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freebsd-dev/sys/fs/nwfs/nwfs_vnops.c
Jeff Roberson 4585e3ac5a - Change all filesystems and vfs_cache to relock the dvp once the child is 
locked in the ISDOTDOT case.  Se vfs_lookup.c r1.79 for details.

Sponsored by:	Isilon Systems, Inc.
2005-04-13 10:59:09 +00:00

997 lines
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/*-
* Copyright (c) 1999, 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 <sys/param.h>
#include <sys/systm.h>
#include <sys/namei.h>
#include <sys/kernel.h>
#include <sys/bio.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/mount.h>
#include <sys/unistd.h>
#include <sys/vnode.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <machine/mutex.h>
#include <netncp/ncp.h>
#include <netncp/ncp_conn.h>
#include <netncp/ncp_subr.h>
#include <netncp/nwerror.h>
#include <netncp/ncp_nls.h>
#include <fs/nwfs/nwfs.h>
#include <fs/nwfs/nwfs_node.h>
#include <fs/nwfs/nwfs_subr.h>
/*
* Prototypes for NWFS vnode operations
*/
static vop_create_t nwfs_create;
static vop_mknod_t nwfs_mknod;
static vop_open_t nwfs_open;
static vop_close_t nwfs_close;
static vop_access_t nwfs_access;
static vop_getattr_t nwfs_getattr;
static vop_setattr_t nwfs_setattr;
static vop_read_t nwfs_read;
static vop_write_t nwfs_write;
static vop_fsync_t nwfs_fsync;
static vop_remove_t nwfs_remove;
static vop_link_t nwfs_link;
static vop_lookup_t nwfs_lookup;
static vop_rename_t nwfs_rename;
static vop_mkdir_t nwfs_mkdir;
static vop_rmdir_t nwfs_rmdir;
static vop_symlink_t nwfs_symlink;
static vop_readdir_t nwfs_readdir;
static vop_strategy_t nwfs_strategy;
static vop_print_t nwfs_print;
static vop_pathconf_t nwfs_pathconf;
/* Global vfs data structures for nwfs */
struct vop_vector nwfs_vnodeops = {
.vop_default = &default_vnodeops,
.vop_access = nwfs_access,
.vop_close = nwfs_close,
.vop_create = nwfs_create,
.vop_fsync = nwfs_fsync,
.vop_getattr = nwfs_getattr,
.vop_getpages = nwfs_getpages,
.vop_inactive = nwfs_inactive,
.vop_ioctl = nwfs_ioctl,
.vop_link = nwfs_link,
.vop_lookup = nwfs_lookup,
.vop_mkdir = nwfs_mkdir,
.vop_mknod = nwfs_mknod,
.vop_open = nwfs_open,
.vop_pathconf = nwfs_pathconf,
.vop_print = nwfs_print,
.vop_putpages = nwfs_putpages,
.vop_read = nwfs_read,
.vop_readdir = nwfs_readdir,
.vop_reclaim = nwfs_reclaim,
.vop_remove = nwfs_remove,
.vop_rename = nwfs_rename,
.vop_rmdir = nwfs_rmdir,
.vop_setattr = nwfs_setattr,
.vop_strategy = nwfs_strategy,
.vop_symlink = nwfs_symlink,
.vop_write = nwfs_write,
};
/*
* nwfs_access vnode op
*/
static int
nwfs_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
mode_t mpmode;
struct nwmount *nmp = VTONWFS(vp);
NCPVNDEBUG("\n");
if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
switch (vp->v_type) {
case VREG: case VDIR: case VLNK:
return (EROFS);
default:
break;
}
}
mpmode = vp->v_type == VREG ? nmp->m.file_mode :
nmp->m.dir_mode;
return (vaccess(vp->v_type, mpmode, nmp->m.uid,
nmp->m.gid, ap->a_mode, ap->a_cred, NULL));
}
/*
* nwfs_open vnode op
*/
/* ARGSUSED */
static int
