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805e021f CE |
1 | #include <afsconfig.h> |
2 | #include <afs/param.h> | |
3 | ||
4 | ||
5 | #include <afs/sysincludes.h> /* Standard vendor system headers */ | |
6 | #include <afsincludes.h> /* Afs-based standard headers */ | |
7 | #include <afs/afs_stats.h> /* statistics */ | |
8 | #include <sys/malloc.h> | |
9 | #include <sys/namei.h> | |
10 | #include <sys/conf.h> | |
11 | #include <sys/module.h> | |
12 | #include <sys/sysproto.h> | |
13 | #include <sys/syscall.h> | |
14 | #include <sys/sysent.h> | |
15 | ||
16 | struct vcache *afs_globalVp = NULL; | |
17 | struct mount *afs_globalVFS = NULL; | |
18 | int afs_pbuf_freecnt = -1; | |
19 | ||
20 | extern int Afs_xsetgroups(); | |
21 | extern int afs_xioctl(); | |
22 | ||
23 | #if !defined(AFS_FBSD90_ENV) && !defined(AFS_FBSD82_ENV) | |
24 | static sy_call_t *old_handler; | |
25 | #else | |
26 | static struct sysent old_sysent; | |
27 | ||
28 | static struct sysent afs_sysent = { | |
29 | 5, /* int sy_narg */ | |
30 | (sy_call_t *) afs3_syscall, /* sy_call_t *sy_call */ | |
31 | #ifdef AFS_FBSD60_ENV | |
32 | AUE_NULL, /* au_event_t sy_auevent */ | |
33 | #ifdef AFS_FBSD70_ENV | |
34 | NULL, /* systrace_args_funt_t sy_systrace_args_func */ | |
35 | 0, /* u_int32_t sy_entry */ | |
36 | 0, /* u_int32_t sy_return */ | |
37 | #ifdef AFS_FBSD90_ENV | |
38 | 0, /* u_int32_t sy_flags */ | |
39 | 0 /* u_int32_t sy_thrcnt */ | |
40 | #endif | |
41 | #endif | |
42 | #endif /* FBSD60 */ | |
43 | }; | |
44 | #endif /* FBSD90 */ | |
45 | ||
46 | int | |
47 | afs_init(struct vfsconf *vfc) | |
48 | { | |
49 | int code; | |
50 | int offset = AFS_SYSCALL; | |
51 | #if defined(AFS_FBSD90_ENV) || defined(AFS_FBSD82_ENV) | |
52 | # if defined(FBSD_SYSCALL_REGISTER_FOUR_ARGS) | |
53 | code = syscall_register(&offset, &afs_sysent, &old_sysent, 0); | |
54 | # else | |
55 | code = syscall_register(&offset, &afs_sysent, &old_sysent); | |
56 | # endif | |
57 | if (code) { | |
58 | printf("AFS_SYSCALL in use, error %i. aborting\n", code); | |
59 | return code; | |
60 | } | |
61 | #else | |
62 | if (sysent[AFS_SYSCALL].sy_call != (sy_call_t *)nosys | |
63 | && sysent[AFS_SYSCALL].sy_call != (sy_call_t *)lkmnosys) { | |
64 | printf("AFS_SYSCALL in use. aborting\n"); | |
65 | return EBUSY; | |
66 | } | |
67 | #endif | |
68 | osi_Init(); | |
69 | afs_pbuf_freecnt = nswbuf / 2 + 1; | |
70 | #if !defined(AFS_FBSD90_ENV) && !defined(AFS_FBSD82_ENV) | |
71 | old_handler = sysent[AFS_SYSCALL].sy_call; | |
72 | sysent[AFS_SYSCALL].sy_call = afs3_syscall; | |
73 | sysent[AFS_SYSCALL].sy_narg = 5; | |
74 | #endif | |
75 | return 0; | |
76 | } | |
77 | ||
78 | int | |
79 | afs_uninit(struct vfsconf *vfc) | |
80 | { | |
81 | #if defined(AFS_FBSD90_ENV) || defined(AFS_FBSD82_ENV) | |
82 | int offset = AFS_SYSCALL; | |
83 | #endif | |
84 | ||
85 | if (afs_globalVFS) | |
86 | return EBUSY; | |
87 | #if defined(AFS_FBSD90_ENV) || defined(AFS_FBSD82_ENV) | |
88 | syscall_deregister(&offset, &old_sysent); | |
89 | #else | |
90 | sysent[AFS_SYSCALL].sy_narg = 0; | |
91 | sysent[AFS_SYSCALL].sy_call = old_handler; | |
92 | #endif | |
93 | return 0; | |
94 | } | |
95 | ||
96 | int | |
97 | afs_start(struct mount *mp, int flags, struct thread *p) | |
98 | { | |
99 | return (0); /* nothing to do. ? */ | |
