tgt_node_t *
tgt_node_dup(tgt_node_t *n)
{
tgt_node_t *d = node_alloc();
tgt_node_t *c;
if (d == NULL)
return (NULL);
if (node_name(d, (xmlChar *)n->x_name) == False)
return (NULL);
if (n->x_value && (node_value(d, (xmlChar *)n->x_value, True) == False))
return (NULL);
for (c = n->x_child; c; c = c->x_sibling)
(void) tgt_node_add(d, tgt_node_dup(c));
for (c = n->x_attr; c; c = c->x_sibling)
(void) tgt_node_add_attr(d, tgt_node_dup(c));
return (d);
}
void
tgt_node_replace(tgt_node_t *parent, tgt_node_t *child, match_type_t m)
{
tgt_node_t *s;
tgt_node_t *c;
if ((parent == NULL) || (child == NULL))
return;
for (s = parent->x_child; s; s = s->x_sibling) {
/*
* See if the new child node matches one of the children
* in the parent.
*/
if ((strcmp(s->x_name, child->x_name) == 0) &&
((m == MatchName) || (strcmp(s->x_value,
child->x_value) == 0))) {
/*
* We have a match. Now save the values of the new
* child in this current node.
*/
free(s->x_name);
free(s->x_value);
s->x_name = strdup(child->x_name);
s->x_value = strdup(child->x_value);
if (s->x_child) {
tgt_node_free(s->x_child);
s->x_child = NULL;
}
for (c = child->x_child; c; c = c->x_sibling)
(void) tgt_node_add(s, tgt_node_dup(c));
break;
}
}
if (s == NULL) {
/*
* Never found the child so add it
*/
(void) tgt_node_add(parent, tgt_node_dup(child));
}
}
/*
* modify_zfs -- test for the existence of a certain dataset being shared
*
* Called when someone uses the iscsitgt_is_shared() function from libiscsitgt.
* All that
*/
static char *
modify_zfs(tgt_node_t *x, ucred_t *cred)
{
char *msg = NULL;
char *dataset = NULL;
char *prop;
char *m;
tgt_node_t *n = NULL;
tgt_node_t *t = NULL;
tgt_node_t *list = NULL;
tgt_node_t *c1, *c2;
Boolean_t change_made = False;
uint64_t size;
int status;
int val;
char *tru = "true";
(void) pthread_rwlock_wrlock(&targ_config_mutex);
if (tgt_find_value_str(x, XML_ELEMENT_NAME, &dataset) == False) {
xml_rtn_msg(&msg, ERR_SYNTAX_MISSING_NAME);
goto error;
}
/*
* Validate request
*/
if (tgt_find_value_str(x, XML_ELEMENT_VALIDATE, &tru)) {
(void) pthread_rwlock_unlock(&targ_config_mutex);
if (tru)
free(tru);
free(dataset);
return (validate_zfs_iscsitgt(x));
}
/*
* Check for existance of ZFS shareiscsi properties
*/
status = get_zfs_shareiscsi(dataset, &n, &size, cred);
if ((status != ERR_SUCCESS) && (status != ERR_NULL_XML_MESSAGE)) {
xml_rtn_msg(&msg, ERR_TARG_NOT_FOUND);
goto error;
}
while ((t = tgt_node_next_child(targets_config, XML_ELEMENT_TARG, t))
!= NULL) {
if (strcmp(t->x_value, dataset) == 0)
break;
}
if (t == NULL) {
xml_rtn_msg(&msg, ERR_TARG_NOT_FOUND);
goto error;
}
if (tgt_find_value_str(x, XML_ELEMENT_TPGT, &prop) == True) {
if (prop == NULL) {
xml_rtn_msg(&msg, ERR_SYNTAX_EMPTY_TPGT);
goto error;
}
/*
* Validate that the Target Portal Group Tag is reasonable.
