411 lines
11 KiB
C
411 lines
11 KiB
C
/*-
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* Copyright (c) 2000-2001 Boris Popov
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/fnv_hash.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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#include <sys/queue.h>
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#include <sys/stat.h>
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#include <sys/sx.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <sys/vnode.h>
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#include <netsmb/smb.h>
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#include <netsmb/smb_conn.h>
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#include <netsmb/smb_subr.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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/*#include <vm/vm_page.h>
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#include <vm/vm_object.h>*/
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#include <fs/smbfs/smbfs.h>
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#include <fs/smbfs/smbfs_node.h>
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#include <fs/smbfs/smbfs_subr.h>
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extern struct vop_vector smbfs_vnodeops; /* XXX -> .h file */
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static MALLOC_DEFINE(M_SMBNODE, "smbufs_node", "SMBFS vnode private part");
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static MALLOC_DEFINE(M_SMBNODENAME, "smbufs_nname", "SMBFS node name");
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u_int32_t __inline
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smbfs_hash(const u_char *name, int nmlen)
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{
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return (fnv_32_buf(name, nmlen, FNV1_32_INIT));
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}
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static char *
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smbfs_name_alloc(const u_char *name, int nmlen)
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{
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u_char *cp;
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nmlen++;
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cp = malloc(nmlen, M_SMBNODENAME, M_WAITOK);
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bcopy(name, cp, nmlen - 1);
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cp[nmlen - 1] = 0;
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return cp;
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}
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static void
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smbfs_name_free(u_char *name)
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{
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free(name, M_SMBNODENAME);
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}
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static int __inline
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smbfs_vnode_cmp(struct vnode *vp, void *_sc)
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{
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struct smbnode *np;
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struct smbcmp *sc;
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np = (struct smbnode *) vp->v_data;
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sc = (struct smbcmp *) _sc;
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if (np->n_parent != sc->n_parent || np->n_nmlen != sc->n_nmlen ||
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bcmp(sc->n_name, np->n_name, sc->n_nmlen) != 0)
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return 1;
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return 0;
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}
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static int
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smbfs_node_alloc(struct mount *mp, struct vnode *dvp, const char *dirnm,
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int dirlen, const char *name, int nmlen, char sep,
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struct smbfattr *fap, struct vnode **vpp)
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{
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struct vattr vattr;
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struct thread *td = curthread; /* XXX */
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struct smbmount *smp = VFSTOSMBFS(mp);
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struct smbnode *np, *dnp;
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struct vnode *vp, *vp2;
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struct smbcmp sc;
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char *p, *rpath;
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int error, rplen;
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sc.n_parent = dvp;
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sc.n_nmlen = nmlen;
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sc.n_name = name;
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if (smp->sm_root != NULL && dvp == NULL) {
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SMBERROR("do not allocate root vnode twice!\n");
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return EINVAL;
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}
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if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
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if (dvp == NULL)
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return EINVAL;
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vp = VTOSMB(VTOSMB(dvp)->n_parent)->n_vnode;
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error = vget(vp, LK_EXCLUSIVE, td);
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if (error == 0)
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*vpp = vp;
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return error;
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} else if (nmlen == 1 && name[0] == '.') {
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SMBERROR("do not call me with dot!\n");
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return EINVAL;
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}
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dnp = dvp ? VTOSMB(dvp) : NULL;
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if (dnp == NULL && dvp != NULL) {
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vn_printf(dvp, "smbfs_node_alloc: dead parent vnode ");
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return EINVAL;
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}
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error = vfs_hash_get(mp, smbfs_hash(name, nmlen), LK_EXCLUSIVE, td,
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vpp, smbfs_vnode_cmp, &sc);
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if (error)
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return (error);
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if (*vpp) {
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np = VTOSMB(*vpp);
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/* Force cached attributes to be refreshed if stale. */
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(void)VOP_GETATTR(*vpp, &vattr, td->td_ucred);
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/*
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* If the file type on the server is inconsistent with
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* what it was when we created the vnode, kill the
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* bogus vnode now and fall through to the code below
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* to create a new one with the right type.
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*/
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if (((*vpp)->v_type == VDIR &&
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(np->n_dosattr & SMB_FA_DIR) == 0) ||
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((*vpp)->v_type == VREG &&
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(np->n_dosattr & SMB_FA_DIR) != 0)) {
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vgone(*vpp);
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vput(*vpp);
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}
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else {
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SMBVDEBUG("vnode taken from the hashtable\n");
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return (0);
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}
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}
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/*
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* If we don't have node attributes, then it is an explicit lookup
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* for an existing vnode.
