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Diffstat (limited to 'fs/ocfs2/dlmglue.h')
| -rw-r--r-- | fs/ocfs2/dlmglue.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h new file mode 100644 index 000000000..4ec1c828f --- /dev/null +++ b/fs/ocfs2/dlmglue.h @@ -0,0 +1,225 @@ +/* -*- 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; +}; + +#define OCFS2_TRIMFS_LVB_VERSION 1 + +struct ocfs2_trim_fs_lvb { + __u8 lvb_version; + __u8 lvb_success; + __u8 lvb_reserved[2]; + __be32 lvb_nodenum; + __be64 lvb_start; + __be64 lvb_len; + __be64 lvb_minlen; + __be64 lvb_trimlen; +}; + +struct ocfs2_trim_fs_info { + u8 tf_valid; /* lvb is valid, or not */ + u8 tf_success; /* trim is successful, or not */ + u32 tf_nodenum; /* osb node number */ + u64 tf_start; /* trim start offset in clusters */ + u64 tf_len; /* trim end offset in clusters */ + u64 tf_minlen; /* trim minimum contiguous free clusters */ + u64 tf_trimlen; /* trimmed length in bytes */ +}; + +struct ocfs2_lock_holder { + struct list_head oh_list; + struct pid *oh_owner_pid; + int oh_ex; +}; + +/* 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) +/* just get back disk inode bh if we've got cluster lock. */ +#define OCFS2_META_LOCK_GETBH (0x08) + +/* Locking subclasses of inode cluster lock */ +enum { + OI_LS_NORMAL = 0, + OI_LS_PARENT, + OI_LS_RENAME1, + OI_LS_RENAME2, + OI_LS_REFLINK_TARGET, +}; + +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_refcount_lock_res_init(struct ocfs2_lock_res *lockres, + struct ocfs2_super *osb, u64 ref_blkno, + unsigned int generation); +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); +int ocfs2_try_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 wait); +int ocfs2_inode_lock_full_nested(struct inode *inode, + struct buffer_head **ret_bh, + int ex, + int arg_flags, + int subclass); +int ocfs2_inode_lock_with_page(struct inode *inode, + struct buffer_head **ret_bh, + int ex, + struct page *page); +/* Variants without special locking class or flags */ +#define ocfs2_inode_lock_full(i, r, e, f)\ + ocfs2_inode_lock_full_nested(i, r, e, f, OI_LS_NORMAL) +#define ocfs2_inode_lock_nested(i, b, e, s)\ + ocfs2_inode_lock_full_nested(i, b, e, 0, s) +/* 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_nested(i, b, e, 0, OI_LS_NORMAL) +#define ocfs2_try_inode_lock(i, b, e)\ + ocfs2_inode_lock_full_nested(i, b, e, OCFS2_META_LOCK_NOQUEUE,\ + OI_LS_NORMAL) +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); +void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb); +void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb); +int ocfs2_trim_fs_lock(struct ocfs2_super *osb, + struct ocfs2_trim_fs_info *info, int trylock); +void ocfs2_trim_fs_unlock(struct ocfs2_super *osb, + struct ocfs2_trim_fs_info *info); +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); +struct ocfs2_refcount_tree; +int ocfs2_refcount_lock(struct ocfs2_refcount_tree *ref_tree, int ex); +void ocfs2_refcount_unlock(struct ocfs2_refcount_tree *ref_tree, int ex); + + +void ocfs2_mark_lockres_freeing(struct ocfs2_super *osb, + 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); + +/* The _tracker pair is used to avoid cluster recursive locking */ +int ocfs2_inode_lock_tracker(struct inode *inode, + struct buffer_head **ret_bh, + int ex, + struct ocfs2_lock_holder *oh); +void ocfs2_inode_unlock_tracker(struct inode *inode, + int ex, + struct ocfs2_lock_holder *oh, + int had_lock); + +#endif /* DLMGLUE_H */ |