sdev_netops.c revision d62bc4badc1c1f1549c961cfb8b420e650e1272b
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * CDDL HEADER START
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * The contents of this file are subject to the terms of the
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Common Development and Distribution License (the "License").
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * You may not use this file except in compliance with the License.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * See the License for the specific language governing permissions
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * and limitations under the License.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * When distributing Covered Code, include this CDDL HEADER in each
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * If applicable, add the following below this CDDL HEADER, with the
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * fields enclosed by brackets "[]" replaced with your own identifying
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * information: Portions Copyright [yyyy] [name of copyright owner]
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * CDDL HEADER END
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Use is subject to license terms.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome#pragma ident "%Z%%M% %I% %E% SMI"
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * vnode ops for the /dev/net directory
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * The lookup is based on the internal vanity naming node table. We also
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * override readdir in order to delete net nodes no longer in-use.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Called by zone_walk_datalink() to see if the given link name belongs to the
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * given zone. Returns 0 to continue the walk, -1 if the link name is found.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_validate_name(const char *link, void *arg)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Check if a net sdev_node is still valid - i.e. it represents a current
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * network link.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * This serves two purposes
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * - only valid net nodes are returned during lookup() and readdir().
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * - since net sdev_nodes are not actively destroyed when a network link
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * goes away, we use the validator to do deferred cleanup i.e. when such
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * nodes are encountered during subsequent lookup() and readdir().
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome return ((dls_mgmt_get_linkid(nm, &linkid) != 0) ?
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome return ((zone_datalink_walk(getzoneid(), devnet_validate_name,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome nm) == -1) ? SDEV_VTOR_VALID : SDEV_VTOR_INVALID);
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * This callback is invoked from devname_lookup_func() to create
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * a net entry when the node is not found in the cache.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_create_rvp(const char *nm, struct vattr *vap, dls_dl_handle_t *ddhp)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if ((error = dls_devnet_open(nm, ddhp, &dev)) != 0) {
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome sdcmn_err12(("devnet_create_rvp: not a valid vanity name "
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * This is a valid network device (at least at this point in time).
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Create the node by setting the attribute; the rest is taken care
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * of by devname_lookup_func().
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Lookup for /dev/net directory
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * If the entry does not exist, the devnet_create_rvp() callback
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * is invoked to create it. Nodes do not persist across reboot.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome/*ARGSUSED3*/
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_lookup(struct vnode *dvp, char *nm, struct vnode **vpp,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome struct pathname *pnp, int flags, struct vnode *rdir, struct cred *cred,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome caller_context_t *ct, int *direntflags, pathname_t *realpnp)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Empty name or ., return node itself.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if ((nmlen == 0) || ((nmlen == 1) && (nm[0] == '.'))) {
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * .., return the parent directory
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * directory cache lookup:
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if ((dv = sdev_cache_lookup(ddv, nm)) != NULL) {
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * ZOMBIED parent does not allow new node creation, bail out early.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome error = sdev_mknode(ddv, nm, &dv, &vattr, NULL, NULL, cred, SDEV_READY);
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * SDEV_ATTR_INVALID means that this device has been
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * detached, and its dev_t might've been changed too.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Therefore, sdev_node's 'vattr' needs to be updated.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_filldir_datalink(const char *link, void *arg)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if ((dv = sdev_cache_lookup(ddv, (char *)link)) != NULL)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if (devnet_create_rvp(link, &vattr, &ddh) != 0)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if (sdev_mknode(ddv, (char *)link, &dv, &vattr, NULL, NULL, kcred,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * As there is no reference holding the network device, it could be
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * detached. Set SDEV_ATTR_INVALID so that the 'vattr' will be updated
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if (rw_tryupgrade(&ddv->sdev_contents) == NULL) {
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome /* skip stale nodes */
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome /* validate and prune only ready nodes */
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome sdcmn_err12(("devnet_filldir: destroy invalid "
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome /* remove the cache node */
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome (void) sdev_cache_update(ddv, &dv, dv->sdev_name,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome if (((ddv->sdev_flags & SDEV_BUILD) == 0) && !dls_devnet_rebuild())
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome linkid = dls_mgmt_get_next(linkid, DATALINK_CLASS_ALL,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * Display all instantiated network datalink device nodes.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * A /dev/net entry will be created only after the first lookup of
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * the network datalink device succeeds.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome/*ARGSUSED4*/
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_readdir(struct vnode *dvp, struct uio *uiop, struct cred *cred,
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome return (devname_readdir_func(dvp, uiop, cred, eofp, 0));
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * This callback is invoked from devname_inactive_func() to release
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * the net entry which was held in devnet_create_rvp().
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * "ddh" (sdev_private) could be NULL if devnet_lookup fails.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomedevnet_inactive(struct vnode *dvp, struct cred *cred, caller_context_t *ct)
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome devname_inactive_func(dvp, cred, devnet_inactive_callback);
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * We override lookup and readdir to build entries based on the
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome * in kernel vanity naming node table.
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soomeconst fs_operation_def_t devnet_vnodeops_tbl[] = {
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome VOPNAME_READDIR, { .vop_readdir = devnet_readdir },
afc2ba1deb75b323afde536f2dd18bcafdaa308dToomas Soome VOPNAME_LOOKUP, { .vop_lookup = devnet_lookup },