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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: /* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
26: /*
27: * Copyright (c) 1989, 1990, 1993, 1994
28: * The Regents of the University of California. All rights reserved.
29: *
30: * Redistribution and use in source and binary forms, with or without
31: * modification, are permitted provided that the following conditions
32: * are met:
33: * 1. Redistributions of source code must retain the above copyright
34: * notice, this list of conditions and the following disclaimer.
35: * 2. Redistributions in binary form must reproduce the above copyright
36: * notice, this list of conditions and the following disclaimer in the
37: * documentation and/or other materials provided with the distribution.
38: * 3. All advertising materials mentioning features or use of this software
39: * must display the following acknowledgement:
40: * This product includes software developed by the University of
41: * California, Berkeley and its contributors.
42: * 4. Neither the name of the University nor the names of its contributors
43: * may be used to endorse or promote products derived from this software
44: * without specific prior written permission.
45: *
46: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
47: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
48: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
49: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
50: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
51: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
52: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
53: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
54: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
55: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
56: * SUCH DAMAGE.
57: *
58: * @(#)mfs_vfsops.c 8.4 (Berkeley) 4/16/94
59: */
60:
61: #include <sys/param.h>
62: #include <sys/systm.h>
63: #include <sys/time.h>
64: #include <sys/kernel.h>
65: #include <sys/proc.h>
66: #include <sys/buf.h>
67: #include <sys/mount.h>
68: #include <sys/signalvar.h>
69: #include <sys/vnode.h>
70: #include <sys/malloc.h>
71:
72: #include <ufs/ufs/quota.h>
73: #include <ufs/ufs/inode.h>
74: #include <ufs/ufs/ufsmount.h>
75: #include <ufs/ufs/ufs_extern.h>
76:
77: #include <ufs/ffs/fs.h>
78: #include <ufs/ffs/ffs_extern.h>
79:
80: #include <ufs/mfs/mfsnode.h>
81: #include <ufs/mfs/mfs_extern.h>
82:
83: caddr_t mfs_rootbase; /* address of mini-root in kernel virtual memory */
84: u_long mfs_rootsize; /* size of mini-root in bytes */
85:
86: static int mfs_minor; /* used for building internal dev_t */
87:
88: extern int (**mfs_vnodeop_p)();
89:
90: /*
91: * mfs vfs operations.
92: */
93: struct vfsops mfs_vfsops = {
94: MOUNT_MFS,
95: mfs_mount,
96: mfs_start,
97: ffs_unmount,
98: ufs_root,
99: ufs_quotactl,
100: mfs_statfs,
101: ffs_sync,
102: ffs_vget,
103: ffs_fhtovp,
104: ffs_vptofh,
105: mfs_init,
106: };
107:
108: /*
109: * Called by main() when mfs is going to be mounted as root.
110: *
111: * Name is updated by mount(8) after booting.
112: */
113: #define ROOTNAME "mfs_root"
114:
115: mfs_mountroot()
116: {
117: extern struct vnode *rootvp;
118: register struct fs *fs;
119: register struct mount *mp;
120: struct proc *p = kernel_proc; /* XXX - WMG*/
121: struct ufsmount *ump;
122: struct mfsnode *mfsp;
123: size_t size;
124: int error;
125:
126: /*
127: * Get vnodes for swapdev and rootdev.
