/*
* Copyright (C) 2013, Trustees of Indiana University
*
- * Copyright (c) 2014, Intel Corporation.
+ * Copyright (c) 2017, Intel Corporation.
*
* Author: Joshua Walgenbach <jjw@iu.edu>
*/
#include <linux/module.h>
#include <linux/sort.h>
-#include <lnet/nidstr.h>
+#include <uapi/linux/lnet/nidstr.h>
#include <lustre_net.h>
#include <lustre_acl.h>
#include <lustre_eacl.h>
nm_member_reclassify_nodemap(nodemap);
up_read(&active_config->nmc_range_tree_lock);
- write_lock(&nodemap->nm_idmap_lock);
+ down_write(&nodemap->nm_idmap_lock);
idmap_delete_tree(nodemap);
- write_unlock(&nodemap->nm_idmap_lock);
+ up_write(&nodemap->nm_idmap_lock);
mutex_unlock(&active_config_lock);
* \param nid nid to classify
* \retval nodemap nodemap containing the nid
* \retval default_nodemap default nodemap
+ * \retval -EINVAL LO nid given without other local nid
*/
struct lu_nodemap *nodemap_classify_nid(lnet_nid_t nid)
{
struct lu_nid_range *range;
struct lu_nodemap *nodemap;
+ int rc;
+
+ ENTRY;
+
+ /* don't use 0@lo, use the first non-lo local NID instead */
+ if (LNET_NETTYP(LNET_NIDNET(nid)) == LOLND) {
+ struct lnet_process_id id;
+ int i = 0;
+
+ do {
+ rc = LNetGetId(i++, &id);
+ if (rc < 0)
+ RETURN(ERR_PTR(-EINVAL));
+ } while (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND);
+
+ nid = id.nid;
+ CDEBUG(D_INFO, "found nid %s\n", libcfs_nid2str(nid));
+ }
range = range_search(&active_config->nmc_range_tree, nid);
if (range != NULL)
LASSERT(nodemap != NULL);
nodemap_getref(nodemap);
- return nodemap;
+ RETURN(nodemap);
}
/**
* \param nid nid to add to the members
* \param exp obd_export structure for the connection
* that is being added
- * \retval -EINVAL export is NULL
+ * \retval -EINVAL export is NULL, or has invalid NID
* \retval -EEXIST export is already member of a nodemap
*/
int nodemap_add_member(lnet_nid_t nid, struct obd_export *exp)
{
struct lu_nodemap *nodemap;
- int rc;
+ int rc = 0;
ENTRY;
mutex_lock(&active_config_lock);
down_read(&active_config->nmc_range_tree_lock);
nodemap = nodemap_classify_nid(nid);
- rc = nm_member_add(nodemap, exp);
+
+ if (IS_ERR(nodemap)) {
+ CWARN("%s: error adding to nodemap, no valid NIDs found\n",
+ exp->exp_obd->obd_name);
+ rc = -EINVAL;
+ } else {
+ rc = nm_member_add(nodemap, exp);
+ }
up_read(&active_config->nmc_range_tree_lock);
mutex_unlock(&active_config_lock);
- nodemap_putref(nodemap);
+ if (!IS_ERR(nodemap))
+ nodemap_putref(nodemap);
RETURN(rc);
}
/**
* add an idmap to the proper nodemap trees
*
- * \param name name of nodemap
+ * \param nodemap nodemap to add idmap to
* \param id_type NODEMAP_UID or NODEMAP_GID
* \param map array[2] __u32 containing the map values
* map[0] is client id
* map[1] is the filesystem id
*
- * \retval 0 on success
+ * \retval 0 on success
+ * \retval < 0 if error occurs
*/
int nodemap_add_idmap_helper(struct lu_nodemap *nodemap,
enum nodemap_id_type id_type,
const __u32 map[2])
{
struct lu_idmap *idmap;
+ struct lu_idmap *temp;
int rc = 0;
idmap = idmap_create(map[0], map[1]);
if (idmap == NULL)
GOTO(out, rc = -ENOMEM);
- write_lock(&nodemap->nm_idmap_lock);
- idmap_insert(id_type, idmap, nodemap);
- write_unlock(&nodemap->nm_idmap_lock);
+ down_write(&nodemap->nm_idmap_lock);
+ temp = idmap_insert(id_type, idmap, nodemap);
+ /* If the new id_client or id_fs is matched, the old idmap and its
+ * index should be deleted according to its id_client before the new
+ * idmap is added again.
