Import kernel part of SMB/CIFS requester.

Add smbfs(CIFS) filesystem.

Userland part will be in the ports tree for a while.

Obtained from:	smbfs-1.3.7-dev package.

1 files changed, 513 insertions, 0 deletions

diff --git a/sys/fs/smbfs/smbfs_vfsops.c b/sys/fs/smbfs/smbfs_vfsops.c
new file mode 100644
index 0000000..c0f9ee1
--- /dev/null
+++ b/sys/fs/smbfs/smbfs_vfsops.c
@@ -0,0 +1,513 @@
+/*
+ * Copyright (c) 2000-2001, Boris Popov
+ * 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 Boris Popov.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+#include "opt_netsmb.h"
+#ifndef NETSMB
+#error "SMBFS requires option NETSMB"
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/bio.h>
+#include <sys/buf.h>
+#include <sys/kernel.h>
+#include <sys/sysctl.h>
+#include <sys/vnode.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+#include <sys/malloc.h>
+
+
+#include <netsmb/smb.h>
+#include <netsmb/smb_conn.h>
+#include <netsmb/smb_subr.h>
+#include <netsmb/smb_dev.h>
+
+#include <fs/smbfs/smbfs.h>
+#include <fs/smbfs/smbfs_node.h>
+#include <fs/smbfs/smbfs_subr.h>
+
+int smbfs_debuglevel = 0;
+
+static int smbfs_version = SMBFS_VERSION;
+
+#ifdef SMBFS_USEZONE
+#include <vm/vm.h>
+#include <vm/vm_extern.h>
+#include <vm/vm_zone.h>
+
+vm_zone_t smbfsmount_zone;
+#endif
+
+SYSCTL_NODE(_vfs, OID_AUTO, smbfs, CTLFLAG_RW, 0, "SMB/CIFS file system");
+SYSCTL_INT(_vfs_smbfs, OID_AUTO, version, CTLFLAG_RD, &smbfs_version, 0, "");
+SYSCTL_INT(_vfs_smbfs, OID_AUTO, debuglevel, CTLFLAG_RW, &smbfs_debuglevel, 0, "");
+
+static MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
+
+
+static int smbfs_mount(struct mount *, char *, caddr_t,
+			struct nameidata *, struct proc *);
+static int smbfs_quotactl(struct mount *, int, uid_t, caddr_t, struct proc *);
+static int smbfs_root(struct mount *, struct vnode **);
+static int smbfs_start(struct mount *, int, struct proc *);
+static int smbfs_statfs(struct mount *, struct statfs *, struct proc *);
+static int smbfs_sync(struct mount *, int, struct ucred *, struct proc *);
+static int smbfs_unmount(struct mount *, int, struct proc *);
+static int smbfs_init(struct vfsconf *vfsp);
+static int smbfs_uninit(struct vfsconf *vfsp);
+
+#if __FreeBSD_version < 400009
+static int smbfs_vget(struct mount *mp, ino_t ino, struct vnode **vpp);
+static int smbfs_fhtovp(struct mount *, struct fid *,
+			struct sockaddr *, struct vnode **, int *,
+			struct ucred **);
+static int smbfs_vptofh(struct vnode *, struct fid *);
+#endif
+
+static struct vfsops smbfs_vfsops = {
+	smbfs_mount,
+	smbfs_start,
+	smbfs_unmount,
+	smbfs_root,
+	smbfs_quotactl,
+	smbfs_statfs,
+	smbfs_sync,
+#if __FreeBSD_version > 400008
+	vfs_stdvget,
+	vfs_stdfhtovp,		/* shouldn't happen */
+	vfs_stdcheckexp,
