Import kernel part of ncplib: netncp and nwfs

Reviewed by:	msmith, peter
Obtained from:	ncplib

1 files changed, 515 insertions, 0 deletions

diff --git a/sys/nwfs/nwfs_vfsops.c b/sys/nwfs/nwfs_vfsops.c
new file mode 100644
index 0000000..53ecf98
--- /dev/null
+++ b/sys/nwfs/nwfs_vfsops.c
@@ -0,0 +1,515 @@
+/*
+ * Copyright (c) 1999, 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_ncp.h"
+#ifndef NCP
+#error "NWFS requires NCP protocol"
+#endif
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/namei.h>
+#include <sys/proc.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 <sys/buf.h>
+
+#include <netncp/ncp.h>
+#include <netncp/ncp_conn.h>
+#include <netncp/ncp_sock.h>
+#include <netncp/ncp_subr.h>
+#include <netncp/ncp_ncp.h>
+#include <netncp/ncp_rq.h>
+#include <netncp/ncp_nls.h>
+
+#include <nwfs/nwfs.h>
+#include <nwfs/nwfs_node.h>
+#include <nwfs/nwfs_subr.h>
+
+int nwfs_debuglevel = 0;
+
+static int nwfs_version = NWFS_VERSION;
+
+SYSCTL_DECL(_vfs_nwfs);
+SYSCTL_NODE(_vfs, OID_AUTO, nwfs, CTLFLAG_RW, 0, "Netware file system");
+SYSCTL_INT(_vfs_nwfs, OID_AUTO, version, CTLFLAG_RD, &nwfs_version, 0, "");
+SYSCTL_INT(_vfs_nwfs, OID_AUTO, debuglevel, CTLFLAG_RW, &nwfs_debuglevel, 0, "");
+
+static int nwfs_mount __P((struct mount *, char *, caddr_t,
+			struct nameidata *, struct proc *));
+static int nwfs_quotactl __P((struct mount *, int, uid_t, caddr_t,
+			struct proc *));
+static int nwfs_root __P((struct mount *, struct vnode **));
+static int nwfs_start __P((struct mount *, int, struct proc *));
+static int nwfs_statfs __P((struct mount *, struct statfs *,
+			struct proc *));
+static int nwfs_sync __P((struct mount *, int, struct ucred *,
+			struct proc *));
+static int nwfs_unmount __P((struct mount *, int, struct proc *));
+static int nwfs_init __P((struct vfsconf *vfsp));
+static int nwfs_uninit __P((struct vfsconf *vfsp));
+
+static struct vfsops nwfs_vfsops = {
+	nwfs_mount,
+	nwfs_start,
+	nwfs_unmount,
+	nwfs_root,
+	nwfs_quotactl,
+	nwfs_statfs,
+	nwfs_sync,
+	vfs_stdvget,
+	vfs_stdfhtovp,		/* shouldn't happen */
+	vfs_stdcheckexp,
+	vfs_stdvptofh,		/* shouldn't happen */
+	nwfs_init,
+	nwfs_uninit
+};
+
+
+VFS_SET(nwfs_vfsops, nwfs, VFCF_NETWORK);
+
+int nwfs_pbuf_freecnt = -1;	/* start out unlimited */
+static int nwfsid = 1;
+
+static int
+nwfs_initnls(struct nwmount *nmp) {
+	char	*pc, *pe;
+	int	error = 0;
+#define COPY_TABLE(t,d)	{ \
+		if (t) { \
+			error = copyin((t), pc, 256); \
+			if (error) break; \
+		} else \
+			bcopy(d, pc, 256); \
+		(t) = pc; pc += 256; \
+	}
+
+	nmp->m.nls.opt |= NWHP_NLS | NWHP_DOS;
+	if ((nmp->m.flags & NWFS_MOUNT_HAVE_NLS) == 0) {
+		nmp->m.nls.tolower = ncp_defnls.tolower;
+		nmp->m.nls.toupper = ncp_defnls.toupper;
+		nmp->m.nls.n2u = ncp_defnls.n2u;
+		nmp->m.nls.u2n = ncp_defnls.u2n;
+		return 0;
+	}
+	MALLOC(pe, char *, 256 * 4, M_NWFSDATA, M_WAITOK);
+	if (pe == NULL) return ENOMEM;
+	pc = pe;
+	do {
+		COPY_TABLE(nmp->m.nls.tolower, ncp_defnls.tolower);