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*/
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if (fap == NULL)
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return ENOENT;
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error = getnewvnode("smbfs", mp, &smbfs_vnodeops, vpp);
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if (error)
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return (error);
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vp = *vpp;
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np = malloc(sizeof *np, M_SMBNODE, M_WAITOK | M_ZERO);
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rplen = dirlen;
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if (sep != '\0')
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rplen++;
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rplen += nmlen;
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rpath = malloc(rplen + 1, M_SMBNODENAME, M_WAITOK);
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p = rpath;
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bcopy(dirnm, p, dirlen);
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p += dirlen;
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if (sep != '\0')
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*p++ = sep;
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if (name != NULL) {
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bcopy(name, p, nmlen);
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p += nmlen;
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}
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*p = '\0';
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MPASS(p == rpath + rplen);
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lockmgr(vp->v_vnlock, LK_EXCLUSIVE, NULL);
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/* Vnode initialization */
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vp->v_type = fap->fa_attr & SMB_FA_DIR ? VDIR : VREG;
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vp->v_data = np;
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np->n_vnode = vp;
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np->n_mount = VFSTOSMBFS(mp);
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np->n_rpath = rpath;
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np->n_rplen = rplen;
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np->n_nmlen = nmlen;
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np->n_name = smbfs_name_alloc(name, nmlen);
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np->n_ino = fap->fa_ino;
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if (dvp) {
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ASSERT_VOP_LOCKED(dvp, "smbfs_node_alloc");
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np->n_parent = dvp;
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np->n_parentino = VTOSMB(dvp)->n_ino;
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if (/*vp->v_type == VDIR &&*/ (dvp->v_vflag & VV_ROOT) == 0) {
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vref(dvp);
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np->n_flag |= NREFPARENT;
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}
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} else if (vp->v_type == VREG)
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SMBERROR("new vnode '%s' born without parent ?\n", np->n_name);
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error = insmntque(vp, mp);
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if (error) {
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free(np, M_SMBNODE);
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return (error);
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}
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error = vfs_hash_insert(vp, smbfs_hash(name, nmlen), LK_EXCLUSIVE,
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td, &vp2, smbfs_vnode_cmp, &sc);
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if (error)
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return (error);
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if (vp2 != NULL)
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*vpp = vp2;
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return (0);
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}
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int
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smbfs_nget(struct mount *mp, struct vnode *dvp, const char *name, int nmlen,
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struct smbfattr *fap, struct vnode **vpp)
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{
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struct smbnode *dnp, *np;
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struct vnode *vp;
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int error, sep;
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dnp = (dvp) ? VTOSMB(dvp) : NULL;
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sep = 0;
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if (dnp != NULL) {
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sep = SMBFS_DNP_SEP(dnp);
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error = smbfs_node_alloc(mp, dvp, dnp->n_rpath, dnp->n_rplen,
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name, nmlen, sep, fap, &vp);
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} else
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error = smbfs_node_alloc(mp, NULL, "\\", 1, name, nmlen,
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sep, fap, &vp);
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if (error)
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return error;
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MPASS(vp != NULL);
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np = VTOSMB(vp);
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if (fap)
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smbfs_attr_cacheenter(vp, fap);
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*vpp = vp;
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return 0;
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}
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/*
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* Free smbnode, and give vnode back to system
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*/
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int
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smbfs_reclaim(ap)
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struct vop_reclaim_args /* {
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struct vnode *a_vp;
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struct thread *a_p;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct vnode *dvp;
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struct smbnode *np = VTOSMB(vp);
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struct smbmount *smp = VTOSMBFS(vp);
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SMBVDEBUG("%s,%d\n", np->n_name, vrefcnt(vp));
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KASSERT((np->n_flag & NOPEN) == 0, ("file not closed before reclaim"));
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/*
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* Destroy the vm object and flush associated pages.
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*/
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vnode_destroy_vobject(vp);
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dvp = (np->n_parent && (np->n_flag & NREFPARENT)) ?
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np->n_parent : NULL;
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/*
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* Remove the vnode from its hash chain.
