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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 1.13 2004/10/12 19:21:06 dillon 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 extern struct vnodeopv_entry_desc portal_vnodeop_entries[];
63 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
65 static int portal_mount (struct mount *mp, char *path, caddr_t data,
67 static int portal_unmount (struct mount *mp, int mntflags,
69 static int portal_root (struct mount *mp, struct vnode **vpp);
70 static int portal_statfs (struct mount *mp, struct statfs *sbp,
74 * Mount the per-process file descriptors (/dev/fd)
77 portal_mount(struct mount *mp, char *path, caddr_t data, struct thread *td)
80 struct portal_args args;
81 struct portalmount *fmp;
84 struct portalnode *pn;
91 if (mp->mnt_flag & MNT_UPDATE)
94 error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
98 KKASSERT(td->td_proc);
99 error = holdsock(td->td_proc->p_fd, args.pa_socket, &fp);
102 so = (struct socket *) fp->f_data;
103 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
105 return (ESOCKTNOSUPPORT);
108 MALLOC(pn, struct portalnode *, sizeof(struct portalnode),
111 MALLOC(fmp, struct portalmount *, sizeof(struct portalmount),
112 M_PORTALFSMNT, M_WAITOK); /* XXX */
115 vfs_add_vnodeops(&mp->mnt_vn_ops, portal_vnodeop_entries);
117 error = getnewvnode(VT_PORTAL, mp, mp->mnt_vn_ops, &rvp, 0, 0);
119 FREE(fmp, M_PORTALFSMNT);
127 rvp->v_flag |= VROOT;
128 VTOPORTAL(rvp)->pt_arg = 0;
129 VTOPORTAL(rvp)->pt_size = 0;
130 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
132 fmp->pm_server = fp; fp->f_count++;
134 mp->mnt_flag |= MNT_LOCAL;
135 mp->mnt_data = (qaddr_t) fmp;
138 (void)copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
139 bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
140 (void)copyinstr(args.pa_config,
141 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
142 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
145 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
146 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
150 (void)portal_statfs(mp, &mp->mnt_stat, td);
156 portal_unmount(struct mount *mp, int mntflags, struct thread *td)
158 int error, flags = 0;
161 if (mntflags & MNT_FORCE)
165 * Clear out buffer cache. I don't think we
166 * ever get anything cached at this level at the
167 * moment, but who knows...
171 if (mntinvalbuf(mp, 1))
174 /* There is 1 extra root vnode reference (pm_root). */
175 error = vflush(mp, 1, flags);
180 * Shutdown the socket. This will cause the select in the
181 * daemon to wake up, and then the accept will get ECONNABORTED
182 * which it interprets as a request to go and bury itself.
184 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
186 * Discard reference to underlying file. Must call closef because
187 * this may be the last reference.
189 closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
191 * Finally, throw away the portalmount structure
193 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
199 portal_root(struct mount *mp, struct vnode **vpp)
201 struct thread *td = curthread; /* XXX */
205 * Return locked reference to root.
207 vp = VFSTOPORTAL(mp)->pm_root;
209 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
215 portal_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
219 sbp->f_bsize = DEV_BSIZE;
220 sbp->f_iosize = DEV_BSIZE;
221 sbp->f_blocks = 2; /* 1K to keep df happy */
224 sbp->f_files = 1; /* Allow for "." */
225 sbp->f_ffree = 0; /* See comments above */
226 if (sbp != &mp->mnt_stat) {
227 sbp->f_type = mp->mnt_vfc->vfc_typenum;
228 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
229 bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
230 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
235 static struct vfsops portal_vfsops = {
252 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);