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HardenedBSD/sys/fs/smbfs/smbfs_vnops.c
Warner Losh 95ee2897e9 sys: Remove $FreeBSD$: two-line .h pattern 
Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/
2023-08-16 11:54:11 -06:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 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.
*
* 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/namei.h>
#include <sys/kernel.h>
#include <sys/proc.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 <sys/limits.h>
#include <sys/lockf.h>
#include <sys/stat.h>
#include <vm/vm.h>
#include <vm/vm_extern.h>
#include <netsmb/smb.h>
#include <netsmb/smb_conn.h>
#include <netsmb/smb_subr.h>
#include <fs/smbfs/smbfs.h>
#include <fs/smbfs/smbfs_node.h>
#include <fs/smbfs/smbfs_subr.h>
/*
* Prototypes for SMBFS vnode operations
*/
static vop_create_t smbfs_create;
static vop_mknod_t smbfs_mknod;
static vop_open_t smbfs_open;
static vop_close_t smbfs_close;
static vop_access_t smbfs_access;
static vop_getattr_t smbfs_getattr;
static vop_setattr_t smbfs_setattr;
static vop_read_t smbfs_read;
static vop_write_t smbfs_write;
static vop_fsync_t smbfs_fsync;
static vop_remove_t smbfs_remove;
static vop_link_t smbfs_link;
static vop_lookup_t smbfs_lookup;
static vop_rename_t smbfs_rename;
static vop_mkdir_t smbfs_mkdir;
static vop_rmdir_t smbfs_rmdir;
static vop_symlink_t smbfs_symlink;
static vop_readdir_t smbfs_readdir;
static vop_strategy_t smbfs_strategy;
static vop_print_t smbfs_print;
static vop_pathconf_t smbfs_pathconf;
static vop_advlock_t smbfs_advlock;
static vop_getextattr_t smbfs_getextattr;
struct vop_vector smbfs_vnodeops = {
.vop_default = &default_vnodeops,
.vop_access = smbfs_access,
.vop_advlock = smbfs_advlock,
.vop_close = smbfs_close,
.vop_create = smbfs_create,
.vop_fsync = smbfs_fsync,
.vop_getattr = smbfs_getattr,
.vop_getextattr = smbfs_getextattr,
.vop_getpages = smbfs_getpages,
.vop_inactive = smbfs_inactive,
.vop_ioctl = smbfs_ioctl,
.vop_link = smbfs_link,
.vop_lookup = smbfs_lookup,
.vop_mkdir = smbfs_mkdir,
.vop_mknod = smbfs_mknod,
.vop_open = smbfs_open,
.vop_pathconf = smbfs_pathconf,
.vop_print = smbfs_print,
.vop_putpages = smbfs_putpages,
.vop_read = smbfs_read,
.vop_readdir = smbfs_readdir,
.vop_reclaim = smbfs_reclaim,
.vop_remove = smbfs_remove,
.vop_rename = smbfs_rename,
.vop_rmdir = smbfs_rmdir,
.vop_setattr = smbfs_setattr,
/* .vop_setextattr = smbfs_setextattr,*/
.vop_strategy = smbfs_strategy,
.vop_symlink = smbfs_symlink,
.vop_write = smbfs_write,
};
VFS_VOP_VECTOR_REGISTER(smbfs_vnodeops);
static int
smbfs_access(struct vop_access_args *ap)
{
struct vnode *vp = ap->a_vp;
accmode_t accmode = ap->a_accmode;
mode_t mpmode;
struct smbmount *smp = VTOSMBFS(vp);
SMBVDEBUG("\n");
if ((accmode & 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 ? smp->sm_file_mode : smp->sm_dir_mode;
return (vaccess(vp->v_type, mpmode, smp->sm_uid,
smp->sm_gid, ap->a_accmode, ap->a_cred));
}
/* ARGSUSED */
static int
smbfs_open(struct vop_open_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct smb_cred *scred;
struct vattr vattr;
int mode = ap->a_mode;
int error, accmode;
SMBVDEBUG("%s,%d\n", np->n_name, (np->n_flag & NOPEN) != 0);
if (vp->v_type != VREG && vp->v_type != VDIR) {
SMBFSERR("open eacces vtype=%d\n", vp->v_type);
return EACCES;
}
if (vp->v_type == VDIR) {
np->n_flag |= NOPEN;
return 0;
}
if (np->n_flag & NMODIFIED) {
if ((error = smbfs_vinvalbuf(vp, ap->a_td)) == EINTR)
return error;
smbfs_attr_cacheremove(vp);
error = VOP_GETATTR(vp, &vattr, ap->a_cred);
if (error)
return error;
np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
} else {
error = VOP_GETATTR(vp, &vattr, ap->a_cred);
if (error)
return error;
if (np->n_mtime.tv_sec != vattr.va_mtime.tv_sec) {
error = smbfs_vinvalbuf(vp, ap->a_td);
if (error == EINTR)
return error;
np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
}
}
if ((np->n_flag & NOPEN) != 0)
return 0;
/*
* Use DENYNONE to give unixy semantics of permitting
* everything not forbidden by permissions. Ie denial
* is up to server with clients/openers needing to use
* advisory locks for further control.
