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36 * @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
38 * $FreeBSD: src/sys/miscfs/portal/portal_vfsops.c,v 1.26.2.2 2001/07/26 20:37:16 iedowse Exp $
45 #include <sys/param.h>
46 #include <sys/systm.h>
47 #include <sys/kernel.h>
49 #include <sys/filedesc.h>
51 #include <sys/vnode.h>
52 #include <sys/mount.h>
53 #include <sys/malloc.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/protosw.h>
57 #include <sys/domain.h>
60 extern struct vop_ops portal_vnode_vops;
62 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
64 static int portal_mount (struct mount *mp, char *path, caddr_t data,
66 static int portal_unmount (struct mount *mp, int mntflags);
67 static int portal_root (struct mount *mp, struct vnode **vpp);
68 static int portal_statfs (struct mount *mp, struct statfs *sbp,
72 * Mount the per-process file descriptors (/dev/fd)
75 portal_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
78 struct portal_args args;
79 struct portalmount *fmp;
82 struct portalnode *pn;
89 if (mp->mnt_flag & MNT_UPDATE)
92 error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
96 KKASSERT(curproc != NULL);
97 error = holdsock(curproc->p_fd, args.pa_socket, &fp);
100 so = (struct socket *) fp->f_data;
101 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
103 return (ESOCKTNOSUPPORT);
106 pn = kmalloc(sizeof(struct portalnode), M_TEMP, M_WAITOK);
108 fmp = kmalloc(sizeof(struct portalmount), M_PORTALFSMNT, M_WAITOK); /* XXX */
111 vfs_add_vnodeops(mp, &portal_vnode_vops, &mp->mnt_vn_norm_ops);
113 error = getnewvnode(VT_PORTAL, mp, &rvp, 0, 0);
115 kfree(fmp, M_PORTALFSMNT);
123 vsetflags(rvp, VROOT);
124 VTOPORTAL(rvp)->pt_arg = 0;
125 VTOPORTAL(rvp)->pt_size = 0;
126 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
128 fmp->pm_server = fp; fp->f_count++;
130 mp->mnt_flag |= MNT_LOCAL;
131 mp->mnt_data = (qaddr_t) fmp;
134 (void)copyinstr(args.pa_config,
135 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
136 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
139 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
140 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
144 (void)portal_statfs(mp, &mp->mnt_stat, cred);
150 portal_unmount(struct mount *mp, int mntflags)
152 int error, flags = 0;
155 if (mntflags & MNT_FORCE)
159 * Clear out buffer cache. I don't think we
160 * ever get anything cached at this level at the
161 * moment, but who knows...
165 if (mntinvalbuf(mp, 1))
168 /* There is 1 extra root vnode reference (pm_root). */
169 error = vflush(mp, 1, flags);
174 * Shutdown the socket. This will cause the select in the
175 * daemon to wake up, and then the accept will get ECONNABORTED
176 * which it interprets as a request to go and bury itself.
178 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data,
181 * Discard reference to underlying file. Must call closef because
182 * this may be the last reference.
184 closef(VFSTOPORTAL(mp)->pm_server, NULL);
186 * Finally, throw away the portalmount structure
188 kfree(mp->mnt_data, M_PORTALFSMNT); /* XXX */
194 portal_root(struct mount *mp, struct vnode **vpp)
200 * Return locked reference to root.
202 vp = VFSTOPORTAL(mp)->pm_root;
203 error = vget(vp, LK_EXCLUSIVE | LK_RETRY);
210 portal_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
213 sbp->f_bsize = DEV_BSIZE;
214 sbp->f_iosize = DEV_BSIZE;
215 sbp->f_blocks = 2; /* 1K to keep df happy */
218 sbp->f_files = 1; /* Allow for "." */
219 sbp->f_ffree = 0; /* See comments above */
220 if (sbp != &mp->mnt_stat) {
221 sbp->f_type = mp->mnt_vfc->vfc_typenum;
222 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
223 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
228 static struct vfsops portal_vfsops = {
229 .vfs_mount = portal_mount,
230 .vfs_unmount = portal_unmount,
231 .vfs_root = portal_root,
232 .vfs_statfs = portal_statfs,
233 .vfs_sync = vfs_stdsync
236 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);
237 MODULE_VERSION(portal, 1);