nwfs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
int mode = ap->a_mode;
struct nwnode *np = VTONW(vp);
struct ncp_open_info no;
struct nwmount *nmp = VTONWFS(vp);
struct vattr vattr;
int error, nwm;
NCPVNDEBUG("%s,%d\n", np->n_name, np->opened);
if (vp->v_type != VREG && vp->v_type != VDIR) {
NCPFATAL("open vtype = %d\n", vp->v_type);
return (EACCES);
}
if (vp->v_type == VDIR) return 0; /* nothing to do now */
if (np->n_flag & NMODIFIED) {
if ((error = nwfs_vinvalbuf(vp, ap->a_td)) == EINTR)
return (error);
np->n_atime = 0;
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);
if (error) return (error);
np->n_mtime = vattr.va_mtime.tv_sec;
} else {
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);
if (error) return (error);
if (np->n_mtime != vattr.va_mtime.tv_sec) {
if ((error = nwfs_vinvalbuf(vp, ap->a_td)) == EINTR)
return (error);
np->n_mtime = vattr.va_mtime.tv_sec;
}
}
if (np->opened) {
np->opened++;
return 0;
}
nwm = AR_READ;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
nwm |= AR_WRITE;
error = ncp_open_create_file_or_subdir(nmp, vp, 0, NULL, OC_MODE_OPEN,
0, nwm, &no, ap->a_td, ap->a_cred);
if (error) {
if (mode & FWRITE)
return EACCES;
nwm = AR_READ;
error = ncp_open_create_file_or_subdir(nmp, vp, 0, NULL, OC_MODE_OPEN, 0,
nwm, &no, ap->a_td, ap->a_cred);
}
if (!error) {
np->opened++;
np->n_fh = no.fh;
np->n_origfh = no.origfh;
}
np->n_atime = 0;
return (error);
}
static int
nwfs_close(ap)
struct vop_close_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct nwnode *np = VTONW(vp);
int error;
NCPVNDEBUG("name=%s,pid=%d,c=%d\n", np->n_name, ap->a_td->td_proc->p_pid,
np->opened);
if (vp->v_type == VDIR) return 0; /* nothing to do now */
error = 0;
mtx_lock(&vp->v_interlock);
if (np->opened == 0) {
mtx_unlock(&vp->v_interlock);
return 0;
}
mtx_unlock(&vp->v_interlock);
error = nwfs_vinvalbuf(vp, ap->a_td);
mtx_lock(&vp->v_interlock);
if (np->opened == 0) {
mtx_unlock(&vp->v_interlock);
return 0;
}
if (--np->opened == 0) {
mtx_unlock(&vp->v_interlock);
error = ncp_close_file(NWFSTOCONN(VTONWFS(vp)), &np->n_fh,
ap->a_td, ap->a_cred);
} else
mtx_unlock(&vp->v_interlock);
np->n_atime = 0;
return (error);
}
/*
* nwfs_getattr call from vfs.
*/
static int
nwfs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct nwnode *np = VTONW(vp);
struct vattr *va=ap->a_vap;
struct nwmount *nmp = VTONWFS(vp);
struct nw_entry_info fattr;
int error;
u_int32_t oldsize;
NCPVNDEBUG("%lx:%d: '%s' %d\n", (long)vp, nmp->n_volume, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
error = nwfs_attr_cachelookup(vp, va);
if (!error) return 0;
NCPVNDEBUG("not in cache\n");
oldsize = np->n_size;
if (np->n_flag & NVOLUME) {
error = ncp_obtain_info(nmp, np->n_fid.f_id, 0, NULL, &fattr,
ap->a_td, ap->a_cred);
} else {
error = ncp_obtain_info(nmp, np->n_fid.f_parent, np->n_nmlen,
np->n_name, &fattr, ap->a_td, ap->a_cred);
}
if (error) {
NCPVNDEBUG("error %d\n", error);
return error;
}
nwfs_attr_cacheenter(vp, &fattr);
*va = np->n_vattr;
if (np->opened)
np->n_size = oldsize;
return (0);
}
/*
* nwfs_setattr call from vfs.
