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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 | /* | |
11 | * osi_vfsops.c for AIX | |
12 | */ | |
13 | #include <afsconfig.h> | |
14 | #include "afs/param.h" | |
15 | ||
16 | ||
17 | #include "afs/sysincludes.h" /* Standard vendor system headers */ | |
18 | #include "afsincludes.h" /* Afs-based standard headers */ | |
19 | #include "afs/afs_stats.h" /* statistics stuff */ | |
20 | ||
21 | ||
22 | #ifdef AFS_AIX_IAUTH_ENV | |
23 | #include "afs/nfsclient.h" | |
24 | #include "afs/exporter.h" | |
25 | extern struct afs_exporter *afs_nfsexporter; | |
26 | #endif | |
27 | ||
28 | #define AFS_VFSLOCK_DECL int glockOwner = ISAFS_GLOCK() | |
29 | #define AFS_VFSLOCK() if (!glockOwner) AFS_GLOCK() | |
30 | #define AFS_VFSUNLOCK() if (!glockOwner) AFS_GUNLOCK() | |
31 | ||
32 | struct vfs *afs_globalVFS = 0; | |
33 | struct vcache *afs_globalVp = 0; | |
34 | ||
35 | static int afs_root_nolock(struct vfs *afsp, struct vnode **avpp); | |
36 | ||
37 | static int | |
38 | afs_mount(afsp, path, data) | |
39 | char *path; | |
40 | caddr_t data; | |
41 | struct vfs *afsp; | |
42 | { | |
43 | struct vnode *afsrootvp = NULL; | |
44 | int error; | |
45 | AFS_VFSLOCK_DECL; | |
46 | AFS_VFSLOCK(); | |
47 | AFS_STATCNT(afs_mount); | |
48 | ||
49 | if (afs_globalVFS) { | |
50 | /* Don't allow remounts since some system (like AIX) don't handle | |
51 | * it well. | |
52 | */ | |
53 | AFS_VFSUNLOCK(); | |
54 | return (setuerror(EBUSY)); | |
55 | } | |
56 | ||
57 | ||
58 | afs_globalVFS = afsp; | |
59 | afsp->vfs_bsize = 8192; | |
60 | afsp->vfs_count = 0; | |
61 | #ifdef AFS_64BIT_CLIENT | |
62 | afsp->vfs_flag |= VFS_DEVMOUNT; | |
63 | #endif /* AFS_64BIT_CLIENT */ | |
64 | ||
65 | afsp->vfs_fsid.val[0] = AFS_VFSMAGIC; /* magic */ | |
66 | afsp->vfs_fsid.val[1] = AFS_VFSFSID; | |
67 | ||
68 | /* For AFS, we don't allow file over file mounts. */ | |
69 | if (afsp->vfs_mntdover->v_type != VDIR) { | |
70 | AFS_VFSUNLOCK(); | |
71 | return (setuerror(ENOTDIR)); | |
72 | } | |
73 | /* try to get the root vnode, but don't worry if you don't. The actual | |
74 | * setting of the root vnode (vfs_mntd) is done in afs_root, so that it | |
75 | * get re-eval'd at the right time if things aren't working when we | |
76 | * first try the mount. | |
77 | */ | |
78 | afs_root_nolock(afsp, &afsrootvp); | |
79 | ||
80 | afsp->vfs_mntdover->v_mvfsp = afsp; | |
81 | afsp->vfs_mdata->vmt_flags |= MNT_REMOTE; | |
82 | ||
83 | #ifdef AFS_AIX51_ENV | |
84 | afsp->vfs_count = 1; | |
85 | afsp->vfs_mntd->v_count = 1; | |
86 | #endif | |
87 | #ifdef AFS_AIX_IAUTH_ENV | |
88 | if (afs_iauth_register() < 0) | |
89 | afs_warn("Can't register AFS iauth interface.\n"); | |
90 | #endif | |
91 | AFS_VFSUNLOCK(); | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int | |
96 | afs_unmount(struct vfs *afsp, int flag) | |
97 | { | |
98 | AFS_VFSLOCK_DECL; | |
99 | AFS_VFSLOCK(); | |
100 | AFS_STATCNT(afs_unmount); | |
101 | ||
102 | afs_globalVFS = 0; | |
103 | afs_cold_shutdown = 1; | |
104 | afs_shutdown(); | |
105 | ||
106 | AFS_VFSUNLOCK(); | |
107 | return 0; | |
108 | } | |
109 | ||
110 | static int | |
111 | afs_root_nolock(struct vfs *afsp, struct vnode **avpp) | |
112 | { | |
113 | afs_int32 code = 0; | |
114 | struct vrequest treq; | |
115 | struct vcache *tvp = 0; | |
116 | ||
117 | AFS_STATCNT(afs_root); | |
118 | if (afs_globalVp && (afs_globalVp->f.states & CStatd)) { | |
119 | tvp = afs_globalVp; | |
120 | } else { | |
121 | struct ucred *credp; | |
122 | if (afs_globalVp) { | |
123 | afs_PutVCache(afs_globalVp); | |
124 | afs_globalVp = NULL; | |
125 | } | |
126 | credp = crref(); | |
127 | if (!(code = afs_InitReq(&treq, credp)) && !(code = afs_CheckInit())) { | |