*/
val = strtoll(prop, &m, 0);
if ((val < TPGT_MIN) || (val > TPGT_MAX) ||
((m != NULL) && (*m != '\0'))) {
xml_rtn_msg(&msg, ERR_INVALID_TPGT);
goto error;
}
if ((c1 = tgt_node_alloc(XML_ELEMENT_TPGT, String, prop)) ==
NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
/*
* Due to the fact that the targets_config differs from the
* ZVOL properties stored in zfs_shareiscsi, two lists need to
* be updated
*/
c2 = tgt_node_dup(c1);
if ((list = tgt_node_next(t, XML_ELEMENT_TPGTLIST, NULL))
!= NULL) {
/*
* tgt_node_replace will duplicate the child node
* tgt_node_add which is used below just links it
* into the tree.
*/
tgt_node_replace(list, c1, MatchBoth);
tgt_node_free(c1);
} else {
list = tgt_node_alloc(XML_ELEMENT_TPGTLIST, String, "");
if (list == NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
tgt_node_add(list, c1);
tgt_node_add(t, list);
}
if ((list = tgt_node_next(n, XML_ELEMENT_TPGTLIST, NULL))
!= NULL) {
/*
* tgt_node_replace will duplicate the child node
* tgt_node_add which is used below just links it
* into the tree.
*/
tgt_node_replace(list, c2, MatchBoth);
tgt_node_free(c2);
} else {
list = tgt_node_alloc(XML_ELEMENT_TPGTLIST, String, "");
if (list == NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
tgt_node_add(list, c2);
tgt_node_add(n, list);
}
change_made = True;
}
if (tgt_find_value_str(x, XML_ELEMENT_ACL, &prop) == True) {
if (prop == NULL) {
xml_rtn_msg(&msg, ERR_SYNTAX_EMPTY_ACL);
goto error;
}
c1 = tgt_node_alloc(XML_ELEMENT_INIT, String, prop);
if (c1 == NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
/*
* Due to the fact that the targets_config differs from the
* ZVOL properties stored in zfs_shareiscsi, two lists need to
* be updated
*/
c2 = tgt_node_dup(c1);
if ((list = tgt_node_next(t, XML_ELEMENT_ACLLIST, NULL))
!= NULL) {
/*
* tgt_node_replace will duplicate the child node
* tgt_node_add which is used below just links it
* into the tree.
*/
tgt_node_replace(list, c1, MatchBoth);
tgt_node_free(c1);
} else {
list = tgt_node_alloc(XML_ELEMENT_ACLLIST, String, "");
if (list == NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
tgt_node_add(list, c1);
tgt_node_add(t, list);
}
if ((list = tgt_node_next(n, XML_ELEMENT_ACLLIST, NULL))
!= NULL) {
/*
* tgt_node_replace will duplicate the child node
* tgt_node_add which is used below just links it
* into the tree.
*/
tgt_node_replace(list, c2, MatchBoth);
tgt_node_free(c2);
} else {
list = tgt_node_alloc(XML_ELEMENT_ACLLIST, String, "");
if (list == NULL) {
xml_rtn_msg(&msg, ERR_NO_MEM);
goto error;
}
tgt_node_add(list, c2);
tgt_node_add(n, list);
}
change_made = True;
}
if (change_made == True) {
status = put_zfs_shareiscsi(dataset, n);
if (status != ERR_SUCCESS) {
xml_rtn_msg(&msg, status);
goto error;
} else {
xml_rtn_msg(&msg, ERR_SUCCESS);
}
} else {
xml_rtn_msg(&msg, ERR_SUCCESS);
}
error:
if (n)
tgt_node_free(n);
if (dataset)
free(dataset);
(void) pthread_rwlock_unlock(&targ_config_mutex);
return (msg);
}
/*
* this function tries to convert configuration in files into scf
* it loads xml conf into node tree then dump them to scf with
* mgmt_config_save2scf()
* this function has 3 return values:
* CONVERT_OK: successfully converted
* CONVERT_INIT_NEW: configuration files dont exist, created a new scf entry
* CONVERT_FAIL: some error occurred in conversion and no scf entry created.
* In this case, user have to check files manually and try
* conversion again.
