220 lines
9.3 KiB
C
220 lines
9.3 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
|
|
* vim: noexpandtab sw=8 ts=8 sts=0:
|
|
*
|
|
* dlmapi.h
|
|
*
|
|
* externally exported dlm interfaces
|
|
*
|
|
* Copyright (C) 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 DLMAPI_H
|
|
#define DLMAPI_H
|
|
|
|
struct dlm_lock;
|
|
struct dlm_ctxt;
|
|
|
|
/* NOTE: changes made to this enum should be reflected in dlmdebug.c */
|
|
enum dlm_status {
|
|
DLM_NORMAL = 0, /* 0: request in progress */
|
|
DLM_GRANTED, /* 1: request granted */
|
|
DLM_DENIED, /* 2: request denied */
|
|
DLM_DENIED_NOLOCKS, /* 3: request denied, out of system resources */
|
|
DLM_WORKING, /* 4: async request in progress */
|
|
DLM_BLOCKED, /* 5: lock request blocked */
|
|
DLM_BLOCKED_ORPHAN, /* 6: lock request blocked by a orphan lock*/
|
|
DLM_DENIED_GRACE_PERIOD, /* 7: topological change in progress */
|
|
DLM_SYSERR, /* 8: system error */
|
|
DLM_NOSUPPORT, /* 9: unsupported */
|
|
DLM_CANCELGRANT, /* 10: can't cancel convert: already granted */
|
|
DLM_IVLOCKID, /* 11: bad lockid */
|
|
DLM_SYNC, /* 12: synchronous request granted */
|
|
DLM_BADTYPE, /* 13: bad resource type */
|
|
DLM_BADRESOURCE, /* 14: bad resource handle */
|
|
DLM_MAXHANDLES, /* 15: no more resource handles */
|
|
DLM_NOCLINFO, /* 16: can't contact cluster manager */
|
|
DLM_NOLOCKMGR, /* 17: can't contact lock manager */
|
|
DLM_NOPURGED, /* 18: can't contact purge daemon */
|
|
DLM_BADARGS, /* 19: bad api args */
|
|
DLM_VOID, /* 20: no status */
|
|
DLM_NOTQUEUED, /* 21: NOQUEUE was specified and request failed */
|
|
DLM_IVBUFLEN, /* 22: invalid resource name length */
|
|
DLM_CVTUNGRANT, /* 23: attempted to convert ungranted lock */
|
|
DLM_BADPARAM, /* 24: invalid lock mode specified */
|
|
DLM_VALNOTVALID, /* 25: value block has been invalidated */
|
|
DLM_REJECTED, /* 26: request rejected, unrecognized client */
|
|
DLM_ABORT, /* 27: blocked lock request cancelled */
|
|
DLM_CANCEL, /* 28: conversion request cancelled */
|
|
DLM_IVRESHANDLE, /* 29: invalid resource handle */
|
|
DLM_DEADLOCK, /* 30: deadlock recovery refused this request */
|
|
DLM_DENIED_NOASTS, /* 31: failed to allocate AST */
|
|
DLM_FORWARD, /* 32: request must wait for primary's response */
|
|
DLM_TIMEOUT, /* 33: timeout value for lock has expired */
|
|
DLM_IVGROUPID, /* 34: invalid group specification */
|
|
DLM_VERS_CONFLICT, /* 35: version conflicts prevent request handling */
|
|
DLM_BAD_DEVICE_PATH, /* 36: Locks device does not exist or path wrong */
|
|
DLM_NO_DEVICE_PERMISSION, /* 37: Client has insufficient pers for device */
|
|
DLM_NO_CONTROL_DEVICE, /* 38: Cannot set options on opened device */
|
|
|
|
DLM_RECOVERING, /* 39: extension, allows caller to fail a lock
|
|
request if it is being recovered */
|
|