128 | tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL); | |
129 | /* we really want this to stay around */ | |
130 | if (tvp) { | |
131 | afs_globalVp = tvp; | |
132 | } else | |
133 | code = EIO; | |
134 | } | |
135 | crfree(credp); | |
136 | } | |
137 | if (tvp) { | |
138 | VN_HOLD(AFSTOV(tvp)); | |
139 | ||
140 | VN_LOCK(AFSTOV(tvp)); | |
141 | AFSTOV(tvp)->v_flag |= VROOT; /* No-op on Ultrix 2.2 */ | |
142 | VN_UNLOCK(AFSTOV(tvp)); | |
143 | ||
144 | afs_globalVFS = afsp; | |
145 | *avpp = AFSTOV(tvp); | |
146 | afsp->vfs_mntd = *avpp; | |
147 | } | |
148 | ||
149 | afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, *avpp, | |
150 | ICL_TYPE_INT32, code); | |
151 | return code; | |
152 | } | |
153 | ||
154 | ||
155 | static int | |
156 | afs_root(struct vfs *afsp, struct vnode **avpp) | |
157 | { | |
158 | int code; | |
159 | AFS_VFSLOCK_DECL; | |
160 | AFS_VFSLOCK(); | |
161 | code = afs_root_nolock(afsp, avpp); | |
162 | AFS_VFSUNLOCK(); | |
163 | return code; | |
164 | } | |
165 | ||
166 | static int | |
167 | afs_statfs(struct vfs *afsp, struct statfs *abp, struct ucred *credp) | |
168 | { | |
169 | AFS_VFSLOCK_DECL; | |
170 | AFS_VFSLOCK(); | |
171 | AFS_STATCNT(afs_statfs); | |
172 | ||
173 | abp->f_version = 0; | |
174 | abp->f_type = 0; | |
175 | abp->f_bsize = afsp->vfs_bsize; | |
176 | abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files = | |
177 | abp->f_ffree = AFS_VFS_FAKEFREE; | |
178 | abp->f_vfstype = AFS_VFSFSID; | |
179 | abp->f_vfsnumber = afsp->vfs_number; | |
180 | abp->f_vfsoff = abp->f_vfslen = abp->f_vfsvers = -1; | |
181 | abp->f_fsize = 4096; /* fundamental filesystem block size */ | |
182 | abp->f_fsid = afsp->vfs_fsid; | |
183 | (void)strcpy(abp->f_fname, "/afs"); | |
184 | (void)strcpy(abp->f_fpack, "AFS"); | |
185 | abp->f_name_max = 256; | |
186 | ||
187 | AFS_VFSUNLOCK(); | |
188 | return 0; | |
189 | } | |
190 | ||
191 | static int | |
192 | afs_sync() | |
193 | { | |
194 | AFS_VFSLOCK_DECL; | |
195 | AFS_VFSLOCK(); | |
196 | AFS_STATCNT(afs_sync); | |
197 | ||
198 | AFS_VFSUNLOCK(); | |
199 | return 0; | |
200 | } | |
201 | ||
202 | ||
203 | /* Note that the cred is only for AIX 4.1.5+ and AIX 4.2+ */ | |
204 | static int | |
205 | afs_vget(struct vfs *vfsp, struct vnode **avcp, struct fileid *fidp, | |
206 | struct ucred *credp) | |
207 | { | |
208 | int code; | |
209 | struct vrequest treq; | |
210 | AFS_VFSLOCK_DECL; | |
211 | AFS_VFSLOCK(); | |
212 | AFS_STATCNT(afs_vget); | |
213 | *avcp = NULL; | |
214 | ||
215 | #ifdef AFS_AIX_IAUTH_ENV | |
216 | /* If the exporter is off and this is an nfsd, fail immediately. */ | |
217 | if (AFS_NFSXLATORREQ(credp) | |
218 | && !(afs_nfsexporter->exp_states & EXP_EXPORTED)) { | |
219 | return EACCES; | |
220 | } | |
221 | #endif | |
222 | ||
223 | if ((code = afs_InitReq(&treq, credp)) == 0) { | |
224 | code = afs_osi_vget((struct vcache **)avcp, fidp, &treq); | |
225 | } | |
226 | ||
227 | afs_Trace3(afs_iclSetp, CM_TRACE_VGET, ICL_TYPE_POINTER, *avcp, | |
228 | ICL_TYPE_INT32, treq.uid, ICL_TYPE_FID, fidp); | |
229 | code = afs_CheckCode(code, &treq, 42); | |
230 | ||
231 | AFS_VFSUNLOCK(); | |
232 | return code; | |
233 | } | |
234 | ||
235 | static int | |
236 | afs_badop() | |
237 | { | |
238 | return EOPNOTSUPP; | |
239 | } | |
240 | ||
241 | ||
242 | struct vfsops Afs_vfsops = { | |
243 | afs_mount, | |
244 | afs_unmount, | |
245 | afs_root, | |
246 | afs_statfs, | |
247 | afs_sync, | |
248 | afs_vget, | |
249 | afs_badop, /* vfs_cntl */ | |
250 | afs_badop /* vfs_quotactl */ | |
251 | #ifdef AFS_AIX51_ENV | |
252 | , afs_badop /* vfs_syncvfs */ | |
253 | #endif | |
254 | }; | |
255 | ||
256 | /* | |
257 | * VFS is initialized in osi_config.c | |
258 | */ |