+	vfs_stdvptofh,		/* shouldn't happen */
+#else
+	smbfs_vget,
+	smbfs_fhtovp,
+	smbfs_vptofh,
+#endif
+	smbfs_init,
+	smbfs_uninit,
+#ifndef FB_RELENG3
+	vfs_stdextattrctl,
+#else
+#define	M_USE_RESERVE	M_KERNEL
+	&sysctl___vfs_smbfs
+#endif
+};
+
+
+VFS_SET(smbfs_vfsops, smbfs, VFCF_NETWORK);
+
+MODULE_DEPEND(smbfs, netsmb, NSMB_VERSION, NSMB_VERSION, NSMB_VERSION);
+MODULE_DEPEND(smbfs, libiconv, 1, 1, 1);
+
+int smbfs_pbuf_freecnt = -1;	/* start out unlimited */
+
+static int
+smbfs_mount(struct mount *mp, char *path, caddr_t data, 
+	struct nameidata *ndp, struct proc *p)
+{
+	struct smbfs_args args; 	  /* will hold data from mount request */
+	struct smbmount *smp = NULL;
+	struct smb_vc *vcp;
+	struct smb_share *ssp = NULL;
+	struct vnode *vp;
+	struct smb_cred scred;
+#ifndef	FB_CURRENT
+	size_t size;
+#endif
+	int error;
+	char *pc, *pe;
+
+	if (data == NULL) {
+		printf("missing data argument\n");
+		return EINVAL;
+	}
+	if (mp->mnt_flag & MNT_UPDATE) {
+		printf("MNT_UPDATE not implemented");
+		return EOPNOTSUPP;
+	}
+	error = copyin(data, (caddr_t)&args, sizeof(struct smbfs_args));
+	if (error)
+		return error;
+	if (args.version != SMBFS_VERSION) {
+		printf("mount version mismatch: kernel=%d, mount=%d\n",
+		    SMBFS_VERSION, args.version);
+		return EINVAL;
+	}
+	smb_makescred(&scred, p, p->p_ucred);
+	error = smb_dev2share(args.dev, SMBM_EXEC, &scred, &ssp);
+	if (error) {
+		printf("invalid device handle %d (%d)\n", args.dev, error);
+		return error;
+	}
+	vcp = SSTOVC(ssp);
+	smb_share_unlock(ssp, 0, p);
+	mp->mnt_stat.f_iosize = SSTOVC(ssp)->vc_txmax;
+
+#ifdef SMBFS_USEZONE
+	smp = zalloc(smbfsmount_zone);
+#else
+        MALLOC(smp, struct smbmount*, sizeof(*smp), M_SMBFSDATA, M_USE_RESERVE);
+#endif
+        if (smp == NULL) {
+                printf("could not alloc smbmount\n");
+                error = ENOMEM;
+		goto bad;
+        }
+	bzero(smp, sizeof(*smp));
+        mp->mnt_data = (qaddr_t)smp;
+	smp->sm_hash = hashinit(desiredvnodes, M_SMBFSHASH, &smp->sm_hashlen);
+	if (smp->sm_hash == NULL)
+		goto bad;
+	lockinit(&smp->sm_hashlock, PVFS, "smbfsh", 0, 0);
+	smp->sm_share = ssp;
+	smp->sm_root = NULL;
+        smp->sm_args = args;
+	smp->sm_caseopt = args.caseopt;
+	smp->sm_args.file_mode = (smp->sm_args.file_mode &
+			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
+	smp->sm_args.dir_mode  = (smp->sm_args.dir_mode &
+			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
+
+/*	simple_lock_init(&smp->sm_npslock);*/
+#ifndef	FB_CURRENT
+	error = copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
+	if (error)
+		goto bad;
+	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
+#endif
+	pc = mp->mnt_stat.f_mntfromname;
+	pe = pc + sizeof(mp->mnt_stat.f_mntfromname);
+	bzero(pc, MNAMELEN);
+	*pc++ = '/';
