Please welcome ZFS - The last word in file systems.

ZFS file system was ported from OpenSolaris operating system. The code in under
CDDL license.

I'd like to thank all SUN developers that created this great piece of software.

Supported by:	Wheel LTD (http://www.wheel.pl/)
Supported by:	The FreeBSD Foundation (http://www.freebsdfoundation.org/)
Supported by:	Sentex (http://www.sentex.net/)

1 files changed, 270 insertions, 0 deletions

diff --git a/sys/compat/opensolaris/kern/opensolaris_vfs.c b/sys/compat/opensolaris/kern/opensolaris_vfs.c
new file mode 100644
index 0000000..074a24b
--- /dev/null
+++ b/sys/compat/opensolaris/kern/opensolaris_vfs.c
@@ -0,0 +1,270 @@
+/*-
+ * Copyright (c) 2006-2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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. 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/mount.h>
+#include <sys/cred.h>
+#include <sys/vfs.h>
+#include <sys/priv.h>
+#include <sys/libkern.h>
+
+MALLOC_DECLARE(M_MOUNT);
+
+TAILQ_HEAD(vfsoptlist, vfsopt);
+struct vfsopt {
+	TAILQ_ENTRY(vfsopt) link;
+	char	*name;
+	void	*value;
+	int	len;
+};
+
+void
+vfs_setmntopt(vfs_t *vfsp, const char *name, const char *arg,
+    int flags __unused)
+{
+	struct vfsopt *opt;
+	size_t namesize;
+
+	if (vfsp->mnt_opt == NULL) {
+		vfsp->mnt_opt = malloc(sizeof(*vfsp->mnt_opt), M_MOUNT, M_WAITOK);
+		TAILQ_INIT(vfsp->mnt_opt);
+	}
+
+	opt = malloc(sizeof(*opt), M_MOUNT, M_WAITOK);
+
+	namesize = strlen(name) + 1;
+	opt->name = malloc(namesize, M_MOUNT, M_WAITOK);
+	strlcpy(opt->name, name, namesize);
+
+	if (arg == NULL) {
+		opt->value = NULL;
+		opt->len = 0;
+	} else {
+		opt->len = strlen(arg) + 1;
+		opt->value = malloc(opt->len, M_MOUNT, M_WAITOK);
+		bcopy(arg, opt->value, opt->len);
+	}
+	/* TODO: Locking. */
+	TAILQ_INSERT_TAIL(vfsp->mnt_opt, opt, link);
+}
+
+void
+vfs_clearmntopt(vfs_t *vfsp, const char *name)
+{
+	struct vfsopt *opt;
+
+	if (vfsp->mnt_opt == NULL)
+		return;
+	/* TODO: Locking. */
+	TAILQ_FOREACH(opt, vfsp->mnt_opt, link) {
+		if (strcmp(opt->name, name) == 0)
+			break;
+	}
+	if (opt != NULL) {
+		TAILQ_REMOVE(vfsp->mnt_opt, opt, link);
+		free(opt->name, M_MOUNT);
+		if (opt->value != NULL)
+			free(opt->value, M_MOUNT);
+		free(opt, M_MOUNT);
+	}
+}
+
+int
+vfs_optionisset(const vfs_t *vfsp, const char *opt, char **argp)
+{
+	struct vfsoptlist *opts = vfsp->mnt_opt;
+	int error;
+
+	if (opts == NULL)
+		return (0);
+	error = vfs_getopt(opts, opt, (void **)argp, NULL);
+	return (error != 0 ? 0 : 1);
+}
+
+int
+traverse(vnode_t **cvpp)
+{
+	kthread_t *td = curthread;
+	vnode_t *cvp;
+	vnode_t *tvp;
+	vfs_t *vfsp;
+	int error;
+
+	cvp = *cvpp;
+	error = 0;
+
+	/*
+	 * If this vnode is mounted on, then we transparently indirect
+	 * to the vnode which is the root of the mounted file system.
+	 * Before we do this we must check that an unmount is not in
+	 * progress on this vnode.
+	 */
+
+	for (;;) {
+		/*
+		 * Reached the end of the mount chain?
+		 */
+		vfsp = vn_mountedvfs(cvp);
+		if (vfsp == NULL)
+			break;
+		VN_RELE(cvp);
+
+		/*
+		 * The read lock must be held across the call to VFS_ROOT() to