+ */
+ if (IS_ERR(temp))
+ GOTO(out_insert, rc = PTR_ERR(temp));
+ if (temp) {
+ __u32 del_map[2];
+
+ del_map[0] = temp->id_client;
+ idmap_delete(id_type, temp, nodemap);
+ rc = nodemap_idx_idmap_del(nodemap, id_type, del_map);
+ /* In case there is any corrupted idmap */
+ if (!rc || unlikely(rc == -ENOENT)) {
+ temp = idmap_insert(id_type, idmap, nodemap);
+ if (IS_ERR(temp))
+ rc = PTR_ERR(temp);
+ else if (!temp)
+ rc = 0;
+ else
+ rc = -EPERM;
+ }
+ }
+out_insert:
+ if (rc)
+ OBD_FREE_PTR(idmap);
+ up_write(&nodemap->nm_idmap_lock);
nm_member_revoke_locks(nodemap);
out:
struct lu_nodemap *nodemap = NULL;
int rc;
+ ENTRY;
+
mutex_lock(&active_config_lock);
nodemap = nodemap_lookup(name);
if (IS_ERR(nodemap)) {
nodemap_putref(nodemap);
out:
- return rc;
+ RETURN(rc);
}
EXPORT_SYMBOL(nodemap_add_idmap);
struct lu_idmap *idmap = NULL;
int rc = 0;
+ ENTRY;
+
mutex_lock(&active_config_lock);
nodemap = nodemap_lookup(name);
if (IS_ERR(nodemap)) {
if (is_default_nodemap(nodemap))
GOTO(out_putref, rc = -EINVAL);
- write_lock(&nodemap->nm_idmap_lock);
+ down_write(&nodemap->nm_idmap_lock);
idmap = idmap_search(nodemap, NODEMAP_CLIENT_TO_FS, id_type,
map[0]);
if (idmap == NULL) {
idmap_delete(id_type, idmap, nodemap);
rc = nodemap_idx_idmap_del(nodemap, id_type, map);
}
- write_unlock(&nodemap->nm_idmap_lock);
+ up_write(&nodemap->nm_idmap_lock);
out_putref:
mutex_unlock(&active_config_lock);
nodemap_putref(nodemap);
out:
- return rc;
+ RETURN(rc);
}
EXPORT_SYMBOL(nodemap_del_idmap);
* is, return 0. Otherwise, return the squash uid or gid.
*
* if the nodemap is configured to trusted the ids from the client system, just
- * return the passwd id without mapping.
+ * return the passed id without mapping.
*
* if by this point, we haven't returned and the nodemap in question is the
* default nodemap, return the squash uid or gid.
