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 #include <afsconfig.h>
11 #include "afs/param.h"
14 #include "afs/sysincludes.h" /* Standard vendor system headers */
15 #include "afsincludes.h" /* Afs-based standard headers */
16 #include "afs/afs_stats.h" /* afs statistics */
19 int afs_osicred_initialized
= 0;
20 afs_ucred_t afs_osi_cred
;
21 extern struct osi_dev cacheDev
;
22 extern struct vfs
*afs_cacheVfsp
;
26 osi_UFSOpen(afs_dcache_id_t
*ainode
)
29 struct osi_file
*afile
= NULL
;
30 struct vnode
*vp
= NULL
;
31 extern int cacheDiskType
;
34 AFS_STATCNT(osi_UFSOpen
);
35 if (cacheDiskType
!= AFS_FCACHE_TYPE_UFS
) {
36 osi_Panic("UFSOpen called for non-UFS cache\n");
38 if (!afs_osicred_initialized
) {
39 /* valid for alpha_osf, SunOS, Ultrix */
40 memset(&afs_osi_cred
, 0, sizeof(afs_ucred_t
));
41 crhold(&afs_osi_cred
); /* don't let it evaporate, since it is static */
42 afs_osicred_initialized
= 1;
44 afile
= osi_AllocSmallSpace(sizeof(struct osi_file
));
47 ip
= (struct inode
*)igetinode((dev_t
) cacheDev
.dev
, afs_cacheVfsp
,
48 (ino_t
) ainode
->ufs
, &vp
, &dummy
);
51 osi_FreeSmallSpace(afile
);
52 osi_Panic("UFSOpen: igetinode failed");
54 afile
->vnode
= vp
; /* Save the vnode pointer for the inode ip; also ip is already prele'ed in igetinode */
55 afile
->size
= VTOI(afile
->vnode
)->i_size
;
57 afile
->proc
= (int (*)())0;
62 afs_osi_Stat(struct osi_file
*afile
, struct osi_stat
*astat
)
66 AFS_STATCNT(osi_Stat
);
68 code
= VNOP_GETATTR(afile
->vnode
, &tvattr
, &afs_osi_cred
);
71 astat
->size
= tvattr
.va_size
;
72 astat
->mtime
= tvattr
.va_mtime
.tv_sec
;
73 astat
->atime
= tvattr
.va_atime
.tv_sec
;
79 osi_UFSClose(struct osi_file
*afile
)
81 AFS_STATCNT(osi_Close
);
83 /* AIX writes entire data regions at a time when dumping core. We've
84 * seen a 26M write go through the system. When this happens, we run
85 * out of available pages. So, we'll flush the vnode's vm if we're short
90 if (afile
->vnode
->v_gnode
->gn_seg
) {
91 /* 524287 is the max number of pages for a file. See test in
94 code
= vm_writep(afile
->vnode
->v_gnode
->gn_seg
, 0, 524287);
97 AFS_RELE(afile
->vnode
);
100 osi_FreeSmallSpace(afile
);
105 osi_UFSTruncate(struct osi_file
*afile
, afs_int32 asize
)
107 afs_ucred_t
*oldCred
;
110 struct osi_stat tstat
;
111 afs_int32 mode
= FWRITE
| FSYNC
;
112 AFS_STATCNT(osi_Truncate
);
114 /* This routine only shrinks files, and most systems
115 * have very slow truncates, even when the file is already
116 * small enough. Check now and save some time.
118 code
= afs_osi_Stat(afile
, &tstat
);
119 if (code
|| tstat
.size
<= asize
)
122 * If we're truncating an unopened file to a non-zero length,
123 * we need to bind it to a vm segment
124 * Note that that the binding will actually happen inside
125 * jfs by xix_ftrunc; setting mode to 0 will enable that.
