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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 $
39 * $DragonFly: src/sys/vfs/portal/portal_vfsops.c,v 1.8 2004/04/24 04:32:05 drhodus Exp $
46 #include <sys/param.h>
47 #include <sys/systm.h>
48 #include <sys/kernel.h>
50 #include <sys/filedesc.h>
52 #include <sys/vnode.h>
53 #include <sys/mount.h>
54 #include <sys/malloc.h>
55 #include <sys/socket.h>
56 #include <sys/socketvar.h>
57 #include <sys/protosw.h>
58 #include <sys/domain.h>
61 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
63 static int portal_mount (struct mount *mp, char *path, caddr_t data,
64 struct nameidata *ndp, struct thread *td);
65 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 nameidata *ndp,
79 struct portal_args args;
80 struct portalmount *fmp;
83 struct portalnode *pn;
90 if (mp->mnt_flag & MNT_UPDATE)
93 error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
97 KKASSERT(td->td_proc);
98 error = holdsock(td->td_proc->p_fd, args.pa_socket, &fp);
101 so = (struct socket *) fp->f_data;
102 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
104 return (ESOCKTNOSUPPORT);
107 MALLOC(pn, struct portalnode *, sizeof(struct portalnode),
110 MALLOC(fmp, struct portalmount *, sizeof(struct portalmount),
111 M_PORTALFSMNT, M_WAITOK); /* XXX */
113 error = getnewvnode(VT_PORTAL, mp, portal_vnodeop_p, &rvp); /* XXX */
115 FREE(fmp, M_PORTALFSMNT);
123 rvp->v_flag |= 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(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
135 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
136 (void)copyinstr(args.pa_config,
137 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
138 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
141 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
142 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
145 (void)portal_statfs(mp, &mp->mnt_stat, td);
151 portal_unmount(struct mount *mp, int mntflags, struct thread *td)
153 int error, flags = 0;
156 if (mntflags & MNT_FORCE)
160 * Clear out buffer cache. I don't think we
161 * ever get anything cached at this level at the
162 * moment, but who knows...
166 if (mntinvalbuf(mp, 1))
169 /* There is 1 extra root vnode reference (pm_root). */
170 error = vflush(mp, 1, flags);
175 * Shutdown the socket. This will cause the select in the
176 * daemon to wake up, and then the accept will get ECONNABORTED
177 * which it interprets as a request to go and bury itself.
179 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
181 * Discard reference to underlying file. Must call closef because
182 * this may be the last reference.
184 closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
186 * Finally, throw away the portalmount structure
188 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
194 portal_root(struct mount *mp, struct vnode **vpp)
196 struct thread *td = curthread; /* XXX */
200 * Return locked reference to root.
202 vp = VFSTOPORTAL(mp)->pm_root;
204 vn_lock(vp, NULL, LK_EXCLUSIVE | LK_RETRY, td);
210 portal_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
214 sbp->f_bsize = DEV_BSIZE;
215 sbp->f_iosize = DEV_BSIZE;
216 sbp->f_blocks = 2; /* 1K to keep df happy */
219 sbp->f_files = 1; /* Allow for "." */
220 sbp->f_ffree = 0; /* See comments above */
221 if (sbp != &mp->mnt_stat) {
222 sbp->f_type = mp->mnt_vfc->vfc_typenum;
223 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
224 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
225 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
230 static struct vfsops portal_vfsops = {
247 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);