+		COPY_TABLE(nmp->m.nls.toupper, ncp_defnls.toupper);
+		COPY_TABLE(nmp->m.nls.n2u, ncp_defnls.n2u);
+		COPY_TABLE(nmp->m.nls.u2n, ncp_defnls.u2n);
+	} while(0);
+	if (error) {
+		free(pe, M_NWFSDATA);
+		return error;
+	}
+	return 0;
+}
+/*
+ * mp - path - addr in user space of mount point (ie /usr or whatever)
+ * data - addr in user space of mount params 
+ */
+static int nwfs_mount(struct mount *mp, char *path, caddr_t data, 
+		      struct nameidata *ndp, struct proc *p)
+{
+	struct nwfs_args args; 	  /* will hold data from mount request */
+	size_t size;
+	int error;
+	struct nwmount *nmp = NULL;
+	struct ncp_conn *conn = NULL;
+	struct ncp_handle *handle = NULL;
+	struct vnode *vp;
+	char *pc,*pe;
+
+	if (data == NULL) {
+		nwfs_printf("missing data argument\n");
+		return 1;
+	}
+	if (mp->mnt_flag & MNT_UPDATE) {
+		nwfs_printf("MNT_UPDATE not implemented");
+		return (EOPNOTSUPP);
+	}
+	error = copyin(data, (caddr_t)&args, sizeof(struct nwfs_args));
+	if (error)
+		return (error);
+	if (args.version != NWFS_VERSION) {
+		nwfs_printf("mount version mismatch: kernel=%d, mount=%d\n",NWFS_VERSION,args.version);
+		return (1);
+	}
+	error = ncp_conn_getbyref(args.connRef,p,p->p_ucred,NCPM_EXECUTE,&conn);
+	if (error) {
+		nwfs_printf("invalid connection refernce %d\n",args.connRef);
+		return (error);
+	}
+	error = ncp_conn_gethandle(conn, NULL, &handle);
+	if (error) {
+		nwfs_printf("can't get connection handle\n");
+		return (error);
+	}
+	ncp_conn_unlock(conn,p);	/* we keep the ref */
+	mp->mnt_stat.f_iosize = conn->buffer_size;
+        /* We must malloc our own mount info */
+        MALLOC(nmp,struct nwmount *,sizeof(struct nwmount),M_NWFSDATA,M_USE_RESERVE);
+        if (nmp == NULL) {
+                nwfs_printf("could not alloc nwmount\n");
+                error = ENOMEM;
+		goto bad;
+        }
+	bzero(nmp,sizeof(*nmp));
+        mp->mnt_data = (qaddr_t)nmp;
+	nmp->connh = handle;
+	nmp->n_root = NULL;
+	nmp->n_id = nwfsid++;
+        nmp->m = args;
+	nmp->m.file_mode = (nmp->m.file_mode &
+			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFREG;
+	nmp->m.dir_mode  = (nmp->m.dir_mode &
+			    (S_IRWXU|S_IRWXG|S_IRWXO)) | S_IFDIR;
+	if ((error = nwfs_initnls(nmp)) != 0) goto bad;
+	(void) copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &size);
+	bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
+	pc = mp->mnt_stat.f_mntfromname;
+	pe = pc+sizeof(mp->mnt_stat.f_mntfromname);
+	bzero(pc, MNAMELEN);
+	*(pc++) = '/';
+	pc = index(strncpy(pc, conn->li.server, pe-pc-2),0);
+	if (pc < pe-1) {
+		*(pc++) = ':';
+		pc=index(strncpy(pc, conn->li.user, pe-pc-2),0);
+		if (pc < pe-1) {
+			*(pc++) = '/';
+			strncpy(pc, nmp->m.mounted_vol, pe-pc-2);
+		}
+	}
+	/* protect against invalid mount points */
+	nmp->m.mount_point[sizeof(nmp->m.mount_point)-1] = '\0';
+	vfs_getnewfsid(mp);
+	error = nwfs_root(mp, &vp);
+	if (error)
+		goto bad;
+	/*
+	 * Lose the lock but keep the ref.
