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02b8bc8062
freebsd-dev/sys/fs/smbfs/smbfs_vnops.c
Jeff Roberson e6e370a7fe - Replace v_flag with v_iflag and v_vflag 
- v_vflag is protected by the vnode lock and is used when synchronization
   with VOP calls is needed.
 - v_iflag is protected by interlock and is used for dealing with vnode
   management issues.  These flags include X/O LOCK, FREE, DOOMED, etc.
 - All accesses to v_iflag and v_vflag have either been locked or marked with
   mp_fixme's.
 - Many ASSERT_VOP_LOCKED calls have been added where the locking was not
   clear.
 - Many functions in vfs_subr.c were restructured to provide for stronger
   locking.

Idea stolen from:	BSD/OS
2002-08-04 10:29:36 +00:00

1336 lines
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/*
* 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.
* 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/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/lockf.h>
#include <machine/limits.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 int smbfs_create(struct vop_create_args *);
static int smbfs_mknod(struct vop_mknod_args *);
static int smbfs_open(struct vop_open_args *);
static int smbfs_close(struct vop_close_args *);
static int smbfs_access(struct vop_access_args *);
static int smbfs_getattr(struct vop_getattr_args *);
static int smbfs_setattr(struct vop_setattr_args *);
static int smbfs_read(struct vop_read_args *);
static int smbfs_write(struct vop_write_args *);
static int smbfs_fsync(struct vop_fsync_args *);
static int smbfs_remove(struct vop_remove_args *);
static int smbfs_link(struct vop_link_args *);
static int smbfs_lookup(struct vop_lookup_args *);
static int smbfs_rename(struct vop_rename_args *);
static int smbfs_mkdir(struct vop_mkdir_args *);
static int smbfs_rmdir(struct vop_rmdir_args *);
static int smbfs_symlink(struct vop_symlink_args *);
static int smbfs_readdir(struct vop_readdir_args *);
static int smbfs_strategy(struct vop_strategy_args *);
static int smbfs_print(struct vop_print_args *);
static int smbfs_pathconf(struct vop_pathconf_args *ap);
static int smbfs_advlock(struct vop_advlock_args *);
#ifndef FB_RELENG3
static int smbfs_getextattr(struct vop_getextattr_args *ap);
#endif
vop_t **smbfs_vnodeop_p;
static struct vnodeopv_entry_desc smbfs_vnodeop_entries[] = {
{ &vop_default_desc, (vop_t *) vop_defaultop },
{ &vop_access_desc, (vop_t *) smbfs_access },
{ &vop_advlock_desc, (vop_t *) smbfs_advlock },
{ &vop_close_desc, (vop_t *) smbfs_close },
{ &vop_create_desc, (vop_t *) smbfs_create },
{ &vop_fsync_desc, (vop_t *) smbfs_fsync },
{ &vop_getattr_desc, (vop_t *) smbfs_getattr },
{ &vop_getpages_desc, (vop_t *) smbfs_getpages },
{ &vop_inactive_desc, (vop_t *) smbfs_inactive },
{ &vop_ioctl_desc, (vop_t *) smbfs_ioctl },
{ &vop_islocked_desc, (vop_t *) vop_stdislocked },
{ &vop_link_desc, (vop_t *) smbfs_link },
{ &vop_lock_desc, (vop_t *) vop_stdlock },
{ &vop_lookup_desc, (vop_t *) smbfs_lookup },
{ &vop_mkdir_desc, (vop_t *) smbfs_mkdir },
{ &vop_mknod_desc, (vop_t *) smbfs_mknod },
{ &vop_open_desc, (vop_t *) smbfs_open },
{ &vop_pathconf_desc, (vop_t *) smbfs_pathconf },
{ &vop_print_desc, (vop_t *) smbfs_print },
{ &vop_putpages_desc, (vop_t *) smbfs_putpages },
{ &vop_read_desc, (vop_t *) smbfs_read },
{ &vop_readdir_desc, (vop_t *) smbfs_readdir },
{ &vop_reclaim_desc, (vop_t *) smbfs_reclaim },