*/
static int
nwfs_setattr(ap)
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct nwnode *np = VTONW(vp);
struct vattr *vap = ap->a_vap;
u_quad_t tsize=0;
int error = 0;
NCPVNDEBUG("\n");
if (vap->va_flags != VNOVAL)
return (EOPNOTSUPP);
/*
* Disallow write attempts if the filesystem is mounted read-only.
*/
if ((vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL ||
vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL ||
vap->va_mode != (mode_t)VNOVAL) &&(vp->v_mount->mnt_flag & MNT_RDONLY))
return (EROFS);
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
return (EISDIR);
case VREG:
/*
* Disallow write attempts if the filesystem is
* mounted read-only.
*/
if (vp->v_mount->mnt_flag & MNT_RDONLY)
return (EROFS);
vnode_pager_setsize(vp, (u_long)vap->va_size);
tsize = np->n_size;
np->n_size = vap->va_size;
break;
default:
return EINVAL;
};
}
error = ncp_setattr(vp, vap, ap->a_cred, ap->a_td);
if (error && vap->va_size != VNOVAL) {
np->n_size = tsize;
vnode_pager_setsize(vp, (u_long)tsize);
}
np->n_atime = 0; /* invalidate cache */
VOP_GETATTR(vp, vap, ap->a_cred, ap->a_td);
np->n_mtime = vap->va_mtime.tv_sec;
return (0);
}
/*
* nwfs_read call.
*/
static int
nwfs_read(ap)
struct vop_read_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct uio *uio=ap->a_uio;
int error;
NCPVNDEBUG("nwfs_read:\n");
if (vp->v_type != VREG && vp->v_type != VDIR)
return (EPERM);
error = nwfs_readvnode(vp, uio, ap->a_cred);
return error;
}
static int
nwfs_write(ap)
struct vop_write_args /* {
struct vnode *a_vp;
struct uio *a_uio;
int a_ioflag;
struct ucred *a_cred;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int error;
NCPVNDEBUG("%d,ofs=%d,sz=%d\n", vp->v_type, (int)uio->uio_offset, uio->uio_resid);
if (vp->v_type != VREG)
return (EPERM);
error = nwfs_writevnode(vp, uio, ap->a_cred, ap->a_ioflag);
return(error);
}
/*
* nwfs_create call
* Create a regular file. On entry the directory to contain the file being
* created is locked. We must release before we return. We must also free
* the pathname buffer pointed at by cnp->cn_pnbuf, always on error, or
* only if the SAVESTART bit in cn_flags is clear on success.
*/
static int
nwfs_create(ap)
struct vop_create_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
struct vnode *dvp = ap->a_dvp;
struct vattr *vap = ap->a_vap;
struct vnode **vpp=ap->a_vpp;
struct componentname *cnp = ap->a_cnp;
struct vnode *vp = (struct vnode *)0;
int error = 0, fmode;
struct vattr vattr;
struct nwnode *np;
struct ncp_open_info no;
struct nwmount *nmp=VTONWFS(dvp);
ncpfid fid;
NCPVNDEBUG("\n");
*vpp = NULL;
if (vap->va_type == VSOCK)
return (EOPNOTSUPP);
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_thread))) {
return (error);
}
fmode = AR_READ | AR_WRITE;
/* if (vap->va_vaflags & VA_EXCLUSIVE)
fmode |= AR_DENY_READ | AR_DENY_WRITE;*/
error = ncp_open_create_file_or_subdir(nmp, dvp, cnp->cn_namelen, cnp->cn_nameptr,
OC_MODE_CREATE | OC_MODE_OPEN | OC_MODE_REPLACE,
0, fmode, &no, cnp->cn_thread, cnp->cn_cred);
if (!error) {
error = ncp_close_file(NWFSTOCONN(nmp), &no.fh, cnp->cn_thread, cnp->cn_cred);
fid.f_parent = VTONW(dvp)->n_fid.f_id;
fid.f_id = no.fattr.dirEntNum;
error = nwfs_nget(VTOVFS(dvp), fid, &no.fattr, dvp, &vp);
if (!error) {
np = VTONW(vp);
np->opened = 0;
*vpp = vp;
}
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, vp, cnp);
}
return (error);
}
/*
* nwfs_remove call. It isn't possible to emulate UFS behaivour because
* NetWare doesn't allow delete/rename operations on an opened file.
