/*
* Add the proto list contained in array 'plist' to entry 'entry', storing
* aside the scf_value_t's created and added to the entry in a list that the
* pointer referenced by sv_list is made to point at.
*/
static void
add_proto_list(scf_transaction_entry_t *entry, scf_handle_t *hdl,
char **plist, uu_list_t **sv_list)
{
scf_val_el_t *sv_el;
int i;
static uu_list_pool_t *sv_pool = NULL;
if ((sv_pool == NULL) &&
((sv_pool = uu_list_pool_create("sv_pool",
sizeof (scf_val_el_t), offsetof(scf_val_el_t, link), NULL,
UU_LIST_POOL_DEBUG)) == NULL))
uu_die(gettext("Error: %s.\n"), uu_strerror(uu_error()));
if ((*sv_list = uu_list_create(sv_pool, NULL, 0)) == NULL)
uu_die(gettext("Error: %s.\n"), uu_strerror(uu_error()));
for (i = 0; plist[i] != NULL; i++) {
if ((sv_el = malloc(sizeof (scf_val_el_t))) == NULL)
uu_die(gettext("Error:"));
if (((sv_el->val = scf_value_create(hdl)) == NULL) ||
(scf_value_set_astring(sv_el->val, plist[i]) != 0) ||
(scf_entry_add_value(entry, sv_el->val) != 0))
scfdie();
uu_list_node_init(sv_el, &sv_el->link, sv_pool);
(void) uu_list_insert_after(*sv_list, NULL, sv_el);
}
}
static void
add_prop(char *property)
{
svcprop_prop_node_t *p, *last;
char *slash;
const char * const invalid_component_emsg =
gettext("Invalid component name `%s'.\n");
/* FMRI syntax knowledge. */
slash = strchr(property, '/');
if (slash != NULL) {
if (strchr(slash + 1, '/') != NULL) {
uu_warn(gettext("-p argument `%s' has too many "
"components.\n"), property);
usage();
}
}
if (slash != NULL)
*slash = '\0';
p = safe_malloc(sizeof (svcprop_prop_node_t));
uu_list_node_init(p, &p->spn_list_node, prop_pool);
p->spn_comp1 = property;
p->spn_comp2 = (slash == NULL) ? NULL : slash + 1;
if (uu_check_name(p->spn_comp1, UU_NAME_DOMAIN) == -1)
uu_xdie(UU_EXIT_USAGE, invalid_component_emsg, p->spn_comp1);
if (p->spn_comp2 != NULL &&
uu_check_name(p->spn_comp2, UU_NAME_DOMAIN) == -1)
uu_xdie(UU_EXIT_USAGE, invalid_component_emsg, p->spn_comp2);
last = uu_list_last(prop_list);
if (last != NULL) {
if ((last->spn_comp2 == NULL) ^ (p->spn_comp2 == NULL)) {
/*
* The -p options have mixed numbers of components.
* If they both turn out to be valid, then the
* single-component ones will specify property groups,
* so we need to turn on types to keep the output of
* display_prop() consistent with display_pg().
*/
types = 1;
}
}
(void) uu_list_insert_after(prop_list, NULL, p);
}
/* Add 'call' to the connection indication queue 'queue'. */
int
queue_conind(uu_list_t *queue, struct t_call *call)
{
tlx_conn_ind_t *ci;
if ((ci = malloc(sizeof (tlx_conn_ind_t))) == NULL) {
error_msg(strerror(errno));
return (-1);
}
ci->call = call;
uu_list_node_init(ci, &ci->link, conn_ind_pool);
(void) uu_list_insert_after(queue, NULL, ci);
return (0);
}
/*
* valid_props validates all the properties in an array of inetd_prop_t's,
* marking each property as valid or invalid. If any properties are invalid,
* it returns B_FALSE, otherwise it returns B_TRUE. Note that some properties
* are interdependent, so if one is invalid, it leaves others in an
* indeterminate state (such as ISRPC and SVC_NAME). In this case, the
* indeterminate property will be marked valid. IE, the only properties
* marked invalid are those that are KNOWN to be invalid.
