/*
* Read back the persistent representation of an active case.
*/
static zfs_case_t *
zfs_case_unserialize(fmd_hdl_t *hdl, fmd_case_t *cp)
{
zfs_case_t *zcp;
zcp = fmd_hdl_zalloc(hdl, sizeof (zfs_case_t), FMD_SLEEP);
zcp->zc_case = cp;
fmd_buf_read(hdl, cp, CASE_DATA, &zcp->zc_data,
sizeof (zcp->zc_data));
if (zcp->zc_data.zc_version > CASE_DATA_VERSION_SERD) {
fmd_hdl_free(hdl, zcp, sizeof (zfs_case_t));
return (NULL);
}
/*
* fmd_buf_read() will have already zeroed out the remainder of the
* buffer, so we don't have to do anything special if the version
* doesn't include the SERD engine name.
*/
if (zcp->zc_data.zc_has_remove_timer)
zcp->zc_remove_timer = fmd_timer_install(hdl, zcp,
NULL, zfs_remove_timeout);
uu_list_node_init(zcp, &zcp->zc_node, zfs_case_pool);
(void) uu_list_insert_before(zfs_cases, NULL, zcp);
fmd_case_setspecific(hdl, cp, zcp);
return (zcp);
}
/*
* int wait_register(pid_t, char *, int, int)
* wait_register is called after we have called fork(2), and know which pid we
* wish to monitor. However, since the child may have already exited by the
* time we are called, we must handle the error cases from open(2)
* appropriately. The am_parent flag is recorded to handle waitpid(2)
* behaviour on removal; similarly, the direct flag is passed through to a
* potential call to wait_remove() to govern its behaviour in different
* contexts.
*
* Returns 0 if registration successful, 1 if child pid did not exist, and -1
* if a different error occurred.
*/
int
wait_register(pid_t pid, const char *inst_fmri, int am_parent, int direct)
{
char *fname = uu_msprintf("/proc/%ld/psinfo", pid);
int fd;
wait_info_t *wi;
assert(pid != 0);
if (fname == NULL)
return (-1);
wi = startd_alloc(sizeof (wait_info_t));
uu_list_node_init(wi, &wi->wi_link, wait_info_pool);
wi->wi_fd = -1;
wi->wi_pid = pid;
wi->wi_fmri = inst_fmri;
wi->wi_parent = am_parent;
wi->wi_ignore = 0;
MUTEX_LOCK(&wait_info_lock);
(void) uu_list_insert_before(wait_info_list, NULL, wi);
MUTEX_UNLOCK(&wait_info_lock);
if ((fd = open(fname, O_RDONLY)) == -1) {
if (errno == ENOENT) {
/*
* Child has already exited.
*/
wait_remove(wi, direct);
uu_free(fname);
return (1);
} else {
log_error(LOG_WARNING,
"open %s failed; not monitoring %s: %s\n", fname,
inst_fmri, strerror(errno));
uu_free(fname);
return (-1);
}
}
uu_free(fname);
wi->wi_fd = fd;
if (port_associate(port_fd, PORT_SOURCE_FD, fd, 0, wi)) {
log_error(LOG_WARNING,
"initial port_association of %d / %s failed: %s\n", fd,
inst_fmri, strerror(errno));
return (-1);
}
log_framework(LOG_DEBUG, "monitoring PID %ld on fd %d (%s)\n", pid, fd,
inst_fmri);
return (0);
}
static int
change_one(zfs_handle_t *zhp, void *data)
{
prop_changelist_t *clp = data;
char property[ZFS_MAXPROPLEN];
char where[64];
prop_changenode_t *cn;
zprop_source_t sourcetype;
zprop_source_t share_sourcetype;
/*
* We only want to unmount/unshare those filesystems that may inherit
* from the target filesystem. If we find any filesystem with a
* locally set mountpoint, we ignore any children since changing the
* property will not affect them. If this is a rename, we iterate
* over all children regardless, since we need them unmounted in
* order to do the rename. Also, if this is a volume and we're doing
* a rename, then always add it to the changelist.
