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"
15 #include "../afs/sysincludes.h" /* Standard vendor system headers */
16 #include "../afs/afsincludes.h" /* Afs-based standard headers */
17 #include "../afs/afs_stats.h" /* afs statistics */
18 #include "../afs/osi_inode.h" /* igetinode() */
21 int afs_osicred_initialized=0;
22 struct AFS_UCRED afs_osi_cred;
23 afs_lock_t afs_xosi; /* lock is for tvattr */
24 extern struct osi_dev cacheDev;
25 extern struct vfs *afs_cacheVfsp;
28 void *osi_UFSOpen(ainode)
32 register struct osi_file *afile = NULL;
33 extern int cacheDiskType;
36 AFS_STATCNT(osi_UFSOpen);
37 if(cacheDiskType != AFS_FCACHE_TYPE_UFS) {
38 osi_Panic("UFSOpen called for non-UFS cache\n");
40 if (!afs_osicred_initialized) {
41 /* valid for alpha_osf, SunOS, Ultrix */
42 memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED));
43 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
44 afs_osicred_initialized = 1;
46 afile = (struct osi_file *) osi_AllocSmallSpace(sizeof(struct osi_file));
49 ip = (struct inode *) igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, (ino_t)ainode,&dummy);
52 osi_FreeSmallSpace(afile);
53 osi_Panic("UFSOpen: igetinode failed");
56 afile->vnode = ITOV(ip);
57 afile->size = VTOI(afile->vnode)->i_size;
59 afile->proc = (int (*)()) 0;
60 afile->inum = ainode; /* for hint validity checking */
64 afs_osi_Stat(afile, astat)
65 register struct osi_file *afile;
66 register struct osi_stat *astat; {
67 register afs_int32 code;
69 AFS_STATCNT(osi_Stat);
70 MObtainWriteLock(&afs_xosi,320);
72 code = VOP_GETATTR(afile->vnode, &tvattr, &afs_osi_cred, VSYNC);
75 astat->size = tvattr.va_size;
76 astat->blksize = tvattr.va_blocksize;
77 astat->mtime = tvattr.va_mtime.tv_sec;
78 astat->atime = tvattr.va_atime.tv_sec;
80 MReleaseWriteLock(&afs_xosi);
85 register struct osi_file *afile;
87 AFS_STATCNT(osi_Close);
89 AFS_RELE(afile->vnode);
92 osi_FreeSmallSpace(afile);
96 osi_UFSTruncate(afile, asize)
97 register struct osi_file *afile;
99 struct AFS_UCRED *oldCred;
101 register afs_int32 code;
102 struct osi_stat tstat;
103 AFS_STATCNT(osi_Truncate);
105 /* This routine only shrinks files, and most systems
106 * have very slow truncates, even when the file is already
107 * small enough. Check now and save some time.
109 code = afs_osi_Stat(afile, &tstat);
110 if (code || tstat.size <= asize) return code;
111 MObtainWriteLock(&afs_xosi,321);
113 /* note that this credential swapping stuff is only necessary because
114 of ufs's references directly to u.u_cred instead of to
115 credentials parameter. Probably should fix ufs some day. */
116 oldCred = p_cred(u.u_procp);
117 set_p_cred(u.u_procp, &afs_osi_cred);
118 tvattr.va_size = asize;
120 code = VOP_SETATTR(afile->vnode, &tvattr, &afs_osi_cred, 0);
122 set_p_cred(u.u_procp, oldCred); /* restore */
123 MReleaseWriteLock(&afs_xosi);
127 void osi_DisableAtimes(avp)
130 struct inode *ip = VTOI(avp);
135 /* Generic read interface */
136 afs_osi_Read(afile, offset, aptr, asize)
137 register struct osi_file *afile;
141 struct AFS_UCRED *oldCred;
143 register afs_int32 code;
144 register afs_int32 cnt1=0;
145 AFS_STATCNT(osi_Read);
148 * If the osi_file passed in is NULL, panic only if AFS is not shutting
149 * down. No point in crashing when we are already shutting down
152 if ( !afs_shuttingdown )
153 osi_Panic("osi_Read called with null param");
158 if (offset != -1) afile->offset = offset;
161 code = gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset,
162 AFS_UIOSYS, IO_UNIT, &resid);
165 code = asize - resid;
166 afile->offset += code;
167 osi_DisableAtimes(afile->vnode);
170 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, (afs_int32) resid,
171 ICL_TYPE_INT32, code);
173 * To handle periodic low-level EFAULT failures that we've seen with the
174 * Weitek chip; in all observed failed cases a second read succeeded.
176 if ((code == EFAULT) && (cnt1++ < 5)) {
177 afs_stats_cmperf.osiread_efaults++;
186 /* Generic write interface */
187 afs_osi_Write(afile, offset, aptr, asize)
188 register struct osi_file *afile;
192 struct AFS_UCRED *oldCred;
194 register afs_int32 code;
195 AFS_STATCNT(osi_Write);
197 osi_Panic("afs_osi_Write called with null param");
198 if (offset != -1) afile->offset = offset;
200 code = gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize, afile->offset,
201 AFS_UIOSYS, IO_UNIT, &resid);
204 code = asize - resid;
205 afile->offset += code;
208 if (code == ENOSPC) afs_warnuser("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
213 (*afile->proc)(afile, code);
222 extern int afs_cold_shutdown;
224 AFS_STATCNT(shutdown_osifile);
225 if (afs_cold_shutdown) {
226 afs_osicred_initialized = 0;