*
* Piggy-backed onto this validation if 'fmri' is non-NULL is the construction
* of a structured configuration, a basic_cfg_t, which is used by inetd.
* If 'fmri' is set then the latter three parameters need to be set to
* non-NULL values, and if the configuration is valid, the storage referenced
* by cfgpp is set to point at an initialized basic_cfg_t.
*/
boolean_t
valid_props(inetd_prop_t *prop, const char *fmri, basic_cfg_t **cfgpp,
uu_list_pool_t *proto_info_pool, uu_list_pool_t *tlx_ci_pool)
{
char *bufp, *cp;
boolean_t ret = B_TRUE;
int i;
long uidl;
boolean_t isrpc;
int sock_type_id;
int rpc_pnum;
int rpc_lv, rpc_hv;
basic_cfg_t *cfg;
char *proto = NULL;
int pi;
char **netids = NULL;
int ni = 0;
if (fmri != NULL)
assert((cfgpp != NULL) && (proto_info_pool != NULL) &&
(tlx_ci_pool != NULL));
/*
* Set all checkable properties to valid as a baseline. We'll be
* marking all invalid properties.
*/
for (i = 0; prop[i].ip_name != NULL; i++) {
if (prop[i].ip_error != IVE_UNSET)
prop[i].ip_error = IVE_VALID;
}
if (((cfg = calloc(1, sizeof (basic_cfg_t))) == NULL) ||
((fmri != NULL) &&
((cfg->proto_list = uu_list_create(proto_info_pool, NULL, 0)) ==
NULL))) {
free(cfg);
return (B_FALSE);
}
/* Check a service name was supplied */
if ((prop[PT_SVC_NAME_INDEX].ip_error == IVE_UNSET) ||
((cfg->svc_name =
strdup(prop[PT_SVC_NAME_INDEX].ip_value.iv_string)) == NULL))
prop[PT_SVC_NAME_INDEX].ip_error = IVE_INVALID;
/* Check that iswait and isrpc have valid boolean values */
if ((prop[PT_ISWAIT_INDEX].ip_error == IVE_UNSET) ||
(((cfg->iswait = prop[PT_ISWAIT_INDEX].ip_value.iv_boolean) !=
B_TRUE) && (cfg->iswait != B_FALSE)))
prop[PT_ISWAIT_INDEX].ip_error = IVE_INVALID;
if ((prop[PT_ISRPC_INDEX].ip_error == IVE_UNSET) ||
(((isrpc = prop[PT_ISRPC_INDEX].ip_value.iv_boolean) != B_TRUE) &&
(isrpc != B_FALSE))) {
prop[PT_ISRPC_INDEX].ip_error = IVE_INVALID;
} else if (isrpc) {
/*
* This is an RPC service, so ensure that the RPC version
* numbers are zero or greater, that the low version isn't
* greater than the high version and a valid program name
* is supplied.
*/
if ((prop[PT_RPC_LW_VER_INDEX].ip_error == IVE_UNSET) ||
((rpc_lv = prop[PT_RPC_LW_VER_INDEX].ip_value.iv_int) <
0))
prop[PT_RPC_LW_VER_INDEX].ip_error = IVE_INVALID;
if ((prop[PT_RPC_HI_VER_INDEX].ip_error == IVE_UNSET) ||
((rpc_hv = prop[PT_RPC_HI_VER_INDEX].ip_value.iv_int) <
0))
prop[PT_RPC_HI_VER_INDEX].ip_error = IVE_INVALID;
if ((prop[PT_RPC_LW_VER_INDEX].ip_error != IVE_INVALID) &&
(prop[PT_RPC_HI_VER_INDEX].ip_error != IVE_INVALID) &&
(rpc_lv > rpc_hv)) {
prop[PT_RPC_LW_VER_INDEX].ip_error = IVE_INVALID;
prop[PT_RPC_HI_VER_INDEX].ip_error = IVE_INVALID;
}
if ((cfg->svc_name != NULL) &&
((rpc_pnum = get_rpc_prognum(cfg->svc_name)) == -1))
prop[PT_SVC_NAME_INDEX].ip_error = IVE_INVALID;
}
/* Check that the socket type is one of the acceptable values. */
cfg->istlx = B_FALSE;
if ((prop[PT_SOCK_TYPE_INDEX].ip_error == IVE_UNSET) ||
((sock_type_id = get_sock_type_id(
prop[PT_SOCK_TYPE_INDEX].ip_value.iv_string)) == -1) &&
!(cfg->istlx = is_tlx_service(prop)))
prop[PT_SOCK_TYPE_INDEX].ip_error = IVE_INVALID;
/* Get the bind address */
if (!cfg->istlx && prop[PT_BIND_ADDR_INDEX].ip_error != IVE_UNSET &&
(cfg->bind_addr =
strdup(prop[PT_BIND_ADDR_INDEX].ip_value.iv_string)) == NULL)
prop[PT_BIND_ADDR_INDEX].ip_error = IVE_INVALID;
/*
* Iterate through all the different protos/netids resulting from the
* proto property and check that they're valid and perform checks on
* other fields that are tied-in with the proto.
