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32 * @(#)portal_vfsops.c 8.11 (Berkeley) 5/14/95
34 * $FreeBSD: src/sys/miscfs/portal/portal_vfsops.c,v 1.26.2.2 2001/07/26 20:37:16 iedowse Exp $
41 #include <sys/param.h>
42 #include <sys/systm.h>
43 #include <sys/kernel.h>
45 #include <sys/filedesc.h>
47 #include <sys/vnode.h>
48 #include <sys/mount.h>
49 #include <sys/malloc.h>
50 #include <sys/socket.h>
51 #include <sys/socketvar.h>
52 #include <sys/protosw.h>
53 #include <sys/domain.h>
56 extern struct vop_ops portal_vnode_vops;
58 static MALLOC_DEFINE(M_PORTALFSMNT, "PORTAL mount", "PORTAL mount structure");
60 static int portal_mount (struct mount *mp, char *path, caddr_t data,
62 static int portal_unmount (struct mount *mp, int mntflags);
63 static int portal_root (struct mount *mp, struct vnode **vpp);
64 static int portal_statfs (struct mount *mp, struct statfs *sbp,
68 * Mount the per-process file descriptors (/dev/fd)
71 portal_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred)
74 struct portal_args args;
75 struct portalmount *fmp;
78 struct portalnode *pn;
85 if (mp->mnt_flag & MNT_UPDATE)
88 error = copyin(data, (caddr_t) &args, sizeof(struct portal_args));
92 KKASSERT(curproc != NULL);
93 error = holdsock(curproc->p_fd, args.pa_socket, &fp);
96 so = (struct socket *) fp->f_data;
97 if (so->so_proto->pr_domain->dom_family != AF_UNIX) {
99 return (ESOCKTNOSUPPORT);
102 pn = kmalloc(sizeof(struct portalnode), M_TEMP, M_WAITOK);
104 fmp = kmalloc(sizeof(struct portalmount), M_PORTALFSMNT, M_WAITOK); /* XXX */
107 vfs_add_vnodeops(mp, &portal_vnode_vops, &mp->mnt_vn_norm_ops);
109 error = getnewvnode(VT_PORTAL, mp, &rvp, 0, 0);
111 kfree(fmp, M_PORTALFSMNT);
119 vsetflags(rvp, VROOT);
120 VTOPORTAL(rvp)->pt_arg = 0;
121 VTOPORTAL(rvp)->pt_size = 0;
122 VTOPORTAL(rvp)->pt_fileid = PORTAL_ROOTFILEID;
124 fmp->pm_server = fp; fp->f_count++;
126 mp->mnt_flag |= MNT_LOCAL;
127 mp->mnt_data = (qaddr_t) fmp;
130 (void)copyinstr(args.pa_config,
131 mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &size);
132 bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
135 bzero(mp->mnt_stat.f_mntfromname, MNAMELEN);
136 bcopy("portal", mp->mnt_stat.f_mntfromname, sizeof("portal"));
140 (void)portal_statfs(mp, &mp->mnt_stat, cred);
146 portal_unmount(struct mount *mp, int mntflags)
148 int error, flags = 0;
151 if (mntflags & MNT_FORCE)
155 * Clear out buffer cache. I don't think we
156 * ever get anything cached at this level at the
157 * moment, but who knows...
161 if (mntinvalbuf(mp, 1))
164 /* There is 1 extra root vnode reference (pm_root). */
165 error = vflush(mp, 1, flags);
170 * Shutdown the socket. This will cause the select in the
171 * daemon to wake up, and then the accept will get ECONNABORTED
172 * which it interprets as a request to go and bury itself.
174 soshutdown((struct socket *) VFSTOPORTAL(mp)->pm_server->f_data,
177 * Discard reference to underlying file. Must call closef because
178 * this may be the last reference.
180 closef(VFSTOPORTAL(mp)->pm_server, NULL);
182 * Finally, throw away the portalmount structure
184 kfree(mp->mnt_data, M_PORTALFSMNT); /* XXX */
190 portal_root(struct mount *mp, struct vnode **vpp)
196 * Return locked reference to root.
198 vp = VFSTOPORTAL(mp)->pm_root;
199 error = vget(vp, LK_EXCLUSIVE | LK_RETRY);
206 portal_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred)
209 sbp->f_bsize = DEV_BSIZE;
210 sbp->f_iosize = DEV_BSIZE;
211 sbp->f_blocks = 2; /* 1K to keep df happy */
214 sbp->f_files = 1; /* Allow for "." */
215 sbp->f_ffree = 0; /* See comments above */
216 if (sbp != &mp->mnt_stat) {
217 sbp->f_type = mp->mnt_vfc->vfc_typenum;
218 bcopy(&mp->mnt_stat.f_fsid, &sbp->f_fsid, sizeof(sbp->f_fsid));
219 bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
224 static struct vfsops portal_vfsops = {
225 .vfs_mount = portal_mount,
226 .vfs_unmount = portal_unmount,
227 .vfs_root = portal_root,
228 .vfs_statfs = portal_statfs,
229 .vfs_sync = vfs_stdsync
232 VFS_SET(portal_vfsops, portal, VFCF_SYNTHETIC);
233 MODULE_VERSION(portal, 1);