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a2907882 KM |
1 | /* |
2 | * Copyright (c) 1989 The Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Rick Macklem at The University of Guelph. | |
7 | * | |
8 | * Redistribution and use in source and binary forms are permitted | |
9 | * provided that the above copyright notice and this paragraph are | |
10 | * duplicated in all such forms and that any documentation, | |
11 | * advertising materials, and other materials related to such | |
12 | * distribution and use acknowledge that the software was developed | |
13 | * by the University of California, Berkeley. The name of the | |
14 | * University may not be used to endorse or promote products derived | |
15 | * from this software without specific prior written permission. | |
16 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
19 | * | |
9238aa59 | 20 | * @(#)nfs_vfsops.c 7.4 (Berkeley) %G% |
a2907882 KM |
21 | */ |
22 | ||
23 | #include "param.h" | |
24 | #include "signal.h" | |
25 | #include "user.h" | |
26 | #include "proc.h" | |
27 | #include "uio.h" | |
28 | #include "ucred.h" | |
36c3043b | 29 | #include "../ufs/dir.h" |
a2907882 KM |
30 | #include "namei.h" |
31 | #include "vnode.h" | |
32 | #include "mount.h" | |
33 | #include "errno.h" | |
34 | #include "malloc.h" | |
35 | #include "mbuf.h" | |
36 | #undef m_data | |
37 | #include "socket.h" | |
38 | #include "socketvar.h" | |
39 | #include "../netinet/in.h" | |
40 | #include "nfsv2.h" | |
41 | #include "nfsnode.h" | |
42 | #include "nfsmount.h" | |
43 | #include "nfs.h" | |
44 | ||
45 | #ifndef shouldbe | |
46 | #include "conf.h" | |
47 | #endif | |
48 | ||
49 | /* | |
50 | * nfs vfs operations. | |
51 | */ | |
52 | int nfs_mount(); | |
b3226026 | 53 | int nfs_start(); |
a2907882 KM |
54 | int nfs_unmount(); |
55 | int nfs_root(); | |
56 | extern int nfs_statfs(); | |
57 | int nfs_sync(); | |
58 | int nfs_fhtovp(); | |
59 | int nfs_vptofh(); | |
60 | ||
61 | struct vfsops nfs_vfsops = { | |
62 | nfs_mount, | |
b3226026 | 63 | nfs_start, |
a2907882 KM |
64 | nfs_unmount, |
65 | nfs_root, | |
66 | nfs_statfs, | |
67 | nfs_sync, | |
68 | nfs_fhtovp, | |
69 | nfs_vptofh, | |
70 | }; | |
71 | ||
72 | extern struct nfsreq nfsreqh; | |
73 | static long nfs_mntid; | |
74 | ||
75 | /* | |
76 | * Called by vfs_mountroot when nfs is going to be mounted as root | |
77 | * Not Yet (By a LONG shot) | |
78 | */ | |
79 | nfs_mountroot() | |
80 | { | |
81 | return (ENODEV); | |
82 | } | |
83 | ||
84 | /* | |
85 | * VFS Operations. | |
86 | * | |
87 | * mount system call | |
88 | * It seems a bit dumb to copyinstr() the host and path here and then | |
89 | * bcopy() them in mountnfs(), but I wanted to detect errors before | |
90 | * doing the sockargs() call because sockargs() allocates an mbuf and | |
91 | * an error after that means that I have to release the mbuf. | |
92 | */ | |
93 | nfs_mount(mp, path, data, ndp) | |
94 | struct mount *mp; | |
95 | char *path; | |
96 | caddr_t data; | |
97 | struct nameidata *ndp; | |
98 | { | |
99 | int error; | |
100 | struct nfs_args args; | |
101 | struct mbuf *saddr; | |
102 | char pth[MNAMELEN], hst[MNAMELEN]; | |
103 | int len; | |
104 | nfsv2fh_t nfh; | |
105 | ||
106 | if (error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args))) | |
107 | return (error); | |
108 | if (error=copyin((caddr_t)args.fh, (caddr_t)&nfh, sizeof (nfsv2fh_t))) | |
109 | return (error); | |
110 | if (error = copyinstr(path, pth, MNAMELEN-1, &len)) | |
111 | return (error); | |
112 | bzero(&pth[len], MNAMELEN-len); | |
113 | if (error = copyinstr(args.hostname, hst, MNAMELEN-1, &len)) | |
114 | return (error); | |
115 | bzero(&hst[len], MNAMELEN-len); | |
116 | /* sockargs() call must be after above copyin() calls */ | |
117 | if (error = sockargs(&saddr, (caddr_t)args.addr, | |