*/
pi = 0;
do {
socket_info_t *si = NULL;
tlx_info_t *ti = NULL;
proto_info_t *p_inf = NULL;
boolean_t v6only = B_FALSE;
char *only;
boolean_t invalid_proto = B_FALSE;
char **protos;
struct protoent pe;
char gpbuf[1024];
struct netconfig *nconf = NULL;
/*
* If we don't know whether it's an rpc service or its
* endpoint type, we can't do any of the proto checks as we
* have no context; break out.
*/
if ((prop[PT_ISRPC_INDEX].ip_error != IVE_VALID) ||
(prop[PT_SOCK_TYPE_INDEX].ip_error != IVE_VALID))
break;
/* skip proto specific processing if the proto isn't set. */
if (prop[PT_PROTO_INDEX].ip_error == IVE_UNSET) {
invalid_proto = B_TRUE;
goto past_proto_processing;
}
protos = prop[PT_PROTO_INDEX].ip_value.iv_string_list;
/*
* Get the next netid/proto.
*/
if (!cfg->istlx || !isrpc) {
proto = protos[pi++];
/*
* This is a TLI/RPC service, so get the next netid, expanding
* any supplied nettype.
*/
} else if ((netids == NULL) ||
((proto = netids[ni++]) == NULL)) {
/*
* Either this is the first time around or
* we've exhausted the last set of netids, so
* try and get the next set using the currently
* indexed proto entry.
*/
if (netids != NULL) {
destroy_strings(netids);
netids = NULL;
}
if (protos[pi] != NULL) {
if ((netids = get_netids(protos[pi++])) ==
NULL) {
invalid_proto = B_TRUE;
proto = protos[pi - 1];
} else {
ni = 0;
proto = netids[ni++];
}
} else {
proto = NULL;
}
}
if (proto == NULL)
break;
if (invalid_proto)
goto past_proto_processing;
/* strip a trailing only to simplify further processing */
only = proto + strlen(proto) - (sizeof ("6only") - 1);
if ((only > proto) && (strcmp(only, "6only") == 0)) {
*++only = '\0';
v6only = B_TRUE;
}
/* validate the proto/netid */
if (!cfg->istlx) {
if (!valid_socket_proto(proto))
invalid_proto = B_TRUE;
} else {
/*
* Check if we've got a valid netid. If
* getnetconfigent() fails, we check to see whether
* we've got a v6 netid that may have been rejected
* because no IPv6 interface was configured before
* flagging 'proto' as invalid. If the latter condition
* holds, we don't flag the proto as invalid, and
* leave inetd to handle the value appropriately
* when it tries to listen on behalf of the service.
