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freebsd-dev/sys/fs/nwfs/nwfs_vnops.c
Julian Elischer b40ce4165d KSE Milestone 2 
Note ALL MODULES MUST BE RECOMPILED
make the kernel aware that there are smaller units of scheduling than the
process. (but only allow one thread per process at this time).
This is functionally equivalent to teh previousl -current except
that there is a thread associated with each process.

Sorry john! (your next MFC will be a doosie!)

Reviewed by: peter@freebsd.org, dillon@freebsd.org

X-MFC after:    ha ha ha ha
2001-09-12 08:38:13 +00:00

1034 lines
26 KiB
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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 int nwfs_create(struct vop_create_args *);
static int nwfs_mknod(struct vop_mknod_args *);
static int nwfs_open(struct vop_open_args *);
static int nwfs_close(struct vop_close_args *);
static int nwfs_access(struct vop_access_args *);
static int nwfs_getattr(struct vop_getattr_args *);
static int nwfs_setattr(struct vop_setattr_args *);
static int nwfs_read(struct vop_read_args *);
static int nwfs_write(struct vop_write_args *);
static int nwfs_fsync(struct vop_fsync_args *);
static int nwfs_remove(struct vop_remove_args *);
static int nwfs_link(struct vop_link_args *);
static int nwfs_lookup(struct vop_lookup_args *);
static int nwfs_rename(struct vop_rename_args *);
static int nwfs_mkdir(struct vop_mkdir_args *);
static int nwfs_rmdir(struct vop_rmdir_args *);
static int nwfs_symlink(struct vop_symlink_args *);
static int nwfs_readdir(struct vop_readdir_args *);
static int nwfs_strategy(struct vop_strategy_args *);
static int nwfs_print(struct vop_print_args *);
static int nwfs_pathconf(struct vop_pathconf_args *ap);
/* Global vfs data structures for nwfs */
vop_t **nwfs_vnodeop_p;
static struct vnodeopv_entry_desc nwfs_vnodeop_entries[] = {
{ &vop_default_desc, (vop_t *) vop_defaultop },
{ &vop_access_desc, (vop_t *) nwfs_access },
{ &vop_open_desc, (vop_t *) nwfs_open },
{ &vop_close_desc, (vop_t *) nwfs_close },
{ &vop_create_desc, (vop_t *) nwfs_create },
{ &vop_fsync_desc, (vop_t *) nwfs_fsync },
{ &vop_getattr_desc, (vop_t *) nwfs_getattr },
{ &vop_getpages_desc, (vop_t *) nwfs_getpages },
{ &vop_putpages_desc, (vop_t *) nwfs_putpages },
{ &vop_ioctl_desc, (vop_t *) nwfs_ioctl },
{ &vop_inactive_desc, (vop_t *) nwfs_inactive },
{ &vop_islocked_desc, (vop_t *) vop_stdislocked },
{ &vop_link_desc, (vop_t *) nwfs_link },
{ &vop_lock_desc, (vop_t *) vop_stdlock },
{ &vop_lookup_desc, (vop_t *) nwfs_lookup },
{ &vop_mkdir_desc, (vop_t *) nwfs_mkdir },
{ &vop_mknod_desc, (vop_t *) nwfs_mknod },
{ &vop_pathconf_desc, (vop_t *) nwfs_pathconf },
{ &vop_print_desc, (vop_t *) nwfs_print },
{ &vop_read_desc, (vop_t *) nwfs_read },
{ &vop_readdir_desc, (vop_t *) nwfs_readdir },
{ &vop_reclaim_desc, (vop_t *) nwfs_reclaim },
{ &vop_remove_desc, (vop_t *) nwfs_remove },
{ &vop_rename_desc, (vop_t *) nwfs_rename },
{ &vop_rmdir_desc, (vop_t *) nwfs_rmdir },
{ &vop_setattr_desc, (vop_t *) nwfs_setattr },
{ &vop_strategy_desc, (vop_t *) nwfs_strategy },
{ &vop_symlink_desc, (vop_t *) nwfs_symlink },
{ &vop_unlock_desc, (vop_t *) vop_stdunlock },
{ &vop_write_desc, (vop_t *) nwfs_write },
{ NULL, NULL }
};
static struct vnodeopv_desc nwfs_vnodeop_opv_desc =
{ &nwfs_vnodeop_p, nwfs_vnodeop_entries };
VNODEOP_SET(nwfs_vnodeop_opv_desc);
/*
* nwfs_access vnode op
* for now just return ok
*/
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;
