/*
* Get the change attribute from visible and returns TRUE.
* If the change value is not available returns FALSE.
*/
bool_t
nfs_visible_change(struct exportinfo *exi, vnode_t *vp, timespec_t *change)
{
struct exp_visible *visp;
fid_t fid;
treenode_t *node;
/*
* First check to see if vp is export root.
*/
if (VN_CMP(vp, exi->exi_vp))
goto exproot;
/*
* Only a PSEUDO node has a visible list or an exported VROOT
* node may have a visible list.
*/
if (!PSEUDO(exi))
exi = get_root_export(exi);
/* Get the fid of the vnode */
bzero(&fid, sizeof (fid));
fid.fid_len = MAXFIDSZ;
if (vop_fid_pseudo(vp, &fid) != 0)
return (FALSE);
/*
* We can't trust VN_CMP() above because of LOFS.
* Even though VOP_CMP will do the right thing for LOFS
* objects, VN_CMP will short circuit out early when the
* vnode ops ptrs are different. Just in case we're dealing
* with LOFS, compare exi_fid/fsid here.
*/
if (EQFID(&exi->exi_fid, &fid) &&
EQFSID(&exi->exi_fsid, &vp->v_vfsp->vfs_fsid))
goto exproot;
/* See if it matches any fid in the visible list */
for (visp = exi->exi_visible; visp; visp = visp->vis_next) {
if (EQFID(&fid, &visp->vis_fid)) {
*change = visp->vis_change;
return (TRUE);
}
}
return (FALSE);
exproot:
/* The VROOT export have its visible available through treenode */
node = exi->exi_tree;
if (node != ns_root) {
ASSERT(node->tree_vis != NULL);
*change = node->tree_vis->vis_change;
} else {
ASSERT(node->tree_vis == NULL);
*change = ns_root_change;
}
return (TRUE);
}
/*
* Return true if the supplied vnode has a sub-directory exported.
*/
int
has_visible(struct exportinfo *exi, vnode_t *vp)
{
struct exp_visible *visp;
fid_t fid;
bool_t vp_is_exported;
vp_is_exported = VN_CMP(vp, exi->exi_vp);
/*
* An exported root vnode has a sub-dir shared if it has a visible list.
* i.e. if it does not have a visible list, then there is no node in
* this filesystem leads to any other shared node.
*/
if (vp_is_exported && (vp->v_flag & VROOT))
return (exi->exi_visible ? 1 : 0);
/*
* Only the exportinfo of a fs root node may have a visible list.
* Either it is a pseudo root node, or a real exported root node.
*/
exi = get_root_export(exi);
if (!exi->exi_visible)
return (0);
/* Get the fid of the vnode */
bzero(&fid, sizeof (fid));
fid.fid_len = MAXFIDSZ;
if (vop_fid_pseudo(vp, &fid) != 0) {
return (0);
}
/*
* See if vp is in the visible list of the root node exportinfo.
*/
for (visp = exi->exi_visible; visp; visp = visp->vis_next) {
if (EQFID(&fid, &visp->vis_fid)) {
/*
* If vp is an exported non-root node with only 1 path
* count (for itself), it indicates no sub-dir shared
* using this vp as a path.
*/
if (vp_is_exported && visp->vis_count < 2)
break;
return (1);
}
}
return (0);
}
/*
* Returns true if the supplied inode is visible
* in this export. This function is used by
* readdir which uses inode numbers from the
* directory.
*
* NOTE: this code does not match inode number for ".",
* but it isn't required because NFS4 server rddir
* skips . and .. entries.
*/
int
nfs_visible_inode(struct exportinfo *exi, ino64_t ino,
struct exp_visible **visp)
{
/*
* Only a PSEUDO node has a visible list or an exported VROOT
* node may have a visible list.
*/
if (! PSEUDO(exi))
exi = get_root_export(exi);
for (*visp = exi->exi_visible; *visp != NULL; *visp = (*visp)->vis_next)
if ((u_longlong_t)ino == (*visp)->vis_ino) {
return (1);
}
return (0);
}
/*
* Returns true if the supplied inode is visible
* in this export. This function is used by
* readdir which uses inode numbers from the
* directory.
*
* NOTE: this code does not match inode number for ".",
* but it isn't required because NFS4 server rddir
* skips . and .. entries.
*/
int
nfs_visible_inode(struct exportinfo *exi, ino64_t ino, int *expseudo)
{
struct exp_visible *visp;
/*
* Only a PSEUDO node has a visible list or an exported VROOT
* node may have a visible list.
*/
if (! PSEUDO(exi))
exi = get_root_export(exi);
for (visp = exi->exi_visible; visp; visp = visp->vis_next)
if ((u_longlong_t)ino == visp->vis_ino) {
*expseudo = visp->vis_exported;
return (1);
}
*expseudo = 0;
return (0);
}
/*
* Returns true if the supplied vnode is visible
* in this export. If vnode is visible, return
* vis_exported in expseudo.
*/
int
nfs_visible(struct exportinfo *exi, vnode_t *vp, int *expseudo)
{
struct exp_visible *visp;
fid_t fid;
/*
* First check to see if vp is export root.
*
* A pseudo export root can never be exported
* (it would be a real export then); however,
* it is always visible. If a pseudo root object
* was exported by server admin, then the entire
* pseudo exportinfo (and all visible entries) would
* be destroyed. A pseudo exportinfo only exists
* to provide access to real (descendant) export(s).
*
* Previously, rootdir was special cased here; however,
* the export root special case handles the rootdir
* case also.
*/
if (VN_CMP(vp, exi->exi_vp)) {
*expseudo = 0;
return (1);
}
/*
* Only a PSEUDO node has a visible list or an exported VROOT
* node may have a visible list.
*/
if (! PSEUDO(exi))
exi = get_root_export(exi);
/* Get the fid of the vnode */
bzero(&fid, sizeof (fid));
fid.fid_len = MAXFIDSZ;
if (vop_fid_pseudo(vp, &fid) != 0) {
*expseudo = 0;
return (0);
}
/*
* We can't trust VN_CMP() above because of LOFS.
* Even though VOP_CMP will do the right thing for LOFS
* objects, VN_CMP will short circuit out early when the
* vnode ops ptrs are different. Just in case we're dealing
* with LOFS, compare exi_fid/fsid here.
*
* expseudo is not set because this is not an export
*/
if (EQFID(&exi->exi_fid, &fid) &&
EQFSID(&exi->exi_fsid, &vp->v_vfsp->vfs_fsid)) {
*expseudo = 0;
return (1);
}
/* See if it matches any fid in the visible list */
for (visp = exi->exi_visible; visp; visp = visp->vis_next) {
if (EQFID(&fid, &visp->vis_fid)) {
*expseudo = visp->vis_exported;
return (1);
}
}
*expseudo = 0;
return (0);
}