*/
if (((nconf = getnetconfigent(proto)) == NULL) &&
!v6_proto(proto))
invalid_proto = B_TRUE;
}
if (invalid_proto)
goto past_proto_processing;
/*
* dissallow datagram type nowait services
*/
if ((prop[PT_ISWAIT_INDEX].ip_error == IVE_VALID) &&
!cfg->iswait) {
if (strncmp(proto, SOCKET_PROTO_UDP,
sizeof (SOCKET_PROTO_UDP) - 1) == 0) {
invalid_proto = B_TRUE;
} else if (cfg->istlx && (nconf != NULL) &&
(nconf->nc_semantics == NC_TPI_CLTS)) {
invalid_proto = B_TRUE;
}
if (invalid_proto) {
prop[PT_ISWAIT_INDEX].ip_error = IVE_INVALID;
goto past_proto_processing;
}
}
/*
* We're running in validate only mode. Don't bother creating
* any proto structures (they don't do any further validation).
*/
if (fmri == NULL)
goto past_proto_processing;
/*
* Create the apropriate transport info structure.
*/
if (cfg->istlx) {
if ((ti = create_tlx_info(proto, tlx_ci_pool)) != NULL)
p_inf = (proto_info_t *)ti;
} else {
struct sockaddr_storage *ss;
if ((si = calloc(1, sizeof (socket_info_t))) != NULL) {
p_inf = (proto_info_t *)si;
si->type = sock_type_id;
ss = &si->local_addr;
if (v6_socket_proto(proto)) {
ss->ss_family = AF_INET6;
/* already in network order */
((struct sockaddr_in6 *)ss)->sin6_addr =
in6addr_any;
} else {
ss->ss_family = AF_INET;
((struct sockaddr_in *)ss)->sin_addr.
s_addr = htonl(INADDR_ANY);
}
if (set_bind_addr(ss, cfg->bind_addr) != 0) {
prop[PT_BIND_ADDR_INDEX].ip_error =
IVE_INVALID;
}
}
}
if (p_inf == NULL) {
invalid_proto = B_TRUE;
goto past_proto_processing;
}
p_inf->v6only = v6only;
/*
* Store the supplied proto string for error reporting,
* re-attaching the 'only' suffix if one was taken off.
*/
if ((p_inf->proto = malloc(strlen(proto) + 5)) == NULL) {
invalid_proto = B_TRUE;
goto past_proto_processing;
} else {
(void) strlcpy(p_inf->proto, proto, strlen(proto) + 5);
if (v6only)
(void) strlcat(p_inf->proto, "only",
strlen(proto) + 5);
}
/*
* Validate and setup RPC/non-RPC specifics.
*/
if (isrpc) {
rpc_info_t *ri;
if ((rpc_pnum != -1) && (rpc_lv != -1) &&
(rpc_hv != -1)) {
if ((ri = create_rpc_info(proto, rpc_pnum,
rpc_lv, rpc_hv)) == NULL) {
invalid_proto = B_TRUE;
} else {
p_inf->ri = ri;
}
}
}
past_proto_processing:
/* validate non-RPC service name */
if (!isrpc && (cfg->svc_name != NULL)) {
struct servent se;
char gsbuf[NSS_BUFLEN_SERVICES];
char *gsproto = proto;
if (invalid_proto) {
/*
* Make getservbyname_r do its lookup without a
* proto.
*/
gsproto = NULL;
} else if (gsproto != NULL) {
/*
* Since getservbyname & getprotobyname don't
* support tcp6, udp6 or sctp6 take off the 6
* digit from protocol.