{ &vop_remove_desc, (vop_t *) smbfs_remove },
{ &vop_rename_desc, (vop_t *) smbfs_rename },
{ &vop_rmdir_desc, (vop_t *) smbfs_rmdir },
{ &vop_setattr_desc, (vop_t *) smbfs_setattr },
{ &vop_strategy_desc, (vop_t *) smbfs_strategy },
{ &vop_symlink_desc, (vop_t *) smbfs_symlink },
{ &vop_unlock_desc, (vop_t *) vop_stdunlock },
{ &vop_write_desc, (vop_t *) smbfs_write },
#ifndef FB_RELENG3
{ &vop_getextattr_desc, (vop_t *) smbfs_getextattr },
/* { &vop_setextattr_desc, (vop_t *) smbfs_setextattr },*/
#endif
{ NULL, NULL }
};
static struct vnodeopv_desc smbfs_vnodeop_opv_desc =
{ &smbfs_vnodeop_p, smbfs_vnodeop_entries };
VNODEOP_SET(smbfs_vnodeop_opv_desc);
static int
smbfs_access(ap)
struct vop_access_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct ucred *cred = ap->a_cred;
u_int mode = ap->a_mode;
struct smbmount *smp = VTOSMBFS(vp);
int error = 0;
SMBVDEBUG("\n");
if ((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 != smp->sm_args.uid) {
mode >>= 3;
if (!groupmember(smp->sm_args.gid, cred))
mode >>= 3;
}
error = (((vp->v_type == VREG) ? smp->sm_args.file_mode : smp->sm_args.dir_mode) & mode) == mode ? 0 : EACCES;
return error;
}
/* ARGSUSED */
static int
smbfs_open(ap)
struct vop_open_args /* {
struct vnode *a_vp;
int a_mode;
struct ucred *a_cred;
struct thread *a_td;
} */ *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_opencount);
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_opencount++;
return 0;
}
if (np->n_flag & NMODIFIED) {
if ((error = smbfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_td, 1)) == EINTR)
return error;
smbfs_attr_cacheremove(vp);
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);
if (error)
return error;
np->n_mtime.tv_sec = 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.tv_sec != vattr.va_mtime.tv_sec) {
error = smbfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_td, 1);
if (error == EINTR)
return error;
np->n_mtime.tv_sec = vattr.va_mtime.tv_sec;
}
}
if (np->n_opencount) {
np->n_opencount++;
return 0;
}
accmode = SMB_AM_OPENREAD;
if ((vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
accmode = SMB_AM_OPENRW;
smb_makescred(&scred, ap->a_td, ap->a_cred);
error = smbfs_smb_open(np, accmode, &scred);
if (error) {
if (mode & FWRITE)
return EACCES;
accmode = SMB_AM_OPENREAD;
error = smbfs_smb_open(np, accmode, &scred);
}
if (!error) {
np->n_opencount++;
}
smbfs_attr_cacheremove(vp);
return error;
}
static int
smbfs_closel(struct vop_close_args *ap)
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
struct thread *td = ap->a_td;
struct smb_cred scred;
struct vattr vattr;
int error;
SMBVDEBUG("name=%s, pid=%d, c=%d\n",np->n_name, td->td_pid, np->n_opencount);
smb_makescred(&scred, td, ap->a_cred);
if (np->n_opencount == 0) {
if (vp->v_type != VDIR)
SMBERROR("Negative opencount\n");
return 0;
}
np->n_opencount--;
if (vp->v_type == VDIR) {
if (np->n_opencount)
return 0;
if (np->n_dirseq) {
smbfs_findclose(np->n_dirseq, &scred);
np->n_dirseq = NULL;
}
error = 0;
} else {
error = smbfs_vinvalbuf(vp, V_SAVE, ap->a_cred, td, 1);
if (np->n_opencount)
return error;
VOP_GETATTR(vp, &vattr, ap->a_cred, td);
error = smbfs_smb_close(np->n_mount->sm_share, np->n_fid,
&np->n_mtime, &scred);
}
smbfs_attr_cacheremove(vp);
return error;
}
/*
* XXX: VOP_CLOSE() usually called without lock held which is suck. Here we
* do some heruistic to determine if vnode should be locked.
