356 lines
9.5 KiB
C
356 lines
9.5 KiB
C
/* $NetBSD: smbfs_node.c,v 1.2 2001/11/10 13:22:20 lukem Exp $ */
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/*
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* Copyright (c) 2000, 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Boris Popov.
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* 4. Neither the name of the author nor the names of any co-contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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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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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: smbfs_node.c,v 1.2 2001/11/10 13:22:20 lukem Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/time.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/malloc.h>
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#include <uvm/uvm_extern.h>
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#include <sys/sysctl.h>
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#ifndef NetBSD
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#include <vm/vm_extern.h>
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#endif
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/*#include <vm/vm_page.h>
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#include <vm/vm_object.h>*/
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#include <sys/queue.h>
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#include <sys/namei.h>
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#include <sys/tree.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 <netsmb/smb_lock.h>
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#include <smbfs/smbfs.h>
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#include <smbfs/smbfs_node.h>
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#include <smbfs/smbfs_subr.h>
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#define SMBFS_NOHASH(hval) (&smbfs_hashtbl[(hval) & smbfs_hashlen])
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#define SLOCK_UNLOCK(id) do { \
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if ((id) < 0) wakeup(&(id)); \
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(id) = 0; \
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} while(0);
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#ifndef NetBSD
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extern vop_t **smbfs_vnodeop_p;
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MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
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MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
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#endif
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static LIST_HEAD(smbnode_hashhead, smbnode) *smbfs_hashtbl;
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static u_long smbfs_hashlen;
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static int smbfs_hashlock = 0;
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#ifndef NetBSD
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#if __FreeBSD_version > 500000
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static int smbfs_hashprint(SYSCTL_HANDLER_ARGS);
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#else
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static int smbfs_hashprint SYSCTL_HANDLER_ARGS;
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#endif
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extern struct linker_set sysctl_vfs_smbfs;
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#ifdef SYSCTL_DECL
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SYSCTL_DECL(_vfs_smbfs);
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#endif
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SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
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NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
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#endif
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void
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smbfs_hash_init(void)
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{
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smbfs_hashtbl = hashinit(desiredvnodes, HASH_LIST, M_SMBFSHASH,
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M_WAITOK, &smbfs_hashlen);
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}
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void
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smbfs_hash_free(void)
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{
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free(smbfs_hashtbl, M_SMBFSHASH);
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}
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static u_long
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smbfs_hash(const u_char *name, int nmlen)
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{
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u_long v;
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for (v = 0; nmlen; name++, nmlen--)
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v += *name;
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return v;
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}
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#ifndef NetBSD
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static int
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#if __FreeBSD_version > 500000
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smbfs_hashprint(SYSCTL_HANDLER_ARGS)
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#else
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smbfs_hashprint SYSCTL_HANDLER_ARGS
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#endif
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{
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struct smbnode_hashhead *nhpp;
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struct smbnode *np;
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struct vnode *vp;
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int i;
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if (smbfs_debuglevel == 0)
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return 0;
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printf("Name:uc:hc:parent\n");
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for(i = 0; i <= smbfs_hashlen; i++) {
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nhpp = &smbfs_hashtbl[i];
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for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
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vp = SMBTOV(np);
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printf("%s:%d:%d\n", np->n_name, vp->v_usecount,
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vp->v_holdcnt/*,
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(np->n_parent != NULL) ? np->n_parent->n_name : "<noparent>"
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*/);
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}
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}
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return 0;
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}
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#endif
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int
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smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
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const char *name, int nmlen, struct vnode **vpp)
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{
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/* struct proc *p = curproc; */ /* XXX */
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struct smbnode_hashhead *nhpp;
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struct smbnode *np, *np2, *dnp;
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extern int (**smbfs_vnodeop_p)__P((void *));
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struct vnode *vp;
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u_long hashval;
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int error;
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*vpp = NULL;
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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(dvp)->n_parent->n_vnode;
