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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 1.17 2005/09/17 07:43:12 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, &mp->mnt_vn_norm_ops,
116 portal_vnodeop_entries, 0);
118 error = getnewvnode(VT_PORTAL, mp, &rvp, 0, 0);
120 FREE(fmp, M_PORTALFSMNT);
128 rvp->v_flag |= VROOT;
129 VTOPORTAL(rvp)->pt_arg = 0;
130 VTOPORTAL(rvp)->pt_size = 0;
131 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
133 fmp->pm_server = fp; fp->f_count++;
135 mp->mnt_flag |= MNT_LOCAL;
136 mp->mnt_data = (qaddr_t) fmp;
139 (void)copyinstr(args.pa_config,
140 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
141 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
144 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
145 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
149 (void)portal_statfs(mp, &mp->mnt_stat, td);
155 portal_unmount(struct mount *mp, int mntflags, struct thread *td)
157 int error, flags = 0;
160 if (mntflags & MNT_FORCE)
164 * Clear out buffer cache. I don't think we
165 * ever get anything cached at this level at the
166 * moment, but who knows...
170 if (mntinvalbuf(mp, 1))
173 /* There is 1 extra root vnode reference (pm_root). */
174 error = vflush(mp, 1, flags);
179 * Shutdown the socket. This will cause the select in the
180 * daemon to wake up, and then the accept will get ECONNABORTED
181 * which it interprets as a request to go and bury itself.
183 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data, 2);
185 * Discard reference to underlying file. Must call closef because
186 * this may be the last reference.
188 closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
190 * Finally, throw away the portalmount structure
192 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
198 portal_root(struct mount *mp, struct vnode **vpp)
200 struct thread *td = curthread; /* XXX */
204 * Return locked reference to root.
206 vp = VFSTOPORTAL(mp)->pm_root;
208 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
214 portal_statfs(struct mount *mp, struct statfs *sbp, struct thread *td)
218 sbp->f_bsize = DEV_BSIZE;
219 sbp->f_iosize = DEV_BSIZE;
220 sbp->f_blocks = 2; /* 1K to keep df happy */
223 sbp->f_files = 1; /* Allow for "." */
224 sbp->f_ffree = 0; /* See comments above */
225 if (sbp != &mp->mnt_stat) {
226 sbp->f_type = mp->mnt_vfc->vfc_typenum;
227 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
228 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
233 static struct vfsops portal_vfsops = {
234 .vfs_mount = portal_mount,
235 .vfs_unmount = portal_unmount,
236 .vfs_root = portal_root,
237 .vfs_statfs = portal_statfs,
238 .vfs_sync = vfs_stdsync
241 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);