Remove all traces of Julians DEVFS (incl from kern/subr_diskslice.c)

  Remove old DEVFS support fields from dev_t.

  Make uid, gid & mode members of dev_t and set them in make_dev().

  Use correct uid, gid & mode in make_dev in disk minilayer.

  Add support for registering alias names for a dev_t using the
  new function make_dev_alias().  These will show up as symlinks
  in DEVFS.

  Use makedev() rather than make_dev() for MFSs magic devices to prevent
  DEVFS from noticing this abuse.

  Add a field for DEVFS inode number in dev_t.

  Add new DEVFS in fs/devfs.

  Add devfs cloning to:
        disk minilayer (ie: ad(4), sd(4), cd(4) etc etc)
        md(4), tun(4), bpf(4), fd(4)

  If DEVFS add -d flag to /sbin/inits args to make it mount devfs.

  Add commented out DEVFS to GENERIC

1 files changed, 230 insertions, 0 deletions

diff --git a/sys/fs/devfs/devfs_devs.c b/sys/fs/devfs/devfs_devs.c
new file mode 100644
index 0000000..4bcfc03
--- /dev/null
+++ b/sys/fs/devfs/devfs_devs.c
@@ -0,0 +1,230 @@
+#define DEBUG 1
+/*
+ * Copyright (c) 2000
+ *	Poul-Henning Kamp.  All rights reserved.
+ *
+ * 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. 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.
+ *
+ * From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vfsops.c 1.36
+ *
+ * $FreeBSD$
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/dirent.h>
+#include <sys/conf.h>
+#include <sys/proc.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/malloc.h>
+#include <sys/eventhandler.h>
+#include <sys/ctype.h>
+
+#define DEVFS_INTERN
+#include <fs/devfs/devfs.h>
+
+struct devfs_dirent *
+devfs_newdirent(char *name, int namelen)
+{
+	int i;
+	struct devfs_dirent *de;
+	struct dirent d;
+
+	d.d_namlen = namelen;
+	i = sizeof (*de) + GENERIC_DIRSIZ(&d);
+	MALLOC(de, struct devfs_dirent *, i, M_DEVFS, M_WAITOK);
+	bzero(de, i);
+	de->de_dirent = (struct dirent *)(de + 1);
+	de->de_dirent->d_namlen = namelen;
+	de->de_dirent->d_reclen = GENERIC_DIRSIZ(&d);
+	bcopy(name, de->de_dirent->d_name, namelen + 1);
+	nanotime(&de->de_ctime);
+	return (de);
+}
+
+struct devfs_dir *
+devfs_vmkdir(void)
+{
+	struct devfs_dir *dd;
+	struct devfs_dirent *de;
+
+	MALLOC(dd, struct devfs_dir *, sizeof(*dd), M_DEVFS, M_WAITOK);
+	bzero(dd, sizeof(*dd));
+	TAILQ_INIT(&dd->dd_list);
+
+	de = devfs_newdirent(".", 1);
+	de->de_dirent->d_type = DT_DIR;
+	TAILQ_INSERT_TAIL(&dd->dd_list, de, de_list);
+	de = TAILQ_FIRST(&dd->dd_list);
+	de->de_mode = 0755;
+	return (dd);
+}
+
+void
+devfs_delete(struct devfs_dir *dd, struct devfs_dirent *de)
+{
+
+	if (de->de_symlink) {
+		FREE(de->de_symlink, M_DEVFS);
+		de->de_symlink = NULL;
+	}
+	if (de->de_vnode) {
+		de->de_vnode->v_data = NULL;
+		vdrop(de->de_vnode);
+	}
+	TAILQ_REMOVE(&dd->dd_list, de, de_list);