*/
static int
smbfs_close(ap)
struct vop_close_args /* {
struct vnodeop_desc *a_desc;
struct vnode *a_vp;
int a_fflag;
struct ucred *a_cred;
struct thread *a_td;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct thread *td = ap->a_td;
int error, dolock;
VI_LOCK(vp);
dolock = (vp->v_iflag & VI_XLOCK) == 0;
if (dolock)
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY | LK_INTERLOCK, td);
else
VI_UNLOCK(vp);
error = smbfs_closel(ap);
if (dolock)
VOP_UNLOCK(vp, 0, td);
return error;
}
/*
* smbfs_getattr call from vfs.
*/
static int
smbfs_getattr(ap)
struct vop_getattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *a_td;
} */ *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_int32_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");
smb_makescred(&scred, ap->a_td, ap->a_cred);
oldsize = np->n_size;
error = smbfs_smb_lookup(np, NULL, 0, &fattr, &scred);
if (error) {
SMBVDEBUG("error %d\n", error);
return error;
}
smbfs_attr_cacheenter(vp, &fattr);
smbfs_attr_cachelookup(vp, va);
if (np->n_opencount)
np->n_size = oldsize;
return 0;
}
static int
smbfs_setattr(ap)
struct vop_setattr_args /* {
struct vnode *a_vp;
struct vattr *a_vap;
struct ucred *a_cred;
struct thread *a_td;
} */ *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);
u_quad_t tsize = 0;
int isreadonly, doclose, error = 0;
SMBVDEBUG("\n");
if (vap->va_flags != VNOVAL)
return EOPNOTSUPP;
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) && isreadonly)
return EROFS;
smb_makescred(&scred, ap->a_td, ap->a_cred);
if (vap->va_size != VNOVAL) {
switch (vp->v_type) {
case VDIR:
return EISDIR;
case VREG:
break;
default:
return EINVAL;
};
if (isreadonly)
return EROFS;
doclose = 0;
vnode_pager_setsize(vp, (u_long)vap->va_size);
tsize = np->n_size;
np->n_size = vap->va_size;
if (np->n_opencount == 0) {
error = smbfs_smb_open(np, SMB_AM_OPENRW, &scred);
if (error == 0)
doclose = 1;
}
if (error == 0)
error = smbfs_smb_setfsize(np, 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);
return error;
}
}
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 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_opencount == 0) {
if (vcp->vc_flags & SMBV_WIN95) {
error = VOP_OPEN(vp, FWRITE, ap->a_cred, ap->a_td);
if (!error) {
/* error = smbfs_smb_setfattrNT(np, 0, mtime, atime, &scred);
VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_td);*/
if (mtime)
np->n_mtime = *mtime;
VOP_CLOSE(vp, FWRITE, ap->a_cred, ap->a_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, ap->a_td);
np->n_mtime.tv_sec = vap->va_mtime.tv_sec;
return error;
}
/*
* smbfs_read call.
*/
static int
smbfs_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;
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(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;
SMBVDEBUG("%d,ofs=%d,sz=%d\n",vp->v_type, (int)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, or
* only if the SAVESTART bit in cn_flags is clear on success.