*/
if (v6_socket_proto(gsproto))
gsproto[strlen(gsproto) - 1] = '\0';
}
if (getservbyname_r(cfg->svc_name, gsproto, &se, gsbuf,
sizeof (gsbuf)) == NULL) {
if (gsproto != NULL)
invalid_proto = B_TRUE;
prop[PT_SVC_NAME_INDEX].ip_error = IVE_INVALID;
} else if (cfg->istlx && (ti != NULL)) {
/* LINTED E_BAD_PTR_CAST_ALIGN */
SS_SETPORT(*(struct sockaddr_storage *)
ti->local_addr.buf, se.s_port);
} else if (!cfg->istlx && (si != NULL)) {
if ((gsproto != NULL) &&
getprotobyname_r(gsproto, &pe, gpbuf,
sizeof (gpbuf)) == NULL) {
invalid_proto = B_TRUE;
} else {
si->protocol = pe.p_proto;
}
SS_SETPORT(si->local_addr, se.s_port);
}
}
if (p_inf != NULL) {
p_inf->listen_fd = -1;
/* add new proto entry to proto_list */
uu_list_node_init(p_inf, &p_inf->link, proto_info_pool);
(void) uu_list_insert_after(cfg->proto_list, NULL,
p_inf);
}
if (nconf != NULL)
freenetconfigent(nconf);
if (invalid_proto)
prop[PT_PROTO_INDEX].ip_error = IVE_INVALID;
} while (proto != NULL); /* while just processed a proto */
/*
* Check that the exec string for the start method actually exists and
* that the user is either a valid username or uid. Note we don't
* mandate the setting of these fields, and don't do any checks
* for arg0, hence its absence.
*/
if (prop[PT_EXEC_INDEX].ip_error != IVE_UNSET) {
/* Don't pass any arguments to access() */
if ((bufp = strdup(
prop[PT_EXEC_INDEX].ip_value.iv_string)) == NULL) {
prop[PT_EXEC_INDEX].ip_error = IVE_INVALID;
} else {
if ((cp = strpbrk(bufp, " \t")) != NULL)
*cp = '\0';
if ((access(bufp, F_OK) == -1) && (errno == ENOENT))
prop[PT_EXEC_INDEX].ip_error = IVE_INVALID;
free(bufp);
}
}
if (prop[PT_USER_INDEX].ip_error != IVE_UNSET) {
char pw_buf[NSS_BUFLEN_PASSWD];
struct passwd pw;
if (getpwnam_r(prop[PT_USER_INDEX].ip_value.iv_string, &pw,
pw_buf, NSS_BUFLEN_PASSWD) == NULL) {
errno = 0;
uidl = strtol(prop[PT_USER_INDEX].ip_value.iv_string,
&bufp, 10);
if ((errno != 0) || (*bufp != '\0') ||
(getpwuid_r(uidl, &pw, pw_buf,
NSS_BUFLEN_PASSWD) == NULL))
prop[PT_USER_INDEX].ip_error = IVE_INVALID;
}
}
/*
* Iterate through the properties in the array verifying that any
* default properties are valid, and setting the return boolean
* according to whether any properties were marked invalid.
*/
for (i = 0; prop[i].ip_name != NULL; i++) {
if (prop[i].ip_error == IVE_UNSET)
continue;
if (prop[i].ip_default &&
!valid_default_prop(prop[i].ip_name, &prop[i].ip_value))
prop[i].ip_error = IVE_INVALID;
if (prop[i].ip_error == IVE_INVALID)
ret = B_FALSE;
}
/* pass back the basic_cfg_t if requested and it's a valid config */
if ((cfgpp != NULL) && ret) {
*cfgpp = cfg;
} else {
destroy_basic_cfg(cfg);
}
return (ret);
}
/*
* Given a ZFS handle and a property, construct a complete list of datasets
* that need to be modified as part of this process. For anything but the
* 'mountpoint' and 'sharenfs' properties, this just returns an empty list.
* Otherwise, we iterate over all children and look for any datasets that
* inherit the property. For each such dataset, we add it to the list and
* mark whether it was shared beforehand.
*/
prop_changelist_t *
changelist_gather(zfs_handle_t *zhp, zfs_prop_t prop, int gather_flags,
int mnt_flags)
{
prop_changelist_t *clp;
prop_changenode_t *cn;
zfs_handle_t *temp;
char property[ZFS_MAXPROPLEN];
uu_compare_fn_t *compare = NULL;
boolean_t legacy = B_FALSE;
if ((clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t))) == NULL)
return (NULL);
/*
* For mountpoint-related tasks, we want to sort everything by
* mountpoint, so that we mount and unmount them in the appropriate
* order, regardless of their position in the hierarchy.
