src/afs/discon.h

   1 #ifndef _DISCON_H
   2 #define _DISCON_H
   3
   4 #ifndef AFS_DISCON_ENV
   5 #define AFS_IS_DISCONNECTED 0
   6 #define AFS_IS_DISCON_RW 0
   7 #define AFS_IN_SYNC 0
   8 #define AFS_DISCON_LOCK()
   9 #define AFS_DISCON_UNLOCK()
  10
  11 #define afs_DisconAddDirty(x, y, z)
  12
  13 #else
  14
  15 #if !defined(inline) && !defined(__GNUC__)
  16 #define inline
  17 #endif
  18
  19 extern afs_int32    afs_is_disconnected;
  20 extern afs_int32    afs_is_discon_rw;
  21 extern afs_int32    afs_in_sync;
  22 extern afs_rwlock_t afs_discon_lock;
  23
  24 extern struct afs_q afs_disconDirty;
  25 extern struct afs_q afs_disconShadow;
  26 extern afs_rwlock_t afs_disconDirtyLock;
  27 extern afs_int32    afs_ConflictPolicy;
  28
  29 extern afs_uint32 afs_DisconVnode; /* XXX: not protected. */
  30
  31 extern int afs_WriteVCacheDiscon(register struct vcache *avc,
  32                                         register struct AFSStoreStatus *astatus,
  33                                         struct vattr *attrs);
  34 extern int afs_ResyncDisconFiles(struct vrequest *areq,
  35                                         afs_ucred_t *acred);
  36 extern void afs_RemoveAllConns(void);
  37 extern void afs_GenFakeFid(struct VenusFid *afid, afs_uint32 avtype,
  38                            int lock);
  39 extern void afs_GenShadowFid(struct VenusFid *afid);
  40 extern void afs_GenDisconStatus(struct vcache *adp,
  41                                         struct vcache *avc,
  42                                         struct VenusFid *afid,
  43                                         struct vattr *attrs,
  44                                         struct vrequest *areq,
  45                                         int file_type);
  46 extern int afs_MakeShadowDir(struct vcache *avc, struct dcache *adc);
  47 extern void afs_DeleteShadowDir(struct vcache *avc);
  48 extern struct dcache *afs_FindDCacheByFid(struct VenusFid *afid);
  49 extern void afs_UpdateStatus(struct vcache *avc,
  50                                         struct VenusFid *afid,
  51                                         struct vrequest *areq,
  52                                         struct AFSFetchStatus *Outsp,
  53                                         struct AFSCallBack *acb,
  54                                         afs_uint32 start);
  55 extern void afs_DisconDiscardAll(afs_ucred_t *);
  56
  57 #define AFS_IS_DISCONNECTED (afs_is_disconnected)
  58 #define AFS_IS_DISCON_RW (afs_is_discon_rw)
  59 #define AFS_IN_SYNC (afs_in_sync)
  60 #define AFS_DISCON_LOCK() ObtainReadLock(&afs_discon_lock)
  61 #define AFS_DISCON_UNLOCK() ReleaseReadLock(&afs_discon_lock)
  62
  63 /* Call with avc lock held */
  64 static inline void afs_DisconAddDirty(struct vcache *avc, int operation, int lock) {
  65     if (!avc->f.ddirty_flags) {
  66         if (lock)
  67             ObtainWriteLock(&afs_xvcache, 702);
  68         ObtainWriteLock(&afs_disconDirtyLock, 703);
  69         QAdd(&afs_disconDirty, &avc->dirtyq);
  70         osi_vnhold(avc, 0);
  71         ReleaseWriteLock(&afs_disconDirtyLock);
  72         if (lock)
  73             ReleaseWriteLock(&afs_xvcache);
  74     }
  75     avc->f.ddirty_flags |= operation;
  76 }
  77
  78 /* Call with avc lock held */
  79 static inline void afs_DisconRemoveDirty(struct vcache *avc) {
  80     ObtainWriteLock(&afs_disconDirtyLock, 704);
  81     QRemove(&avc->dirtyq);
  82     ReleaseWriteLock(&afs_disconDirtyLock);
  83     avc->f.ddirty_flags = 0;
  84     afs_PutVCache(avc);
  85 }
  86 #endif /* AFS_DISCON_ENV */
  87 #endif /* _DISCON_H */