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 */
17 #include "afs/osi_inode.h" /* igetinode() */
20 int afs_osicred_initialized = 0;
21 AFS_UCRED afs_osi_cred;
22 afs_lock_t afs_xosi; /* lock is for tvattr */
23 extern struct osi_dev cacheDev;
24 extern struct vfs *afs_cacheVfsp;
28 osi_UFSOpen(afs_dcache_id_t *ainode)
31 register struct osi_file *afile = NULL;
32 extern int cacheDiskType;
35 AFS_STATCNT(osi_UFSOpen);
36 if (cacheDiskType != AFS_FCACHE_TYPE_UFS) {
37 osi_Panic("UFSOpen called for non-UFS cache\n");
39 if (!afs_osicred_initialized) {
40 /* valid for alpha_osf, SunOS, Ultrix */
41 memset((char *)&afs_osi_cred, 0, sizeof(AFS_UCRED));
42 crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */
43 afs_osicred_initialized = 1;
45 afile = (struct osi_file *)osi_AllocSmallSpace(sizeof(struct osi_file));
48 ip = (struct inode *)igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev,
49 (ino_t) ainode->ufs, &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->ufs; /* for hint validity checking */
65 afs_osi_Stat(register struct osi_file *afile, 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->mtime = tvattr.va_mtime.tv_sec;
77 astat->atime = tvattr.va_atime.tv_sec;
79 MReleaseWriteLock(&afs_xosi);
84 osi_UFSClose(register struct osi_file *afile)
86 AFS_STATCNT(osi_Close);
88 AFS_RELE(afile->vnode);
91 osi_FreeSmallSpace(afile);
96 osi_UFSTruncate(register struct osi_file *afile, afs_int32 asize)
100 register afs_int32 code;
101 struct osi_stat tstat;
102 AFS_STATCNT(osi_Truncate);
104 /* This routine only shrinks files, and most systems
105 * have very slow truncates, even when the file is already
106 * small enough. Check now and save some time.
108 code = afs_osi_Stat(afile, &tstat);
109 if (code || tstat.size <= asize)
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);
128 osi_DisableAtimes(struct vnode *avp)
130 struct inode *ip = VTOI(avp);
135 /* Generic read interface */
137 afs_osi_Read(register struct osi_file *afile, int offset, void *aptr,
142 register afs_int32 code;
143 register afs_int32 cnt1 = 0;
144 AFS_STATCNT(osi_Read);
147 * If the osi_file passed in is NULL, panic only if AFS is not shutting
148 * down. No point in crashing when we are already shutting down
151 if (!afs_shuttingdown)
152 osi_Panic("osi_Read called with null param");
158 afile->offset = offset;
162 gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset,
163 AFS_UIOSYS, IO_UNIT, &resid);
166 code = asize - resid;
167 afile->offset += code;
168 osi_DisableAtimes(afile->vnode);
170 afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32,
171 (afs_int32) resid, 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 */
188 afs_osi_Write(register struct osi_file *afile, afs_int32 offset, void *aptr,
193 register afs_int32 code;
194 AFS_STATCNT(osi_Write);
196 osi_Panic("afs_osi_Write called with null param");
198 afile->offset = offset;
201 gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize,
202 afile->offset, AFS_UIOSYS, IO_UNIT, &resid);
205 code = asize - resid;
206 afile->offset += code;
210 ("\n\n\n*** Cache partition is FULL - Decrease cachesize!!! ***\n\n");
215 (*afile->proc) (afile, code);
222 shutdown_osifile(void)
224 AFS_STATCNT(shutdown_osifile);
225 if (afs_cold_shutdown) {
226 afs_osicred_initialized = 0;