*/
accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
accmode = SMB_SM_DENYNONE|SMB_AM_OPENRW;
scred = smbfs_malloc_scred();
smb_makescred(scred, ap->a_td, ap->a_cred);
error = smbfs_smb_open(np, accmode, scred);
if (error) {
if (mode & FWRITE)
return EACCES;
else if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
accmode = SMB_SM_DENYNONE|SMB_AM_OPENREAD;
error = smbfs_smb_open(np, accmode, scred);
}
}
if (error == 0) {
np->n_flag |= NOPEN;
vnode_create_vobject(ap->a_vp, vattr.va_size, ap->a_td);
}
smbfs_attr_cacheremove(vp);
smbfs_free_scred(scred);
return error;
}
static int
smbfs_close(struct vop_close_args *ap)
{
struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;
struct smbnode *np = VTOSMB(vp);
struct smb_cred *scred;
if (vp->v_type == VDIR && (np->n_flag & NOPEN) != 0 &&
np->n_dirseq != NULL) {
scred = smbfs_malloc_scred();
smb_makescred(scred, td, ap->a_cred);
smbfs_findclose(np->n_dirseq, scred);
smbfs_free_scred(scred);
np->n_dirseq = NULL;
}
return 0;
}
/*
* smbfs_getattr call from vfs.
*/
static int
smbfs_getattr(struct vop_getattr_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct vattr *va=ap->a_vap;
struct smbfattr fattr;
struct smb_cred *scred;
u_quad_t oldsize;
int error;
SMBVDEBUG("%lx: '%s' %d\n", (long)vp, np->n_name, (vp->v_vflag & VV_ROOT) != 0);
error = smbfs_attr_cachelookup(vp, va);
if (!error)
return 0;
SMBVDEBUG("not in the cache\n");
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, ap->a_cred);
oldsize = np->n_size;
error = smbfs_smb_lookup(np, NULL, 0, &fattr, scred);
if (error) {
SMBVDEBUG("error %d\n", error);
smbfs_free_scred(scred);
return error;
}
smbfs_attr_cacheenter(vp, &fattr);
smbfs_attr_cachelookup(vp, va);
if (np->n_flag & NOPEN)
np->n_size = oldsize;
smbfs_free_scred(scred);
return 0;
}
static int
smbfs_setattr(struct vop_setattr_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct vattr *vap = ap->a_vap;
struct timespec *mtime, *atime;
struct smb_cred *scred;
struct smb_share *ssp = np->n_mount->sm_share;
struct smb_vc *vcp = SSTOVC(ssp);
struct thread *td = curthread;
u_quad_t tsize = 0;
int isreadonly, doclose, error = 0;
int old_n_dosattr;
SMBVDEBUG("\n");
isreadonly = (vp->v_mount->mnt_flag & MNT_RDONLY);
/*
* 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 || vap->va_flags != VNOVAL) &&
isreadonly)
return EROFS;
/*
* We only support setting four flags. Don't allow setting others.
*
* We map UF_READONLY to SMB_FA_RDONLY, unlike the MacOS X version
* of this code, which maps both UF_IMMUTABLE AND SF_IMMUTABLE to
* SMB_FA_RDONLY. The immutable flags have different semantics
* than readonly, which is the reason for the difference.
