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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 1.24 2007/05/18 17:05:13 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 vop_ops portal_vnode_vops
;
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
);
68 static int portal_root (struct mount
*mp
, struct vnode
**vpp
);
69 static int portal_statfs (struct mount
*mp
, struct statfs
*sbp
,
73 * Mount the per-process file descriptors (/dev/fd)
76 portal_mount(struct mount
*mp
, char *path
, caddr_t data
, struct ucred
*cred
)
79 struct portal_args args
;
80 struct portalmount
*fmp
;
83 struct portalnode
*pn
;
90 if (mp
->mnt_flag
& MNT_UPDATE
)
93 error
= copyin(data
, (caddr_t
) &args
, sizeof(struct portal_args
));
97 KKASSERT(curproc
!= NULL
);
98 error
= holdsock(curproc
->p_fd
, args
.pa_socket
, &fp
);
101 so
= (struct socket
*) fp
->f_data
;
102 if (so
->so_proto
->pr_domain
->dom_family
!= AF_UNIX
) {
104 return (ESOCKTNOSUPPORT
);
107 MALLOC(pn
, struct portalnode
*, sizeof(struct portalnode
),
110 MALLOC(fmp
, struct portalmount
*, sizeof(struct portalmount
),
111 M_PORTALFSMNT
, M_WAITOK
); /* XXX */
114 vfs_add_vnodeops(mp
, &portal_vnode_vops
, &mp
->mnt_vn_norm_ops
);
116 error
= getnewvnode(VT_PORTAL
, mp
, &rvp
, 0, 0);
118 FREE(fmp
, M_PORTALFSMNT
);
126 rvp
->v_flag
|= VROOT
;
127 VTOPORTAL(rvp
)->pt_arg
= 0;
128 VTOPORTAL(rvp
)->pt_size
= 0;
129 VTOPORTAL(rvp
)->pt_fileid
= PORTAL_ROOTFILEID
;
131 fmp
->pm_server
= fp
; fp
->f_count
++;
133 mp
->mnt_flag
|= MNT_LOCAL
;
134 mp
->mnt_data
= (qaddr_t
) fmp
;
137 (void)copyinstr(args
.pa_config
,
138 mp
->mnt_stat
.f_mntfromname
, MNAMELEN
- 1, &size
);
139 bzero(mp
->mnt_stat
.f_mntfromname
+ size
, MNAMELEN
- size
);
142 bzero(mp
->mnt_stat
.f_mntfromname
, MNAMELEN
);
143 bcopy("portal", mp
->mnt_stat
.f_mntfromname
, sizeof("portal"));
147 (void)portal_statfs(mp
, &mp
->mnt_stat
, cred
);
153 portal_unmount(struct mount
*mp
, int mntflags
)
155 int error
, flags
= 0;
158 if (mntflags
& MNT_FORCE
)
162 * Clear out buffer cache. I don't think we
163 * ever get anything cached at this level at the
164 * moment, but who knows...
168 if (mntinvalbuf(mp
, 1))
171 /* There is 1 extra root vnode reference (pm_root). */
172 error
= vflush(mp
, 1, flags
);
177 * Shutdown the socket. This will cause the select in the
178 * daemon to wake up, and then the accept will get ECONNABORTED
179 * which it interprets as a request to go and bury itself.
181 soshutdown((struct socket
*) VFSTOPORTAL(mp
)->pm_server
->f_data
,
184 * Discard reference to underlying file. Must call closef because
185 * this may be the last reference.
187 closef(VFSTOPORTAL(mp
)->pm_server
, (struct thread
*) 0);
189 * Finally, throw away the portalmount structure
191 kfree(mp
->mnt_data
, M_PORTALFSMNT
); /* XXX */
197 portal_root(struct mount
*mp
, struct vnode
**vpp
)
203 * Return locked reference to root.
205 vp
= VFSTOPORTAL(mp
)->pm_root
;
206 error
= vget(vp
, LK_EXCLUSIVE
| LK_RETRY
);
213 portal_statfs(struct mount
*mp
, struct statfs
*sbp
, struct ucred
*cred
)
216 sbp
->f_bsize
= DEV_BSIZE
;
217 sbp
->f_iosize
= DEV_BSIZE
;
218 sbp
->f_blocks
= 2; /* 1K to keep df happy */
221 sbp
->f_files
= 1; /* Allow for "." */
222 sbp
->f_ffree
= 0; /* See comments above */
223 if (sbp
!= &mp
->mnt_stat
) {
224 sbp
->f_type
= mp
->mnt_vfc
->vfc_typenum
;
225 bcopy(&mp
->mnt_stat
.f_fsid
, &sbp
->f_fsid
, sizeof(sbp
->f_fsid
));
226 bcopy(mp
->mnt_stat
.f_mntfromname
, sbp
->f_mntfromname
, MNAMELEN
);
231 static struct vfsops portal_vfsops
= {
232 .vfs_mount
= portal_mount
,
233 .vfs_unmount
= portal_unmount
,
234 .vfs_root
= portal_root
,
235 .vfs_statfs
= portal_statfs
,
236 .vfs_sync
= vfs_stdsync
239 VFS_SET(portal_vfsops
, portal
, VFCF_SYNTHETIC
);