*/
if (!(ZFS_IS_VOLUME(zhp) && clp->cl_realprop == ZFS_PROP_NAME) &&
zfs_prop_get(zhp, clp->cl_prop, property,
sizeof (property), &sourcetype, where, sizeof (where),
B_FALSE) != 0) {
zfs_close(zhp);
return (0);
}
/*
* If we are "watching" sharenfs or sharesmb
* then check out the companion property which is tracked
* in cl_shareprop
*/
if (clp->cl_shareprop != ZPROP_INVAL &&
zfs_prop_get(zhp, clp->cl_shareprop, property,
sizeof (property), &share_sourcetype, where, sizeof (where),
B_FALSE) != 0) {
zfs_close(zhp);
return (0);
}
if (clp->cl_alldependents || clp->cl_allchildren ||
sourcetype == ZPROP_SRC_DEFAULT ||
sourcetype == ZPROP_SRC_INHERITED ||
(clp->cl_shareprop != ZPROP_INVAL &&
(share_sourcetype == ZPROP_SRC_DEFAULT ||
share_sourcetype == ZPROP_SRC_INHERITED))) {
if ((cn = zfs_alloc(zfs_get_handle(zhp),
sizeof (prop_changenode_t))) == NULL) {
zfs_close(zhp);
return (-1);
}
cn->cn_handle = zhp;
cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) ||
zfs_is_mounted(zhp, NULL);
cn->cn_shared = zfs_is_shared(zhp);
cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
cn->cn_needpost = B_TRUE;
/* Indicate if any child is exported to a local zone. */
if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned)
clp->cl_haszonedchild = B_TRUE;
uu_list_node_init(cn, &cn->cn_listnode, clp->cl_pool);
if (clp->cl_sorted) {
uu_list_index_t idx;
(void) uu_list_find(clp->cl_list, cn, NULL,
&idx);
uu_list_insert(clp->cl_list, cn, idx);
} else {
/*
* Add this child to beginning of the list. Children
* below this one in the hierarchy will get added above
* this one in the list. This produces a list in
* reverse dataset name order.
* This is necessary when the original mountpoint
* is legacy or none.
*/
verify(uu_list_insert_before(clp->cl_list,
uu_list_first(clp->cl_list), cn) == 0);
}
if (!clp->cl_alldependents)
return (zfs_iter_children(zhp, change_one, data));
} else {
zfs_close(zhp);
}
return (0);
}
static int
change_one(zfs_handle_t *zhp, void *data)
{
prop_changelist_t *clp = data;
char property[ZFS_MAXPROPLEN];
char where[64];
prop_changenode_t *cn;
zfs_source_t sourcetype;
/*
* We only want to unmount/unshare those filesystems that may inherit
* from the target filesystem. If we find any filesystem with a
* locally set mountpoint, we ignore any children since changing the
* property will not affect them. If this is a rename, we iterate
* over all children regardless, since we need them unmounted in
* order to do the rename. Also, if this is a volume and we're doing
* a rename, then always add it to the changelist.
*/
if (!(ZFS_IS_VOLUME(zhp) && clp->cl_realprop == ZFS_PROP_NAME) &&
zfs_prop_get(zhp, clp->cl_prop, property,
sizeof (property), &sourcetype, where, sizeof (where),
B_FALSE) != 0) {
zfs_close(zhp);
return (0);
}
if (clp->cl_alldependents || clp->cl_allchildren ||
sourcetype == ZFS_SRC_DEFAULT || sourcetype == ZFS_SRC_INHERITED) {
if ((cn = zfs_alloc(zfs_get_handle(zhp),
sizeof (prop_changenode_t))) == NULL) {
zfs_close(zhp);
return (-1);
}
cn->cn_handle = zhp;
cn->cn_mounted = zfs_is_mounted(zhp, NULL);
cn->cn_shared = zfs_is_shared(zhp);
#ifndef __APPLE__
cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
/* Indicate if any child is exported to a local zone. */
if (getzoneid() == GLOBAL_ZONEID && cn->cn_zoned)
clp->cl_haszonedchild = B_TRUE;
#endif /*!__APPLE__*/
uu_list_node_init(cn, &cn->cn_listnode, clp->cl_pool);
if (clp->cl_sorted) {
uu_list_index_t idx;
(void) uu_list_find(clp->cl_list, cn, NULL,
&idx);
uu_list_insert(clp->cl_list, cn, idx);
} else {
ASSERT(!clp->cl_alldependents);
verify(uu_list_insert_before(clp->cl_list,
uu_list_first(clp->cl_list), cn) == 0);
}
if (!clp->cl_alldependents)
return (zfs_iter_children(zhp, change_one, data));
} else {
zfs_close(zhp);
}
return (0);
}