*/
if (vap->va_flags != VNOVAL) {
if (vap->va_flags & ~(UF_HIDDEN|UF_SYSTEM|UF_ARCHIVE|
UF_READONLY))
return EINVAL;
}
scred = smbfs_malloc_scred();
smb_makescred(scred, td, ap->a_cred);
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
error = EISDIR;
goto out;
case VREG:
break;
default:
error = EINVAL;
goto out;
}
if (isreadonly) {
error = EROFS;
goto out;
}
doclose = 0;
vnode_pager_setsize(vp, (u_long)vap->va_size);
tsize = np->n_size;
np->n_size = vap->va_size;
if ((np->n_flag & NOPEN) == 0) {
error = smbfs_smb_open(np,
SMB_SM_DENYNONE|SMB_AM_OPENRW,
scred);
if (error == 0)
doclose = 1;
}
if (error == 0)
error = smbfs_smb_setfsize(np,
(int64_t)vap->va_size, scred);
if (doclose)
smbfs_smb_close(ssp, np->n_fid, NULL, scred);
if (error) {
np->n_size = tsize;
vnode_pager_setsize(vp, (u_long)tsize);
goto out;
}
}
if ((vap->va_flags != VNOVAL) || (vap->va_mode != (mode_t)VNOVAL)) {
old_n_dosattr = np->n_dosattr;
if (vap->va_mode != (mode_t)VNOVAL) {
if (vap->va_mode & S_IWUSR)
np->n_dosattr &= ~SMB_FA_RDONLY;
else
np->n_dosattr |= SMB_FA_RDONLY;
}
if (vap->va_flags != VNOVAL) {
if (vap->va_flags & UF_HIDDEN)
np->n_dosattr |= SMB_FA_HIDDEN;
else
np->n_dosattr &= ~SMB_FA_HIDDEN;
if (vap->va_flags & UF_SYSTEM)
np->n_dosattr |= SMB_FA_SYSTEM;
else
np->n_dosattr &= ~SMB_FA_SYSTEM;
if (vap->va_flags & UF_ARCHIVE)
np->n_dosattr |= SMB_FA_ARCHIVE;
else
np->n_dosattr &= ~SMB_FA_ARCHIVE;
/*
* We only support setting the immutable / readonly
* bit for regular files. According to comments in
* the MacOS X version of this code, supporting the
* readonly bit on directories doesn't do the same
* thing in Windows as in Unix.
*/
if (vp->v_type == VREG) {
if (vap->va_flags & UF_READONLY)
np->n_dosattr |= SMB_FA_RDONLY;
else
np->n_dosattr &= ~SMB_FA_RDONLY;
}
}
if (np->n_dosattr != old_n_dosattr) {
error = smbfs_smb_setpattr(np, np->n_dosattr, NULL, scred);
if (error)
goto out;
}
}
mtime = atime = NULL;
if (vap->va_mtime.tv_sec != VNOVAL)
mtime = &vap->va_mtime;
if (vap->va_atime.tv_sec != VNOVAL)
atime = &vap->va_atime;
if (mtime != atime) {
if (vap->va_vaflags & VA_UTIMES_NULL) {
error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
if (error)
error = VOP_ACCESS(vp, VWRITE, ap->a_cred, td);
} else
error = VOP_ACCESS(vp, VADMIN, ap->a_cred, td);
#if 0
if (mtime == NULL)
mtime = &np->n_mtime;
if (atime == NULL)
atime = &np->n_atime;
#endif
/*
* If file is opened, then we can use handle based calls.
* If not, use path based ones.
