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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/capability.h>
44 #include <sys/domain.h>
45 #include <sys/filedesc.h>
46 #include <sys/kernel.h>
48 #include <sys/mutex.h>
49 #include <sys/malloc.h>
50 #include <sys/file.h> /* Must come after sys/malloc.h */
51 #include <sys/mount.h>
53 #include <sys/protosw.h>
54 #include <sys/socket.h>
55 #include <sys/socketvar.h>
56 #include <sys/vnode.h>
58 #include <fs/portalfs/portal.h>
60 static MALLOC_DEFINE(M_PORTALFSMNT, "portal_mount", "PORTAL mount structure");
62 static vfs_unmount_t portal_unmount;
63 static vfs_root_t portal_root;
64 static vfs_statfs_t portal_statfs;
66 static const char *portal_opts[] = {
72 portal_cmount(struct mntarg *ma, void *data, uint64_t flags)
74 struct portal_args args;
79 error = copyin(data, &args, sizeof args);
83 ma = mount_argf(ma, "socket", "%d", args.pa_socket);
84 ma = mount_argsu(ma, "config", args.pa_config, MAXPATHLEN);
85 error = kernel_mount(ma, flags);
91 * Mount the per-process file descriptors (/dev/fd)
94 portal_mount(struct mount *mp)
97 struct portalmount *fmp;
101 struct portalnode *pn;
106 if (vfs_filteropt(mp->mnt_optnew, portal_opts))
109 error = vfs_scanopt(mp->mnt_optnew, "socket", "%d", &v);
112 error = vfs_getopt(mp->mnt_optnew, "config", (void **)&p, NULL);
117 * Capsicum is not incompatible with portalfs, but we don't really
118 * know what rights are required. In the spirit of "better safe than
119 * sorry", pretend that all rights are required for now.
121 if ((error = fget(td, v, CAP_MASK_VALID, &fp)) != 0)
123 if (fp->f_type != DTYPE_SOCKET) {
127 so = fp->f_data; /* XXX race against userland */
128 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
130 return (ESOCKTNOSUPPORT);
133 pn = malloc(sizeof(struct portalnode),
136 fmp = malloc(sizeof(struct portalmount),
137 M_PORTALFSMNT, M_WAITOK); /* XXX */
139 error = getnewvnode("portal", mp, &portal_vnodeops, &rvp); /* XXX */
141 free(fmp, M_PORTALFSMNT);
147 error = insmntque(rvp, mp); /* XXX: Too early for mpsafe fs */
149 free(fmp, M_PORTALFSMNT);
156 rvp->v_vflag |= VV_ROOT;
157 VTOPORTAL(rvp)->pt_arg = 0;
158 VTOPORTAL(rvp)->pt_size = 0;
159 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
165 mp->mnt_flag |= MNT_LOCAL;
170 vfs_mountedfrom(mp, p);
176 portal_unmount(mp, mntflags)
180 int error, flags = 0;
183 if (mntflags & MNT_FORCE)
187 * Clear out buffer cache. I don't think we
188 * ever get anything cached at this level at the
189 * moment, but who knows...
193 if (mntinvalbuf(mp, 1))
196 /* There is 1 extra root vnode reference (pm_root). */
197 error = vflush(mp, 1, flags, curthread);
202 * Shutdown the socket. This will cause the select in the
203 * daemon to wake up, and then the accept will get ECONNABORTED
204 * which it interprets as a request to go and bury itself.
206 soshutdown(VFSTOPORTAL(mp)->pm_server->f_data, 2);
208 * Discard reference to underlying file. Must call closef because
209 * this may be the last reference.
211 closef(VFSTOPORTAL(mp)->pm_server, (struct thread *) 0);
213 * Finally, throw away the portalmount structure
215 free(mp->mnt_data, M_PORTALFSMNT); /* XXX */
221 portal_root(mp, flags, vpp)
229 * Return locked reference to root.
231 vp = VFSTOPORTAL(mp)->pm_root;
233 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
239 portal_statfs(mp, sbp)
245 sbp->f_bsize = DEV_BSIZE;
246 sbp->f_iosize = DEV_BSIZE;
247 sbp->f_blocks = 2; /* 1K to keep df happy */
250 sbp->f_files = 1; /* Allow for "." */
251 sbp->f_ffree = 0; /* See comments above */
255 static struct vfsops portal_vfsops = {
256 .vfs_cmount = portal_cmount,
257 .vfs_mount = portal_mount,
258 .vfs_root = portal_root,
259 .vfs_statfs = portal_statfs,
260 .vfs_unmount = portal_unmount,
263 VFS_SET(portal_vfsops, portalfs, VFCF_SYNTHETIC);