2 * Copyright (c) 2004 Poul-Henning Kamp
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
33 #include <sys/kernel.h>
34 #include <sys/malloc.h>
35 #include <sys/vnode.h>
36 #include <sys/mount.h> /* XXX Temporary for VFS_LOCK_GIANT */
38 #include <geom/geom.h>
39 #include <geom/geom_vfs.h>
42 * subroutines for use by filesystems.
44 * XXX: should maybe live somewhere else ?
48 static struct buf_ops __g_vfs_bufops = {
49 .bop_name = "GEOM_VFS",
50 .bop_write = bufwrite,
51 .bop_strategy = g_vfs_strategy,
55 struct buf_ops *g_vfs_bufops = &__g_vfs_bufops;
57 static g_orphan_t g_vfs_orphan;
59 static struct g_class g_vfs_class = {
62 .orphan = g_vfs_orphan,
65 DECLARE_GEOM_CLASS(g_vfs_class, g_vfs);
68 g_vfs_done(struct bio *bip)
74 printf("g_vfs_done():");
76 printf("error = %d\n", bip->bio_error);
78 bp = bip->bio_caller2;
79 bp->b_error = bip->bio_error;
80 bp->b_ioflags = bip->bio_flags;
82 bp->b_ioflags |= BIO_ERROR;
83 bp->b_resid = bp->b_bcount - bip->bio_completed;
85 vfslocked = VFS_LOCK_GIANT(((struct mount *)NULL));
87 VFS_UNLOCK_GIANT(vfslocked);
91 g_vfs_strategy(struct bufobj *bo, struct buf *bp)
93 struct g_consumer *cp;
100 bip->bio_cmd = bp->b_iocmd;
101 bip->bio_offset = bp->b_iooffset;
102 bip->bio_data = bp->b_data;
103 bip->bio_done = g_vfs_done;
104 bip->bio_caller2 = bp;
105 bip->bio_length = bp->b_bcount;
106 g_io_request(bip, cp);
110 g_vfs_orphan(struct g_consumer *cp)
114 * Don't do anything here yet.
116 * Ideally we should detach the consumer already now, but that
117 * leads to a locking requirement in the I/O path to see if we have
118 * a consumer or not. Considering how ugly things are going to get
119 * anyway as none of our filesystems are graceful about i/o errors,
120 * this is not important right now.
122 * Down the road, this is the place where we could give the user
123 * a "Abort, Retry or Ignore" option to replace the media again.
128 g_vfs_open(struct vnode *vp, struct g_consumer **cpp, const char *fsname, int wr)
131 struct g_provider *pp;
132 struct g_consumer *cp;
139 pp = g_dev_getprovider(vp->v_rdev);
142 gp = g_new_geomf(&g_vfs_class, "%s.%s", fsname, pp->name);
143 cp = g_new_consumer(gp);
145 error = g_access(cp, 1, wr, 1);
147 g_wither_geom(gp, ENXIO);
150 vnode_create_vobject(vp, pp->mediasize, curthread);
153 bo->bo_ops = g_vfs_bufops;
155 bo->bo_bsize = pp->sectorsize;
161 g_vfs_close(struct g_consumer *cp, struct thread *td)
168 g_wither_geom_close(gp, ENXIO);