*/
if ((np->n_flag & NOPEN) == 0) {
if (vcp->vc_flags & SMBV_WIN95) {
error = VOP_OPEN(vp, FWRITE, ap->a_cred, td,
NULL);
if (!error) {
/* error = smbfs_smb_setfattrNT(np, 0,
mtime, atime, scred);
VOP_GETATTR(vp, &vattr, ap->a_cred); */
if (mtime)
np->n_mtime = *mtime;
VOP_CLOSE(vp, FWRITE, ap->a_cred, td);
}
} else if ((vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS)) {
error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
/* error = smbfs_smb_setpattrNT(np, 0, mtime, atime, scred);*/
} else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN2_0) {
error = smbfs_smb_setptime2(np, mtime, atime, 0, scred);
} else {
error = smbfs_smb_setpattr(np, 0, mtime, scred);
}
} else {
if (vcp->vc_sopt.sv_caps & SMB_CAP_NT_SMBS) {
error = smbfs_smb_setfattrNT(np, 0, mtime, atime, scred);
} else if (SMB_DIALECT(vcp) >= SMB_DIALECT_LANMAN1_0) {
error = smbfs_smb_setftime(np, mtime, atime, scred);
} else {
/*
* I have no idea how to handle this for core
* level servers. The possible solution is to
* update mtime after file is closed.
*/
SMBERROR("can't update times on an opened file\n");
}
}
}
/*
* Invalidate attribute cache in case if server doesn't set
* required attributes.
*/
smbfs_attr_cacheremove(vp); /* invalidate cache */
VOP_GETATTR(vp, vap, ap->a_cred);
np->n_mtime.tv_sec = vap->va_mtime.tv_sec;
out:
smbfs_free_scred(scred);
return error;
}
/*
* smbfs_read call.
*/
static int
smbfs_read(struct vop_read_args *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
SMBVDEBUG("\n");
if (vp->v_type != VREG && vp->v_type != VDIR)
return EPERM;
return smbfs_readvnode(vp, uio, ap->a_cred);
}
static int
smbfs_write(struct vop_write_args *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
SMBVDEBUG("%d,ofs=%jd,sz=%zd\n",vp->v_type, (intmax_t)uio->uio_offset,
uio->uio_resid);
if (vp->v_type != VREG)
return (EPERM);
return smbfs_writevnode(vp, uio, ap->a_cred,ap->a_ioflag);
}
/*
* smbfs_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.
*/
static int
smbfs_create(struct vop_create_args *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 smbnode *dnp = VTOSMB(dvp);
struct vnode *vp;
struct vattr vattr;
struct smbfattr fattr;
struct smb_cred *scred;
char *name = cnp->cn_nameptr;
int nmlen = cnp->cn_namelen;
int error;
SMBVDEBUG("\n");
*vpp = NULL;
if (vap->va_type != VREG)
return EOPNOTSUPP;
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
return error;
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, cnp->cn_cred);
error = smbfs_smb_create(dnp, name, nmlen, scred);
if (error)
goto out;
error = smbfs_smb_lookup(dnp, name, nmlen, &fattr, scred);
if (error)
goto out;
error = smbfs_nget(VTOVFS(dvp), dvp, name, nmlen, &fattr, &vp);
if (error)
goto out;
*vpp = vp;
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, vp, cnp);
out:
smbfs_free_scred(scred);
return error;
}
static int
smbfs_remove(struct vop_remove_args *ap)
{
struct vnode *vp = ap->a_vp;
/* struct vnode *dvp = ap->a_dvp;*/
struct componentname *cnp = ap->a_cnp;
struct smbnode *np = VTOSMB(vp);
struct smb_cred *scred;
int error;
if (vp->v_type == VDIR || (np->n_flag & NOPEN) != 0 || vrefcnt(vp) != 1)
return EPERM;
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, cnp->cn_cred);
error = smbfs_smb_delete(np, scred);
if (error == 0)
np->n_flag |= NGONE;
cache_purge(vp);
smbfs_free_scred(scred);
return error;
}
/*
* smbfs_file rename call
*/
static int
smbfs_rename(struct vop_rename_args *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 smb_cred *scred;
#ifdef notnow
u_int16_t flags = 6;
#endif
int error=0;
scred = NULL;
/* 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;
}
#ifdef notnow
flags = 0x10; /* verify all writes */
#endif
if (fvp->v_type == VDIR) {
#ifdef notnow
flags |= 2;
#endif
} else if (fvp->v_type == VREG) {
#ifdef notnow
flags |= 1;
#endif
} else {
return EINVAL;
}
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, tcnp->cn_cred);
/*
* It seems that Samba doesn't implement SMB_COM_MOVE call...