*/
static int
smbfs_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 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, cnp->cn_thread)))
return error;
smb_makescred(&scred, cnp->cn_thread, cnp->cn_cred);
error = smbfs_smb_create(dnp, name, nmlen, &scred);
if (error)
return error;
error = smbfs_smb_lookup(dnp, name, nmlen, &fattr, &scred);
if (error)
return error;
error = smbfs_nget(VTOVFS(dvp), dvp, name, nmlen, &fattr, &vp);
if (error)
return error;
*vpp = vp;
if (cnp->cn_flags & MAKEENTRY)
cache_enter(dvp, vp, cnp);
return error;
}
static int
smbfs_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 smbnode *np = VTOSMB(vp);
struct smb_cred scred;
int error;
if (vp->v_type == VDIR || np->n_opencount || vp->v_usecount != 1)
return EPERM;
smb_makescred(&scred, cnp->cn_thread, cnp->cn_cred);
error = smbfs_smb_delete(np, &scred);
cache_purge(vp);
return error;
}
/*
* smbfs_file rename call
*/
static int
smbfs_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 smb_cred scred;
u_int16_t flags = 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;
}
flags = 0x10; /* verify all writes */
if (fvp->v_type == VDIR) {
flags |= 2;
} else if (fvp->v_type == VREG) {
flags |= 1;
} else
return EINVAL;
smb_makescred(&scred, tcnp->cn_thread, 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;
}
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:
if (tdvp == tvp)
vrele(tdvp);
else
vput(tdvp);
if (tvp)
vput(tvp);
vrele(fdvp);
vrele(fvp);
smbfs_attr_cacheremove(fdvp);
smbfs_attr_cacheremove(tdvp);
#ifdef possible_mistake
vgone(fvp);
if (tvp)
vgone(tvp);
#endif
return error;
}
/*
* somtime it will come true...
*/
static int
smbfs_link(ap)
struct vop_link_args /* {
struct vnode *a_tdvp;
struct vnode *a_vp;
struct componentname *a_cnp;
} */ *ap;
{
return EOPNOTSUPP;
}
/*
* smbfs_symlink link create call.
* Sometime it will be functional...
*/
static int
smbfs_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
smbfs_mknod(ap)
struct vop_mknod_args /* {
} */ *ap;
{
return EOPNOTSUPP;
}
static int
smbfs_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 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, cnp->cn_thread))) {
return error;
}
if ((name[0] == '.') && ((len == 1) || ((len == 2) && (name[1] == '.'))))
return EEXIST;
smb_makescred(&scred, cnp->cn_thread, cnp->cn_cred);
error = smbfs_smb_mkdir(dnp, name, len, &scred);
if (error)
return error;
error = smbfs_smb_lookup(dnp, name, len, &fattr, &scred);
if (error)
return error;
error = smbfs_nget(VTOVFS(dvp), dvp, name, len, &fattr, &vp);
if (error)
return error;
*ap->a_vpp = vp;
return 0;
}
/*
* smbfs_remove directory call
*/
static int
smbfs_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 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;
smb_makescred(&scred, cnp->cn_thread, cnp->cn_cred);
error = smbfs_smb_rmdir(np, &scred);
dnp->n_flag |= NMODIFIED;
smbfs_attr_cacheremove(dvp);
/* cache_purge(dvp);*/
cache_purge(vp);
return error;
}
/*
* smbfs_readdir call
*/
static int
smbfs_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);
#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(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 (smb_flush(ap->a_vp, ap->a_cred, ap->a_waitfor, ap->a_td, 1));*/
return (0);
}
static
int smbfs_print (ap)
struct vop_print_args /* {
struct vnode *a_vp;
} */ *ap;
{