127 if (asize
&& !VTOGP(afile
->vnode
)->gn_seg
)
130 code
= VNOP_FTRUNC(afile
->vnode
, mode
, asize
, (caddr_t
) 0, &afs_osi_cred
);
136 osi_DisableAtimes(struct vnode
*avp
)
138 struct inode
*ip
= VTOIP(avp
);
143 /* Generic read interface */
145 afs_osi_Read(struct osi_file
*afile
, int offset
, void *aptr
,
148 afs_ucred_t
*oldCred
;
152 AFS_STATCNT(osi_Read
);
155 * If the osi_file passed in is NULL, panic only if AFS is not shutting
156 * down. No point in crashing when we are already shutting down
159 if (afs_shuttingdown
== AFS_RUNNING
)
160 osi_Panic("osi_Read called with null param");
166 afile
->offset
= offset
;
168 /* Note the difference in the way the afile->offset is passed (see comments in gop_rdwr() in afs_aix_subr.c for comments) */
170 #ifdef AFS_64BIT_KERNEL
172 gop_rdwr(UIO_READ
, afile
->vnode
, (caddr_t
) aptr
, asize
,
173 &afile
->offset
, AFS_UIOSYS
, NULL
, &resid
);
176 gop_rdwr(UIO_READ
, afile
->vnode
, (caddr_t
) aptr
, asize
,
177 (off_t
) & afile
->offset
, AFS_UIOSYS
, NULL
, &resid
);
181 code
= asize
- resid
;
182 afile
->offset
+= code
;
183 osi_DisableAtimes(afile
->vnode
);
185 afs_Trace2(afs_iclSetp
, CM_TRACE_READFAILED
, ICL_TYPE_INT32
, resid
,
186 ICL_TYPE_INT32
, code
);
188 * To handle periodic low-level EFAULT failures that we've seen with the
189 * Weitek chip; in all observed failed cases a second read succeeded.
191 if ((code
== EFAULT
) && (cnt1
++ < 5)) {
192 afs_stats_cmperf
.osiread_efaults
++;
203 /* Generic write interface */
205 afs_osi_Write(struct osi_file
*afile
, afs_int32 offset
, void *aptr
,
208 afs_ucred_t
*oldCred
;
211 AFS_STATCNT(osi_Write
);
213 osi_Panic("afs_osi_Write called with null param");
215 afile
->offset
= offset
;
216 /* Note the difference in the way the afile->offset is passed (see comments in gop_rdwr() in afs_aix_subr.c for comments) */
218 #ifdef AFS_64BIT_KERNEL
220 gop_rdwr(UIO_WRITE
, afile
->vnode
, (caddr_t
) aptr
, asize
,
221 &afile
->offset
, AFS_UIOSYS
, NULL
, &resid
);
224 gop_rdwr(UIO_WRITE
, afile
->vnode
, (caddr_t
) aptr
, asize
,
225 (off_t
) & afile
->offset
, AFS_UIOSYS
, NULL
, &resid
);
230 afs_Trace3(afs_iclSetp
, CM_TRACE_WRITEFAILED
, ICL_TYPE_INT32
,
231 asize
, ICL_TYPE_INT32
, resid
, ICL_TYPE_INT32
, code
);
232 code
= asize
- resid
;
233 afile
->offset
+= code
;
235 afs_Trace3(afs_iclSetp
, CM_TRACE_WRITEFAILED
, ICL_TYPE_INT32
, asize
,
236 ICL_TYPE_INT32
, resid
, ICL_TYPE_INT32
, code
);
245 (*afile
->proc
) (afile
, code
);
251 /* This work should be handled by physstrat in ca/machdep.c.
252 This routine written from the RT NFS port strategy routine.
253 It has been generalized a bit, but should still be pretty clear. */
255 afs_osi_MapStrategy(int (*aproc
) (), struct buf
*bp
)
257 afs_int32 returnCode
;
259 AFS_STATCNT(osi_MapStrategy
);
260 returnCode
= (*aproc
) (bp
);
268 shutdown_osifile(void)
270 AFS_STATCNT(shutdown_osifile
);
271 if (afs_cold_shutdown
) {
272 afs_osicred_initialized
= 0;