*/
#ifdef notnow
if (SMB_DIALECT(SSTOCN(smp->sm_share)) >= SMB_DIALECT_LANMAN1_0) {
error = smbfs_smb_move(VTOSMB(fvp), VTOSMB(tdvp),
tcnp->cn_nameptr, tcnp->cn_namelen, flags, scred);
} else
#endif
{
/*
* We have to do the work atomicaly
*/
if (tvp && tvp != fvp) {
error = smbfs_smb_delete(VTOSMB(tvp), scred);
if (error)
goto out_cacherem;
VTOSMB(fvp)->n_flag |= NGONE;
}
error = smbfs_smb_rename(VTOSMB(fvp), VTOSMB(tdvp),
tcnp->cn_nameptr, tcnp->cn_namelen, scred);
}
if (fvp->v_type == VDIR) {
if (tvp != NULL && tvp->v_type == VDIR)
cache_purge(tdvp);
cache_purge(fdvp);
}
out_cacherem:
smbfs_attr_cacheremove(fdvp);
smbfs_attr_cacheremove(tdvp);
out:
smbfs_free_scred(scred);
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
#ifdef possible_mistake
vgone(fvp);
if (tvp)
vgone(tvp);
#endif
return error;
}
/*
* somtime it will come true...
*/
static int
smbfs_link(struct vop_link_args *ap)
{
return EOPNOTSUPP;
}
/*
* smbfs_symlink link create call.
* Sometime it will be functional...
*/
static int
smbfs_symlink(struct vop_symlink_args *ap)
{
return EOPNOTSUPP;
}
static int
smbfs_mknod(struct vop_mknod_args *ap)
{
return EOPNOTSUPP;
}
static int
smbfs_mkdir(struct vop_mkdir_args *ap)
{
struct vnode *dvp = ap->a_dvp;
/* struct vattr *vap = ap->a_vap;*/
struct vnode *vp;
struct componentname *cnp = ap->a_cnp;
struct smbnode *dnp = VTOSMB(dvp);
struct vattr vattr;
struct smb_cred *scred;
struct smbfattr fattr;
char *name = cnp->cn_nameptr;
int len = cnp->cn_namelen;
int error;
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred))) {
return error;
}
if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.'))))
return EEXIST;
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, cnp->cn_cred);
error = smbfs_smb_mkdir(dnp, name, len, scred);
if (error)
goto out;
error = smbfs_smb_lookup(dnp, name, len, &fattr, scred);
if (error)
goto out;
error = smbfs_nget(VTOVFS(dvp), dvp, name, len, &fattr, &vp);
if (error)
goto out;
*ap->a_vpp = vp;
out:
smbfs_free_scred(scred);
return error;
}
/*
* smbfs_remove directory call
*/
static int
smbfs_rmdir(struct vop_rmdir_args *ap)
{
struct vnode *vp = ap->a_vp;
struct vnode *dvp = ap->a_dvp;
struct componentname *cnp = ap->a_cnp;
/* struct smbmount *smp = VTOSMBFS(vp);*/
struct smbnode *dnp = VTOSMB(dvp);
struct smbnode *np = VTOSMB(vp);
struct smb_cred *scred;
int error;
if (dvp == vp)
return EINVAL;
scred = smbfs_malloc_scred();
smb_makescred(scred, curthread, cnp->cn_cred);
error = smbfs_smb_rmdir(np, scred);
if (error == 0)
np->n_flag |= NGONE;
dnp->n_flag |= NMODIFIED;
smbfs_attr_cacheremove(dvp);
/* cache_purge(dvp);*/
cache_purge(vp);
smbfs_free_scred(scred);
return error;
}
/*
* smbfs_readdir call
*/
static int
smbfs_readdir(struct vop_readdir_args *ap)
{
struct vnode *vp = ap->a_vp;
struct uio *uio = ap->a_uio;
int error;
if (vp->v_type != VDIR)
return (EPERM);
#ifdef notnow
if (ap->a_ncookies) {
printf("smbfs_readdir: no support for cookies now...");
