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_DCACHE_H
11 #define OPENAFS_WINNT_AFSD_CM_DCACHE_H 1
13 /* bulk I/O descriptor */
14 typedef struct cm_bulkIO {
15 struct cm_scache *scp; /* typically unheld vnode ptr */
16 struct cm_req *reqp; /* the request ptr */
17 osi_hyper_t offset; /* offset of buffers */
18 long length; /* # of bytes to be transferred */
19 int reserved; /* did we reserve multiple buffers? */
21 /* all of these buffers are held */
22 osi_queueData_t *bufListp; /* list of buffers involved in I/O */
23 osi_queueData_t *bufListEndp; /* list of buffers involved in I/O */
26 extern long cm_StoreMini(cm_scache_t *scp, cm_user_t *userp, cm_req_t *reqp);
28 extern int cm_InitDCache(int newFile, long chunkSize, afs_uint64 nbuffers);
30 extern int cm_HaveBuffer(struct cm_scache *, struct cm_buf *, int haveBufLocked);
32 extern long cm_GetBuffer(struct cm_scache *, struct cm_buf *, int *,
33 struct cm_user *, struct cm_req *);
35 extern long cm_GetData(cm_scache_t *scp, osi_hyper_t *offsetp, char *datap, int data_length,
36 cm_user_t *userp, cm_req_t *reqp);
38 extern afs_int32 cm_CheckFetchRange(cm_scache_t *scp, osi_hyper_t *startBasep,
39 osi_hyper_t *length, cm_user_t *up,
40 cm_req_t *reqp, osi_hyper_t *realBasep);
42 extern long cm_SetupFetchBIOD(cm_scache_t *scp, osi_hyper_t *offsetp,
43 cm_bulkIO_t *biop, cm_user_t *up, cm_req_t *reqp);
45 extern void cm_ReleaseBIOD(cm_bulkIO_t *biop, int isStore, long failed, int scp_locked);
47 extern long cm_SetupStoreBIOD(cm_scache_t *scp, osi_hyper_t *inOffsetp,
48 long inSize, cm_bulkIO_t *biop, cm_user_t *userp, cm_req_t *reqp);
50 extern afs_int32 cm_BkgPrefetch(cm_scache_t *scp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
51 struct cm_user *userp, cm_req_t *reqp);
53 extern afs_int32 cm_BkgStore(cm_scache_t *scp, afs_uint32 p1, afs_uint32 p2, afs_uint32 p3, afs_uint32 p4,
54 struct cm_user *userp, cm_req_t *reqp);
56 extern void cm_ConsiderPrefetch(cm_scache_t *scp, osi_hyper_t *offsetp,
58 cm_user_t *userp, cm_req_t *reqp);
60 extern long cm_ValidateDCache(void);
62 extern long cm_ShutdownDCache(void);
64 extern long cm_BufWrite(void *vscp, osi_hyper_t *offsetp, long length, long flags,
65 cm_user_t *userp, cm_req_t *reqp);
67 #endif /* OPENAFS_WINNT_AFSD_CM_DCACHE_H */