118 | sizeof (struct sockaddr_in), MT_SONAME)) | |
119 | return (error); | |
120 | args.fh = &nfh; | |
121 | error = mountnfs(&args, mp, saddr, pth, hst); | |
122 | return (error); | |
123 | } | |
124 | ||
125 | /* | |
126 | * Common code for mount and mountroot | |
127 | */ | |
128 | mountnfs(argp, mp, saddr, pth, hst) | |
129 | register struct nfs_args *argp; | |
130 | register struct mount *mp; | |
131 | register struct mbuf *saddr; | |
132 | char *pth, *hst; | |
133 | { | |
134 | register struct nfsmount *nmp; | |
135 | struct nfsnode *np; | |
36c3043b | 136 | #ifdef notdef |
a2907882 | 137 | struct statfs statf, *sbp; |
36c3043b | 138 | #endif |
a2907882 KM |
139 | int error; |
140 | ||
141 | nmp = (struct nfsmount *)malloc(sizeof (struct nfsmount), M_NFSMNT, | |
142 | M_WAITOK); | |
143 | mp->m_data = (qaddr_t)nmp; | |
144 | mp->m_fsid.val[0] = ++nfs_mntid; | |
145 | mp->m_fsid.val[1] = MOUNT_NFS; | |
146 | nmp->nm_mountp = mp; | |
147 | nmp->nm_flag = argp->flags; | |
148 | nmp->nm_sockaddr = saddr; | |
149 | /* Set up the sockets */ | |
150 | if (error = socreate(AF_INET, &nmp->nm_so, SOCK_DGRAM, 0)) | |
151 | goto bad; | |
152 | if (error = soconnect(nmp->nm_so, saddr)) | |
153 | goto bad; | |
154 | if ((argp->flags & NFSMNT_TIMEO) && argp->timeo >= 1) | |
155 | nmp->nm_timeo = argp->timeo; | |
156 | else | |
157 | nmp->nm_timeo = NFS_TIMEO; | |
158 | if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 0) | |
159 | nmp->nm_retrans = argp->retrans; | |
160 | else | |
161 | nmp->nm_retrans = NFS_RETRANS; | |
162 | if ((argp->flags & NFSMNT_WSIZE) && | |
163 | argp->wsize <= NFS_MAXDATA && argp->wsize > 0 && | |
164 | (argp->wsize & 0x1ff) == 0) | |
165 | nmp->nm_wsize = argp->wsize; | |
166 | else | |
167 | nmp->nm_wsize = NFS_WSIZE; | |
168 | if ((argp->flags & NFSMNT_RSIZE) && | |
169 | argp->rsize <= NFS_MAXDATA && argp->rsize > 0 && | |
170 | (argp->rsize & 0x1ff) == 0) | |
171 | nmp->nm_rsize = argp->rsize; | |
172 | else | |
173 | nmp->nm_rsize = NFS_RSIZE; | |
174 | bcopy((caddr_t)argp->fh, (caddr_t)&nmp->nm_fh, sizeof(nfsv2fh_t)); | |
175 | bcopy(pth, nmp->nm_path, MNAMELEN); | |
176 | bcopy(hst, nmp->nm_host, MNAMELEN); | |
36c3043b | 177 | #ifdef notdef |
a2907882 KM |
178 | sbp = &statf; |
179 | /* | |
180 | * Kludge City... | |
181 | * To do an interruptable hard mount, turn it into a soft mount | |
182 | * with a retry limit of one and then repeat it so long as it | |
183 | * times out and there is no pending signal for the process. | |
184 | * It is tempting to just let nfs_statfs() sleep at positive | |
185 | * prio, but then you would long jump out without taking the | |
186 | * mount structure back out of the list. | |
187 | * NB: NFSMNT_INT must NEVER be set for nfs_mountroot(), since | |
188 | * the process context is not yet built!! | |
189 | */ | |
190 | if ((argp->flags && NFSMNT_INT) && (argp->flags & NFSMNT_SOFT) == 0) { | |
191 | int savretrans; | |
192 | ||
193 | nmp->nm_flag |= NFSMNT_SOFT; | |
194 | savretrans = nmp->nm_retrans; | |
195 | nmp->nm_retrans = 1; | |
196 | do { | |
197 | error = nfs_statfs(mp, sbp); | |
198 | } while (error == ETIMEDOUT && (u.u_procp->p_sig & | |
199 | (sigmask(SIGINT)|sigmask(SIGQUIT)|sigmask(SIGTERM)| | |
200 | sigmask(SIGKILL))) == 0); | |
201 | nmp->nm_retrans = savretrans; | |
202 | nmp->nm_flag &= ~NFSMNT_SOFT; | |
203 | if (error) | |
204 | goto bad; | |
205 | } else if (error = nfs_statfs(mp, sbp)) | |
206 | goto bad; | |
207 | mp->m_fsize = sbp->f_fsize; | |
208 | ||
209 | /* | |
210 | * If the block size is not an exact multiple of CLBYTES | |
211 | * use CLBYTES so that paging in ZMAGIC executables doesn't | |
212 | * get sick. (It is used by vinitfod()) | |
213 | */ | |
214 | if (sbp->f_bsize >= CLBYTES && claligned(sbp->f_bsize)) | |
215 | mp->m_bsize = sbp->f_bsize; | |