*/
convert_ret_t
mgmt_convert_conf()
{
targ_scf_t *h = NULL;
xmlTextReaderPtr r;
convert_ret_t ret = CONVERT_FAIL;
int xml_fd = -1;
int n;
tgt_node_t *node = NULL;
tgt_node_t *next = NULL;
char path[MAXPATHLEN];
char *target = NULL;
h = mgmt_handle_init();
if (h == NULL)
return (CONVERT_FAIL);
/* check main config in pgroup iscsitgt */
if (scf_service_get_pg(h->t_service, "iscsitgt", h->t_pg) == 0) {
ret = CONVERT_OK;
goto done;
}
/* check the conf files */
if (access(config_file, R_OK) != 0) {
/*
* if there is no configuration file, initialize
* an empty scf entry
*/
if (mgmt_transaction_start(h, "iscsitgt", "basic") == True) {
ret = CONVERT_INIT_NEW;
node = tgt_node_alloc(XML_ELEMENT_VERS, String, "1.0");
new_property(h, node);
tgt_node_free(node);
/* "daemonize" is set to true by default */
node = tgt_node_alloc(XML_ELEMENT_DBGDAEMON, String,
"true");
new_property(h, node);
tgt_node_free(node);
node = NULL;
node = tgt_node_alloc(ISCSI_MODIFY_AUTHNAME, String,
ISCSI_AUTH_MODIFY);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_VALUE_AUTHNAME, String,
ISCSI_AUTH_VALUE);
new_property(h, node);
tgt_node_free(node);
mgmt_transaction_end(h);
} else {
syslog(LOG_ERR, "Creating empty entry failed");
ret = CONVERT_FAIL;
goto done;
}
if (mgmt_transaction_start(h, "passwords", "application") ==
True) {
node = tgt_node_alloc(ISCSI_READ_AUTHNAME, String,
ISCSI_AUTH_READ);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_MODIFY_AUTHNAME, String,
ISCSI_AUTH_MODIFY);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_VALUE_AUTHNAME, String,
ISCSI_AUTH_VALUE);
new_property(h, node);
tgt_node_free(node);
mgmt_transaction_end(h);
} else {
syslog(LOG_ERR, "Creating empty entry failed");
ret = CONVERT_FAIL;
}
goto done;
}
if ((xml_fd = open(config_file, O_RDONLY)) >= 0)
r = (xmlTextReaderPtr)xmlReaderForFd(xml_fd, NULL, NULL, 0);
if (r != NULL) {
n = xmlTextReaderRead(r);
while (n == 1) {
if (tgt_node_process(r, &node) == False) {
break;
}
n = xmlTextReaderRead(r);
}
if (n < 0) {
syslog(LOG_ERR, "Parsing main config failed");
ret = CONVERT_FAIL;
goto done;
}
main_config = node;
(void) tgt_find_value_str(node, XML_ELEMENT_BASEDIR,
&target_basedir);
if (target_basedir == NULL)
target_basedir = strdup(DEFAULT_TARGET_BASEDIR);
/* Now convert targets' config if possible */
if (xml_fd != -1)
(void) close(xml_fd);
xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
r = NULL;
xml_fd = -1;
node = NULL;
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, "config.xml");
if ((xml_fd = open(path, O_RDONLY)) >= 0)
r = (xmlTextReaderPtr)xmlReaderForFd(xml_fd,
NULL, NULL, 0);
if (r != NULL) {
n = xmlTextReaderRead(r);
while (n == 1) {
if (tgt_node_process(r, &node) == False) {
break;
}
n = xmlTextReaderRead(r);
}
if (n < 0) {
syslog(LOG_ERR, "Parsing target conf failed");
ret = CONVERT_FAIL;
goto done;
}
/* now combine main_config and node */
if (node) {
next = NULL;
while ((next = tgt_node_next(node,
XML_ELEMENT_TARG, next)) != NULL) {
tgt_node_add(main_config,
tgt_node_dup(next));
}
tgt_node_free(node);
}
if (mgmt_config_save2scf() != True) {
syslog(LOG_ERR, "Converting config failed");
if (xml_fd != -1)
(void) close(xml_fd);
xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
ret = CONVERT_FAIL;
goto done;
}
/* Copy files into backup dir */
(void) snprintf(path, sizeof (path), "%s/backup",
target_basedir);
if ((mkdir(path, 0755) == -1) && (errno != EEXIST)) {
syslog(LOG_ERR, "Creating backup dir failed");
ret = CONVERT_FAIL;
goto done;
}
backup(config_file, NULL);
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, "config.xml");
backup(path, NULL);
while ((next = tgt_node_next(main_config,
XML_ELEMENT_TARG, next)) != NULL) {
if (tgt_find_value_str(next, XML_ELEMENT_INAME,
&target) == False) {
continue;
}
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, target);
if (mgmt_convert_param(path, next)
!= True) {
ret = CONVERT_FAIL;
goto done;
}
free(target);
}
ret = CONVERT_OK;
syslog(LOG_NOTICE, "Conversion succeeded");
xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
} else {
syslog(LOG_ERR, "Reading targets config failed");
ret = CONVERT_FAIL;
goto done;
}
} else {
syslog(LOG_ERR, "Reading main config failed");
ret = CONVERT_FAIL;
goto done;
}
done:
if (xml_fd != -1)
(void) close(xml_fd);
mgmt_handle_fini(h);
return (ret);
}
/*
* Convert legacy (XML) configuration files into an equivalent SCF
* representation.