100 | } | |
101 | ||
102 | int | |
103 | #if defined(AFS_FBSD80_ENV) | |
104 | afs_omount(struct mount *mp, char *path, caddr_t data) | |
105 | #elif defined(AFS_FBSD53_ENV) | |
106 | afs_omount(struct mount *mp, char *path, caddr_t data, struct thread *p) | |
107 | #else | |
108 | afs_omount(struct mount *mp, char *path, caddr_t data, struct nameidata *ndp, | |
109 | struct thread *p) | |
110 | #endif | |
111 | { | |
112 | /* ndp contains the mounted-from device. Just ignore it. | |
113 | * we also don't care about our thread struct. */ | |
114 | size_t size; | |
115 | ||
116 | if (mp->mnt_flag & MNT_UPDATE) | |
117 | return EINVAL; | |
118 | ||
119 | AFS_GLOCK(); | |
120 | AFS_STATCNT(afs_mount); | |
121 | ||
122 | if (afs_globalVFS) { /* Don't allow remounts. */ | |
123 | AFS_GUNLOCK(); | |
124 | return EBUSY; | |
125 | } | |
126 | ||
127 | afs_globalVFS = mp; | |
128 | mp->vfs_bsize = 8192; | |
129 | vfs_getnewfsid(mp); | |
130 | /* | |
131 | * This is kind of ugly, as the interlock has grown to encompass | |
132 | * more fields over time and there's not a good way to group the | |
133 | * code without duplication. | |
134 | */ | |
135 | #ifdef AFS_FBSD62_ENV | |
136 | MNT_ILOCK(mp); | |
137 | #endif | |
138 | mp->mnt_flag &= ~MNT_LOCAL; | |
139 | #if defined(AFS_FBSD61_ENV) && !defined(AFS_FBSD62_ENV) | |
140 | MNT_ILOCK(mp); | |
141 | #endif | |
142 | #if __FreeBSD_version < 1000021 | |
143 | mp->mnt_kern_flag |= MNTK_MPSAFE; /* solid steel */ | |
144 | #endif | |
145 | #ifndef AFS_FBSD61_ENV | |
146 | MNT_ILOCK(mp); | |
147 | #endif | |
148 | /* | |
149 | * XXX mnt_stat "is considered stable as long as a ref is held". | |
150 | * We should check that we hold the only ref. | |
151 | */ | |
152 | mp->mnt_stat.f_iosize = 8192; | |
153 | ||
154 | if (path != NULL) | |
155 | copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size); | |
156 | else | |
157 | bcopy("/afs", mp->mnt_stat.f_mntonname, size = 4); | |
158 | memset(mp->mnt_stat.f_mntonname + size, 0, MNAMELEN - size); | |
159 | memset(mp->mnt_stat.f_mntfromname, 0, MNAMELEN); | |
160 | strcpy(mp->mnt_stat.f_mntfromname, "AFS"); | |
161 | /* null terminated string "AFS" will fit, just leave it be. */ | |
162 | strcpy(mp->mnt_stat.f_fstypename, "afs"); | |
163 | MNT_IUNLOCK(mp); | |
164 | AFS_GUNLOCK(); | |
165 | #ifdef AFS_FBSD80_ENV | |
166 | afs_statfs(mp, &mp->mnt_stat); | |
167 | #else | |
168 | afs_statfs(mp, &mp->mnt_stat, p); | |
169 | #endif | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | #ifdef AFS_FBSD53_ENV | |
175 | int | |
176 | #ifdef AFS_FBSD80_ENV | |
177 | afs_mount(struct mount *mp) | |
178 | #else | |
179 | afs_mount(struct mount *mp, struct thread *td) | |
180 | #endif | |
181 | { | |
182 | #ifdef AFS_FBSD80_ENV | |
183 | return afs_omount(mp, NULL, NULL); | |
184 | #else | |
185 | return afs_omount(mp, NULL, NULL, td); | |
186 | #endif | |
187 | } | |
188 | #endif | |
189 | ||
190 | #ifdef AFS_FBSD60_ENV | |
191 | static int | |
192 | #if (__FreeBSD_version >= 900503 && __FreeBSD_version < 1000000) || __FreeBSD_version >= 1000004 | |
193 | afs_cmount(struct mntarg *ma, void *data, uint64_t flags) | |
194 | #elif defined(AFS_FBSD80_ENV) | |
195 | afs_cmount(struct mntarg *ma, void *data, int flags) | |
196 | #else | |
