/* $NetBSD: procfs_vfsops.c,v 1.63 2005/12/11 12:24:51 christos Exp $ */ /* * Copyright (c) 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95 */ /* * Copyright (c) 1993 Jan-Simon Pendry * * This code is derived from software contributed to Berkeley by * Jan-Simon Pendry. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)procfs_vfsops.c 8.7 (Berkeley) 5/10/95 */ /* * procfs VFS interface */ #include __KERNEL_RCSID(0, "$NetBSD: procfs_vfsops.c,v 1.63 2005/12/11 12:24:51 christos Exp $"); #if defined(_KERNEL_OPT) #include "opt_compat_netbsd.h" #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* for PAGE_SIZE */ void procfs_init(void); void procfs_reinit(void); void procfs_done(void); int procfs_mount(struct mount *, const char *, void *, struct nameidata *, struct lwp *); int procfs_start(struct mount *, int, struct lwp *); int procfs_unmount(struct mount *, int, struct lwp *); int procfs_quotactl(struct mount *, int, uid_t, void *, struct lwp *); int procfs_statvfs(struct mount *, struct statvfs *, struct lwp *); int procfs_sync(struct mount *, int, struct ucred *, struct lwp *); int procfs_vget(struct mount *, ino_t, struct vnode **); /* * VFS Operations. * * mount system call */ /* ARGSUSED */ int procfs_mount(mp, path, data, ndp, l) struct mount *mp; const char *path; void *data; struct nameidata *ndp; struct lwp *l; { struct procfsmount *pmnt; struct procfs_args args; int error; if (UIO_MX & (UIO_MX-1)) { log(LOG_ERR, "procfs: invalid directory entry size"); return (EINVAL); } if (mp->mnt_flag & MNT_GETARGS) { pmnt = VFSTOPROC(mp); if (pmnt == NULL) return EIO; args.version = PROCFS_ARGSVERSION; args.flags = pmnt->pmnt_flags; return copyout(&args, data, sizeof(args)); } if (mp->mnt_flag & MNT_UPDATE) return (EOPNOTSUPP); if (data != NULL) { error = copyin(data, &args, sizeof args); if (error != 0) return error; if (args.version != PROCFS_ARGSVERSION) return EINVAL; } else args.flags = 0; pmnt = (struct procfsmount *) malloc(sizeof(struct procfsmount), M_UFSMNT, M_WAITOK); /* XXX need new malloc type */ mp->mnt_stat.f_namemax = MAXNAMLEN; mp->mnt_flag |= MNT_LOCAL; mp->mnt_data = pmnt; vfs_getnewfsid(mp); error = set_statvfs_info(path, UIO_USERSPACE, "procfs", UIO_SYSSPACE, mp, l); pmnt->pmnt_exechook = exechook_establish(procfs_revoke_vnodes, mp); pmnt->pmnt_flags = args.flags; return error; } /* * unmount system call */ int procfs_unmount(mp, mntflags, l) struct mount *mp; int mntflags; struct lwp *l; { int error; int flags = 0; if (mntflags & MNT_FORCE) flags |= FORCECLOSE; if ((error = vflush(mp, 0, flags)) != 0) return (error); exechook_disestablish(VFSTOPROC(mp)->pmnt_exechook); free(mp->mnt_data, M_UFSMNT); mp->mnt_data = 0; return (0); } int procfs_root(mp, vpp) struct mount *mp; struct vnode **vpp; { return (procfs_allocvp(mp, vpp, 0, PFSroot, -1)); } /* ARGSUSED */ int procfs_start(mp, flags, l) struct mount *mp; int flags; struct lwp *l; { return (0); } /* * Get file system statistics. */ int procfs_statvfs(mp, sbp, l) struct mount *mp; struct statvfs *sbp; struct lwp *l; { sbp->f_bsize = PAGE_SIZE; sbp->f_frsize = PAGE_SIZE; sbp->f_iosize = PAGE_SIZE; sbp->f_blocks = 1; /* avoid divide by zero in some df's */ sbp->f_bfree = 0; sbp->f_bavail = 0; sbp->f_bresvd = 0; sbp->f_files = maxproc; /* approx */ sbp->f_ffree = maxproc - nprocs; /* approx */ sbp->f_favail = maxproc - nprocs; /* approx */ sbp->f_fresvd = 0; copy_statvfs_info(sbp, mp); return (0); } /*ARGSUSED*/ int procfs_quotactl(mp, cmds, uid, arg, l) struct mount *mp; int cmds; uid_t uid; void *arg; struct lwp *l; { return (EOPNOTSUPP); } /*ARGSUSED*/ int procfs_sync(mp, waitfor, uc, l) struct mount *mp; int waitfor; struct ucred *uc; struct lwp *l; { return (0); } /*ARGSUSED*/ int procfs_vget(mp, ino, vpp) struct mount *mp; ino_t ino; struct vnode **vpp; { return (EOPNOTSUPP); } void procfs_init() { procfs_hashinit(); } void procfs_reinit() { procfs_hashreinit(); } void procfs_done() { procfs_hashdone(); } SYSCTL_SETUP(sysctl_vfs_procfs_setup, "sysctl vfs.procfs subtree setup") { sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "vfs", NULL, NULL, 0, NULL, 0, CTL_VFS, CTL_EOL); sysctl_createv(clog, 0, NULL, NULL, CTLFLAG_PERMANENT, CTLTYPE_NODE, "procfs", SYSCTL_DESCR("Process file system"), NULL, 0, NULL, 0, CTL_VFS, 12, CTL_EOL); /* * XXX the "12" above could be dynamic, thereby eliminating * one more instance of the "number to vfs" mapping problem, * but "12" is the order as taken from sys/mount.h */ } extern const struct vnodeopv_desc procfs_vnodeop_opv_desc; const struct vnodeopv_desc * const procfs_vnodeopv_descs[] = { &procfs_vnodeop_opv_desc, NULL, }; struct vfsops procfs_vfsops = { MOUNT_PROCFS, procfs_mount, procfs_start, procfs_unmount, procfs_root, procfs_quotactl, procfs_statvfs, procfs_sync, procfs_vget, NULL, /* vfs_fhtovp */ NULL, /* vfs_vptofh */ procfs_init, procfs_reinit, procfs_done, NULL, /* vfs_mountroot */ (int (*)(struct mount *, struct vnode *, struct timespec *)) eopnotsupp, vfs_stdextattrctl, procfs_vnodeopv_descs, }; VFS_ATTACH(procfs_vfsops);