216 | else | |
217 | mp->m_bsize = CLBYTES; | |
36c3043b KM |
218 | #else |
219 | /* | |
220 | * Set to CLBYTES so that vinifod() doesn't get confused. | |
221 | * Actually any exact multiple of CLBYTES will do | |
222 | */ | |
223 | mp->m_bsize = mp->m_fsize = CLBYTES; | |
224 | #endif | |
a2907882 KM |
225 | return (0); |
226 | bad: | |
227 | m_freem(saddr); | |
228 | free((caddr_t)nmp, M_NFSMNT); | |
229 | return (error); | |
230 | } | |
231 | ||
232 | /* | |
233 | * unmount system call | |
234 | */ | |
235 | nfs_unmount(mp, flags) | |
236 | struct mount *mp; | |
237 | int flags; | |
238 | { | |
239 | register struct nfsmount *nmp; | |
240 | register struct nfsreq *rep; | |
241 | struct nfsreq *rep2; | |
242 | int error; | |
243 | int s; | |
244 | ||
245 | if (flags & MNT_FORCE) | |
246 | return (EINVAL); | |
247 | nmp = vfs_to_nfs(mp); | |
9238aa59 RM |
248 | /* |
249 | * Clear out the buffer cache | |
250 | */ | |
251 | bflush(mp); | |
252 | if (binval(mp)) | |
253 | return (EBUSY); | |
a2907882 KM |
254 | /* |
255 | * Goes something like this.. | |
256 | * - Call nfs_nflush() to clear out the nfsnode table | |
257 | * - Flush out lookup cache | |
258 | * - Close the socket | |
259 | * - Free up the data structures | |
260 | */ | |
261 | if (error = nfs_nflush(mp)) { | |
262 | return (error); | |
263 | } | |
264 | /* | |
265 | * Scan the request list for any requests left hanging about | |
266 | */ | |
267 | s = splnet(); | |
268 | rep = nfsreqh.r_next; | |
269 | while (rep) { | |
270 | if (rep->r_mntp == nmp) { | |
271 | rep->r_prev->r_next = rep2 = rep->r_next; | |
272 | if (rep->r_next != NULL) | |
273 | rep->r_next->r_prev = rep->r_prev; | |
274 | m_freem(rep->r_mreq); | |
275 | if (rep->r_mrep != NULL) | |
276 | m_freem(rep->r_mrep); | |
277 | free((caddr_t)rep, M_NFSREQ); | |
278 | rep = rep2; | |
279 | } else | |
280 | rep = rep->r_next; | |
281 | } | |
282 | splx(s); | |
283 | soclose(nmp->nm_so); | |
284 | m_freem(nmp->nm_sockaddr); | |
285 | free((caddr_t)nmp, M_NFSMNT); | |
286 | return (0); | |
287 | } | |
288 | ||
289 | /* | |
290 | * Return root of a filesystem | |
291 | */ | |
292 | nfs_root(mp, vpp) | |
293 | struct mount *mp; | |
294 | struct vnode **vpp; | |
295 | { | |
296 | register struct vnode *vp; | |
297 | struct nfsmount *nmp; | |
298 | struct nfsnode *np; | |
299 | int error; | |
300 | ||
301 | nmp = vfs_to_nfs(mp); | |
302 | if (error = nfs_nget(mp, &nmp->nm_fh, &np)) | |
303 | return (error); | |
304 | vp = NFSTOV(np); | |
305 | vp->v_type = VDIR; | |
306 | vp->v_flag = VROOT; | |
307 | *vpp = vp; | |
308 | return (0); | |
309 | } | |
310 | ||
9238aa59 RM |
311 | extern int syncprt; |
312 | ||
a2907882 | 313 | /* |
9238aa59 | 314 | * Flush out the buffer cache |
a2907882 KM |
315 | */ |
316 | nfs_sync(mp, waitfor) | |
317 | struct mount *mp; | |
318 | int waitfor; | |
319 | { | |
9238aa59 RM |
320 | if (syncprt) |
321 | bufstats(); | |
322 | /* | |
323 | * Force stale buffer cache information to be flushed. | |
324 | */ | |
325 | bflush(mp); | |
a2907882 KM |
326 | return (0); |
327 | } | |
328 | ||
329 | /* | |
330 | * At this point, this should never happen | |
331 | */ | |
332 | nfs_fhtovp(mp, fhp, vpp) | |
333 | struct mount *mp; | |
334 | struct fid *fhp; | |
335 | struct vnode **vpp; | |
336 | { | |
337 | return (EINVAL); | |
338 | } | |
339 | ||
340 | /* | |
341 | * Vnode pointer to File handle, should never happen either | |
342 | */ | |
343 | nfs_vptofh(mp, fhp, vpp) | |
344 | struct mount *mp; | |
345 | struct fid *fhp; | |
346 | struct vnode **vpp; | |
347 | { | |
348 | return (EINVAL); | |
349 | } | |
9238aa59 RM |
350 | |
351 | /* | |
352 | * Vfs start routine, a no-op. | |
353 | */ | |
354 | nfs_start(mp, flags) | |
355 | struct mount *mp; | |
356 | int flags; | |
357 | { | |
358 | return (0); | |
359 | } |