+	*pc++ = '/';
+	pc=index(strncpy(pc, vcp->vc_username, pe - pc - 2), 0);
+	if (pc < pe-1) {
+		*(pc++) = '@';
+		pc = index(strncpy(pc, vcp->vc_srvname, pe - pc - 2), 0);
+		if (pc < pe - 1) {
+			*(pc++) = '/';
+			strncpy(pc, ssp->ss_name, pe - pc - 2);
+		}
+	}
+	/* protect against invalid mount points */
+	smp->sm_args.mount_point[sizeof(smp->sm_args.mount_point) - 1] = '\0';
+	vfs_getnewfsid(mp);
+	error = smbfs_root(mp, &vp);
+	if (error)
+		goto bad;
+	VOP_UNLOCK(vp, 0, p);
+	SMBVDEBUG("root.v_usecount = %d\n", vp->v_usecount);
+
+#ifdef DIAGNOSTICS
+	SMBERROR("mp=%p\n", mp);
+#endif
+	return error;
+bad:
+        if (smp) {
+		if (smp->sm_hash)
+			free(smp->sm_hash, M_SMBFSHASH);
+		lockdestroy(&smp->sm_hashlock);
+#ifdef SMBFS_USEZONE
+		zfree(smbfsmount_zone, smp);
+#else
+		free(smp, M_SMBFSDATA);
+#endif
+	}
+	if (ssp)
+		smb_share_put(ssp, &scred);
+        return error;
+}
+
+/* Unmount the filesystem described by mp. */
+static int
+smbfs_unmount(struct mount *mp, int mntflags, struct proc *p)
+{
+	struct smbmount *smp = VFSTOSMBFS(mp);
+	struct vnode *vp;
+	struct smb_cred scred;
+	int error, flags;
+
+	SMBVDEBUG("smbfs_unmount: flags=%04x\n", mntflags);
+	flags = 0;
+	if (mntflags & MNT_FORCE)
+		flags |= FORCECLOSE;
+	error = VFS_ROOT(mp, &vp);
+	if (error)
+		return (error);
+	if (vp->v_usecount > 2) {
+		printf("smbfs_unmount: usecnt=%d\n", vp->v_usecount);
+		vput(vp);
+		return EBUSY;
+	}
+	error = vflush(mp, vp, flags);
+	if (error) {
+		vput(vp);
+		return error;
+	}
+	vput(vp);
+	vrele(vp);
+	vgone(vp);
+	smb_makescred(&scred, p, p->p_ucred);
+	smb_share_put(smp->sm_share, &scred);
+	mp->mnt_data = (qaddr_t)0;
+
+	if (smp->sm_hash)
+		free(smp->sm_hash, M_SMBFSHASH);
+	lockdestroy(&smp->sm_hashlock);
+#ifdef SMBFS_USEZONE
+	zfree(smbfsmount_zone, smp);
+#else
+	free(smp, M_SMBFSDATA);
+#endif
+	mp->mnt_flag &= ~MNT_LOCAL;
+	return error;
+}
+
+/* 
+ * Return locked root vnode of a filesystem
+ */
+static int
+smbfs_root(struct mount *mp, struct vnode **vpp)
+{
+	struct smbmount *smp = VFSTOSMBFS(mp);
+	struct vnode *vp;
+	struct smbnode *np;
+	struct smbfattr fattr;
+	struct proc *p = curproc;
+	struct ucred *cred = p->p_ucred;
+	struct smb_cred scred;
+	int error;
+
+	if (smp == NULL) {
+		SMBERROR("smp == NULL (bug in umount)\n");
+		return EINVAL;
+	}
+	if (smp->sm_root) {
+		*vpp = SMBTOV(smp->sm_root);
+		return vget(*vpp, LK_EXCLUSIVE | LK_RETRY, p);
+	}
+	smb_makescred(&scred, p, cred);
+	error = smbfs_smb_lookup(NULL, NULL, 0, &fattr, &scred);
+	if (error)
+		return error;
+	error = smbfs_nget(mp, NULL, "TheRooT", 7, &fattr, &vp);
+	if (error)
+		return error;
+	vp->v_flag |= VROOT;
+	np = VTOSMB(vp);
+	smp->sm_root = np;
+	*vpp = vp;
+	return 0;
+}
+
+/*
+ * Vfs start routine, a no-op.