+		 * prevent a concurrent unmount from destroying the vfs.
+		 */
+		error = VFS_ROOT(vfsp, 0, &tvp, td);
+		if (error)
+			break;
+		VOP_UNLOCK(tvp, 0, td);
+
+		cvp = tvp;
+	}
+
+	*cvpp = cvp;
+	return (error);
+}
+
+extern struct mount *vfs_mount_alloc(struct vnode *vp, struct vfsconf *vfsp,
+    const char *fspath, struct thread *td);
+
+int
+domount(kthread_t *td, vnode_t *vp, const char *fstype, char *fspath,
+    char *fspec, int fsflags)
+{
+	struct mount *mp;
+	struct vfsconf *vfsp;
+	int error;
+
+	/*
+	 * Be ultra-paranoid about making sure the type and fspath
+	 * variables will fit in our mp buffers, including the
+	 * terminating NUL.
+	 */
+	if (strlen(fstype) >= MFSNAMELEN || strlen(fspath) >= MNAMELEN)
+		return (ENAMETOOLONG);
+
+	if ((error = priv_check(td, PRIV_VFS_MOUNT)) != 0)
+		return (error);
+
+	vfsp = vfs_byname_kld(fstype, td, &error);
+	if (vfsp == NULL)
+		return (ENODEV);
+
+	if (vp->v_type != VDIR)
+		return (ENOTDIR);
+	VI_LOCK(vp);
+	if ((vp->v_iflag & VI_MOUNT) != 0 ||
+	    vp->v_mountedhere != NULL) {
+		VI_UNLOCK(vp);
+		return (EBUSY);
+	}
+	vp->v_iflag |= VI_MOUNT;
+	VI_UNLOCK(vp);
+
+	/*
+	 * Allocate and initialize the filesystem.
+	 */
+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
+	mp = vfs_mount_alloc(vp, vfsp, fspath, td);
+	VOP_UNLOCK(vp, 0, td);
+
+	mp->mnt_optnew = NULL;
+	vfs_setmntopt(mp, "from", fspec, 0);
+	mp->mnt_optnew = mp->mnt_opt;
+	mp->mnt_opt = NULL;
+
+	/*
+	 * Set the mount level flags.
+	 */
+	if (fsflags & MNT_RDONLY)
+		mp->mnt_flag |= MNT_RDONLY;
+	mp->mnt_flag &=~ MNT_UPDATEMASK;
+	mp->mnt_flag |= fsflags & (MNT_UPDATEMASK | MNT_FORCE | MNT_ROOTFS);
+	/*
+	 * Mount the filesystem.
+	 * XXX The final recipients of VFS_MOUNT just overwrite the ndp they
+	 * get.  No freeing of cn_pnbuf.
+	 */
+	error = VFS_MOUNT(mp, td);
+
+	if (!error) {
+		if (mp->mnt_opt != NULL)
+			vfs_freeopts(mp->mnt_opt);
+		mp->mnt_opt = mp->mnt_optnew;
+		(void)VFS_STATFS(mp, &mp->mnt_stat, td);
+	}
+	/*
+	 * Prevent external consumers of mount options from reading
+	 * mnt_optnew.
+	*/
+	mp->mnt_optnew = NULL;
+	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
+	/*
+	 * Put the new filesystem on the mount list after root.
+	 */
+//	cache_purge(vp);
+	if (!error) {
+		vnode_t *mvp;
+
+		VI_LOCK(vp);
+		vp->v_iflag &= ~VI_MOUNT;
+		VI_UNLOCK(vp);
+		vp->v_mountedhere = mp;
+		mtx_lock(&mountlist_mtx);
+		TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
+		mtx_unlock(&mountlist_mtx);
+		vfs_event_signal(NULL, VQ_MOUNT, 0);
+		if (VFS_ROOT(mp, LK_EXCLUSIVE, &mvp, td))
+			panic("mount: lost mount");
+		mountcheckdirs(vp, mvp);
+		vput(mvp);
+		VOP_UNLOCK(vp, 0, td);
+		if ((mp->mnt_flag & MNT_RDONLY) == 0)
+			error = vfs_allocate_syncvnode(mp);
+		vfs_unbusy(mp, td);
+		if (error)
+			vrele(vp);
+		else
+			vfs_mountedfrom(mp, fspec);
+	} else {
+		VI_LOCK(vp);
+		vp->v_iflag &= ~VI_MOUNT;
+		VI_UNLOCK(vp);
+		vfs_unbusy(mp, td);
+		vfs_mount_destroy(mp);
+		if (VOP_ISLOCKED(vp, td) != LK_EXCLUSIVE) {
+			printf("%s:%u: vnode vp=%p not locked\n", __func__, __LINE__, vp);
+			vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
+		}
+	}
+	return (error);
+}