*/
if (prop == ZFS_PROP_NAME || prop == ZFS_PROP_ZONED ||
prop == ZFS_PROP_MOUNTPOINT || prop == ZFS_PROP_SHARENFS ||
prop == ZFS_PROP_SHARESMB) {
if (zfs_prop_get(zhp, ZFS_PROP_MOUNTPOINT,
property, sizeof (property),
NULL, NULL, 0, B_FALSE) == 0 &&
(strcmp(property, "legacy") == 0 ||
strcmp(property, "none") == 0)) {
legacy = B_TRUE;
}
if (!legacy) {
compare = compare_mountpoints;
clp->cl_sorted = B_TRUE;
}
}
clp->cl_pool = uu_list_pool_create("changelist_pool",
sizeof (prop_changenode_t),
offsetof(prop_changenode_t, cn_listnode),
compare, 0);
if (clp->cl_pool == NULL) {
assert(uu_error() == UU_ERROR_NO_MEMORY);
(void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
changelist_free(clp);
return (NULL);
}
clp->cl_list = uu_list_create(clp->cl_pool, NULL,
clp->cl_sorted ? UU_LIST_SORTED : 0);
clp->cl_gflags = gather_flags;
clp->cl_mflags = mnt_flags;
if (clp->cl_list == NULL) {
assert(uu_error() == UU_ERROR_NO_MEMORY);
(void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
changelist_free(clp);
return (NULL);
}
/*
* If this is a rename or the 'zoned' property, we pretend we're
* changing the mountpoint and flag it so we can catch all children in
* change_one().
*
* Flag cl_alldependents to catch all children plus the dependents
* (clones) that are not in the hierarchy.
*/
if (prop == ZFS_PROP_NAME) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
clp->cl_alldependents = B_TRUE;
} else if (prop == ZFS_PROP_ZONED) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
clp->cl_allchildren = B_TRUE;
} else if (prop == ZFS_PROP_CANMOUNT) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
} else if (prop == ZFS_PROP_VOLSIZE) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
} else {
clp->cl_prop = prop;
}
clp->cl_realprop = prop;
if (clp->cl_prop != ZFS_PROP_MOUNTPOINT &&
clp->cl_prop != ZFS_PROP_SHARENFS &&
clp->cl_prop != ZFS_PROP_SHARESMB)
return (clp);
/*
* If watching SHARENFS or SHARESMB then
* also watch its companion property.
*/
if (clp->cl_prop == ZFS_PROP_SHARENFS)
clp->cl_shareprop = ZFS_PROP_SHARESMB;
else if (clp->cl_prop == ZFS_PROP_SHARESMB)
clp->cl_shareprop = ZFS_PROP_SHARENFS;
if (clp->cl_alldependents) {
if (zfs_iter_dependents(zhp, B_TRUE, change_one, clp) != 0) {
changelist_free(clp);
return (NULL);
}
} else if (zfs_iter_children(zhp, change_one, clp) != 0) {
changelist_free(clp);
return (NULL);
}
/*
* We have to re-open ourselves because we auto-close all the handles
* and can't tell the difference.
*/
if ((temp = zfs_open(zhp->zfs_hdl, zfs_get_name(zhp),
ZFS_TYPE_DATASET)) == NULL) {
changelist_free(clp);
return (NULL);
}
/*
* Always add ourself to the list. We add ourselves to the end so that
* we're the last to be unmounted.
*/
if ((cn = zfs_alloc(zhp->zfs_hdl,
sizeof (prop_changenode_t))) == NULL) {
zfs_close(temp);
changelist_free(clp);
return (NULL);
}
cn->cn_handle = temp;
cn->cn_mounted = (clp->cl_gflags & CL_GATHER_MOUNT_ALWAYS) ||
zfs_is_mounted(temp, NULL);
cn->cn_shared = zfs_is_shared(temp);
cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
cn->cn_needpost = 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 the target dataset to the end of the list.
* The list is not really unsorted. The list will be
* in reverse dataset name order. This is necessary
* when the original mountpoint is legacy or none.
*/
verify(uu_list_insert_after(clp->cl_list,
uu_list_last(clp->cl_list), cn) == 0);
}
/*
* If the mountpoint property was previously 'legacy', or 'none',
* record it as the behavior of changelist_postfix() will be different.