+	 */
+	VOP_UNLOCK(vp, 0, curproc);
+	NCPVODEBUG("rootvp.vrefcnt=%d\n",vp->v_usecount);
+	return error;
+bad:
+        if (nmp)
+		free(nmp, M_NWFSDATA);
+	if (handle)
+		ncp_conn_puthandle(handle, NULL, 0);
+        return error;
+}
+
+/* Unmount the filesystem described by mp. */
+static int
+nwfs_unmount(struct mount *mp, int mntflags, struct proc *p)
+{
+	struct nwmount *nmp = VFSTONWFS(mp);
+	struct ncp_conn *conn;
+	struct vnode *vp;
+	int error, flags;
+
+	NCPVODEBUG("nwfs_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("nwfs_unmount: usecnt=%d\n",vp->v_usecount);
+		vput(vp);
+		return (EBUSY);
+	}
+	error = vflush(mp, vp, flags);
+	if (error) {
+		vput(vp);
+		return (error);
+	}
+	/*
+	 * There are two reference counts and one lock to get rid of here.
+	 */
+	NCPVODEBUG("v_use: %d\n",vp->v_usecount);
+	vput(vp);
+	NCPVODEBUG("v_use after vput: %d\n",vp->v_usecount);
+	vrele(vp);
+	NCPVODEBUG("v_use after vrele: %d\n",vp->v_usecount);
+	vgone(vp);
+	NCPVODEBUG("v_gone finished !!!!\n");
+	conn = NWFSTOCONN(nmp);
+	ncp_conn_puthandle(nmp->connh,NULL,0);
+	if (ncp_conn_lock(conn,p,p->p_ucred,NCPM_WRITE | NCPM_EXECUTE) == 0) {
+		if(ncp_disconnect(conn))
+			ncp_conn_unlock(conn,p);
+	}
+	mp->mnt_data = (qaddr_t)0;
+	if (nmp->m.flags & NWFS_MOUNT_HAVE_NLS)
+		free(nmp->m.nls.tolower, M_NWFSDATA);
+	free(nmp, M_NWFSDATA);
+	mp->mnt_flag &= ~MNT_LOCAL;
+	return (error);
+}
+
+/*  Return locked vnode to root of a filesystem */
+static int
+nwfs_root(struct mount *mp, struct vnode **vpp) {
+	struct vnode *vp;
+	struct nwmount *nmp;
+	struct nwnode *np;
+	struct ncp_conn *conn;
+	struct nw_entry_info fattr;
+	struct proc *p = curproc;
+	struct ucred *cred = p->p_ucred;
+	int error, nsf, opt;
+	u_char vol;
+
+	nmp = VFSTONWFS(mp);
+	conn = NWFSTOCONN(nmp);
+	if (nmp->n_root) {
+		*vpp = NWTOV(nmp->n_root);
+		vget(*vpp, LK_EXCLUSIVE, curproc);
+		return 0;
+	}
+	error = ncp_lookup_volume(conn, nmp->m.mounted_vol, &vol, 
+		&nmp->n_rootent.f_id, p, cred);
+	if (error)
+		return ENOENT;
+	nmp->n_volume = vol;
+	error = ncp_get_namespaces(conn, vol, &nsf, p, cred);
+	if (error)
+		return ENOENT;
+	if (nsf & NW_NSB_OS2) {
+		NCPVODEBUG("volume %s has os2 namespace\n",nmp->m.mounted_vol);
+		if ((nmp->m.flags & NWFS_MOUNT_NO_OS2) == 0) {
+			nmp->name_space = NW_NS_OS2;
+			nmp->m.nls.opt &= ~NWHP_DOS;
+		}
+	}
+	opt = nmp->m.nls.opt;
+	nsf = opt & (NWHP_UPPER | NWHP_LOWER);
+	if (opt & NWHP_DOS) {
+		if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
+			nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
+		} else if (nsf == 0) {
+			nmp->m.nls.opt |= NWHP_LOWER;
+		}
+	} else {
+		if (nsf == (NWHP_UPPER | NWHP_LOWER)) {
+			nmp->m.nls.opt &= ~(NWHP_LOWER | NWHP_UPPER);
+		}
+	}
+	if (nmp->m.root_path[0]) {
+		nmp->m.root_path[0]--;
+		error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
+		    -nmp->m.root_path[0], nmp->m.root_path, &fattr, p, cred);
+		if (error) {
+			NCPFATAL("Invalid root path specified\n");
+			return ENOENT;
+		}
+		nmp->n_rootent.f_parent = fattr.dirEntNum;
+		nmp->m.root_path[0]++;
+		error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