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error = vget(vp, LK_EXCLUSIVE/* , p */);
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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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hashval = smbfs_hash(name, nmlen);
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dnp = dvp ? VTOSMB(dvp) : NULL;
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retry:
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nhpp = SMBFS_NOHASH(hashval);
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loop:
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for (np = nhpp->lh_first; np; np = np->n_hash.le_next) {
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vp = SMBTOV(np);
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if (mp != vp->v_mount || np->n_parent != dnp ||
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np->n_nmlen != nmlen || strcmp(name, np->n_name) != 0)
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continue;
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if (vget(vp, LK_EXCLUSIVE/* , p */))
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goto loop;
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*vpp = vp;
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return(0);
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}
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if (smbfs_hashlock) {
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while(smbfs_hashlock) {
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smbfs_hashlock = -1;
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tsleep((caddr_t)&smbfs_hashlock, PVFS, "smbhash", 0);
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}
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goto loop;
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}
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smbfs_hashlock = 1;
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MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
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error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp);
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if (error) {
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SLOCK_UNLOCK(smbfs_hashlock);
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FREE(np, M_SMBNODE);
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return error;
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}
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bzero(np, sizeof(*np));
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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_nmlen = nmlen;
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np->n_name = smb_memdup(name, nmlen + 1);
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np->n_name[nmlen] = 0;
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simple_spinlock_init(&np->n_rdirlock, "dirlck", PVFS);
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for (np2 = nhpp->lh_first; np2 != 0; np2 = np->n_hash.le_next) {
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if (mp != SMBTOV(np2)->v_mount || np->n_parent != dnp ||
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np2->n_nmlen != nmlen || strcmp(name, np2->n_name) != 0)
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continue;
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vrele(vp);
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smb_memfree(np->n_name);
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FREE(np, M_SMBNODE);
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SLOCK_UNLOCK(smbfs_hashlock);
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goto retry;
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}
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LIST_INSERT_HEAD(nhpp, np, n_hash);
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SLOCK_UNLOCK(smbfs_hashlock);
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY/* , p */);
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np->n_flag |= NNEW;
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*vpp = vp;
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return error;
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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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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct vnode *dvp = NULL;
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struct smbnode *np = VTOSMB(vp);
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struct smbmount *smp = VTOSMBFS(vp);
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SMBVDEBUG("%s,%ld\n", np->n_name, vp->v_usecount);
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if (np->n_parent && (np->n_flag & NREFPARENT))
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dvp = np->n_parent->n_vnode;
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LIST_REMOVE(np, n_hash);
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cache_purge(vp);
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if (smp->sm_root == np)
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smp->sm_root = NULL;
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vp->v_data = NULL;
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if (np->n_name)
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smb_memfree(np->n_name);
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FREE(np, M_SMBNODE);
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if (dvp)
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vrele(dvp);
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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 proc *a_p;
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} */ *ap;
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{
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struct proc *p = ap->a_p;
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struct ucred *cred = p->p_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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int error;
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SMBVDEBUG("%s: %ld\n", VTOSMB(vp)->n_name, vp->v_usecount);
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if (np->opened) {
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error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
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smb_makescred(&scred, p, cred);
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error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
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&np->n_mtime, &scred);
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np->opened = 0;
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}
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VOP_UNLOCK(vp, 0/* , p */);
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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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#ifndef NetBSD
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vnode_pager_setsize(vp, np->n_size);
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#else
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uvm_vnp_setsize(vp, np->n_size);
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#endif
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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 = mono_time.tv_sec;
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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 = mono_time.tv_sec - 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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if (vp->v_type == VREG) {
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va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
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} else if (vp->v_type == VDIR) {
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va->va_mode = smp->sm_args.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_args.uid; /* owner user id */
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va->va_gid = smp->sm_args.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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va->va_flags = 0; /* flags defined for file */
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va->va_rdev = VNOVAL; /* 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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