+	FREE(de, M_DEVFS);
+}
+
+void
+devfs_purge(struct devfs_dir *dd)
+{
+	struct devfs_dirent *de;
+
+	for (;;) {
+		de = TAILQ_FIRST(&dd->dd_list);
+		if (de == NULL)
+			break;
+		devfs_delete(dd, de);
+	}
+	FREE(dd, M_DEVFS);
+}
+
+
+int
+devfs_populate(struct devfs_mount *dm)
+{
+	int i, j;
+	dev_t dev, pdev;
+	struct devfs_dir *dd;
+	struct devfs_dirent *de;
+	char *q, *s;
+
+	while (dm->dm_generation != devfs_generation) {
+		dm->dm_generation = devfs_generation;
+		for (i = 0; i < NDEVINO; i++) {
+			dev = devfs_inot[i];
+			de = dm->dm_dirent[i];
+			if (dev == NULL && de != NULL) {
+#if 0
+				printf("Del ino%d %s\n", i, de->de_dirent->d_name);
+#endif
+				dd = de->de_dir;
+				dm->dm_dirent[i] = NULL;
+				TAILQ_REMOVE(&dd->dd_list, de, de_list);
+				if (de->de_vnode) {
+					de->de_vnode->v_data = NULL;
+					vdrop(de->de_vnode);
+				}
+				FREE(de, M_DEVFS);
+				continue;
+			}
+			if (dev == NULL)
+				continue;
+			if (de != NULL)
+				continue;
+			dd = dm->dm_basedir;
+			s = dev->si_name;
+			for (q = s; *q != '/' && *q != '\0'; q++)
+				continue;
+			if (*q == '/') {
+				continue;
+			}
+			de = devfs_newdirent(s, q - s);
+			if (dev->si_flags & SI_ALIAS) {
+				de->de_inode = dm->dm_inode++;
+				de->de_uid = 0;
+				de->de_gid = 0;
+				de->de_mode = 0642;
+				de->de_dirent->d_type = DT_LNK;
+				pdev = dev->si_drv1;
+				j = strlen(pdev->si_name) + 1;
+				MALLOC(de->de_symlink, char *, j, M_DEVFS, M_WAITOK);
+				bcopy(pdev->si_name, de->de_symlink, j);
+			} else {
+				de->de_inode = i;
+				de->de_uid = dev->si_uid;
+				de->de_gid = dev->si_gid;
+				de->de_mode = dev->si_mode;
+				de->de_dirent->d_type = DT_CHR;
+				dm->dm_dirent[i] = de;
+			}
+			TAILQ_INSERT_TAIL(&dd->dd_list, de, de_list);
+#if 0
+			printf("Add ino%d %s\n", i, dev->si_name);
+#endif
+		}
+	}
+	return (0);
+}
+
+dev_t devfs_inot[NDEVINO];
+int devfs_nino = 3;
+unsigned devfs_generation;
+
+static void
+devfs_create(dev_t dev)
+{
+	if (dev->si_inode == 0 && devfs_nino < NDEVINO)
+		dev->si_inode = devfs_nino++;
+	if (dev->si_inode == 0) {
+		printf("NDEVINO too small\n");
+		return;
+	}
+	devfs_inot[dev->si_inode] = dev;
+	devfs_generation++;
+}
+
+static void
+devfs_remove(dev_t dev)
+{
+	devfs_inot[dev->si_inode] = NULL;
+	devfs_generation++;
+}
+
+devfs_create_t *devfs_create_hook = devfs_create;
+devfs_remove_t *devfs_remove_hook = devfs_remove;
+
+int
+devfs_stdclone(char *name, char **namep, char *stem, int *unit)
+{
+	int u, i;
+
+	if (bcmp(stem, name, strlen(stem)) != 0)
+		return (0);
+	i = strlen(stem);
+	if (!isdigit(name[i]))
+		return (0);
+	u = 0;
+	while (isdigit(name[i])) {
+		u *= 10;
+		u += name[i++] - '0';
+	}
+	*unit = u;
+	if (namep)
+		*namep = &name[i];
+	if (name[i]) 
+		return (2);
+	return (1);
+}