*/
static int
nwfs_remove(ap)
struct vop_remove_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_dvp;
struct vnode * a_vp;
struct componentname * a_cnp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
struct nwnode *np = VTONW(vp);
struct nwmount *nmp = VTONWFS(vp);
int error;
if (vp->v_type == VDIR || np->opened || vrefcnt(vp) != 1)
return EPERM;
cache_purge(vp);
error = ncp_DeleteNSEntry(nmp, VTONW(dvp)->n_fid.f_id,
cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_thread, cnp->cn_cred);
if (error == 0)
np->n_flag |= NSHOULDFREE;
else if (error == 0x899c)
error = EACCES;
return (error);
}
/*
* nwfs_file rename call
*/
static int
nwfs_rename(ap)
struct vop_rename_args /* {
struct vnode *a_fdvp;
struct vnode *a_fvp;
struct componentname *a_fcnp;
struct vnode *a_tdvp;
struct vnode *a_tvp;
struct componentname *a_tcnp;
} */ *ap;
{
struct vnode *fvp = ap->a_fvp;
struct vnode *tvp = ap->a_tvp;
struct vnode *fdvp = ap->a_fdvp;
struct vnode *tdvp = ap->a_tdvp;
struct componentname *tcnp = ap->a_tcnp;
struct componentname *fcnp = ap->a_fcnp;
struct nwmount *nmp=VTONWFS(fvp);
u_int16_t oldtype = 6;
int error=0;
/* Check for cross-device rename */
if ((fvp->v_mount != tdvp->v_mount) ||
(tvp && (fvp->v_mount != tvp->v_mount))) {
error = EXDEV;
goto out;
}
if (tvp && vrefcnt(tvp) > 1) {
error = EBUSY;
goto out;
}
if (fvp->v_type == VDIR) {
oldtype |= NW_TYPE_SUBDIR;
} else if (fvp->v_type == VREG) {
oldtype |= NW_TYPE_FILE;
} else {
error = EINVAL;
goto out;
}
if (tvp && tvp != fvp) {
error = ncp_DeleteNSEntry(nmp, VTONW(tdvp)->n_fid.f_id,
tcnp->cn_namelen, tcnp->cn_nameptr,
tcnp->cn_thread, tcnp->cn_cred);
if (error == 0x899c) error = EACCES;
if (error)
goto out_cacherem;
}
error = ncp_nsrename(NWFSTOCONN(nmp), nmp->n_volume, nmp->name_space,
oldtype, &nmp->m.nls,
VTONW(fdvp)->n_fid.f_id, fcnp->cn_nameptr, fcnp->cn_namelen,
VTONW(tdvp)->n_fid.f_id, tcnp->cn_nameptr, tcnp->cn_namelen,
tcnp->cn_thread, tcnp->cn_cred);
if (error == 0x8992)
error = EEXIST;
if (fvp->v_type == VDIR) {
if (tvp != NULL && tvp->v_type == VDIR)
cache_purge(tdvp);
cache_purge(fdvp);
}
out_cacherem:
nwfs_attr_cacheremove(fdvp);
nwfs_attr_cacheremove(tdvp);
nwfs_attr_cacheremove(fvp);
out:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
if (tvp)
nwfs_attr_cacheremove(tvp);
/*
* Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
*/
if (error == ENOENT)
error = 0;
return (error);
}
/*
* nwfs hard link create call
* Netware filesystems don't know what links are.