DLM_MIGRATING, /* 40: extension, allows caller to fail a lock
|
|
request if it is being migrated */
|
|
DLM_MAXSTATS, /* 41: upper limit for return code validation */
|
|
};
|
|
|
|
/* for pretty-printing dlm_status error messages */
|
|
const char *dlm_errmsg(enum dlm_status err);
|
|
/* for pretty-printing dlm_status error names */
|
|
const char *dlm_errname(enum dlm_status err);
|
|
|
|
/* Eventually the DLM will use standard errno values, but in the
|
|
* meantime this lets us track dlm errors as they bubble up. When we
|
|
* bring its error reporting into line with the rest of the stack,
|
|
* these can just be replaced with calls to mlog_errno. */
|
|
#define dlm_error(st) do { \
|
|
if ((st) != DLM_RECOVERING && \
|
|
(st) != DLM_MIGRATING && \
|
|
(st) != DLM_FORWARD) \
|
|
mlog(ML_ERROR, "dlm status = %s\n", dlm_errname((st))); \
|
|
} while (0)
|
|
|
|
#define DLM_LKSB_UNUSED1 0x01
|
|
#define DLM_LKSB_PUT_LVB 0x02
|
|
#define DLM_LKSB_GET_LVB 0x04
|
|
#define DLM_LKSB_UNUSED2 0x08
|
|
#define DLM_LKSB_UNUSED3 0x10
|
|
#define DLM_LKSB_UNUSED4 0x20
|
|
#define DLM_LKSB_UNUSED5 0x40
|
|
#define DLM_LKSB_UNUSED6 0x80
|
|
|
|
#define DLM_LVB_LEN 64
|
|
|
|
/* Callers are only allowed access to the lvb and status members of
|
|
* this struct. */
|
|
struct dlm_lockstatus {
|
|
enum dlm_status status;
|
|
u32 flags;
|
|
struct dlm_lock *lockid;
|
|
char lvb[DLM_LVB_LEN];
|
|
};
|
|
|
|
/* Valid lock modes. */
|
|
#define LKM_IVMODE (-1) /* invalid mode */
|
|
#define LKM_NLMODE 0 /* null lock */
|
|
#define LKM_CRMODE 1 /* concurrent read unsupported */
|
|
#define LKM_CWMODE 2 /* concurrent write unsupported */
|
|
#define LKM_PRMODE 3 /* protected read */
|
|
#define LKM_PWMODE 4 /* protected write unsupported */
|
|
#define LKM_EXMODE 5 /* exclusive */
|
|
#define LKM_MAXMODE 5
|
|
#define LKM_MODEMASK 0xff
|
|
|
|
/* Flags passed to dlmlock and dlmunlock:
|
|
* reserved: flags used by the "real" dlm
|
|
* only a few are supported by this dlm
|
|
* (U) = unsupported by ocfs2 dlm */
|
|
#define LKM_ORPHAN 0x00000010 /* this lock is orphanable (U) */
|
|
#define LKM_PARENTABLE 0x00000020 /* this lock was orphaned (U) */
|
|
#define LKM_BLOCK 0x00000040 /* blocking lock request (U) */
|
|
#define LKM_LOCAL 0x00000080 /* local lock request */
|
|
#define LKM_VALBLK 0x00000100 /* lock value block request */
|
|
#define LKM_NOQUEUE 0x00000200 /* non blocking request */
|
|
#define LKM_CONVERT 0x00000400 /* conversion request */
|
|
#define LKM_NODLCKWT 0x00000800 /* this lock wont deadlock (U) */
|
|
#define LKM_UNLOCK 0x00001000 /* deallocate this lock */
|
|
#define LKM_CANCEL 0x00002000 /* cancel conversion request */
|
|
#define LKM_DEQALL 0x00004000 /* remove all locks held by proc (U) */
|
|
#define LKM_INVVALBLK 0x00008000 /* invalidate lock value block */
|
|
