VFS accounting: implement an initialization framework
[dragonfly.git] / sys / kern / vfs_vfsops.c
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34/*
35 * Implement mp->mnt_ops function call wrappers.
36 *
37 * These wrappers are responsible for handling all MPSAFE issues related to
38 * a mount.
39 */
40
41#include <sys/param.h>
42#include <sys/systm.h>
43#include <sys/buf.h>
44#include <sys/conf.h>
45#include <sys/dirent.h>
46#include <sys/domain.h>
47#include <sys/eventhandler.h>
48#include <sys/fcntl.h>
49#include <sys/kernel.h>
50#include <sys/kthread.h>
51#include <sys/malloc.h>
52#include <sys/mbuf.h>
53#include <sys/mount.h>
54#include <sys/proc.h>
55#include <sys/namei.h>
56#include <sys/reboot.h>
57#include <sys/socket.h>
58#include <sys/stat.h>
59#include <sys/sysctl.h>
60#include <sys/syslog.h>
61#include <sys/vmmeter.h>
62#include <sys/vnode.h>
63#include <sys/vfsops.h>
64#include <sys/sysmsg.h>
65
66#include <machine/limits.h>
67
68#include <vm/vm.h>
69#include <vm/vm_object.h>
70#include <vm/vm_extern.h>
71#include <vm/vm_kern.h>
72#include <vm/pmap.h>
73#include <vm/vm_map.h>
74#include <vm/vm_page.h>
75#include <vm/vm_pager.h>
76#include <vm/vnode_pager.h>
77#include <vm/vm_zone.h>
78
79#include <sys/buf2.h>
80#include <sys/thread2.h>
81#include <sys/mplock2.h>
82
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83/*
84 * MPSAFE
85 */
86int
87vfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
88{
89 VFS_MPLOCK_DECLARE;
90 int error;
91
2247fe02 92 VFS_MPLOCK1(mp);
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93 error = (mp->mnt_op->vfs_mount)(mp, path, data, cred);
94 VFS_MPUNLOCK(mp);
95 return (error);
96}
97
98/*
99 * MPSAFE
100 */
101int
102vfs_start(struct mount *mp, int flags)
103{
104 VFS_MPLOCK_DECLARE;
105 int error;
106
2247fe02 107 VFS_MPLOCK1(mp);
aac0aabd 108 error = (mp->mnt_op->vfs_start)(mp, flags);
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109 if (error == 0)
110 /* do not call vfs_acinit on mount updates */
111 if ((mp->mnt_flag & MNT_UPDATE) == 0)
112 error = (mp->mnt_op->vfs_acinit)(mp);
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113 VFS_MPUNLOCK(mp);
114 return (error);
115}
116
117/*
118 * MPSAFE
119 */
120int
121vfs_unmount(struct mount *mp, int mntflags)
122{
123 VFS_MPLOCK_DECLARE;
124 int error;
125
2247fe02 126 VFS_MPLOCK1(mp);
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127 error = (mp->mnt_op->vfs_acdone)(mp);
128 if (error == 0)
129 error = (mp->mnt_op->vfs_unmount)(mp, mntflags);
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130 VFS_MPUNLOCK(mp);
131 return (error);
132}
133
134/*
135 * MPSAFE
136 */
137int
138vfs_root(struct mount *mp, struct vnode **vpp)
139{
140 VFS_MPLOCK_DECLARE;
141 int error;
142
2247fe02 143 VFS_MPLOCK1(mp);
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144 error = (mp->mnt_op->vfs_root)(mp, vpp);
145 VFS_MPUNLOCK(mp);
146 return (error);
147}
148
149/*
150 * MPSAFE
151 */
152int
153vfs_quotactl(struct mount *mp, int cmds, uid_t uid, caddr_t arg,
154 struct ucred *cred)
155{
156 VFS_MPLOCK_DECLARE;
157 int error;
158
2247fe02 159 VFS_MPLOCK1(mp);
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160 error = (mp->mnt_op->vfs_quotactl)(mp, cmds, uid, arg, cred);
161 VFS_MPUNLOCK(mp);
162 return (error);
163}
164
165/*
166 * MPSAFE
167 */
168int
169vfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
170{
171 VFS_MPLOCK_DECLARE;
172 int error;
173
2247fe02 174 VFS_MPLOCK1(mp);
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175 error = (mp->mnt_op->vfs_statfs)(mp, sbp, cred);
176 VFS_MPUNLOCK(mp);
177 return (error);
178}
179
180int
181vfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred)
182{
183 VFS_MPLOCK_DECLARE;
184 int error;
185
2247fe02 186 VFS_MPLOCK1(mp);
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187 error = (mp->mnt_op->vfs_statvfs)(mp, sbp, cred);
188 VFS_MPUNLOCK(mp);
189 return (error);
190}
191
192/*
193 * MPSAFE
194 */
195int
196vfs_sync(struct mount *mp, int waitfor)
197{
198 VFS_MPLOCK_DECLARE;
199 int error;
200
2247fe02 201 VFS_MPLOCK1(mp);
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202 error = (mp->mnt_op->vfs_sync)(mp, waitfor);
203 VFS_MPUNLOCK(mp);
204 return (error);
205}
206
207/*
208 * MPSAFE
209 */
210int
211vfs_vget(struct mount *mp, struct vnode *dvp, ino_t ino, struct vnode **vpp)
212{
213 VFS_MPLOCK_DECLARE;
214 int error;
215
2247fe02 216 VFS_MPLOCK1(mp);
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217 error = (mp->mnt_op->vfs_vget)(mp, dvp, ino, vpp);
218 VFS_MPUNLOCK(mp);
219 return (error);
220}
221
222/*
223 * MPSAFE
224 */
225int
226vfs_fhtovp(struct mount *mp, struct vnode *rootvp,
227 struct fid *fhp, struct vnode **vpp)
228{
229 VFS_MPLOCK_DECLARE;
230 int error;
231
2247fe02 232 VFS_MPLOCK1(mp);
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233 error = (mp->mnt_op->vfs_fhtovp)(mp, rootvp, fhp, vpp);
234 VFS_MPUNLOCK(mp);
235 return (error);
236}
237
238/*
239 * MPSAFE
240 */
241int
242vfs_checkexp(struct mount *mp, struct sockaddr *nam,
243 int *extflagsp, struct ucred **credanonp)
244{
245 VFS_MPLOCK_DECLARE;
246 int error;
247
2247fe02 248 VFS_MPLOCK1(mp);
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249 error = (mp->mnt_op->vfs_checkexp)(mp, nam, extflagsp, credanonp);
250 VFS_MPUNLOCK(mp);
251 return (error);
252}
253
254/*
255 * MPSAFE
256 */
257int
258vfs_vptofh(struct vnode *vp, struct fid *fhp)
259{
260 VFS_MPLOCK_DECLARE;
261 int error;
262
2247fe02 263 VFS_MPLOCK1(vp->v_mount);
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264 error = (vp->v_mount->mnt_op->vfs_vptofh)(vp, fhp);
265 VFS_MPUNLOCK(vp->v_mount);
266 return (error);
267}
268
269/*
270 * MPSAFE
271 */
272int
273vfs_init(struct vfsconf *vfc)
274{
275 int error;
276
277 get_mplock();
278 error = (vfc->vfc_vfsops->vfs_init)(vfc);
279 rel_mplock();
280
281 return (error);
282}
283
284/*
285 * MPSAFE
286 */
287int
288vfs_uninit(struct vfsconf *vfc, struct vfsconf *vfsp)
289{
290 int error;
291
292 get_mplock();
293 error = (vfc->vfc_vfsops->vfs_uninit)(vfsp);
294 rel_mplock();
295
296 return (error);
297}
298
299/*
300 * MPSAFE
301 */
302int
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303vfs_extattrctl(struct mount *mp, int cmd, struct vnode *vp,
304 int attrnamespace, const char *attrname,
305 struct ucred *cred)
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306{
307 VFS_MPLOCK_DECLARE;
308 int error;
309
2247fe02 310 VFS_MPLOCK1(mp);
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311 error = (mp->mnt_op->vfs_extattrctl)(mp, cmd, vp,
312 attrnamespace, attrname,
313 cred);
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314 VFS_MPUNLOCK(mp);
315 return (error);
316}