_FUNCTION__, __LINE__, __lockres) + +#endif /* DLMGLUE_H */ |