2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
10 #ifndef OPENAFS_WINNT_AFSD_CM_VOLUME_H
11 #define OPENAFS_WINNT_AFSD_CM_VOLUME_H 1
13 #include <opr/jhash.h>
15 #define VL_MAXNAMELEN 65
17 #define CM_VOLUME_MAGIC ('V' | 'O' <<8 | 'L'<<16 | 'M'<<24)
23 typedef struct cm_vol_state {
24 struct cm_volume *nextp; /* volumeIDHashTable; by cm_volumeLock */
25 afs_uint32 ID; /* by rw */
26 struct cm_fid dotdotFid; /* parent of volume root */
27 cm_serverRef_t *serversp; /* by cm_serverLock */
28 enum volstatus state; /* by rw */
29 afs_uint32 flags; /* by rw */
30 afs_uint32 qflags; /* by cm_volumeLock */
33 /* RWVOL, ROVOL, BACKVOL are defined in cm.h */
34 #define NUM_VOL_TYPES 3
36 typedef struct cm_volume {
37 osi_queue_t q; /* LRU queue; cm_volumeLock */
38 afs_uint32 qflags; /* by cm_volumeLock */
40 struct cm_volume *allNextp; /* allVolumes; by cm_volumeLock */
41 struct cm_volume *nameNextp; /* volumeNameHashTable; by cm_volumeLock */
42 cm_cell_t *cellp; /* never changes */
43 char namep[VL_MAXNAMELEN]; /* name of the normal volume - assigned during allocation; */
44 /* by cm_volumeLock */
45 struct cm_vol_state vol[NUM_VOL_TYPES]; /* by cm_volumeLock */
47 afs_uint32 flags; /* by rw */
48 afs_int32 refCount; /* by Interlocked operations */
49 struct cm_server *cbServerpRO; /* server granting RO callback; by cm_scacheLock */
50 time_t cbExpiresRO; /* latest RO expiration time; by cm_scacheLock */
51 time_t creationDateRO; /* latest volume creation date; 0 if unknown; by cm_scacheLock */
52 time_t lastUpdateTime; /* most recent volume location update cm_volumeLock */
55 #define CM_VOLUMEFLAG_RESET 1 /* reload this info on next use */
56 #define CM_VOLUMEFLAG_UPDATING_VL 8
57 #define CM_VOLUMEFLAG_DFS_VOLUME 16
58 #define CM_VOLUMEFLAG_NOEXIST 32
60 #define CM_VOLUME_QFLAG_IN_HASH 1
61 #define CM_VOLUME_QFLAG_IN_LRU_QUEUE 2
63 typedef struct cm_volumeRef {
64 struct cm_volumeRef * next;
68 extern void cm_InitVolume(int newFile, long maxVols);
70 extern long cm_FindVolumeByName(struct cm_cell *cellp, char *volNamep,
71 struct cm_user *userp, struct cm_req *reqp,
72 afs_uint32 flags, cm_volume_t **outVolpp);
74 extern long cm_FindVolumeByID(struct cm_cell *cellp, afs_uint32 volumeID,
75 cm_user_t *userp, cm_req_t *reqp,
76 afs_uint32 flags, cm_volume_t **outVolpp);
78 #define CM_GETVOL_FLAG_CREATE 1
79 #define CM_GETVOL_FLAG_NO_LRU_UPDATE 2
80 #define CM_GETVOL_FLAG_NO_RESET 4
81 #define CM_GETVOL_FLAG_IGNORE_LINKED_CELL 8
83 /* hash define. Must not include the cell, since the callback revocation code
84 * doesn't necessarily know the cell in the case of a multihomed server
85 * contacting us from a mystery address.
88 #define CM_VOLUME_ID_HASH(volid) \
89 (opr_jhash_int((volid), 0) & (cm_data.volumeHashTableSize - 1))
91 #define CM_VOLUME_NAME_HASH(name) (SDBMHash(name) % cm_data.volumeHashTableSize)
93 extern afs_uint32 SDBMHash(const char *);
95 extern void cm_GetVolume(cm_volume_t *volp);
97 extern cm_volume_t *cm_GetVolumeByFID(cm_fid_t *);
99 extern void cm_PutVolume(cm_volume_t *volp);
101 extern long cm_GetROVolumeID(cm_volume_t *volp);
103 extern long cm_ForceUpdateVolume(struct cm_fid *fidp, cm_user_t *userp,
106 extern cm_serverRef_t **cm_GetVolServers(cm_volume_t *volp, afs_uint32 volume,
107 cm_user_t *userp, cm_req_t *reqp);
109 extern void cm_ChangeRankVolume(cm_server_t *tsp);
111 extern void cm_RefreshVolumes(int lifetime);
113 extern long cm_ValidateVolume(void);
115 extern long cm_ShutdownVolume(void);
117 extern int cm_DumpVolumes(FILE *outputFile, char *cookie, int lock);
119 extern int cm_VolNameIsID(char *aname);
121 extern void cm_RemoveVolumeFromNameHashTable(cm_volume_t * volp);
123 extern void cm_RemoveVolumeFromIDHashTable(cm_volume_t * volp, afs_uint32 volType);
125 extern void cm_AddVolumeToNameHashTable(cm_volume_t * volp);
127 extern void cm_AddVolumeToIDHashTable(cm_volume_t * volp, afs_uint32 volType);
129 extern void cm_AdjustVolumeLRU(cm_volume_t *volp);
131 extern void cm_MoveVolumeToLRULast(cm_volume_t *volp);
133 extern void cm_RemoveVolumeFromLRU(cm_volume_t *volp);
135 extern void cm_CheckOfflineVolumes(void);
137 extern long cm_CheckOfflineVolume(cm_volume_t *volp, afs_uint32 volID);
139 extern void cm_CheckOfflineVolumeState(cm_volume_t *volp, cm_vol_state_t *statep,
140 afs_uint32 volID, afs_uint32 *onlinep,
141 afs_uint32 *volumeUpdatedp);
143 extern void cm_UpdateVolumeStatus(cm_volume_t *volp, afs_uint32 volID);
145 extern void cm_VolumeStatusNotification(cm_volume_t * volp, afs_uint32 volID, enum volstatus oldState, enum volstatus newState);
147 extern enum volstatus cm_GetVolumeStatus(cm_volume_t *volp, afs_uint32 volID);
149 extern void cm_VolumeRenewROCallbacks(void);
151 extern cm_vol_state_t * cm_VolumeStateByType(cm_volume_t *volp, afs_uint32 type);
153 extern cm_vol_state_t * cm_VolumeStateByID(cm_volume_t *volp, afs_uint32 id);
155 extern cm_vol_state_t * cm_VolumeStateByName(cm_volume_t *volp, char *volname);
157 extern afs_int32 cm_VolumeType(cm_volume_t *volp, afs_uint32 id);
159 extern osi_rwlock_t cm_volumeLock;
160 #endif /* OPENAFS_WINNT_AFSD_CM_VOLUME_H */