if (unlikely(nodemap == NULL))
goto out;
+ if (nodemap->nmf_map_uid_only && id_type == NODEMAP_GID)
+ goto out;
+
+ if (nodemap->nmf_map_gid_only && id_type == NODEMAP_UID)
+ goto out;
+
if (id == 0) {
if (nodemap->nmf_allow_root_access)
goto out;
if (is_default_nodemap(nodemap))
goto squash;
- read_lock(&nodemap->nm_idmap_lock);
+ down_read(&nodemap->nm_idmap_lock);
idmap = idmap_search(nodemap, tree_type, id_type, id);
if (idmap == NULL) {
- read_unlock(&nodemap->nm_idmap_lock);
+ up_read(&nodemap->nm_idmap_lock);
goto squash;
}
found_id = idmap->id_client;
else
found_id = idmap->id_fs;
- read_unlock(&nodemap->nm_idmap_lock);
+ up_read(&nodemap->nm_idmap_lock);
RETURN(found_id);
squash:
enum nodemap_tree_type tree_type)
{
posix_acl_xattr_header *header = buf;
- posix_acl_xattr_entry *entry = &header->a_entries[0];
+ posix_acl_xattr_entry *entry = GET_POSIX_ACL_XATTR_ENTRY(header);
posix_acl_xattr_entry *new_entry = entry;
posix_acl_xattr_entry *end;
int count;
+ ENTRY;
+
if (!nodemap_active)
- return size;
+ RETURN(size);
if (unlikely(nodemap == NULL))
- return size;
+ RETURN(size);
count = posix_acl_xattr_count(size);
if (count < 0)
- return -EINVAL;
+ RETURN(-EINVAL);
if (count == 0)
- return 0;
+ RETURN(0);
for (end = entry + count; entry != end; entry++) {
__u16 tag = le16_to_cpu(entry->e_tag);
new_entry++;
}
- return (void *)new_entry - (void *)header;
+ RETURN((void *)new_entry - (void *)header);
}
EXPORT_SYMBOL(nodemap_map_acl);
}
list_add(&range->rn_list, &nodemap->nm_ranges);
- nm_member_reclassify_nodemap(config->nmc_default_nodemap);
+
+ /* nodemaps have no members if they aren't on the active config */
+ if (config == active_config)
+ nm_member_reclassify_nodemap(config->nmc_default_nodemap);
+
up_write(&config->nmc_range_tree_lock);
/* if range_id is non-zero, we are loading from disk */
if (range_id == 0)
rc = nodemap_idx_range_add(range, nid);
- nm_member_revoke_locks(config->nmc_default_nodemap);
- nm_member_revoke_locks(nodemap);
+ if (config == active_config) {
+ nm_member_revoke_locks(config->nmc_default_nodemap);
+ nm_member_revoke_locks(nodemap);
+ }
out:
return rc;
/**
* delete a range
* \param name nodemap name
- * \param range_str string containing range
+ * \param nid nid range
* \retval 0 on success
*
* Delete range from global range tree, and remove it
up_write(&active_config->nmc_range_tree_lock);
GOTO(out_putref, rc = -EINVAL);
}
+ if (range->rn_nodemap != nodemap) {
+ up_write(&active_config->nmc_range_tree_lock);
+ GOTO(out_putref, rc = -EINVAL);
+ }
rc = nodemap_idx_range_del(range);
range_delete(&active_config->nmc_range_tree, range);
nm_member_reclassify_nodemap(nodemap);
{
int rc = 0;
- /* we allow fileset = "" which means clear fileset info */
- if (fileset == NULL || (fileset[0] != 0 && fileset[0] != '/'))
+ /* Allow 'fileset=clear' in addition to 'fileset=""' to clear fileset
+ * because either command 'lctl set_param -P *.*.fileset=""' or
+ * 'lctl nodemap_set_fileset --fileset ""' can only work correctly
+ * on MGS, while on other servers, both commands will invoke upcall
+ * "/usr/sbin/lctl set_param nodemap.default.fileset=" by function
+ * process_param2_config(), which will cause "no value" error and
+ * won't clear fileset.
+ * 'fileset=""' is still kept for compatibility reason.
+ */
+ if (fileset == NULL)
+ rc = -EINVAL;
+ else if (fileset[0] == '\0' || strcmp(fileset, "clear") == 0)
+ nodemap->nm_fileset[0] = '\0';
+ else if (fileset[0] != '/')
rc = -EINVAL;
else if (strlcpy(nodemap->nm_fileset, fileset,
sizeof(nodemap->nm_fileset)) >=
GOTO(out, rc = PTR_ERR(nodemap));
}
- if (is_default_nodemap(nodemap))
- rc = -EINVAL;
- else
- rc = nodemap_set_fileset_helper(active_config, nodemap,
- fileset);
+ rc = nodemap_set_fileset_helper(active_config, nodemap, fileset);
mutex_unlock(&active_config_lock);
nodemap_putref(nodemap);
*/
char *nodemap_get_fileset(const struct lu_nodemap *nodemap)
{
- if (!nodemap_active || is_default_nodemap(nodemap))
+ if (!nodemap_active)
return NULL;
- else
- return (char *)nodemap->nm_fileset;
+
+ return (char *)nodemap->nm_fileset;
}
EXPORT_SYMBOL(nodemap_get_fileset);
*
* Creates an lu_nodemap structure and assigns sane default
* member values. If this is the default nodemap, the defaults
- * are the most restictive in xterms of mapping behavior. Otherwise
+ * are the most restrictive in terms of mapping behavior. Otherwise
* the default flags should be inherited from the default nodemap.