197 | afs_cmount(struct mntarg *ma, void *data, int flags, struct thread *td) | |
198 | #endif | |
199 | { | |
200 | return kernel_mount(ma, flags); | |
201 | } | |
202 | #endif | |
203 | ||
204 | int | |
205 | #ifdef AFS_FBSD80_ENV | |
206 | afs_unmount(struct mount *mp, int flags) | |
207 | #else | |
208 | afs_unmount(struct mount *mp, int flags, struct thread *p) | |
209 | #endif | |
210 | { | |
211 | int error = 0; | |
212 | ||
213 | AFS_GLOCK(); | |
214 | if (afs_globalVp && | |
215 | ((flags & MNT_FORCE) || !VREFCOUNT_GT(afs_globalVp, 1))) { | |
216 | /* Put back afs_root's ref */ | |
217 | struct vcache *gvp = afs_globalVp; | |
218 | afs_globalVp = NULL; | |
219 | afs_PutVCache(gvp); | |
220 | } | |
221 | if (afs_globalVp) | |
222 | error = EBUSY; | |
223 | AFS_GUNLOCK(); | |
224 | ||
225 | /* | |
226 | * Release any remaining vnodes on this mount point. | |
227 | * The `1' means that we hold one extra reference on | |
228 | * the root vnode (this is just a guess right now). | |
229 | * This has to be done outside the global lock. | |
230 | */ | |
231 | if (!error) { | |
232 | #if defined(AFS_FBSD80_ENV) | |
233 | error = vflush(mp, 1, (flags & MNT_FORCE) ? FORCECLOSE : 0, curthread); | |
234 | #elif defined(AFS_FBSD53_ENV) | |
235 | error = vflush(mp, 1, (flags & MNT_FORCE) ? FORCECLOSE : 0, p); | |
236 | #else | |
237 | error = vflush(mp, 1, (flags & MNT_FORCE) ? FORCECLOSE : 0); | |
238 | #endif | |
239 | } | |
240 | if (error) | |
241 | goto out; | |
242 | AFS_GLOCK(); | |
243 | AFS_STATCNT(afs_unmount); | |
244 | afs_globalVFS = 0; | |
245 | afs_shutdown(); | |
246 | AFS_GUNLOCK(); | |
247 | ||
248 | out: | |
249 | return error; | |
250 | } | |
251 | ||
252 | int | |
253 | #if defined(AFS_FBSD80_ENV) | |
254 | afs_root(struct mount *mp, int flags, struct vnode **vpp) | |
255 | #elif defined(AFS_FBSD60_ENV) | |
256 | afs_root(struct mount *mp, int flags, struct vnode **vpp, struct thread *td) | |
257 | #elif defined(AFS_FBSD53_ENV) | |
258 | afs_root(struct mount *mp, struct vnode **vpp, struct thread *td) | |
259 | #else | |
260 | afs_root(struct mount *mp, struct vnode **vpp) | |
261 | #endif | |
262 | { | |
263 | int error; | |
264 | struct vrequest treq; | |
265 | struct vcache *tvp = 0; | |
266 | struct vcache *gvp; | |
267 | #if !defined(AFS_FBSD53_ENV) || defined(AFS_FBSD80_ENV) | |
268 | struct thread *td = curthread; | |
269 | #endif | |
270 | struct ucred *cr = osi_curcred(); | |
271 | ||
272 | AFS_GLOCK(); | |
273 | AFS_STATCNT(afs_root); | |
274 | crhold(cr); | |
275 | tryagain: | |
276 | if (afs_globalVp && (afs_globalVp->f.states & CStatd)) { | |
277 | tvp = afs_globalVp; | |
278 | error = 0; | |
279 | } else { | |
280 | if (!(error = afs_InitReq(&treq, cr)) && !(error = afs_CheckInit())) { | |
281 | tvp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL); | |
282 | /* we really want this to stay around */ | |
283 | if (tvp) { | |
284 | gvp = afs_globalVp; | |
285 | afs_globalVp = tvp; | |
286 | if (gvp) { | |
287 | afs_PutVCache(gvp); | |
288 | if (tvp != afs_globalVp) { | |
289 | /* someone raced us and won */ | |
290 | afs_PutVCache(tvp); | |
291 | goto tryagain; | |
292 | } | |
293 | } | |
294 | } else | |
295 | error = EIO; | |
296 | } | |
297 | } | |
298 | if (tvp) { | |
299 | struct vnode *vp = AFSTOV(tvp); | |
300 | ||