128: */
129: #if 0
130: if (bdevvp(swapdev, &swapdev_vp) || bdevvp(rootdev, &rootvp))
131: panic("mfs_mountroot: can't setup bdevvp's");
132: #else
133: if ( bdevvp(rootdev, &rootvp))
134: panic("mfs_mountroot: can't setup bdevvp's");
135:
136: #endif
137: MALLOC_ZONE(mp, struct mount *,
138: sizeof(struct mount), M_MOUNT, M_WAITOK);
139: bzero((char *)mp, (u_long)sizeof(struct mount));
140: mp->mnt_op = &mfs_vfsops;
141: mp->mnt_flag = MNT_RDONLY;
142: MALLOC(mfsp, struct mfsnode *, sizeof(struct mfsnode), M_MFSNODE, M_WAITOK);
143: rootvp->v_data = mfsp;
144: rootvp->v_op = mfs_vnodeop_p;
145: rootvp->v_tag = VT_MFS;
146: mfsp->mfs_baseoff = mfs_rootbase;
147: mfsp->mfs_size = mfs_rootsize;
148: mfsp->mfs_vnode = rootvp;
149: mfsp->mfs_pid = p->p_pid;
150: mfsp->mfs_buflist = (struct buf *)0;
151: if (error = ffs_mountfs(rootvp, mp, p)) {
152: _FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
153: _FREE(mfsp, M_MFSNODE);
154: return (error);
155: }
156: if (error = vfs_lock(mp)) {
157: (void)ffs_unmount(mp, 0, p);
158: _FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
159: _FREE(mfsp, M_MFSNODE);
160: return (error);
161: }
162: CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
163: mp->mnt_vnodecovered = NULLVP;
164: ump = VFSTOUFS(mp);
165: fs = ump->um_fs;
166: bzero(fs->fs_fsmnt, sizeof(fs->fs_fsmnt));
167: fs->fs_fsmnt[0] = '/';
168: bcopy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MNAMELEN);
169: (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
170: &size);
171: bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
172: (void)ffs_statfs(mp, &mp->mnt_stat, p);
173: vfs_unlock(mp);
174: inittodr((time_t)0);
175: return (0);
176: }
177:
178: /*
179: * This is called early in boot to set the base address and size
180: * of the mini-root.
181: */
182: mfs_initminiroot(base)
183: caddr_t base;
184: {
185: struct fs *fs = (struct fs *)(base + SBOFF);
186: extern int (*mountroot)();
187:
188: /* check for valid super block */
189: if (fs->fs_magic != FS_MAGIC || fs->fs_bsize > MAXBSIZE ||
190: fs->fs_bsize < sizeof(struct fs))
191: return (0);
192: mountroot = mfs_mountroot;
193: mfs_rootbase = base;
194: mfs_rootsize = fs->fs_fsize * fs->fs_size;
195: rootdev = makedev(255, mfs_minor++);
196: return (mfs_rootsize);
197: }
198:
199: /*
200: * VFS Operations.
201: *
202: * mount system call
203: */
204: /* ARGSUSED */
205: int
206: mfs_mount(mp, path, data, ndp, p)
207: register struct mount *mp;
208: char *path;
209: caddr_t data;
210: struct nameidata *ndp;
211: struct proc *p;
212: {
213: struct vnode *devvp;
214: struct mfs_args args;
215: struct ufsmount *ump;
216: register struct fs *fs;
217: register struct mfsnode *mfsp;
218: size_t size;
219: int flags, error;
220:
221: if (error = copyin(data, (caddr_t)&args, sizeof (struct mfs_args)))
222: return (error);
223:
224: /*
225: * If updating, check whether changing from read-only to
226: * read/write; if there is no device name, that's all we do.
