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"
16 #include "afs/sysincludes.h" /* Standard vendor system headers */
17 #include "afsincludes.h" /* Afs-based standard headers */
18 #include "afs/afs_stats.h" /* afs statistics */
19 #include "afs/osi_inode.h" /* igetinode() */
22 int afs_osicred_initialized = 0;
23 struct AFS_UCRED afs_osi_cred;
24 afs_lock_t afs_xosi; /* lock is for tvattr */
25 extern struct osi_dev cacheDev;
26 extern struct vfs *afs_cacheVfsp;
30 osi_UFSOpen(afs_dcache_id_t *ainode)
33 register struct osi_file *afile = NULL;
34 extern int cacheDiskType;
37 AFS_STATCNT(osi_UFSOpen);
38 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
39 osi_Panic("UFSOpen called for non-UFS cache\n");
41 if (!afs_osicred_initialized) {
42 /* valid for alpha_osf, SunOS, Ultrix */
43 memset((char *)&afs_osi_cred, 0, sizeof(struct AFS_UCRED));
44 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
45 afs_osicred_initialized = 1;
47 afile = (struct osi_file *)osi_AllocSmallSpace(sizeof(struct osi_file));
50 ip = (struct inode *)igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev,
51 (ino_t) ainode->ufs, &dummy);
54 osi_FreeSmallSpace(afile);
55 osi_Panic("UFSOpen: igetinode failed");
58 afile->vnode = ITOV(ip);
59 afile->size = VTOI(afile->vnode)->i_size;
61 afile->proc = (int (*)())0;
62 afile->inum = ainode->ufs; /* for hint validity checking */
67 afs_osi_Stat(register struct osi_file *afile, register struct osi_stat *astat)
69 register afs_int32 code;
71 AFS_STATCNT(osi_Stat);
72 MObtainWriteLock(&afs_xosi, 320);
74 code = VOP_GETATTR(afile->vnode, &tvattr, &afs_osi_cred, VSYNC);
77 astat->size = tvattr.va_size;
78 astat->mtime = tvattr.va_mtime.tv_sec;
79 astat->atime = tvattr.va_atime.tv_sec;
81 MReleaseWriteLock(&afs_xosi);
86 osi_UFSClose(register struct osi_file *afile)
88 AFS_STATCNT(osi_Close);
90 AFS_RELE(afile->vnode);
93 osi_FreeSmallSpace(afile);
98 osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
100 struct AFS_UCRED *oldCred;
102 register afs_int32 code;
103 struct osi_stat tstat;
104 AFS_STATCNT(osi_Truncate);
106 /* This routine only shrinks files, and most systems
107 * have very slow truncates, even when the file is already
108 * small enough. Check now and save some time.
110 code = afs_osi_Stat(afile, &tstat);
111 if (code || tstat.size <= asize)
113 MObtainWriteLock(&afs_xosi, 321);
115 /* note that this credential swapping stuff is only necessary because
116 * of ufs's references directly to u.u_cred instead of to
117 * credentials parameter. Probably should fix ufs some day. */
118 oldCred = p_cred(u.u_procp);
119 set_p_cred(u.u_procp, &afs_osi_cred);
120 tvattr.va_size = asize;
122 code = VOP_SETATTR(afile->vnode, &tvattr, &afs_osi_cred, 0);
124 set_p_cred(u.u_procp, oldCred); /* restore */
125 MReleaseWriteLock(&afs_xosi);
130 osi_DisableAtimes(struct vnode *avp)
132 struct inode *ip = VTOI(avp);
137 /* Generic read interface */
139 afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
142 struct AFS_UCRED *oldCred;
144 register afs_int32 code;
145 register afs_int32 cnt1 = 0;
146 AFS_STATCNT(osi_Read);
149 * If the osi_file passed in is NULL, panic only if AFS is not shutting
150 * down. No point in crashing when we are already shutting down
153 if (!afs_shuttingdown)
154 osi_Panic("osi_Read called with null param");
160 afile->offset = offset;
164 gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset,
165 AFS_UIOSYS, IO_UNIT, &resid);
168 code = asize - resid;
169 afile->offset += code;
170 osi_DisableAtimes(afile->vnode);
172 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32,
173 (afs_int32) resid, ICL_TYPE_INT32, code);
175 * To handle periodic low-level EFAULT failures that we've seen with the
176 * Weitek chip; in all observed failed cases a second read succeeded.
178 if ((code == EFAULT) && (cnt1++ < 5)) {
179 afs_stats_cmperf.osiread_efaults++;
188 /* Generic write interface */
190 afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
193 struct AFS_UCRED *oldCred;
195 register afs_int32 code;
196 AFS_STATCNT(osi_Write);
198 osi_Panic("afs_osi_Write called with null param");
200 afile->offset = offset;
203 gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize,
204 afile->offset, AFS_UIOSYS, IO_UNIT, &resid);
207 code = asize - resid;
208 afile->offset += code;
212 ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
217 (*afile->proc) (afile, code);
224 shutdown_osifile(void)
226 AFS_STATCNT(shutdown_osifile);
227 if (afs_cold_shutdown) {
228 afs_osicred_initialized = 0;