return (EOPNOTSUPP);
}
#endif
error = smbfs_readvnode(vp, uio, ap->a_cred);
return error;
}
/* ARGSUSED */
static int
smbfs_fsync(struct vop_fsync_args *ap)
{
/* return (smb_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
return (0);
}
static
int smbfs_print(struct vop_print_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
if (np == NULL) {
printf("no smbnode data\n");
return (0);
}
printf("\tname = %s, parent = %p, open = %d\n", np->n_name,
np->n_parent ? np->n_parent : NULL, (np->n_flag & NOPEN) != 0);
return (0);
}
static int
smbfs_pathconf(struct vop_pathconf_args *ap)
{
struct smbmount *smp = VFSTOSMBFS(VTOVFS(ap->a_vp));
struct smb_vc *vcp = SSTOVC(smp->sm_share);
long *retval = ap->a_retval;
int error = 0;
switch (ap->a_name) {
case _PC_FILESIZEBITS:
if (vcp->vc_sopt.sv_caps & (SMB_CAP_LARGE_READX |
SMB_CAP_LARGE_WRITEX))
*retval = 64;
else
*retval = 32;
break;
case _PC_NAME_MAX:
*retval = (vcp->vc_hflags2 & SMB_FLAGS2_KNOWS_LONG_NAMES) ? 255 : 12;
break;
case _PC_PATH_MAX:
*retval = 800; /* XXX: a correct one ? */
break;
case _PC_NO_TRUNC:
*retval = 1;
break;
default:
error = vop_stdpathconf(ap);
}
return error;
}
static int
smbfs_strategy(struct vop_strategy_args *ap)
{
struct buf *bp=ap->a_bp;
struct ucred *cr;
struct thread *td;
SMBVDEBUG("\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 ((bp->b_flags & B_ASYNC) == 0 )
(void)smbfs_doio(ap->a_vp, bp, cr, td);
return (0);
}
int
smbfs_ioctl(struct vop_ioctl_args *ap)
{
return ENOTTY;
}
static char smbfs_atl[] = "rhsvda";
static int
smbfs_getextattr(struct vop_getextattr_args *ap)
/* {
IN struct vnode *a_vp;
IN char *a_name;
INOUT struct uio *a_uio;
IN struct ucred *a_cred;
IN struct thread *a_td;
};
*/
{
struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;
struct ucred *cred = ap->a_cred;
struct uio *uio = ap->a_uio;
const char *name = ap->a_name;
struct smbnode *np = VTOSMB(vp);
struct vattr vattr;
char buf[10];
int i, attr, error;
error = VOP_ACCESS(vp, VREAD, cred, td);
if (error)
return error;
error = VOP_GETATTR(vp, &vattr, cred);
if (error)
return error;
if (strcmp(name, "dosattr") == 0) {
attr = np->n_dosattr;
for (i = 0; i < 6; i++, attr >>= 1)
buf[i] = (attr & 1) ? smbfs_atl[i] : '-';
buf[i] = 0;
error = uiomove(buf, i, uio);
} else
error = EINVAL;
return error;
}
/*
* Since we expected to support F_GETLK (and SMB protocol has no such function),
* it is necessary to use lf_advlock(). It would be nice if this function had
* a callback mechanism because it will help to improve a level of consistency.
*/
int
smbfs_advlock(struct vop_advlock_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct flock *fl = ap->a_fl;
caddr_t id = (caddr_t)1 /* ap->a_id */;
/* int flags = ap->a_flags;*/
struct thread *td = curthread;
struct smb_cred *scred;
u_quad_t size;
off_t start, end, oadd;
int error, lkop;
if (vp->v_type == VDIR) {
/*
* SMB protocol have no support for directory locking.