struct vnode *vp = ap->a_vp;
struct smbnode *np = VTOSMB(vp);
if (np == NULL) {
printf("no smbnode data\n");
return (0);
}
printf("tag VT_SMBFS, name = %s, parent = %p, opencount = %d",
np->n_name, np->n_parent ? SMBTOV(np->n_parent) : NULL,
np->n_opencount);
lockmgr_printinfo(&vp->v_lock);
printf("\n");
return (0);
}
static int
smbfs_pathconf (ap)
struct vop_pathconf_args /* {
struct vnode *vp;
int name;
register_t *retval;
} */ *ap;
{
struct smbmount *smp = VFSTOSMBFS(VTOVFS(ap->a_vp));
struct smb_vc *vcp = SSTOVC(smp->sm_share);
register_t *retval = ap->a_retval;
int error = 0;
switch (ap->a_name) {
case _PC_LINK_MAX:
*retval = 0;
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;
default:
error = EINVAL;
}
return error;
}
static int
smbfs_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;
SMBVDEBUG("\n");
if (bp->b_flags & B_PHYS)
panic("smbfs 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 ((bp->b_flags & B_ASYNC) == 0 )
error = smbfs_doio(bp, cr, td);
return error;
}
int
smbfs_ioctl(ap)
struct vop_ioctl_args /* {
struct vnode *a_vp;
u_long a_command;
caddr_t a_data;
int fflag;
struct ucred *cred;
struct thread *td;
} */ *ap;
{
return EINVAL;
}
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, td);
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(ap)
struct vop_advlock_args /* {
struct vnode *a_vp;
caddr_t a_id;
int a_op;
struct flock *a_fl;
int a_flags;
} */ *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;
}
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:
return EINVAL;
}
error = lf_advlock(ap, &np->n_lockf, size);
if (error)
break;
lkop = SMB_LOCK_EXCL;
error = smbfs_smb_lock(np, lkop, id, start, end, &scred);
if (error) {
ap->a_op = F_UNLCK;
lf_advlock(ap, &np->n_lockf, size);
}
break;
case F_UNLCK:
lf_advlock(ap, &np->n_lockf, size);
error = smbfs_smb_lock(np, SMB_LOCK_RELEASE, id, start, end, &scred);
break;
case F_GETLK:
error = lf_advlock(ap, &np->n_lockf, size);
break;
default:
return EINVAL;
}
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;
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 = index(name, '.');
if (cp == NULL)
return error;
if (cp == name || (cp - name) > 8)
return error;
cp = index(cp + 1, '.');
if (cp != NULL)
return error;
for (cp = name, i = 0; i < nmlen; i++, cp++)
if (index(badchars83, *cp) != NULL)
return error;
}
for (cp = name, i = 0; i < nmlen; i++, cp++)
if (index(badchars, *cp) != NULL)
return error;
return 0;
}
#ifndef PDIRUNLOCK
#define PDIRUNLOCK 0
#endif
/*
* Things go even weird without fixed inode numbers...
*/
int
smbfs_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 thread *td = cnp->cn_thread;
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 lockparent, wantparent, error, islastcn, isdot;
SMBVDEBUG("\n");
cnp->cn_flags &= ~PDIRUNLOCK;
if (dvp->v_type != VDIR)
return ENOTDIR;
if ((flags & ISDOTDOT) && (dvp->v_vflag & VV_ROOT)) {
SMBFSERR("invalid '..'\n");
return EIO;
}
#ifdef SMB_VNODE_DEBUG
{
char *cp, c;
cp = name + nmlen;
c = *cp;
*cp = 0;
SMBVDEBUG("%d '%s' in '%s' id=d\n", nameiop, name,
VTOSMB(dvp)->n_name);
*cp = c;
}
#endif
islastcn = flags & ISLASTCN;
if (islastcn && (mp->mnt_flag & MNT_RDONLY) && (nameiop != LOOKUP))
return EROFS;
if ((error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td)) != 0)
return error;
lockparent = flags & LOCKPARENT;