*/
static int
nwfs_link(ap)
struct vop_link_args /* {
struct vnode *a_tdvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
return EOPNOTSUPP;
}
/*
* nwfs_symlink link create call
* Netware filesystems don't know what symlinks are.
*/
static int
nwfs_symlink(ap)
struct vop_symlink_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
char *a_target;
} */ *ap;
{
return (EOPNOTSUPP);
}
static int nwfs_mknod(ap)
struct vop_mknod_args /* {
} */ *ap;
{
return (EOPNOTSUPP);
}
/*
* nwfs_mkdir call
*/
static int
nwfs_mkdir(ap)
struct vop_mkdir_args /* {
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
struct vattr *a_vap;
} */ *ap;
{
struct vnode *dvp = ap->a_dvp;
/* struct vattr *vap = ap->a_vap;*/
struct componentname *cnp = ap->a_cnp;
int len=cnp->cn_namelen;
struct ncp_open_info no;
struct nwnode *np;
struct vnode *newvp = (struct vnode *)0;
ncpfid fid;
int error = 0;
struct vattr vattr;
char *name=cnp->cn_nameptr;
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred, cnp->cn_thread))) {
return (error);
}
if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.')))) {
return EEXIST;
}
if (ncp_open_create_file_or_subdir(VTONWFS(dvp), dvp, cnp->cn_namelen,
cnp->cn_nameptr, OC_MODE_CREATE, aDIR, 0xffff,
&no, cnp->cn_thread, cnp->cn_cred) != 0) {
error = EACCES;
} else {
error = 0;
}
if (!error) {
fid.f_parent = VTONW(dvp)->n_fid.f_id;
fid.f_id = no.fattr.dirEntNum;
error = nwfs_nget(VTOVFS(dvp), fid, &no.fattr, dvp, &newvp);
if (!error) {
np = VTONW(newvp);
newvp->v_type = VDIR;
*ap->a_vpp = newvp;
}
}
return (error);
}
/*
* nwfs_remove directory call
*/
static int
nwfs_rmdir(ap)
struct vop_rmdir_args /* {
struct vnode *a_dvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
struct nwnode *np = VTONW(vp);
struct nwmount *nmp = VTONWFS(vp);
struct nwnode *dnp = VTONW(dvp);
int error = EIO;
if (dvp == vp)
return EINVAL;
error = ncp_DeleteNSEntry(nmp, dnp->n_fid.f_id,
cnp->cn_namelen, cnp->cn_nameptr, cnp->cn_thread, cnp->cn_cred);
if (error == 0)
np->n_flag |= NSHOULDFREE;
else if (error == NWE_DIR_NOT_EMPTY)
error = ENOTEMPTY;
dnp->n_flag |= NMODIFIED;
nwfs_attr_cacheremove(dvp);
cache_purge(dvp);
cache_purge(vp);
return (error);
}
/*
* nwfs_readdir call
*/
static int
nwfs_readdir(ap)
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
struct ucred *a_cred;
int *a_eofflag;
u_long *a_cookies;
int a_ncookies;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int error;
if (vp->v_type != VDIR)
return (EPERM);
if (ap->a_ncookies) {
printf("nwfs_readdir: no support for cookies now...");
return (EOPNOTSUPP);
}
error = nwfs_readvnode(vp, uio, ap->a_cred);
return error;
}
/* ARGSUSED */
static int
nwfs_fsync(ap)
struct vop_fsync_args /* {
struct vnodeop_desc *a_desc;
struct vnode * a_vp;
struct ucred * a_cred;
int a_waitfor;
struct thread *a_td;
} */ *ap;
{
/* return (nfs_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
return (0);
}
/* ARGSUSED */
static
int nwfs_print (ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct nwnode *np = VTONW(vp);