* Although locks can be processed on local machine, I don't
* think that this is a good idea, because some programs
* can work wrong assuming directory is locked. So, we just
* return 'operation not supported
*/
return EOPNOTSUPP;
}
size = np->n_size;
switch (fl->l_whence) {
case SEEK_SET:
case SEEK_CUR:
start = fl->l_start;
break;
case SEEK_END:
if (size > OFF_MAX ||
(fl->l_start > 0 && size > OFF_MAX - fl->l_start))
return EOVERFLOW;
start = size + fl->l_start;
break;
default:
return EINVAL;
}
if (start < 0)
return EINVAL;
if (fl->l_len < 0) {
if (start == 0)
return EINVAL;
end = start - 1;
start += fl->l_len;
if (start < 0)
return EINVAL;
} else if (fl->l_len == 0)
end = -1;
else {
oadd = fl->l_len - 1;
if (oadd > OFF_MAX - start)
return EOVERFLOW;
end = start + oadd;
}
scred = smbfs_malloc_scred();
smb_makescred(scred, td, td->td_ucred);
switch (ap->a_op) {
case F_SETLK:
switch (fl->l_type) {
case F_WRLCK:
lkop = SMB_LOCK_EXCL;
break;
case F_RDLCK:
lkop = SMB_LOCK_SHARED;
break;
case F_UNLCK:
lkop = SMB_LOCK_RELEASE;
break;
default:
smbfs_free_scred(scred);
return EINVAL;
}
error = lf_advlock(ap, &vp->v_lockf, size);
if (error)
break;
lkop = SMB_LOCK_EXCL;
error = smbfs_smb_lock(np, lkop, id, start, end, scred);
if (error) {
int oldtype = fl->l_type;
fl->l_type = F_UNLCK;
ap->a_op = F_UNLCK;
lf_advlock(ap, &vp->v_lockf, size);
fl->l_type = oldtype;
}
break;
case F_UNLCK:
lf_advlock(ap, &vp->v_lockf, size);
error = smbfs_smb_lock(np, SMB_LOCK_RELEASE, id, start, end, scred);
break;
case F_GETLK:
error = lf_advlock(ap, &vp->v_lockf, size);
break;
default:
smbfs_free_scred(scred);
return EINVAL;
}
smbfs_free_scred(scred);
return error;
}
static int
smbfs_pathcheck(struct smbmount *smp, const char *name, int nmlen, int nameiop)
{
static const char *badchars = "*/:<>?";
static const char *badchars83 = " +|,[]=;";
const char *cp;
int i, error;
/*
* Backslash characters, being a path delimiter, are prohibited
* within a path component even for LOOKUP operations.
*/
if (strchr(name, '\\') != NULL)
return ENOENT;
if (nameiop == LOOKUP)
return 0;
error = ENOENT;
if (SMB_DIALECT(SSTOVC(smp->sm_share)) < SMB_DIALECT_LANMAN2_0) {
/*
* Name should conform 8.3 format
*/
if (nmlen > 12)
return ENAMETOOLONG;
cp = strchr(name, '.');
if (cp == NULL)
return error;
if (cp == name || (cp - name) > 8)
return error;
cp = strchr(cp + 1, '.');
if (cp != NULL)
return error;
for (cp = name, i = 0; i < nmlen; i++, cp++)
if (strchr(badchars83, *cp) != NULL)
return error;
}
for (cp = name, i = 0; i < nmlen; i++, cp++)
if (strchr(badchars, *cp) != NULL)
return error;
return 0;
}
/*
* Things go even weird without fixed inode numbers...
*/
int
smbfs_lookup(struct vop_lookup_args *ap)
{
struct componentname *cnp = ap->a_cnp;
struct thread *td = curthread;
struct vnode *dvp = ap->a_dvp;
struct vnode **vpp = ap->a_vpp;
struct vnode *vp;
struct smbmount *smp;
struct mount *mp = dvp->v_mount;
struct smbnode *dnp;
struct smbfattr fattr, *fap;
struct smb_cred *scred;
char *name = cnp->cn_nameptr;
int flags = cnp->cn_flags;
int nameiop = cnp->cn_nameiop;
int nmlen = cnp->cn_namelen;
int error, islastcn, isdot;
int killit;
SMBVDEBUG("\n");
if (dvp->v_type != VDIR)
return ENOTDIR;
if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
SMBFSERR("invalid '..'\n");
return EIO;
}
islastcn = flags & ISLASTCN;
if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
return EROFS;
error = vn_dir_check_exec(dvp, cnp);
if (error != 0)
return error;
smp = VFSTOSMBFS(mp);
dnp = VTOSMB(dvp);
isdot = (nmlen == 1 && name[0] == '.');
error = smbfs_pathcheck(smp, cnp->cn_nameptr, cnp->cn_namelen, nameiop);
if (error)
return ENOENT;
error = cache_lookup(dvp, vpp, cnp, NULL, NULL);
SMBVDEBUG("cache_lookup returned %d\n", error);
if (error > 0)
return error;
if (error) { /* name was found */
struct vattr vattr;
killit = 0;
vp = *vpp;
error = VOP_GETATTR(vp, &vattr, cnp->cn_cred);
/*
* If the file type on the server is inconsistent
* with what it was when we created the vnode,
* kill the bogus vnode now and fall through to
* the code below to create a new one with the
* right type.