+ */
+/* ARGSUSED */
+static int
+smbfs_start(mp, flags, p)
+	struct mount *mp;
+	int flags;
+	struct proc *p;
+{
+	SMBVDEBUG("flags=%04x\n", flags);
+	return 0;
+}
+
+/*
+ * Do operations associated with quotas, not supported
+ */
+/* ARGSUSED */
+static int
+smbfs_quotactl(mp, cmd, uid, arg, p)
+	struct mount *mp;
+	int cmd;
+	uid_t uid;
+	caddr_t arg;
+	struct proc *p;
+{
+	SMBVDEBUG("return EOPNOTSUPP\n");
+	return EOPNOTSUPP;
+}
+
+/*ARGSUSED*/
+int
+smbfs_init(struct vfsconf *vfsp)
+{
+#ifndef SMP
+	int name[2];
+	int olen, ncpu, plen, error;
+
+	name[0] = CTL_HW;
+	name[1] = HW_NCPU;
+	error = kernel_sysctl(curproc, name, 2, &ncpu, &olen, NULL, 0, &plen);
+	if (error == 0 && ncpu > 1)
+		printf("warning: smbfs module compiled without SMP support.");
+#endif
+
+#ifdef SMBFS_USEZONE
+	smbfsmount_zone = zinit("SMBFSMOUNT", sizeof(struct smbmount), 0, 0, 1);
+#endif
+	smbfs_pbuf_freecnt = nswbuf / 2 + 1;
+	SMBVDEBUG("done.\n");
+	return 0;
+}
+
+/*ARGSUSED*/
+int
+smbfs_uninit(struct vfsconf *vfsp)
+{
+
+	SMBVDEBUG("done.\n");
+	return 0;
+}
+
+/*
+ * smbfs_statfs call
+ */
+int
+smbfs_statfs(struct mount *mp, struct statfs *sbp, struct proc *p)
+{
+	struct smbmount *smp = VFSTOSMBFS(mp);
+	struct smbnode *np = smp->sm_root;
+	struct smb_share *ssp = smp->sm_share;
+	struct smb_cred scred;
+	int error = 0;
+
+	if (np == NULL)
+		return EINVAL;
+	
+	sbp->f_iosize = SSTOVC(ssp)->vc_txmax;		/* optimal transfer block size */
+	sbp->f_spare2 = 0;			/* placeholder */
+	smb_makescred(&scred, p, p->p_ucred);
+
+	if (SMB_DIALECT(SSTOVC(ssp)) >= SMB_DIALECT_LANMAN2_0)
+		error = smbfs_smb_statfs2(ssp, sbp, &scred);
+	else
+		error = smbfs_smb_statfs(ssp, sbp, &scred);
+	if (error)
+		return error;
+	sbp->f_flags = 0;		/* copy of mount exported flags */
+	if (sbp != &mp->mnt_stat) {
+		sbp->f_fsid = mp->mnt_stat.f_fsid;	/* file system id */
+		sbp->f_owner = mp->mnt_stat.f_owner;	/* user that mounted the filesystem */
+		sbp->f_type = mp->mnt_vfc->vfc_typenum;	/* type of filesystem */
+		bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN);
+		bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN);
+	}
+	strncpy(sbp->f_fstypename, mp->mnt_vfc->vfc_name, MFSNAMELEN);
+	return 0;
+}
+
+/*
+ * Flush out the buffer cache
+ */
+/* ARGSUSED */
+static int
+smbfs_sync(mp, waitfor, cred, p)
+	struct mount *mp;
+	int waitfor;
+	struct ucred *cred;
+	struct proc *p;
+{
+	struct vnode *vp;
+	int error, allerror = 0;
+	/*
+	 * Force stale buffer cache information to be flushed.
+	 */
+loop:
+	for (vp = mp->mnt_vnodelist.lh_first;
+	     vp != NULL;
+	     vp = vp->v_mntvnodes.le_next) {
+		/*
+		 * If the vnode that we are about to sync is no longer
+		 * associated with this mount point, start over.
+		 */
+		if (vp->v_mount != mp)
+			goto loop;
+#ifndef FB_RELENG3
+		if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
+#else
+		if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
+#endif
+		    waitfor == MNT_LAZY)
+			continue;
+		if (vget(vp, LK_EXCLUSIVE, p))
+			goto loop;
+		error = VOP_FSYNC(vp, cred, waitfor, p);
+		if (error)
+			allerror = error;
+		vput(vp);
+	}
+	return (allerror);
+}
+
+#if __FreeBSD_version < 400009
+/*
+ * smbfs flat namespace lookup. Unsupported.
+ */
+/* ARGSUSED */
+static int smbfs_vget(mp, ino, vpp)
+	struct mount *mp;
+	ino_t ino;
+	struct vnode **vpp;
+{
+	return (EOPNOTSUPP);
+}
+
+/* ARGSUSED */
+static int smbfs_fhtovp(mp, fhp, nam, vpp, exflagsp, credanonp)
+	struct mount *mp;
+	struct fid *fhp;
+	struct sockaddr *nam;
+	struct vnode **vpp;
+	int *exflagsp;
+	struct ucred **credanonp;
+{
+	return (EINVAL);
+}
+
+/*
+ * Vnode pointer to File handle, should never happen either
+ */
+/* ARGSUSED */
+static int
+smbfs_vptofh(vp, fhp)
+	struct vnode *vp;
+	struct fid *fhp;
+{
+	return (EINVAL);
+}
+
+#endif /* __FreeBSD_version < 400009 */