NetBSD/sys/smbfs/smbfs_node.c

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/* $NetBSD: smbfs_node.c,v 1.1 2000/12/07 03:33:47 deberg Exp $ */
/*
* Copyright (c) 2000, 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/mount.h>
#include <sys/vnode.h>
#include <sys/malloc.h>
#include <uvm/uvm_extern.h>
#include <sys/sysctl.h>
#ifndef NetBSD
#include <vm/vm_extern.h>
#endif
/*#include <vm/vm_page.h>
#include <vm/vm_object.h>*/
#include <sys/queue.h>
#include <sys/namei.h>
#include <sys/tree.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <netsmb/smb_lock.h>
#include <smbfs/smbfs.h>
#include <smbfs/smbfs_node.h>
#include <smbfs/smbfs_subr.h>
#define SMBFS_NOHASH(hval) (&smbfs_hashtbl[(hval) & smbfs_hashlen])
#define SLOCK_UNLOCK(id) do { \
if ((id) < 0) wakeup(&(id)); \
(id) = 0; \
} while(0);
#ifndef NetBSD
extern vop_t **smbfs_vnodeop_p;
MALLOC_DEFINE(M_SMBNODE, "SMBFS node", "SMBFS vnode private part");
MALLOC_DEFINE(M_SMBFSHASH, "SMBFS hash", "SMBFS hash table");
#endif
static LIST_HEAD(smbnode_hashhead, smbnode) *smbfs_hashtbl;
static u_long smbfs_hashlen;
static int smbfs_hashlock = 0;
#ifndef NetBSD
#if __FreeBSD_version > 500000
static int smbfs_hashprint(SYSCTL_HANDLER_ARGS);
#else
static int smbfs_hashprint SYSCTL_HANDLER_ARGS;
#endif
extern struct linker_set sysctl_vfs_smbfs;
#ifdef SYSCTL_DECL
SYSCTL_DECL(_vfs_smbfs);
#endif
SYSCTL_PROC(_vfs_smbfs, OID_AUTO, vnprint, CTLFLAG_WR|CTLTYPE_OPAQUE,
NULL, 0, smbfs_hashprint, "S,vnlist", "vnode hash");
#endif
void
smbfs_hash_init(void)
{
smbfs_hashtbl = hashinit(desiredvnodes, HASH_LIST, M_SMBFSHASH,
M_WAITOK, &smbfs_hashlen);
}
void
smbfs_hash_free(void)
{
free(smbfs_hashtbl, M_SMBFSHASH);
}
static u_long
smbfs_hash(const u_char *name, int nmlen)
{
u_long v;
for (v = 0; nmlen; name++, nmlen--)
v += *name;
return v;
}
#ifndef NetBSD
static int
#if __FreeBSD_version > 500000
smbfs_hashprint(SYSCTL_HANDLER_ARGS)
#else
smbfs_hashprint SYSCTL_HANDLER_ARGS
#endif
{
struct smbnode_hashhead *nhpp;
struct smbnode *np;
struct vnode *vp;
int i;
if (smbfs_debuglevel == 0)
return 0;
printf("Name:uc:hc:parent\n");
for(i = 0; i <= smbfs_hashlen; i++) {
nhpp = &smbfs_hashtbl[i];
for (np = nhpp->lh_first; np != 0; np = np->n_hash.le_next) {
vp = SMBTOV(np);
printf("%s:%d:%d\n", np->n_name, vp->v_usecount,
vp->v_holdcnt/*,
(np->n_parent != NULL) ? np->n_parent->n_name : "<noparent>"
*/);
}
}
return 0;
}
#endif
int
smbfs_node_alloc(struct mount *mp, struct vnode *dvp,
const char *name, int nmlen, struct vnode **vpp)
{
/* struct proc *p = curproc; */ /* XXX */
struct smbnode_hashhead *nhpp;
struct smbnode *np, *np2, *dnp;
extern int (**smbfs_vnodeop_p)__P((void *));
struct vnode *vp;
u_long hashval;
int error;
*vpp = NULL;
if (nmlen == 2 && bcmp(name, "..", 2) == 0) {
if (dvp == NULL)
return EINVAL;
vp = VTOSMB(dvp)->n_parent->n_vnode;
error = vget(vp, LK_EXCLUSIVE/* , p */);
if (error == 0)
*vpp = vp;
return error;
} else if (nmlen == 1 && name[0] == '.') {
SMBERROR("do not call me with dot!\n");
return EINVAL;
}
hashval = smbfs_hash(name, nmlen);
dnp = dvp ? VTOSMB(dvp) : NULL;
retry:
nhpp = SMBFS_NOHASH(hashval);
loop:
for (np = nhpp->lh_first; np; np = np->n_hash.le_next) {
vp = SMBTOV(np);
if (mp != vp->v_mount || np->n_parent != dnp ||
np->n_nmlen != nmlen || strcmp(name, np->n_name) != 0)
continue;
if (vget(vp, LK_EXCLUSIVE/* , p */))
goto loop;
*vpp = vp;
return(0);
}
if (smbfs_hashlock) {
while(smbfs_hashlock) {
smbfs_hashlock = -1;
tsleep((caddr_t)&smbfs_hashlock, PVFS, "smbhash", 0);
}
goto loop;
}
smbfs_hashlock = 1;
MALLOC(np, struct smbnode *, sizeof *np, M_SMBNODE, M_WAITOK);
error = getnewvnode(VT_SMBFS, mp, smbfs_vnodeop_p, &vp);
if (error) {
SLOCK_UNLOCK(smbfs_hashlock);
FREE(np, M_SMBNODE);
return error;