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*/
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vfs_hash_remove(vp);
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if (np->n_name)
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smbfs_name_free(np->n_name);
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if (np->n_rpath)
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free(np->n_rpath, M_SMBNODENAME);
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free(np, M_SMBNODE);
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vp->v_data = NULL;
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if (dvp != NULL) {
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vrele(dvp);
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/*
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* Indicate that we released something; see comment
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* in smbfs_unmount().
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*/
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smp->sm_didrele = 1;
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}
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return 0;
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}
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int
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smbfs_inactive(ap)
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struct vop_inactive_args /* {
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struct vnode *a_vp;
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struct thread *a_td;
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} */ *ap;
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{
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struct thread *td = ap->a_td;
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struct ucred *cred = td->td_ucred;
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struct vnode *vp = ap->a_vp;
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struct smbnode *np = VTOSMB(vp);
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struct smb_cred *scred;
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struct vattr va;
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SMBVDEBUG("%s: %d\n", VTOSMB(vp)->n_name, vrefcnt(vp));
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if ((np->n_flag & NOPEN) != 0) {
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scred = smbfs_malloc_scred();
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smb_makescred(scred, td, cred);
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smbfs_vinvalbuf(vp, td);
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if (vp->v_type == VREG) {
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VOP_GETATTR(vp, &va, cred);
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smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
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&np->n_mtime, scred);
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} else if (vp->v_type == VDIR) {
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if (np->n_dirseq != NULL) {
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smbfs_findclose(np->n_dirseq, scred);
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np->n_dirseq = NULL;
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}
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}
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np->n_flag &= ~NOPEN;
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smbfs_attr_cacheremove(vp);
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smbfs_free_scred(scred);
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}
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if (np->n_flag & NGONE)
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vrecycle(vp);
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return (0);
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}
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/*
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* routines to maintain vnode attributes cache
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* smbfs_attr_cacheenter: unpack np.i to vattr structure
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*/
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void
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smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
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{
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struct smbnode *np = VTOSMB(vp);
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if (vp->v_type == VREG) {
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if (np->n_size != fap->fa_size) {
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np->n_size = fap->fa_size;
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vnode_pager_setsize(vp, np->n_size);
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}
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} else if (vp->v_type == VDIR) {
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np->n_size = 16384; /* should be a better way ... */
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} else
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return;
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np->n_mtime = fap->fa_mtime;
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np->n_dosattr = fap->fa_attr;
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np->n_attrage = time_second;
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return;
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}
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int
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smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
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{
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struct smbnode *np = VTOSMB(vp);
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struct smbmount *smp = VTOSMBFS(vp);
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int diff;
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diff = time_second - np->n_attrage;
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if (diff > 2) /* XXX should be configurable */
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return ENOENT;
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va->va_type = vp->v_type; /* vnode type (for create) */
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va->va_flags = 0; /* flags defined for file */
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if (vp->v_type == VREG) {
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va->va_mode = smp->sm_file_mode; /* files access mode and type */
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if (np->n_dosattr & SMB_FA_RDONLY) {
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va->va_mode &= ~(S_IWUSR|S_IWGRP|S_IWOTH);
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va->va_flags |= UF_READONLY;
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}
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} else if (vp->v_type == VDIR) {
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va->va_mode = smp->sm_dir_mode; /* files access mode and type */
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} else
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return EINVAL;
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va->va_size = np->n_size;
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va->va_nlink = 1; /* number of references to file */
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va->va_uid = smp->sm_uid; /* owner user id */
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va->va_gid = smp->sm_gid; /* owner group id */
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va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
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va->va_fileid = np->n_ino; /* file id */
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if (va->va_fileid == 0)
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va->va_fileid = 2;
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va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
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va->va_mtime = np->n_mtime;
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va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
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va->va_gen = VNOVAL; /* generation number of file */
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if (np->n_dosattr & SMB_FA_HIDDEN)
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va->va_flags |= UF_HIDDEN;
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if (np->n_dosattr & SMB_FA_SYSTEM)
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va->va_flags |= UF_SYSTEM;
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/*
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* We don't set the archive bit for directories.
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*/
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if ((vp->v_type != VDIR) && (np->n_dosattr & SMB_FA_ARCHIVE))
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va->va_flags |= UF_ARCHIVE;
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va->va_rdev = NODEV; /* device the special file represents */
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va->va_bytes = va->va_size; /* bytes of disk space held by file */
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va->va_filerev = 0; /* file modification number */
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va->va_vaflags = 0; /* operations flags */
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return 0;
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}
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