Import of xfs from arla-0.35.7

1 files changed, 269 insertions, 0 deletions

diff --git a/sys/xfs/xfs_vfsops-common.c b/sys/xfs/xfs_vfsops-common.c
new file mode 100644
index 00000000000..8f1210cbc9c
--- /dev/null
+++ b/sys/xfs/xfs_vfsops-common.c
@@ -0,0 +1,269 @@
+/*
+ * Copyright (c) 1995, 1996, 1997, 1998, 1999 Kungliga Tekniska Högskolan
+ * (Royal Institute of Technology, Stockholm, Sweden).
+ * 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.
+ *
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *      This product includes software developed by the Kungliga Tekniska
+ *      Högskolan and its contributors.
+ *
+ * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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 <xfs/xfs_locl.h>
+
+RCSID("$Id: xfs_vfsops-common.c,v 1.1 1999/04/30 01:59:01 art Exp $");
+
+/*
+ * XFS vfs operations.
+ */
+
+#include <xfs/xfs_common.h>
+#include <xfs/xfs_message.h>
+#include <xfs/xfs_fs.h>
+#include <xfs/xfs_dev.h>
+#include <xfs/xfs_deb.h>
+#include <xfs/xfs_syscalls.h>
+#include <xfs/xfs_vfsops.h>
+
+struct xfs xfs[NXFS];
+
+int
+xfs_mount_common(struct mount *mp,
+		 const char *user_path,
+		 caddr_t user_data,
+		 struct nameidata *ndp,
+		 struct proc *p)
+{
+    struct vnode *devvp;
+    dev_t dev;
+    int error;
+    struct vattr vat;
+    char path[MAXPATHLEN];
+    char data[MAXPATHLEN];
+    size_t len;
+
+    error = copyinstr(user_path, path, MAXPATHLEN, &len);
+    if (error)
+	return error;
+
+    error = copyinstr(user_data, data, MAXPATHLEN, &len);
+    if (error)
+	return error;
+
+    XFSDEB(XDEBVFOPS, ("xfs_mount: "
+		       "struct mount mp = %p path = '%s' data = '%s'\n",
+		       mp, path, data));
+
+#ifdef ARLA_KNFS
+    XFSDEB(XDEBVFOPS, ("xfs_mount: mount flags = %x\n", mp->mnt_flag));
+
+    /*
+     * mountd(8) flushes all export entries when it starts
+     * right now we ignore it (but should not)
+     */
+
+    if (mp->mnt_flag & MNT_UPDATE ||
+	mp->mnt_flag & MNT_DELEXPORT) {
+
+	XFSDEB(XDEBVFOPS, 
+	       ("xfs_mount: ignoreing MNT_UPDATE or MNT_DELEXPORT\n"));
+	return 0;
+    }
+#endif
+
+    NDINIT(ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, data, p);
+    error = namei(ndp);
+    if (error) {
+	XFSDEB(XDEBVFOPS, ("namei failed, errno = %d\n", error));
+	return error;
+    }
+
+    devvp = ndp->ni_vp;
+
+    if (devvp->v_type != VCHR) {
+	vput(devvp);
+	XFSDEB(XDEBVFOPS, ("not VCHR (%d)\n", devvp->v_type));
+	return ENXIO;
+    }
+#ifdef __osf__
+    VOP_GETATTR(devvp, &vat, ndp->ni_cred, error);
+#else
+    error = VOP_GETATTR(devvp, &vat, p->p_ucred, p);
+#endif
+    vput(devvp);
+    if (error) {
+	XFSDEB(XDEBVFOPS, ("VOP_GETATTR failed, error = %d\n", error));
+	return error;
+    }
+    dev = vat.va_rdev;
+    XFSDEB(XDEBVFOPS, ("dev = %d.%d\n", major(dev), minor(dev)));
+
+    /* Check that this device really is an xfs_dev */
+    if (major(dev) < 0 || major(dev) > nchrdev) {
+	XFSDEB(XDEBVFOPS, ("major out of range (0 < %d < %d)\n", 
+			   major(dev), nchrdev));
+	return ENXIO;
+    }
+    if (minor(dev) < 0 || NXFS < minor(dev)) {
+	XFSDEB(XDEBVFOPS, ("minor out of range (0 < %d < %d)\n", 
+			   minor(dev), NXFS));
+	return ENXIO;
+    }
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+    if(!xfs_func_is_devopen(cdevsw[major(dev)].d_open))