301 | ASSERT_VI_UNLOCKED(vp, "afs_root"); | |
302 | AFS_GUNLOCK(); | |
303 | error = vget(vp, LK_EXCLUSIVE | LK_RETRY, td); | |
304 | AFS_GLOCK(); | |
305 | /* we dropped the glock, so re-check everything it had serialized */ | |
306 | if (!afs_globalVp || !(afs_globalVp->f.states & CStatd) || | |
307 | tvp != afs_globalVp) { | |
308 | vput(vp); | |
309 | afs_PutVCache(tvp); | |
310 | goto tryagain; | |
311 | } | |
312 | if (error != 0) | |
313 | goto tryagain; | |
314 | /* | |
315 | * I'm uncomfortable about this. Shouldn't this happen at a | |
316 | * higher level, and shouldn't we busy the top-level directory | |
317 | * to prevent recycling? | |
318 | */ | |
319 | vp->v_vflag |= VV_ROOT; | |
320 | ||
321 | afs_globalVFS = mp; | |
322 | *vpp = vp; | |
323 | } | |
324 | ||
325 | afs_Trace2(afs_iclSetp, CM_TRACE_VFSROOT, ICL_TYPE_POINTER, tvp ? AFSTOV(tvp) : NULL, | |
326 | ICL_TYPE_INT32, error); | |
327 | AFS_GUNLOCK(); | |
328 | crfree(cr); | |
329 | return error; | |
330 | } | |
331 | ||
332 | int | |
333 | #ifdef AFS_FBSD80_ENV | |
334 | afs_statfs(struct mount *mp, struct statfs *abp) | |
335 | #else | |
336 | afs_statfs(struct mount *mp, struct statfs *abp, struct thread *p) | |
337 | #endif | |
338 | { | |
339 | AFS_GLOCK(); | |
340 | AFS_STATCNT(afs_statfs); | |
341 | ||
342 | abp->f_bsize = mp->vfs_bsize; | |
343 | abp->f_iosize = mp->vfs_bsize; | |
344 | ||
345 | abp->f_blocks = abp->f_bfree = abp->f_bavail = abp->f_files = | |
346 | abp->f_ffree = AFS_VFS_FAKEFREE; | |
347 | ||
348 | abp->f_fsid.val[0] = mp->mnt_stat.f_fsid.val[0]; | |
349 | abp->f_fsid.val[1] = mp->mnt_stat.f_fsid.val[1]; | |
350 | if (abp != &mp->mnt_stat) { | |
351 | abp->f_type = mp->mnt_vfc->vfc_typenum; | |
352 | memcpy((caddr_t) & abp->f_mntonname[0], | |
353 | (caddr_t) mp->mnt_stat.f_mntonname, MNAMELEN); | |
354 | memcpy((caddr_t) & abp->f_mntfromname[0], | |
355 | (caddr_t) mp->mnt_stat.f_mntfromname, MNAMELEN); | |
356 | } | |
357 | ||
358 | AFS_GUNLOCK(); | |
359 | return 0; | |
360 | } | |
361 | ||
362 | int | |
363 | #if defined(AFS_FBSD80_ENV) | |
364 | afs_sync(struct mount *mp, int waitfor) | |
365 | #elif defined(AFS_FBSD60_ENV) | |
366 | afs_sync(struct mount *mp, int waitfor, struct thread *td) | |
367 | #else | |
368 | afs_sync(struct mount *mp, int waitfor, struct ucred *cred, struct thread *p) | |
369 | #endif | |
370 | { | |
371 | return 0; | |
372 | } | |
373 | ||
374 | #ifdef AFS_FBSD60_ENV | |
375 | struct vfsops afs_vfsops = { | |
376 | .vfs_init = afs_init, | |
377 | .vfs_mount = afs_mount, | |
378 | .vfs_cmount = afs_cmount, | |
379 | .vfs_root = afs_root, | |
380 | .vfs_statfs = afs_statfs, | |
381 | .vfs_sync = afs_sync, | |
382 | .vfs_uninit = afs_uninit, | |
383 | .vfs_unmount = afs_unmount, | |
384 | .vfs_sysctl = vfs_stdsysctl, | |
385 | }; | |
386 | #else | |
387 | struct vfsops afs_vfsops = { | |
388 | #ifdef AFS_FBSD53_ENV | |
389 | afs_mount, | |
390 | #endif | |
391 | afs_omount, | |
392 | afs_start, | |
393 | afs_unmount, | |
394 | afs_root, | |
395 | vfs_stdquotactl, | |
396 | afs_statfs, | |
397 | afs_sync, | |
398 | vfs_stdvget, | |
399 | vfs_stdfhtovp, | |
400 | vfs_stdcheckexp, | |
401 | vfs_stdvptofh, | |
402 | afs_init, | |
403 | afs_uninit, | |
404 | vfs_stdextattrctl, | |
405 | vfs_stdsysctl, | |
406 | }; | |
407 | #endif |