*
* Read the XML from disk, translate the XML into a tree of nodes of
* type tgt_node_t, and write the in-memory tree to SCF's persistent
* data-store using mgmt_config_save2scf().
*
* Return Values:
* CONVERT_OK: successfully converted
* CONVERT_INIT_NEW: configuration files don't exist; created an SCF entry
* CONVERT_FAIL: some conversion error occurred; no SCF entry created.
* In this case, user has to manually check files and try
* conversion again.
*/
convert_ret_t
mgmt_convert_conf()
{
targ_scf_t *h = NULL;
xmlTextReaderPtr r;
convert_ret_t ret = CONVERT_FAIL;
int xml_fd = -1;
int n;
tgt_node_t *node = NULL;
tgt_node_t *next = NULL;
char path[MAXPATHLEN];
char *target = NULL;
h = mgmt_handle_init();
if (h == NULL)
return (CONVERT_FAIL);
/*
* Check if the "iscsitgt" PropertyGroup has already been added
* to the "iscsitgt" SMF Service. If so, then we have already
* converted the legacy configuration files (and there is no work
* to do).
*/
if (scf_service_get_pg(h->t_service, "iscsitgt", h->t_pg) == 0) {
ret = CONVERT_OK;
goto done;
}
if (access(config_file, R_OK) != 0) {
/*
* then the Main Config file is not present; initialize
* SCF Properties to default values.
*/
if (mgmt_transaction_start(h, "iscsitgt", "basic") == True) {
ret = CONVERT_INIT_NEW;
node = tgt_node_alloc(XML_ELEMENT_VERS, String, "1.0");
new_property(h, node);
tgt_node_free(node);
/* "daemonize" is set to true by default */
node = tgt_node_alloc(XML_ELEMENT_DBGDAEMON, String,
"true");
new_property(h, node);
tgt_node_free(node);
node = NULL;
node = tgt_node_alloc(ISCSI_MODIFY_AUTHNAME, String,
ISCSI_AUTH_MODIFY);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_VALUE_AUTHNAME, String,
ISCSI_AUTH_VALUE);
new_property(h, node);
tgt_node_free(node);
(void) mgmt_transaction_end(h);
} else {
syslog(LOG_ERR, "Creating empty entry failed");
ret = CONVERT_FAIL;
goto done;
}
if (mgmt_transaction_start(h, "passwords", "application") ==
True) {
node = tgt_node_alloc(ISCSI_READ_AUTHNAME, String,
ISCSI_AUTH_READ);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_MODIFY_AUTHNAME, String,
ISCSI_AUTH_MODIFY);
new_property(h, node);
tgt_node_free(node);
node = tgt_node_alloc(ISCSI_VALUE_AUTHNAME, String,
ISCSI_AUTH_VALUE);
new_property(h, node);
tgt_node_free(node);
(void) mgmt_transaction_end(h);
} else {
syslog(LOG_ERR, "Creating empty entry failed");
ret = CONVERT_FAIL;
}
goto done;
}
if ((xml_fd = open(config_file, O_RDONLY)) >= 0)
r = (xmlTextReaderPtr)xmlReaderForFd(xml_fd, NULL, NULL, 0);
if (r != NULL) {
int is_target_config;
n = xmlTextReaderRead(r);
while (n == 1) {
if (tgt_node_process(r, &node) == False) {
break;
}
n = xmlTextReaderRead(r);
}
if (n < 0) {
syslog(LOG_ERR, "Parsing main config failed");
ret = CONVERT_FAIL;
goto done;
}
main_config = node;
/*
* Initialize the Base Directory (global) variable by
* using the value specified in the XML_ELEMENT_BASEDIR
* XML tag. If a tag is not specified, use a default.
