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805e021f CE |
1 | /* |
2 | * Copyright 2000, International Business Machines Corporation and others. | |
3 | * All Rights Reserved. | |
4 | * | |
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 | |
8 | */ | |
9 | ||
10 | #include <afsconfig.h> | |
11 | #include "afs/param.h" | |
12 | ||
13 | ||
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 | ||
18 | afs_ucred_t afs_osi_cred; | |
19 | int afs_osicred_initialized = 0; | |
20 | extern struct osi_dev cacheDev; | |
21 | extern struct vfs *afs_cacheVfsp; | |
22 | ||
23 | vnode_t * | |
24 | afs_XFSIGetVnode(ino_t ainode) | |
25 | { | |
26 | struct xfs_inode *ip; | |
27 | int error; | |
28 | vnode_t *vp; | |
29 | ||
30 | if ((error = | |
31 | xfs_igetinode(afs_cacheVfsp, (dev_t) cacheDev.dev, ainode, &ip))) { | |
32 | osi_Panic("afs_XFSIGetVnode: xfs_igetinode failed, error=%d", error); | |
33 | } | |
34 | vp = XFS_ITOV(ip); | |
35 | return vp; | |
36 | } | |
37 | ||
38 | /* Force to 64 bits, even for EFS filesystems. */ | |
39 | void * | |
40 | osi_UFSOpen(afs_dcache_id_t *ainode) | |
41 | { | |
42 | struct inode *ip; | |
43 | struct osi_file *afile = NULL; | |
44 | extern int cacheDiskType; | |
45 | afs_int32 code = 0; | |
46 | int dummy; | |
47 | AFS_STATCNT(osi_UFSOpen); | |
48 | if (cacheDiskType != AFS_FCACHE_TYPE_UFS) { | |
49 | osi_Panic("UFSOpen called for non-UFS cache\n"); | |
50 | } | |
51 | if (!afs_osicred_initialized) { | |
52 | /* valid for alpha_osf, SunOS, Ultrix */ | |
53 | memset(&afs_osi_cred, 0, sizeof(afs_ucred_t)); | |
54 | crhold(&afs_osi_cred); /* don't let it evaporate, since it is static */ | |
55 | afs_osicred_initialized = 1; | |
56 | } | |
57 | afile = osi_AllocSmallSpace(sizeof(struct osi_file)); | |
58 | AFS_GUNLOCK(); | |
59 | afile->vnode = afs_XFSIGetVnode(ainode->ufs); | |
60 | AFS_GLOCK(); | |
61 | afile->size = VnodeToSize(afile->vnode); | |
62 | afile->offset = 0; | |
63 | afile->proc = (int (*)())0; | |
64 | return (void *)afile; | |
65 | } | |
66 | ||
67 | int | |
68 | afs_osi_Stat(struct osi_file *afile, struct osi_stat *astat) | |
69 | { | |
70 | afs_int32 code; | |
71 | struct vattr tvattr; | |
72 | AFS_STATCNT(osi_Stat); | |
73 | AFS_GUNLOCK(); | |
74 | tvattr.va_mask = AT_SIZE | AT_BLKSIZE | AT_MTIME | AT_ATIME; | |
75 | AFS_VOP_GETATTR(afile->vnode, &tvattr, 0, &afs_osi_cred, code); | |
76 | AFS_GLOCK(); | |
77 | if (code == 0) { | |
78 | astat->size = tvattr.va_size; | |
79 | astat->mtime = tvattr.va_mtime.tv_sec; | |
80 | astat->atime = tvattr.va_atime.tv_sec; | |
81 | } | |
82 | return code; | |
83 | } | |
84 | ||
85 | int | |
86 | osi_UFSClose(struct osi_file *afile) | |
87 | { | |
88 | AFS_STATCNT(osi_Close); | |
89 | if (afile->vnode) { | |
90 | VN_RELE(afile->vnode); | |
91 | } | |
92 | ||
93 | osi_FreeSmallSpace(afile); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | int | |
98 | osi_UFSTruncate(struct osi_file *afile, afs_int32 asize) | |
99 | { | |
100 | afs_ucred_t *oldCred; | |
101 | struct vattr tvattr; | |
102 | afs_int32 code; | |
103 | struct osi_stat tstat; | |
104 | mon_state_t ms; | |
105 | AFS_STATCNT(osi_Truncate); | |
106 | ||
107 | /* This routine only shrinks files, and most systems | |
108 | * have very slow truncates, even when the file is already | |
109 | * small enough. Check now and save some time. | |
110 | */ | |