227: */
228: if (mp->mnt_flag & MNT_UPDATE) {
229: ump = VFSTOUFS(mp);
230: fs = ump->um_fs;
231: if (fs->fs_ronly == 0 && (mp->mnt_flag & MNT_RDONLY)) {
232: flags = WRITECLOSE;
233: if (mp->mnt_flag & MNT_FORCE)
234: flags |= FORCECLOSE;
235: if (vfs_busy(mp))
236: return (EBUSY);
237: error = ffs_flushfiles(mp, flags, p);
238: vfs_unbusy(mp);
239: if (error)
240: return (error);
241: }
242: if (fs->fs_ronly && (mp->mnt_flag & MNT_WANTRDWR))
243: fs->fs_ronly = 0;
244: #ifdef EXPORTMFS
245: if (args.fspec == 0)
246: return (vfs_export(mp, &ump->um_export, &args.export));
247: #endif
248: return (0);
249: }
250: error = getnewvnode(VT_MFS, (struct mount *)0, mfs_vnodeop_p, &devvp);
251: if (error)
252: return (error);
253: devvp->v_type = VBLK;
254: if (checkalias(devvp, makedev(255, mfs_minor++), (struct mount *)0))
255: panic("mfs_mount: dup dev");
256: // mfsp = (struct mfsnode *)malloc(sizeof *mfsp, M_MFSNODE, M_WAITOK);
257: MALLOC(mfsp, struct mfsnode *, sizeof(struct mfsnode), M_MFSNODE, M_WAITOK);
258: devvp->v_data = mfsp;
259: mfsp->mfs_baseoff = args.base;
260: mfsp->mfs_size = args.size;
261: mfsp->mfs_vnode = devvp;
262: mfsp->mfs_pid = p->p_pid;
263: mfsp->mfs_buflist = (struct buf *)0;
264: if (error = ffs_mountfs(devvp, mp, p)) {
265: mfsp->mfs_buflist = (struct buf *)-1;
266: vrele(devvp);
267: return (error);
268: }
269: ump = VFSTOUFS(mp);
270: fs = ump->um_fs;
271: (void) copyinstr(path, fs->fs_fsmnt, sizeof(fs->fs_fsmnt) - 1, &size);
272: bzero(fs->fs_fsmnt + size, sizeof(fs->fs_fsmnt) - size);
273: bcopy(fs->fs_fsmnt, mp->mnt_stat.f_mntonname, MNAMELEN);
274: (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
275: &size);
276: bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
277: return (0);
278: }
279:
280: int mfs_pri = PWAIT | PCATCH; /* XXX prob. temp */
281:
282: /*
283: * Used to grab the process and keep it in the kernel to service
284: * memory filesystem I/O requests.
285: *
286: * Loop servicing I/O requests.
287: * Copy the requested data into or out of the memory filesystem
288: * address space.
289: */
290: /* ARGSUSED */
291: int
292: mfs_start(mp, flags, p)
293: struct mount *mp;
294: int flags;
295: struct proc *p;
296: {
297: register struct vnode *vp = VFSTOUFS(mp)->um_devvp;
298: register struct mfsnode *mfsp = VTOMFS(vp);
299: register struct buf *bp;
300: register caddr_t base;
301: int error = 0;
302:
303: base = mfsp->mfs_baseoff;
304: while (mfsp->mfs_buflist != (struct buf *)(-1)) {
305: while (bp = mfsp->mfs_buflist) {
306: mfsp->mfs_buflist = bp->b_actf;
307: mfs_doio(bp, base);
308: wakeup((caddr_t)bp);
309: }
310: /*
311: * If a non-ignored signal is received, try to unmount.
312: * If that fails, clear the signal (it has been "processed"),
313: * otherwise we will loop here, as tsleep will always return
314: * EINTR/ERESTART.
315: */
316: if (error = tsleep((caddr_t)vp, mfs_pri, "mfsidl", 0))
317: if (dounmount(mp, 0, p) != 0)
318: CLRSIG(p, CURSIG(p));
319: }
320: return (error);
321: }
322:
323: /*
324: * Get file system statistics.
325: */
326: mfs_statfs(mp, sbp, p)
327: struct mount *mp;
328: struct statfs *sbp;
329: struct proc *p;
330: {
331: int error;
332:
333: error = ffs_statfs(mp, sbp, p);
334: #ifdef COMPAT_09
335: sbp->f_type = 3;
336: #else
337: sbp->f_type = 0;
338: #endif
339: strncpy(&sbp->f_fstypename[0], mp->mnt_op->vfs_name, MFSNAMELEN);
340: sbp->f_fstypename[MFSNAMELEN] = '\0';
341: return (error);
342: }
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