}
bzero(np, sizeof(*np));
vp->v_data = np;
np->n_vnode = vp;
np->n_mount = VFSTOSMBFS(mp);
np->n_nmlen = nmlen;
np->n_name = smb_memdup(name, nmlen + 1);
np->n_name[nmlen] = 0;
simple_spinlock_init(&np->n_rdirlock, "dirlck", PVFS);
for (np2 = nhpp->lh_first; np2 != 0; np2 = np->n_hash.le_next) {
if (mp != SMBTOV(np2)->v_mount || np->n_parent != dnp ||
np2->n_nmlen != nmlen || strcmp(name, np2->n_name) != 0)
continue;
vrele(vp);
smb_memfree(np->n_name);
FREE(np, M_SMBNODE);
SLOCK_UNLOCK(smbfs_hashlock);
goto retry;
}
LIST_INSERT_HEAD(nhpp, np, n_hash);
SLOCK_UNLOCK(smbfs_hashlock);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY/* , p */);
np->n_flag |= NNEW;
*vpp = vp;
return error;
}
/*
* Free smbnode, and give vnode back to system
*/
int
smbfs_reclaim(ap)
struct vop_reclaim_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = NULL;
struct smbnode *np = VTOSMB(vp);
struct smbmount *smp = VTOSMBFS(vp);
SMBVDEBUG("%s,%ld\n", np->n_name, vp->v_usecount);
if (np->n_parent && (np->n_flag & NREFPARENT))
dvp = np->n_parent->n_vnode;
LIST_REMOVE(np, n_hash);
cache_purge(vp);
if (smp->sm_root == np)
smp->sm_root = NULL;
vp->v_data = NULL;
if (np->n_name)
smb_memfree(np->n_name);
FREE(np, M_SMBNODE);
if (dvp)
vrele(dvp);
return 0;
}
int
smbfs_inactive(ap)
struct vop_inactive_args /* {
struct vnode *a_vp;
struct proc *a_p;
} */ *ap;
{
struct proc *p = ap->a_p;
struct ucred *cred = p->p_ucred;
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct smb_cred scred;
int error;
SMBVDEBUG("%s: %ld\n", VTOSMB(vp)->n_name, vp->v_usecount);
if (np->opened) {
error = smbfs_vinvalbuf(vp, V_SAVE, cred, p, 1);
smb_makescred(&scred, p, cred);
error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
&np->n_mtime, &scred);
np->opened = 0;
}
VOP_UNLOCK(vp, 0/* , p */);
return (0);
}
/*
* routines to maintain vnode attributes cache
* smbfs_attr_cacheenter: unpack np.i to vattr structure
*/
void
smbfs_attr_cacheenter(struct vnode *vp, struct smbfattr *fap)
{
struct smbnode *np = VTOSMB(vp);
if (vp->v_type == VREG) {
if (np->n_size != fap->fa_size) {
np->n_size = fap->fa_size;
#ifndef NetBSD
vnode_pager_setsize(vp, np->n_size);
#else
uvm_vnp_setsize(vp, np->n_size);
#endif
}
} else if (vp->v_type == VDIR) {
np->n_size = 16384; /* should be a better way ... */
} else
return;
np->n_mtime = fap->fa_mtime;
np->n_dosattr = fap->fa_attr;
np->n_attrage = mono_time.tv_sec;
return;
}
int
smbfs_attr_cachelookup(struct vnode *vp, struct vattr *va)
{
struct smbnode *np = VTOSMB(vp);
struct smbmount *smp = VTOSMBFS(vp);
int diff;
diff = mono_time.tv_sec - np->n_attrage;
if (diff > 2) /* XXX should be configurable */
return ENOENT;
va->va_type = vp->v_type; /* vnode type (for create) */
if (vp->v_type == VREG) {
va->va_mode = smp->sm_args.file_mode; /* files access mode and type */
} else if (vp->v_type == VDIR) {
va->va_mode = smp->sm_args.dir_mode; /* files access mode and type */
} else
return EINVAL;
va->va_size = np->n_size;
va->va_nlink = 1; /* number of references to file */
va->va_uid = smp->sm_args.uid; /* owner user id */
va->va_gid = smp->sm_args.gid; /* owner group id */
va->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
va->va_fileid = np->n_ino; /* file id */
if (va->va_fileid == 0)
va->va_fileid = 2;
va->va_blocksize = SSTOVC(smp->sm_share)->vc_txmax;
va->va_mtime = np->n_mtime;
va->va_atime = va->va_ctime = va->va_mtime; /* time file changed */
va->va_gen = VNOVAL; /* generation number of file */
va->va_flags = 0; /* flags defined for file */
va->va_rdev = VNOVAL; /* device the special file represents */
va->va_bytes = va->va_size; /* bytes of disk space held by file */
va->va_filerev = 0; /* file modification number */
va->va_vaflags = 0; /* operations flags */
return 0;
}