*/
if (error == 0 &&
((vp->v_type == VDIR &&
(VTOSMB(vp)->n_dosattr & SMB_FA_DIR) == 0) ||
(vp->v_type == VREG &&
(VTOSMB(vp)->n_dosattr & SMB_FA_DIR) != 0)))
killit = 1;
else if (error == 0
/* && vattr.va_ctime.tv_sec == VTOSMB(vp)->n_ctime*/) {
SMBVDEBUG("use cached vnode\n");
return (0);
}
cache_purge(vp);
/*
* XXX This is not quite right, if '.' is
* inconsistent, we really need to start the lookup
* all over again. Hopefully there is some other
* guarantee that prevents this case from happening.
*/
if (killit && vp != dvp)
vgone(vp);
if (vp != dvp)
vput(vp);
else
vrele(vp);
*vpp = NULLVP;
}
/*
* entry is not in the cache or has been expired
*/
error = 0;
*vpp = NULLVP;
scred = smbfs_malloc_scred();
smb_makescred(scred, td, cnp->cn_cred);
fap = &fattr;
if (flags & ISDOTDOT) {
/*
* In the DOTDOT case, don't go over-the-wire
* in order to request attributes. We already
* know it's a directory and subsequent call to
* smbfs_getattr() will restore consistency.
*
*/
SMBVDEBUG("smbfs_smb_lookup: dotdot\n");
} else if (isdot) {
error = smbfs_smb_lookup(dnp, NULL, 0, fap, scred);
SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
}
else {
error = smbfs_smb_lookup(dnp, name, nmlen, fap, scred);
SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
}
if (error && error != ENOENT)
goto out;
if (error) { /* entry not found */
/*
* Handle RENAME or CREATE case...
*/
if ((nameiop == CREATE || nameiop == RENAME) && islastcn) {
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
if (error)
goto out;
error = EJUSTRETURN;
goto out;
}
error = ENOENT;
goto out;
}/* else {
SMBVDEBUG("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, td);
if (error)
goto out;
if (isdot) {
VREF(dvp);
*vpp = dvp;
goto out;
}
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
goto out;
*vpp = vp;
goto out;
}
if (nameiop == RENAME && islastcn) {
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
if (error)
goto out;
if (isdot) {
error = EISDIR;
goto out;
}
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
goto out;
*vpp = vp;
goto out;
}
if (flags & ISDOTDOT) {
mp = dvp->v_mount;
error = vfs_busy(mp, MBF_NOWAIT);
if (error != 0) {
vfs_ref(mp);
VOP_UNLOCK(dvp);
error = vfs_busy(mp, 0);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
vfs_rel(mp);
if (error) {
error = ENOENT;
goto out;
}
if (VN_IS_DOOMED(dvp)) {
vfs_unbusy(mp);
error = ENOENT;
goto out;
}
}
VOP_UNLOCK(dvp);
error = smbfs_nget(mp, dvp, name, nmlen, NULL, &vp);
vfs_unbusy(mp);
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
if (VN_IS_DOOMED(dvp)) {
if (error == 0)
vput(vp);
error = ENOENT;
}
if (error)
goto out;
*vpp = vp;
} else if (isdot) {
vref(dvp);
*vpp = dvp;
} else {
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
goto out;
*vpp = vp;
SMBVDEBUG("lookup: getnewvp!\n");
}
if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
/* VTOSMB(*vpp)->n_ctime = VTOSMB(*vpp)->n_vattr.va_ctime.tv_sec;*/
cache_enter(dvp, *vpp, cnp);
}
out:
smbfs_free_scred(scred);
return (error);
}
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