printf("\tnwfs node: name = '%s', fid = %d, pfid = %d\n",
np->n_name, np->n_fid.f_id, np->n_fid.f_parent);
return (0);
}
static int nwfs_pathconf (ap)
struct vop_pathconf_args /* {
struct vnode *vp;
int name;
register_t *retval;
} */ *ap;
{
int name=ap->a_name, error=0;
register_t *retval=ap->a_retval;
switch(name){
case _PC_LINK_MAX:
*retval=0;
break;
case _PC_NAME_MAX:
*retval=NCP_MAX_FILENAME; /* XXX from nwfsnode */
break;
case _PC_PATH_MAX:
*retval=NCP_MAXPATHLEN; /* XXX from nwfsnode */
break;
default:
error=EINVAL;
}
return(error);
}
static int nwfs_strategy (ap)
struct vop_strategy_args /* {
struct buf *a_bp
} */ *ap;
{
struct buf *bp=ap->a_bp;
struct ucred *cr;
struct thread *td;
int error = 0;
NCPVNDEBUG("\n");
if (bp->b_flags & B_ASYNC)
td = (struct thread *)0;
else
td = curthread; /* XXX */
if (bp->b_iocmd == BIO_READ)
cr = bp->b_rcred;
else
cr = bp->b_wcred;
/*
* If the op is asynchronous and an i/o daemon is waiting
* queue the request, wake it up and wait for completion
* otherwise just do it ourselves.
*/
if ((bp->b_flags & B_ASYNC) == 0 )
error = nwfs_doio(ap->a_vp, bp, cr, td);
return (error);
}
/*
* How to keep the brain busy ...
* Currently lookup routine can make two lookup for vnode. This can be
* avoided by reorg the code.
*/
int
nwfs_lookup(ap)
struct vop_lookup_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_dvp;
struct vnode **a_vpp;
struct componentname *a_cnp;
} */ *ap;
{
struct componentname *cnp = ap->a_cnp;
struct vnode *dvp = ap->a_dvp;
struct vnode **vpp = ap->a_vpp;
int flags = cnp->cn_flags;
struct vnode *vp;
struct nwmount *nmp;
struct mount *mp = dvp->v_mount;
struct nwnode *dnp, *npp;
struct nw_entry_info fattr, *fap;
ncpfid fid;
int nameiop=cnp->cn_nameiop, islastcn;
int error = 0, notfound;
struct thread *td = cnp->cn_thread;
char _name[cnp->cn_namelen+1];
bcopy(cnp->cn_nameptr, _name, cnp->cn_namelen);
_name[cnp->cn_namelen]=0;
if (dvp->v_type != VDIR)
return (ENOTDIR);
if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
printf("nwfs_lookup: invalid '..'\n");
return EIO;
}
NCPVNDEBUG("%d '%s' in '%s' id=d\n", nameiop, _name,
VTONW(dvp)->n_name/*, VTONW(dvp)->n_name*/);
islastcn = flags & ISLASTCN;
if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
return (EROFS);
if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)))
return (error);
nmp = VFSTONWFS(mp);
dnp = VTONW(dvp);
/*
printf("dvp %d:%d:%d\n", (int)mp, (int)dvp->v_vflag & VV_ROOT, (int)flags & ISDOTDOT);
*/
error = ncp_pathcheck(cnp->cn_nameptr, cnp->cn_namelen, &nmp->m.nls,
(nameiop == CREATE || nameiop == RENAME) && (nmp->m.nls.opt & NWHP_NOSTRICT) == 0);
if (error)
return ENOENT;
error = cache_lookup(dvp, vpp, cnp);
NCPVNDEBUG("cache_lookup returned %d\n", error);
if (error > 0)
return error;
if (error) { /* name was found */
struct vattr vattr;
vhold(*vpp);
vp = *vpp;
if (dvp == vp) { /* lookup on current */
vref(vp);
error = 0;
NCPVNDEBUG("cached '.'");