struct ucred *cred = ap->a_cred;
u_int mode = ap->a_mode;
struct nwmount *nmp = VTONWFS(vp);
int error = 0;
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;
}
}
if (cred->cr_uid == 0)
return 0;
if (cred->cr_uid != nmp->m.uid) {
mode >>= 3;
if (!groupmember(nmp->m.gid, cred))
mode >>= 3;
}
error = (((vp->v_type == VREG) ? nmp->m.file_mode : nmp->m.dir_mode) & mode) == mode ? 0 : EACCES;
return error;
}
/*
* 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, V_SAVE, ap->a_cred, ap->a_td, 1)) == 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, V_SAVE, ap->a_cred, ap->a_td, 1)) == 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, V_SAVE, ap->a_cred, ap->a_td, 1);
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_flag & VROOT) != 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 || vp->v_usecount != 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 && tvp->v_usecount > 1) {
error = EBUSY;
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;
}
if (fvp->v_type == VDIR) {
oldtype |= NW_TYPE_SUBDIR;
} else if (fvp->v_type == VREG) {
oldtype |= NW_TYPE_FILE;
} else
return EINVAL;
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:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
nwfs_attr_cacheremove(fdvp);
nwfs_attr_cacheremove(tdvp);
nwfs_attr_cacheremove(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("nwfs 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_PHYS)
panic("nwfs physio");
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(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 lockparent, wantparent, 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_flag & VROOT)) {
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);
lockparent = flags & LOCKPARENT;
wantparent = flags & (LOCKPARENT|WANTPARENT);
nmp = VFSTONWFS(mp);
dnp = VTONW(dvp);
/*
printf("dvp %d:%d:%d\n", (int)mp, (int)dvp->v_flag & VROOT, (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;
int vpid;
vp = *vpp;
vpid = vp->v_id;
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);
if (!error && lockparent && islastcn)
error = vn_lock(dvp, LK_EXCLUSIVE, td);
} else {
error = vget(vp, LK_EXCLUSIVE, td);
if (!lockparent || error || !islastcn)
VOP_UNLOCK(dvp, 0, td);
}
if (!error) {
if (vpid == vp->v_id) {
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");
return (0);
}
cache_purge(vp);
}
vput(vp);
if (lockparent && dvp != vp && islastcn)
VOP_UNLOCK(dvp, 0, td);
}
error = vn_lock(dvp, LK_EXCLUSIVE, td);
*vpp = NULLVP;
if (error)
return (error);
}
/* 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) && wantparent && islastcn) {
cnp->cn_flags |= SAVENAME;
if (!lockparent)
VOP_UNLOCK(dvp, 0, td);
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 */
if (!lockparent) VOP_UNLOCK(dvp, 0, td);
return (0);
}
if (nameiop == RENAME && islastcn && wantparent) {
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;
if (!lockparent)
VOP_UNLOCK(dvp, 0, td);
return (0);
}
if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td); /* race to get the inode */
error = nwfs_nget(mp, fid, NULL, NULL, &vp);
if (error) {
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
return (error);
}
if (lockparent && islastcn &&
(error = vn_lock(dvp, LK_EXCLUSIVE, td))) {
vput(vp);
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 (!lockparent || !islastcn)
VOP_UNLOCK(dvp, 0, td);
}
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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