* The adds nodemap to nodemap_hash.
*
struct lu_nodemap *default_nodemap;
struct cfs_hash *hash = config->nmc_nodemap_hash;
int rc = 0;
+ ENTRY;
default_nodemap = config->nmc_default_nodemap;
INIT_LIST_HEAD(&nodemap->nm_member_list);
mutex_init(&nodemap->nm_member_list_lock);
- rwlock_init(&nodemap->nm_idmap_lock);
+ init_rwsem(&nodemap->nm_idmap_lock);
nodemap->nm_fs_to_client_uidmap = RB_ROOT;
nodemap->nm_client_to_fs_uidmap = RB_ROOT;
nodemap->nm_fs_to_client_gidmap = RB_ROOT;
if (is_default || default_nodemap == NULL) {
nodemap->nmf_trust_client_ids = 0;
nodemap->nmf_allow_root_access = 0;
+ nodemap->nmf_deny_unknown = 0;
+ nodemap->nmf_map_uid_only = 0;
+ nodemap->nmf_map_gid_only = 0;
+ nodemap->nmf_enable_audit = 1;
nodemap->nm_squash_uid = NODEMAP_NOBODY_UID;
nodemap->nm_squash_gid = NODEMAP_NOBODY_GID;
+ nodemap->nm_fileset[0] = '\0';
if (!is_default)
CWARN("adding nodemap '%s' to config without"
" default nodemap\n", nodemap->nm_name);
default_nodemap->nmf_trust_client_ids;
nodemap->nmf_allow_root_access =
default_nodemap->nmf_allow_root_access;
+ nodemap->nmf_deny_unknown =
+ default_nodemap->nmf_deny_unknown;
+ nodemap->nmf_map_uid_only =
+ default_nodemap->nmf_map_uid_only;
+ nodemap->nmf_map_gid_only =
+ default_nodemap->nmf_map_gid_only;
+ nodemap->nmf_enable_audit =
+ default_nodemap->nmf_enable_audit;
nodemap->nm_squash_uid = default_nodemap->nm_squash_uid;
nodemap->nm_squash_gid = default_nodemap->nm_squash_gid;
- nodemap->nm_fileset[0] = 0;
+ nodemap->nm_fileset[0] = '\0';
}
- return nodemap;
+ RETURN(nodemap);
out:
CERROR("cannot add nodemap: '%s': rc = %d\n", name, rc);
- return ERR_PTR(rc);
+ RETURN(ERR_PTR(rc));
+}
+
+/**
+ * Set the nmf_deny_unknown flag to true or false.
+ * \param name nodemap name
+ * \param deny_unknown if true, squashed users will get EACCES
+ * \retval 0 on success
+ *
+ */
+int nodemap_set_deny_unknown(const char *name, bool deny_unknown)
+{
+ struct lu_nodemap *nodemap = NULL;
+ int rc = 0;
+
+ mutex_lock(&active_config_lock);
+ nodemap = nodemap_lookup(name);
+ mutex_unlock(&active_config_lock);
+ if (IS_ERR(nodemap))
+ GOTO(out, rc = PTR_ERR(nodemap));
+
+ nodemap->nmf_deny_unknown = deny_unknown;
+ rc = nodemap_idx_nodemap_update(nodemap);
+
+ nm_member_revoke_locks(nodemap);
+ nodemap_putref(nodemap);
+out:
+ return rc;
}
+EXPORT_SYMBOL(nodemap_set_deny_unknown);
/**
- * update flag to turn on or off nodemap functions
+ * Set the nmf_allow_root_access flag to true or false.