} else if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td); /* unlock parent */
error = vget(vp, LK_EXCLUSIVE, td);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
} else
error = vget(vp, LK_EXCLUSIVE, td);
if (!error) {
if (!VOP_GETATTR(vp, &vattr, cnp->cn_cred, td)
&& vattr.va_ctime.tv_sec == VTONW(vp)->n_ctime) {
if (nameiop != LOOKUP && islastcn)
cnp->cn_flags |= SAVENAME;
NCPVNDEBUG("use cached vnode");
vdrop(vp);
return (0);
}
cache_purge(vp);
if (vp != dvp)
vput(vp);
else
vrele(vp);
}
vdrop(vp);
*vpp = NULLVP;
}
/* not in cache, so ... */
error = 0;
*vpp = NULLVP;
fap = NULL;
if (flags & ISDOTDOT) {
if (NWCMPF(&dnp->n_parent, &nmp->n_rootent)) {
fid = nmp->n_rootent;
fap = NULL;
notfound = 0;
} else {
error = nwfs_lookupnp(nmp, dnp->n_parent, td, &npp);
if (error) {
return error;
}
fid = dnp->n_parent;
fap = &fattr;
/*np = *npp;*/
notfound = ncp_obtain_info(nmp, npp->n_dosfid,
0, NULL, fap, td, cnp->cn_cred);
}
} else {
fap = &fattr;
notfound = ncp_lookup(dvp, cnp->cn_namelen, cnp->cn_nameptr,
fap, td, cnp->cn_cred);
fid.f_id = fap->dirEntNum;
if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
fid.f_parent = dnp->n_fid.f_parent;
} else
fid.f_parent = dnp->n_fid.f_id;
NCPVNDEBUG("call to ncp_lookup returned=%d\n", notfound);
}
if (notfound && notfound < 0x80 )
return (notfound); /* hard error */
if (notfound) { /* entry not found */
/* Handle RENAME or CREATE case... */
if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
cnp->cn_flags |= SAVENAME;
return (EJUSTRETURN);
}
return ENOENT;
}/* else {
NCPVNDEBUG("Found entry %s with id=%d\n", fap->entryName, fap->dirEntNum);
}*/
/* handle DELETE case ... */
if (nameiop == DELETE && islastcn) { /* delete last component */
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread);
if (error) return (error);
if (NWCMPF(&dnp->n_fid, &fid)) { /* we found ourselfs */
VREF(dvp);
*vpp = dvp;
return 0;
}
error = nwfs_nget(mp, fid, fap, dvp, &vp);
if (error) return (error);
*vpp = vp;
cnp->cn_flags |= SAVENAME; /* I free it later */
return (0);
}
if (nameiop == RENAME && islastcn) {
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, cnp->cn_thread);
if (error) return (error);
if (NWCMPF(&dnp->n_fid, &fid)) return EISDIR;
error = nwfs_nget(mp, fid, fap, dvp, &vp);
if (error) return (error);
*vpp = vp;
cnp->cn_flags |= SAVENAME;
return (0);
}
if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td); /* race to get the inode */
error = nwfs_nget(mp, fid, NULL, NULL, &vp);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
if (error)
return (error);
*vpp = vp;
} else if (NWCMPF(&dnp->n_fid, &fid)) {
vref(dvp);
*vpp = dvp;
} else {
error = nwfs_nget(mp, fid, fap, dvp, &vp);
if (error) return (error);
*vpp = vp;
NCPVNDEBUG("lookup: getnewvp!\n");
}
if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
VTONW(*vpp)->n_ctime = VTONW(*vpp)->n_vattr.va_ctime.tv_sec;
cache_enter(dvp, *vpp, cnp);
}
return (0);
}
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