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32 * @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/domain.h>
44 #include <sys/filedesc.h>
45 #include <sys/kernel.h>
47 #include <sys/mutex.h>
48 #include <sys/malloc.h>
49 #include <sys/file.h> /* Must come after sys/malloc.h */
50 #include <sys/mount.h>
52 #include <sys/protosw.h>
53 #include <sys/socket.h>
54 #include <sys/socketvar.h>
55 #include <sys/vnode.h>
57 #include <fs/portalfs/portal.h>
59 static MALLOC_DEFINE(M_PORTALFSMNT, "portal_mount", "PORTAL mount structure");
61 static vfs_unmount_t portal_unmount;
62 static vfs_root_t portal_root;
63 static vfs_statfs_t portal_statfs;
65 static const char *portal_opts[] = {
71 portal_cmount(struct mntarg *ma, void *data, int flags, struct thread *td)
73 struct portal_args args;
78 error = copyin(data, &args, sizeof args);
82 ma = mount_argf(ma, "socket", "%d", args.pa_socket);
83 ma = mount_argsu(ma, "config", args.pa_config, MAXPATHLEN);
84 error = kernel_mount(ma, flags);
90 * Mount the per-process file descriptors (/dev/fd)
93 portal_mount(struct mount *mp, struct thread *td)
96 struct portalmount *fmp;
99 struct portalnode *pn;
103 if (vfs_filteropt(mp->mnt_optnew, portal_opts))
106 error = vfs_scanopt(mp->mnt_optnew, "socket", "%d", &v);
109 error = vfs_getopt(mp->mnt_optnew, "config", (void **)&p, NULL);
113 if ((error = fget(td, v, &fp)) != 0)
115 if (fp->f_type != DTYPE_SOCKET) {
119 so = fp->f_data; /* XXX race against userland */
120 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
122 return (ESOCKTNOSUPPORT);
125 MALLOC(pn, struct portalnode *, sizeof(struct portalnode),
128 MALLOC(fmp, struct portalmount *, sizeof(struct portalmount),
129 M_PORTALFSMNT, M_WAITOK); /* XXX */
131 error = getnewvnode("portal", mp, &portal_vnodeops, &rvp); /* XXX */
133 FREE(fmp, M_PORTALFSMNT);
141 rvp->v_vflag |= VV_ROOT;
142 VTOPORTAL(rvp)->pt_arg = 0;
143 VTOPORTAL(rvp)->pt_size = 0;
144 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
149 mp->mnt_flag |= MNT_LOCAL;
150 mp->mnt_data = (qaddr_t) fmp;
153 vfs_mountedfrom(mp, p);
159 portal_unmount(mp, mntflags, td)
164 int error, flags = 0;
167 if (mntflags & MNT_FORCE)
171 * Clear out buffer cache. I don't think we
172 * ever get anything cached at this level at the
173 * moment, but who knows...
177 if (mntinvalbuf(mp, 1))
180 /* There is 1 extra root vnode reference (pm_root). */
181 error = vflush(mp, 1, flags, td);
186 * Shutdown the socket. This will cause the select in the
187 * daemon to wake up, and then the accept will get ECONNABORTED
188 * which it interprets as a request to go and bury itself.
190 soshutdown(VFSTOPORTAL(mp)->pm_server->f_data, 2);
192 * Discard reference to underlying file. Must call closef because
193 * this may be the last reference.
195 closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
197 * Finally, throw away the portalmount structure
199 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
205 portal_root(mp, flags, vpp, td)
214 * Return locked reference to root.
216 vp = VFSTOPORTAL(mp)->pm_root;
218 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
224 portal_statfs(mp, sbp, td)
231 sbp->f_bsize = DEV_BSIZE;
232 sbp->f_iosize = DEV_BSIZE;
233 sbp->f_blocks = 2; /* 1K to keep df happy */
236 sbp->f_files = 1; /* Allow for "." */
237 sbp->f_ffree = 0; /* See comments above */
241 static struct vfsops portal_vfsops = {
242 .vfs_cmount = portal_cmount,
243 .vfs_mount = portal_mount,
244 .vfs_root = portal_root,
245 .vfs_statfs = portal_statfs,
246 .vfs_unmount = portal_unmount,
249 VFS_SET(portal_vfsops, portalfs, VFCF_SYNTHETIC);