+		    -nmp->m.root_path[0], nmp->m.root_path, &fattr, p, cred);
+		if (error) {
+			NCPFATAL("Invalid root path specified\n");
+			return ENOENT;
+		}
+		nmp->n_rootent.f_id = fattr.dirEntNum;
+	} else {
+		error = ncp_obtain_info(nmp, nmp->n_rootent.f_id,
+		    0, NULL, &fattr, p, cred);
+		if (error) {
+			NCPFATAL("Can't obtain volume info\n");
+			return ENOENT;
+		}
+		fattr.nameLen = strlen(strcpy(fattr.entryName, NWFS_ROOTVOL));
+		nmp->n_rootent.f_parent = nmp->n_rootent.f_id;
+	}
+	error = nwfs_nget(mp, nmp->n_rootent, &fattr, NULL, &vp);
+	if (error)
+		return (error);
+	vp->v_flag |= VROOT;
+	np = VTONW(vp);
+	if (nmp->m.root_path[0] == 0)
+		np->n_flag |= NVOLUME;
+	nmp->n_root = np;
+/*	error = VOP_GETATTR(vp, &vattr, cred, p);
+	if (error) {
+		vput(vp);
+		NCPFATAL("Can't get root directory entry\n");
+		return error;
+	}*/
+	*vpp = vp;
+	return (0);
+}
+
+/*
+ * Vfs start routine, a no-op.
+ */
+/* ARGSUSED */
+static int
+nwfs_start(mp, flags, p)
+	struct mount *mp;
+	int flags;
+	struct proc *p;
+{
+	NCPVODEBUG("flags=%04x\n",flags);
+	return (0);
+}
+
+/*
+ * Do operations associated with quotas, not supported
+ */
+/* ARGSUSED */
+static int
+nwfs_quotactl(mp, cmd, uid, arg, p)
+	struct mount *mp;
+	int cmd;
+	uid_t uid;
+	caddr_t arg;
+	struct proc *p;
+{
+	NCPVODEBUG("return EOPNOTSUPP\n");
+	return (EOPNOTSUPP);
+}
+
+/*ARGSUSED*/
+int
+nwfs_init(struct vfsconf *vfsp)
+{
+
+	nwfs_hash_init();
+	nwfs_pbuf_freecnt = nswbuf / 2 + 1;
+	NCPVODEBUG("always happy to load!\n");
+	return (0);
+}
+
+/*ARGSUSED*/
+int
+nwfs_uninit(struct vfsconf *vfsp)
+{
+
+	nwfs_hash_free();
+	NCPVODEBUG("unloaded\n");
+	return (0);
+}
+
+/*
+ * nwfs_statfs call
+ */
+int
+nwfs_statfs(mp, sbp, p)
+	struct mount *mp;
+	register struct statfs *sbp;
+	struct proc *p;
+{
+	struct nwmount *nmp = VFSTONWFS(mp);
+	int error = 0, secsize;
+	struct nwnode *np = nmp->n_root;
+	struct ncp_volume_info vi;
+
+	if (np == NULL) return EINVAL;
+	error = ncp_get_volume_info_with_number(NWFSTOCONN(nmp), nmp->n_volume, &vi,p,p->p_ucred);
+	if (error) return error;
+	secsize = 512;			/* XXX how to get real value ??? */
+	sbp->f_spare2=0;		/* placeholder */
+	/* fundamental file system block size */
+	sbp->f_bsize = vi.sectors_per_block*secsize;
+	/* optimal transfer block size */
+	sbp->f_iosize = NWFSTOCONN(nmp)->buffer_size;
+	/* total data blocks in file system */
+	sbp->f_blocks= vi.total_blocks;
+	/* free blocks in fs */
+	sbp->f_bfree = vi.free_blocks + vi.purgeable_blocks;
+	/* free blocks avail to non-superuser */
+	sbp->f_bavail= vi.free_blocks+vi.purgeable_blocks;
+	/* total file nodes in file system */
+	sbp->f_files = vi.total_dir_entries;
+	/* free file nodes in fs */
+	sbp->f_ffree = vi.available_dir_entries;
+	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
+nwfs_sync(mp, waitfor, cred, p)
+	struct mount *mp;
+	int waitfor;
+	struct ucred *cred;
+	struct proc *p;
+{
+	register 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;
+		if (VOP_ISLOCKED(vp) || TAILQ_EMPTY(&vp->v_dirtyblkhd) ||
+		    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);
+}