111 | code = afs_osi_Stat(afile, &tstat); | |
112 | if (code || tstat.size <= asize) | |
113 | return code; | |
114 | AFS_GUNLOCK(); | |
115 | tvattr.va_mask = AT_SIZE; | |
116 | tvattr.va_size = asize; | |
117 | AFS_VOP_SETATTR(afile->vnode, &tvattr, 0, &afs_osi_cred, code); | |
118 | AFS_GLOCK(); | |
119 | return code; | |
120 | } | |
121 | ||
122 | ||
123 | /* Generic read interface */ | |
124 | int | |
125 | afs_osi_Read(struct osi_file *afile, int offset, void *aptr, | |
126 | afs_int32 asize) | |
127 | { | |
128 | afs_ucred_t *oldCred; | |
129 | ssize_t resid; | |
130 | afs_int32 code; | |
131 | afs_int32 cnt1 = 0; | |
132 | AFS_STATCNT(osi_Read); | |
133 | ||
134 | /** | |
135 | * If the osi_file passed in is NULL, panic only if AFS is not shutting | |
136 | * down. No point in crashing when we are already shutting down | |
137 | */ | |
138 | if (!afile) { | |
139 | if (afs_shuttingdown == AFS_RUNNING) | |
140 | osi_Panic("osi_Read called with null param"); | |
141 | else | |
142 | return -EIO; | |
143 | } | |
144 | ||
145 | if (offset != -1) | |
146 | afile->offset = offset; | |
147 | AFS_GUNLOCK(); | |
148 | code = | |
149 | gop_rdwr(UIO_READ, afile->vnode, (caddr_t) aptr, asize, afile->offset, | |
150 | AFS_UIOSYS, 0, 0x7fffffff, &afs_osi_cred, &resid); | |
151 | AFS_GLOCK(); | |
152 | if (code == 0) { | |
153 | code = asize - resid; | |
154 | afile->offset += code; | |
155 | } else { | |
156 | afs_Trace2(afs_iclSetp, CM_TRACE_READFAILED, ICL_TYPE_INT32, resid, | |
157 | ICL_TYPE_INT32, code); | |
158 | if (code > 0) { | |
159 | code = -code; | |
160 | } | |
161 | } | |
162 | return code; | |
163 | } | |
164 | ||
165 | /* Generic write interface */ | |
166 | int | |
167 | afs_osi_Write(struct osi_file *afile, afs_int32 offset, void *aptr, | |
168 | afs_int32 asize) | |
169 | { | |
170 | afs_ucred_t *oldCred; | |
171 | ssize_t resid; | |
172 | afs_int32 code; | |
173 | AFS_STATCNT(osi_Write); | |
174 | if (!afile) | |
175 | osi_Panic("afs_osi_Write called with null param"); | |
176 | if (offset != -1) | |
177 | afile->offset = offset; | |
178 | AFS_GUNLOCK(); | |
179 | code = | |
180 | gop_rdwr(UIO_WRITE, afile->vnode, (caddr_t) aptr, asize, | |
181 | afile->offset, AFS_UIOSYS, 0, 0x7fffffff, &afs_osi_cred, | |
182 | &resid); | |
183 | AFS_GLOCK(); | |
184 | if (code == 0) { | |
185 | code = asize - resid; | |
186 | afile->offset += code; | |
187 | } else { | |
188 | if (code == ENOSPC) | |
189 | afs_WarnENOSPC(); | |
190 | if (code > 0) { | |
191 | code = -code; | |
192 | } | |
193 | } | |
194 | if (afile->proc) { | |
195 | (*afile->proc) (afile, code); | |
196 | } | |
197 | return code; | |
198 | } | |
199 | ||
200 | ||
201 | /* This work should be handled by physstrat in ca/machdep.c. | |
202 | This routine written from the RT NFS port strategy routine. | |
203 | It has been generalized a bit, but should still be pretty clear. */ | |
204 | int | |
205 | afs_osi_MapStrategy(int (*aproc) (), struct buf *bp) | |
206 | { | |
207 | afs_int32 returnCode; | |
208 | ||
209 | AFS_STATCNT(osi_MapStrategy); | |
210 | returnCode = (*aproc) (bp); | |
211 | ||
212 | return returnCode; | |
213 | } | |
214 | ||
215 | ||
216 | ||
217 | void | |
218 | shutdown_osifile(void) | |
219 | { | |
220 | AFS_STATCNT(shutdown_osifile); | |
221 | if (afs_cold_shutdown) { | |
222 | afs_osicred_initialized = 0; | |
223 | } | |
224 | } |