*/
(void) tgt_find_value_str(node, XML_ELEMENT_BASEDIR,
&target_basedir);
if (target_basedir == NULL)
target_basedir = strdup(DEFAULT_TARGET_BASEDIR);
if (xml_fd != -1) {
(void) close(xml_fd);
xml_fd = -1;
}
(void) xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
/*
* If a Target Config file is present, read and translate
* its XML representation into a tree of tgt_node_t.
* Merge that tree with the tree of tgt_node_t rooted at
* 'main_config'. The merged tree will then be archived
* using an SCF representation.
*/
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, "config.xml");
if ((xml_fd = open(path, O_RDONLY)) >= 0) {
is_target_config = 1;
r = (xmlTextReaderPtr)xmlReaderForFd(xml_fd,
NULL, NULL, 0);
} else {
is_target_config = 0;
r = NULL;
}
if (r != NULL) {
/* then the Target Config file is available. */
node = NULL;
/*
* Create a tree of tgt_node_t rooted at 'node' by
* processing each XML Tag in the file.
*/
n = xmlTextReaderRead(r);
while (n == 1) {
if (tgt_node_process(r, &node) == False) {
break;
}
n = xmlTextReaderRead(r);
}
if (n < 0) {
syslog(LOG_ERR, "Parsing target conf failed");
ret = CONVERT_FAIL;
goto done;
}
/*
* Merge the tree at 'node' into the tree rooted at
* 'main_config'.
*/
if (node != NULL) {
next = NULL;
while ((next = tgt_node_next(node,
XML_ELEMENT_TARG, next)) != NULL) {
tgt_node_add(main_config,
tgt_node_dup(next));
}
tgt_node_free(node);
}
}
/*
* Iterate over the in-memory tree rooted at 'main_config'
* and write a representation of the appropriate nodes to
* SCF's persistent data-store.
*/
if (mgmt_config_save2scf() != True) {
syslog(LOG_ERR, "Converting config failed");
if (xml_fd != -1) {
(void) close(xml_fd);
xml_fd = -1;
}
(void) xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
ret = CONVERT_FAIL;
goto done;
}
/*
* Move the configuration files into a well-known backup
* directory. This allows a user to restore their
* configuration, if they choose.
*/
(void) snprintf(path, sizeof (path), "%s/backup",
target_basedir);
if ((mkdir(path, 0755) == -1) && (errno != EEXIST)) {
syslog(LOG_ERR, "Creating backup dir failed");
ret = CONVERT_FAIL;
goto done;
}
/* Save the Main Config file. */
backup(config_file, NULL);
/* Save the Target Config file, if it was present. */
if (is_target_config != 0) {
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, "config.xml");
backup(path, NULL);
}
/*
* For each tgt_node_t node in 'main_config' whose value is
* an iSCSI Name as defined in the RFC (3720) standard (eg,
* "iqn.1986..."), read its XML-encoded attributes from a
* flat-file and write an equivalent representation to SCF's
* data-store.
*/
while ((next = tgt_node_next(main_config,
XML_ELEMENT_TARG, next)) != NULL) {
if (tgt_find_value_str(next, XML_ELEMENT_INAME,
&target) == False) {
continue;
}
(void) snprintf(path, MAXPATHLEN, "%s/%s",
target_basedir, target);
if (mgmt_convert_param(path, next)
!= True) {
ret = CONVERT_FAIL;
goto done;
}
free(target);
}
ret = CONVERT_OK;
syslog(LOG_NOTICE, "Conversion succeeded");
(void) xmlTextReaderClose(r);
xmlFreeTextReader(r);
xmlCleanupParser();
} else {
syslog(LOG_ERR, "Reading main config failed");
ret = CONVERT_FAIL;
goto done;
}
done:
if (xml_fd != -1)
(void) close(xml_fd);
mgmt_handle_fini(h);
return (ret);
}