+	return ENXIO;
+#elif defined(__FreeBSD__)
+    if (cdevsw[major(dev)] == NULL
+	|| !xfs_func_is_devopen(cdevsw[major(dev)]->d_open))
+	return ENXIO;
+#endif
+
+    if (xfs[minor(dev)].status & XFS_MOUNTED)
+	return EBUSY;
+
+    xfs[minor(dev)].status = XFS_MOUNTED;
+    xfs[minor(dev)].mp = mp;
+    xfs[minor(dev)].root = 0;
+    xfs[minor(dev)].nnodes = 0;
+    xfs[minor(dev)].fd = minor(dev);
+
+    VFS_TO_XFS(mp) = &xfs[minor(dev)];
+#if defined(HAVE_KERNEL_VFS_GETNEWFSID)
+#if defined(HAVE_TWO_ARGUMENT_VFS_GETNEWFSID)
+    vfs_getnewfsid(mp, MOUNT_AFS);
+#else
+    vfs_getnewfsid(mp);
+#endif
+#elif defined(__NetBSD__) || defined(__OpenBSD__)
+    getnewfsid(mp, makefstype(MOUNT_AFS));
+#elif defined(__FreeBSD__)
+    getnewfsid(mp, MOUNT_AFS);
+    mp->mnt_stat.f_type = MOUNT_AFS;
+#endif
+
+    mp->mnt_stat.f_bsize = DEV_BSIZE;
+#ifndef __osf__
+    mp->mnt_stat.f_iosize = DEV_BSIZE;
+    mp->mnt_stat.f_owner = 0;
+#endif
+    mp->mnt_stat.f_blocks = 4711 * 4711;
+    mp->mnt_stat.f_bfree = 4711 * 4711;
+    mp->mnt_stat.f_bavail = 4711 * 4711;
+    mp->mnt_stat.f_files = 4711;
+    mp->mnt_stat.f_ffree = 4711;
+    mp->mnt_stat.f_flags = mp->mnt_flag;
+
+#ifdef __osf__
+    mp->mnt_stat.f_fsid.val[0] = dev;
+    mp->mnt_stat.f_fsid.val[1] = MOUNT_XFS;
+	
+    MALLOC(mp->m_stat.f_mntonname, char *, strlen(path) + 1, 
+	   M_PATHNAME, M_WAITOK);
+    strcpy(mp->m_stat.f_mntonname, path);
+
+    MALLOC(mp->m_stat.f_mntfromname, char *, sizeof("arla"),
+	   M_PATHNAME, M_WAITOK);
+    strcpy(mp->m_stat.f_mntfromname, "arla");
+#else /* __osf__ */
+    strncpy(mp->mnt_stat.f_mntonname,
+	    path,
+	    sizeof(mp->mnt_stat.f_mntonname));
+
+    strncpy(mp->mnt_stat.f_mntfromname,
+	    "arla",
+	    sizeof(mp->mnt_stat.f_mntfromname));
+
+#if defined(__NetBSD__) || defined(__OpenBSD__)
+    strncpy(mp->mnt_stat.f_fstypename,
+	    "xfs",
+	    sizeof(mp->mnt_stat.f_fstypename));
+#endif
+#endif /* __osf__ */
+
+    return 0;
+}
+
+int
+xfs_unmount_common(struct mount *mp, int mntflags)
+{
+    struct xfs *xfsp = VFS_TO_XFS(mp);
+    int flags = 0;
+    int error;
+
+    if (mntflags & MNT_FORCE) {
+#ifdef HAVE_KERNEL_DOFORCE
+	extern int doforce;
+	if (!doforce)
+	    return EINVAL;
+#endif
+	flags |= FORCECLOSE;
+    }
+
+    error = free_all_xfs_nodes(xfsp, flags, 1);
+    if (error)
+	return error;
+
+    xfsp->status = 0;
+    XFS_TO_VFS(xfsp) = NULL;
+    return 0;
+}
+
+int
+xfs_root_common(struct mount *mp, struct vnode **vpp,
+		struct proc *proc, struct ucred *cred)
+{
+    struct xfs *xfsp = VFS_TO_XFS(mp);
+    struct xfs_message_getroot msg;
+    int error;
+
+    do {
+	if (xfsp->root != NULL) {
+	    *vpp = XNODE_TO_VNODE(xfsp->root);
+	    xfs_do_vget(*vpp, LK_INTERLOCK|LK_EXCLUSIVE, proc);
+	    return 0;
+	}
+	msg.header.opcode = XFS_MSG_GETROOT;
+	msg.cred.uid = cred->cr_uid;
+	msg.cred.pag = xfs_get_pag(cred);
+	error = xfs_message_rpc(xfsp->fd, &msg.header, sizeof(msg));
+	if (error == 0)
+	    error = ((struct xfs_message_wakeup *) & msg)->error;
+    } while (error == 0);
+    /*
+     * Failed to get message through, need to pretend that all went well
+     * and return a fake dead vnode to be able to unmount.
+     */
+
+    if ((error = make_dead_vnode(mp, vpp)))
+	return error;
+
+    (*vpp)->v_flag |= VROOT;
+    return 0;
+}