#define LKM_SYNCSTS 0x00010000 /* return synchronous status if poss (U) */
|
|
#define LKM_TIMEOUT 0x00020000 /* lock request contains timeout (U) */
|
|
#define LKM_SNGLDLCK 0x00040000 /* request can self-deadlock (U) */
|
|
#define LKM_FINDLOCAL 0x00080000 /* find local lock request (U) */
|
|
#define LKM_PROC_OWNED 0x00100000 /* owned by process, not group (U) */
|
|
#define LKM_XID 0x00200000 /* use transaction id for deadlock (U) */
|
|
#define LKM_XID_CONFLICT 0x00400000 /* do not allow lock inheritance (U) */
|
|
#define LKM_FORCE 0x00800000 /* force unlock flag */
|
|
#define LKM_REVVALBLK 0x01000000 /* temporary solution: re-validate
|
|
lock value block (U) */
|
|
/* unused */
|
|
#define LKM_UNUSED1 0x00000001 /* unused */
|
|
#define LKM_UNUSED2 0x00000002 /* unused */
|
|
#define LKM_UNUSED3 0x00000004 /* unused */
|
|
#define LKM_UNUSED4 0x00000008 /* unused */
|
|
#define LKM_UNUSED5 0x02000000 /* unused */
|
|
#define LKM_UNUSED6 0x04000000 /* unused */
|
|
#define LKM_UNUSED7 0x08000000 /* unused */
|
|
|
|
/* ocfs2 extensions: internal only
|
|
* should never be used by caller */
|
|
#define LKM_MIGRATION 0x10000000 /* extension: lockres is to be migrated
|
|
to another node */
|
|
#define LKM_PUT_LVB 0x20000000 /* extension: lvb is being passed
|
|
should be applied to lockres */
|
|
#define LKM_GET_LVB 0x40000000 /* extension: lvb should be copied
|
|
from lockres when lock is granted */
|
|
#define LKM_RECOVERY 0x80000000 /* extension: flag for recovery lock
|
|
used to avoid recovery rwsem */
|
|
|
|
|
|
typedef void (dlm_astlockfunc_t)(void *);
|
|
typedef void (dlm_bastlockfunc_t)(void *, int);
|
|
typedef void (dlm_astunlockfunc_t)(void *, enum dlm_status);
|
|
|
|
enum dlm_status dlmlock(struct dlm_ctxt *dlm,
|
|
int mode,
|
|
struct dlm_lockstatus *lksb,
|
|
int flags,
|
|
const char *name,
|
|
int namelen,
|
|
dlm_astlockfunc_t *ast,
|
|
void *data,
|
|
dlm_bastlockfunc_t *bast);
|
|
|
|
enum dlm_status dlmunlock(struct dlm_ctxt *dlm,
|
|
struct dlm_lockstatus *lksb,
|
|
int flags,
|
|
dlm_astunlockfunc_t *unlockast,
|
|
void *data);
|
|
|
|
struct dlm_protocol_version {
|
|
u8 pv_major;
|
|
u8 pv_minor;
|
|
};
|
|
struct dlm_ctxt * dlm_register_domain(const char *domain, u32 key,
|
|
struct dlm_protocol_version *fs_proto);
|
|
|
|
void dlm_unregister_domain(struct dlm_ctxt *dlm);
|
|
|
|
void dlm_print_one_lock(struct dlm_lock *lockid);
|
|
|
|
typedef void (dlm_eviction_func)(int, void *);
|
|
struct dlm_eviction_cb {
|
|
struct list_head ec_item;
|
|
dlm_eviction_func *ec_func;
|
|
void *ec_data;
|
|
};
|
|
void dlm_setup_eviction_cb(struct dlm_eviction_cb *cb,
|
|
dlm_eviction_func *f,
|
|
void *data);
|
|
void dlm_register_eviction_cb(struct dlm_ctxt *dlm,
|
|
struct dlm_eviction_cb *cb);
|
|
void dlm_unregister_eviction_cb(struct dlm_eviction_cb *cb);
|
|
|
|
#endif /* DLMAPI_H */
|