src/afs/discon.h

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