wantparent = flags & (LOCKPARENT|WANTPARENT);
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);
SMBVDEBUG("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;
SMBVDEBUG("cached '.'\n");
} else if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td); /* unlock parent */
cnp->cn_flags |= PDIRUNLOCK;
error = vget(vp, LK_EXCLUSIVE, td);
if (!error && lockparent && islastcn) {
error = vn_lock(dvp, LK_EXCLUSIVE, td);
if (error == 0)
cnp->cn_flags &= ~PDIRUNLOCK;
}
} else {
error = vget(vp, LK_EXCLUSIVE, td);
if (!lockparent || error || !islastcn) {
VOP_UNLOCK(dvp, 0, td);
cnp->cn_flags |= PDIRUNLOCK;
}
}
if (!error) {
if (vpid == vp->v_id) {
if (!VOP_GETATTR(vp, &vattr, cnp->cn_cred, td)
/* && vattr.va_ctime.tv_sec == VTOSMB(vp)->n_ctime*/) {
if (nameiop != LOOKUP && islastcn)
cnp->cn_flags |= SAVENAME;
SMBVDEBUG("use cached vnode\n");
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) {
cnp->cn_flags |= PDIRUNLOCK;
return (error);
}
cnp->cn_flags &= ~PDIRUNLOCK;
}
/*
* entry is not in the cache or has been expired
*/
error = 0;
*vpp = NULLVP;
smb_makescred(&scred, td, cnp->cn_cred);
fap = &fattr;
if (flags & ISDOTDOT) {
error = smbfs_smb_lookup(dnp->n_parent, NULL, 0, fap, &scred);
SMBVDEBUG("result of dotdot lookup: %d\n", error);
} else {
fap = &fattr;
error = smbfs_smb_lookup(dnp, name, nmlen, fap, &scred);
/* if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.')*/
SMBVDEBUG("result of smbfs_smb_lookup: %d\n", error);
}
if (error && error != ENOENT)
return error;
if (error) { /* entry not found */
/*
* Handle RENAME or CREATE case...
*/
if ((nameiop == CREATE || nameiop == RENAME) && wantparent && islastcn) {
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
if (error)
return error;
cnp->cn_flags |= SAVENAME;
if (!lockparent) {
VOP_UNLOCK(dvp, 0, td);
cnp->cn_flags |= PDIRUNLOCK;
}
return (EJUSTRETURN);
}
return ENOENT;
}/* 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)
return error;
if (isdot) {
VREF(dvp);
*vpp = dvp;
return 0;
}
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
return error;
*vpp = vp;
cnp->cn_flags |= SAVENAME;
if (!lockparent) {
VOP_UNLOCK(dvp, 0, td);
cnp->cn_flags |= PDIRUNLOCK;
}
return 0;
}
if (nameiop == RENAME && islastcn && wantparent) {
error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
if (error)
return error;
if (isdot)
return EISDIR;
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
return error;
*vpp = vp;
cnp->cn_flags |= SAVENAME;
if (!lockparent) {
VOP_UNLOCK(dvp, 0, td);
cnp->cn_flags |= PDIRUNLOCK;
}
return 0;
}
if (flags & ISDOTDOT) {
VOP_UNLOCK(dvp, 0, td);
error = smbfs_nget(mp, dvp, name, nmlen, NULL, &vp);
if (error) {
vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
return error;
}
if (lockparent && islastcn) {
error = vn_lock(dvp, LK_EXCLUSIVE, td);
if (error) {
cnp->cn_flags |= PDIRUNLOCK;
vput(vp);
return error;
}
}
*vpp = vp;
} else if (isdot) {
vref(dvp);
*vpp = dvp;
} else {
error = smbfs_nget(mp, dvp, name, nmlen, fap, &vp);
if (error)
return error;
*vpp = vp;
SMBVDEBUG("lookup: getnewvp!\n");
if (!lockparent || !islastcn) {
VOP_UNLOCK(dvp, 0, td);
cnp->cn_flags |= PDIRUNLOCK;
}
}
if ((cnp->cn_flags & MAKEENTRY)/* && !islastcn*/) {
/* VTOSMB(*vpp)->n_ctime = VTOSMB(*vpp)->n_vattr.va_ctime.tv_sec;*/
cache_enter(dvp, *vpp, cnp);
}
return 0;
}
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