mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-16 01:04:08 +08:00
8dec98edfe
refcount tree lock resource is used to protect refcount tree read/write among multiple nodes. Signed-off-by: Tao Ma <tao.ma@oracle.com>
129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* ocfs2_lockid.h
|
|
*
|
|
* Defines OCFS2 lockid bits.
|
|
*
|
|
* Copyright (C) 2002, 2005 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 OCFS2_LOCKID_H
|
|
#define OCFS2_LOCKID_H
|
|
|
|
/* lock ids are made up in the following manner:
|
|
* name[0] --> type
|
|
* name[1-6] --> 6 pad characters, reserved for now
|
|
* name[7-22] --> block number, expressed in hex as 16 chars
|
|
* name[23-30] --> i_generation, expressed in hex 8 chars
|
|
* name[31] --> '\0' */
|
|
#define OCFS2_LOCK_ID_MAX_LEN 32
|
|
#define OCFS2_LOCK_ID_PAD "000000"
|
|
|
|
#define OCFS2_DENTRY_LOCK_INO_START 18
|
|
|
|
enum ocfs2_lock_type {
|
|
OCFS2_LOCK_TYPE_META = 0,
|
|
OCFS2_LOCK_TYPE_DATA,
|
|
OCFS2_LOCK_TYPE_SUPER,
|
|
OCFS2_LOCK_TYPE_RENAME,
|
|
OCFS2_LOCK_TYPE_RW,
|
|
OCFS2_LOCK_TYPE_DENTRY,
|
|
OCFS2_LOCK_TYPE_OPEN,
|
|
OCFS2_LOCK_TYPE_FLOCK,
|
|
OCFS2_LOCK_TYPE_QINFO,
|
|
OCFS2_LOCK_TYPE_NFS_SYNC,
|
|
OCFS2_LOCK_TYPE_ORPHAN_SCAN,
|
|
OCFS2_LOCK_TYPE_REFCOUNT,
|
|
OCFS2_NUM_LOCK_TYPES
|
|
};
|
|
|
|
static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
|
|
{
|
|
char c;
|
|
switch (type) {
|
|
case OCFS2_LOCK_TYPE_META:
|
|
c = 'M';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_DATA:
|
|
c = 'D';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_SUPER:
|
|
c = 'S';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_RENAME:
|
|
c = 'R';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_RW:
|
|
c = 'W';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_DENTRY:
|
|
c = 'N';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_OPEN:
|
|
c = 'O';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_FLOCK:
|
|
c = 'F';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_QINFO:
|
|
c = 'Q';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_NFS_SYNC:
|
|
c = 'Y';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_ORPHAN_SCAN:
|
|
c = 'P';
|
|
break;
|
|
case OCFS2_LOCK_TYPE_REFCOUNT:
|
|
c = 'T';
|
|
break;
|
|
default:
|
|
c = '\0';
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
static char *ocfs2_lock_type_strings[] = {
|
|
[OCFS2_LOCK_TYPE_META] = "Meta",
|
|
[OCFS2_LOCK_TYPE_DATA] = "Data",
|
|
[OCFS2_LOCK_TYPE_SUPER] = "Super",
|
|
[OCFS2_LOCK_TYPE_RENAME] = "Rename",
|
|
/* Need to differntiate from [R]ename.. serializing writes is the
|
|
* important job it does, anyway. */
|
|
[OCFS2_LOCK_TYPE_RW] = "Write/Read",
|
|
[OCFS2_LOCK_TYPE_DENTRY] = "Dentry",
|
|
[OCFS2_LOCK_TYPE_OPEN] = "Open",
|
|
[OCFS2_LOCK_TYPE_FLOCK] = "Flock",
|
|
[OCFS2_LOCK_TYPE_QINFO] = "Quota",
|
|
[OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync",
|
|
[OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan",
|
|
[OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount",
|
|
};
|
|
|
|
static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)
|
|
{
|
|
#ifdef __KERNEL__
|
|
BUG_ON(type >= OCFS2_NUM_LOCK_TYPES);
|
|
#endif
|
|
return ocfs2_lock_type_strings[type];
|
|
}
|
|
|
|
#endif /* OCFS2_LOCKID_H */
|