*/
if ((clp->cl_prop == ZFS_PROP_MOUNTPOINT) && legacy) {
/*
* do not automatically mount ex-legacy datasets if
* we specifically set canmount to noauto
*/
if (zfs_prop_get_int(zhp, ZFS_PROP_CANMOUNT) !=
ZFS_CANMOUNT_NOAUTO)
clp->cl_waslegacy = B_TRUE;
}
return (clp);
}
/*
* Given a ZFS handle and a property, construct a complete list of datasets
* that need to be modified as part of this process. For anything but the
* 'mountpoint' and 'sharenfs' properties, this just returns an empty list.
* Otherwise, we iterate over all children and look for any datasets that
* inherit the property. For each such dataset, we add it to the list and
* mark whether it was shared beforehand.
*/
prop_changelist_t *
changelist_gather(zfs_handle_t *zhp, zfs_prop_t prop, int flags)
{
prop_changelist_t *clp;
prop_changenode_t *cn;
zfs_handle_t *temp;
char property[ZFS_MAXPROPLEN];
uu_compare_fn_t *compare = NULL;
if ((clp = zfs_alloc(zhp->zfs_hdl, sizeof (prop_changelist_t))) == NULL)
return (NULL);
/*
* For mountpoint-related tasks, we want to sort everything by
* mountpoint, so that we mount and unmount them in the appropriate
* order, regardless of their position in the hierarchy.
*/
if (prop == ZFS_PROP_NAME || prop == ZFS_PROP_ZONED ||
prop == ZFS_PROP_MOUNTPOINT || prop == ZFS_PROP_SHARENFS) {
compare = compare_mountpoints;
clp->cl_sorted = B_TRUE;
}
clp->cl_pool = uu_list_pool_create("changelist_pool",
sizeof (prop_changenode_t),
offsetof(prop_changenode_t, cn_listnode),
compare, 0);
if (clp->cl_pool == NULL) {
assert(uu_error() == UU_ERROR_NO_MEMORY);
(void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
changelist_free(clp);
return (NULL);
}
clp->cl_list = uu_list_create(clp->cl_pool, NULL,
clp->cl_sorted ? UU_LIST_SORTED : 0);
clp->cl_flags = flags;
if (clp->cl_list == NULL) {
assert(uu_error() == UU_ERROR_NO_MEMORY);
(void) zfs_error(zhp->zfs_hdl, EZFS_NOMEM, "internal error");
changelist_free(clp);
return (NULL);
}
/*
* If this is a rename or the 'zoned' property, we pretend we're
* changing the mountpoint and flag it so we can catch all children in
* change_one().
*
* Flag cl_alldependents to catch all children plus the dependents
* (clones) that are not in the hierarchy.
*/
if (prop == ZFS_PROP_NAME) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
clp->cl_alldependents = B_TRUE;
} else if (prop == ZFS_PROP_ZONED) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
clp->cl_allchildren = B_TRUE;
} else if (prop == ZFS_PROP_CANMOUNT) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
} else if (prop == ZFS_PROP_VOLSIZE) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
} else if (prop == ZFS_PROP_VERSION) {
clp->cl_prop = ZFS_PROP_MOUNTPOINT;
} else {
clp->cl_prop = prop;
}
clp->cl_realprop = prop;
if (clp->cl_prop != ZFS_PROP_MOUNTPOINT &&
clp->cl_prop != ZFS_PROP_SHARENFS &&
clp->cl_prop != ZFS_PROP_SHAREISCSI)
return (clp);
if (clp->cl_alldependents) {
if (zfs_iter_dependents(zhp, B_TRUE, change_one, clp) != 0) {
changelist_free(clp);
return (NULL);
}
} else if (zfs_iter_children(zhp, change_one, clp) != 0) {
changelist_free(clp);
return (NULL);
}
/*
* We have to re-open ourselves because we auto-close all the handles
* and can't tell the difference.
