src/afs/discon.h

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