*/
if ((temp = zfs_open(zhp->zfs_hdl, zfs_get_name(zhp),
ZFS_TYPE_ANY)) == NULL) {
changelist_free(clp);
return (NULL);
}
/*
* Always add ourself to the list. We add ourselves to the end so that
* we're the last to be unmounted.
*/
if ((cn = zfs_alloc(zhp->zfs_hdl,
sizeof (prop_changenode_t))) == NULL) {
zfs_close(temp);
changelist_free(clp);
return (NULL);
}
cn->cn_handle = temp;
cn->cn_mounted = zfs_is_mounted(temp, NULL);
cn->cn_shared = zfs_is_shared(temp);
#ifndef __APPLE__
cn->cn_zoned = zfs_prop_get_int(zhp, ZFS_PROP_ZONED);
#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 {
verify(uu_list_insert_after(clp->cl_list,
uu_list_last(clp->cl_list), cn) == 0);
}
/*
* If the mountpoint property was previously 'legacy', or 'none',
* record it as the behavior of changelist_postfix() will be different.
*/
if ((clp->cl_prop == ZFS_PROP_MOUNTPOINT) &&
(zfs_prop_get(zhp, prop, property, sizeof (property),
NULL, NULL, 0, B_FALSE) == 0 &&
(strcmp(property, "legacy") == 0 || strcmp(property, "none") == 0)))
clp->cl_waslegacy = B_TRUE;
return (clp);
}
/*
* Registers the attributes of a running method passed as arguments so that
* the method's termination is noticed and any further processing of the
* associated instance is carried out. The function also sets up any
* necessary timers so we can detect hung methods.
* Returns -1 if either it failed to open the /proc psinfo file which is used
* to monitor the method process, it failed to setup a required timer or
* memory allocation failed; else 0.
*/
int
register_method(instance_t *ins, pid_t pid, ctid_t cid, instance_method_t mthd,
char *proto_name)
{
char path[MAXPATHLEN];
int fd;
method_el_t *me;
/* open /proc psinfo file of process to listen for POLLHUP events on */
(void) snprintf(path, sizeof (path), "/proc/%u/psinfo", pid);
for (;;) {
if ((fd = open(path, O_RDONLY)) >= 0) {
break;
} else if (errno != EINTR) {
/*
* Don't output an error for ENOENT; we get this
* if a method has gone away whilst we were stopped,
* and we're now trying to re-listen for it.
*/
if (errno != ENOENT) {
error_msg(gettext("Failed to open %s: %s"),
path, strerror(errno));
}
return (-1);
}
}
/* add method record to in-memory list */
if ((me = calloc(1, sizeof (method_el_t))) == NULL) {
error_msg(strerror(errno));
(void) close(fd);
return (-1);
}
me->fd = fd;
me->inst = (instance_t *)ins;
me->method = mthd;
me->pid = pid;
me->cid = cid;
if (proto_name != NULL) {
if ((me->proto_name = strdup(proto_name)) == NULL) {
error_msg(strerror(errno));
free(me);
(void) close(fd);
return (-1);
}
} else
me->proto_name = NULL;
/* register a timeout for the method, if required */
if (mthd != IM_START) {
method_info_t *mi = ins->config->methods[mthd];
if (mi->timeout > 0) {
assert(ins->timer_id == -1);
ins->timer_id = iu_schedule_timer(timer_queue,
mi->timeout, method_timeout, me);
if (ins->timer_id == -1) {
error_msg(gettext(
"Failed to schedule method timeout"));
if (me->proto_name != NULL)
free(me->proto_name);
free(me);
(void) close(fd);
return (-1);
}
}
}
/*
* Add fd of psinfo file to poll set, but pass 0 for events to
* poll for, so we should only get a POLLHUP event on the fd.
*/
if (set_pollfd(fd, 0) == -1) {
cancel_inst_timer(ins);
if (me->proto_name != NULL)
free(me->proto_name);
free(me);
(void) close(fd);
return (-1);
}
uu_list_node_init(me, &me->link, method_pool);
(void) uu_list_insert_after(method_list, NULL, me);
return (0);
}