* \param name nodemap name
- * \param admin_string string containing updated value
+ * \param allow_root if true, nodemap will not squash the root user
* \retval 0 on success
*
- * Update admin flag to turn on or off nodemap functions.
*/
int nodemap_set_allow_root(const char *name, bool allow_root)
{
EXPORT_SYMBOL(nodemap_set_allow_root);
/**
- * updated trust_client_ids flag for nodemap
+ * Set the nmf_trust_client_ids flag to true or false.
*
- * \param name nodemap name
- * \param trust_string new value for trust flag
+ * \param name nodemap name
+ * \param trust_client_ids if true, nodemap will not map its IDs
* \retval 0 on success
*
- * Update the trust_client_ids flag for a nodemap.
*/
int nodemap_set_trust_client_ids(const char *name, bool trust_client_ids)
{
}
EXPORT_SYMBOL(nodemap_set_trust_client_ids);
+int nodemap_set_mapping_mode(const char *name, enum nodemap_mapping_modes mode)
+{
+ struct lu_nodemap *nodemap = NULL;
+ int rc = 0;
+
+ mutex_lock(&active_config_lock);
+ nodemap = nodemap_lookup(name);
+ mutex_unlock(&active_config_lock);
+ if (IS_ERR(nodemap))
+ GOTO(out, rc = PTR_ERR(nodemap));
+
+ switch (mode) {
+ case NODEMAP_MAP_BOTH:
+ nodemap->nmf_map_uid_only = 0;
+ nodemap->nmf_map_gid_only = 0;
+ break;
+ case NODEMAP_MAP_UID_ONLY:
+ nodemap->nmf_map_uid_only = 1;
+ nodemap->nmf_map_gid_only = 0;
+ break;
+ case NODEMAP_MAP_GID_ONLY:
+ nodemap->nmf_map_uid_only = 0;
+ nodemap->nmf_map_gid_only = 1;
+ break;
+ default:
+ CWARN("cannot set unknown mapping mode, mode = %d\n", mode);
+ }
+ rc = nodemap_idx_nodemap_update(nodemap);
+
+ nm_member_revoke_locks(nodemap);
+ nodemap_putref(nodemap);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(nodemap_set_mapping_mode);
+
/**
- * update the squash_uid for a nodemap
+ * Update the squash_uid for a nodemap.
*
* \param name nodemap name
- * \param uid_string string containing new squash_uid value
+ * \param uid the new uid to squash unknown users to
* \retval 0 on success
*
* Update the squash_uid for a nodemap. The squash_uid is the uid
* Update the squash_gid for a nodemap.
*
* \param name nodemap name
- * \param gid_string string containing new squash_gid value
+ * \param gid the new gid to squash unknown gids to
* \retval 0 on success
*
* Update the squash_gid for a nodemap. The squash_uid is the gid
EXPORT_SYMBOL(nodemap_can_setquota);
/**
+ * Set the nmf_enable_audit flag to true or false.
+ * \param name nodemap name
+ * \param audit_mode if true, allow audit
+ * \retval 0 on success
+ *
+ */
+int nodemap_set_audit_mode(const char *name, bool enable_audit)
+{
+ struct lu_nodemap *nodemap = NULL;
+ int rc = 0;
+
+ mutex_lock(&active_config_lock);
+ nodemap = nodemap_lookup(name);
+ mutex_unlock(&active_config_lock);
+ if (IS_ERR(nodemap))
+ GOTO(out, rc = PTR_ERR(nodemap));
+
+ nodemap->nmf_enable_audit = enable_audit;
+ rc = nodemap_idx_nodemap_update(nodemap);
+
+ nm_member_revoke_locks(nodemap);
+ nodemap_putref(nodemap);
+out:
+ return rc;
+}
+EXPORT_SYMBOL(nodemap_set_audit_mode);
+
+
+/**
* Add a nodemap
*
* \param name name of nodemap
*/
list_for_each_entry_safe(nodemap, nodemap_temp, &nodemap_list_head,
nm_list) {
+ mutex_lock(&active_config_lock);
down_write(&config->nmc_range_tree_lock);
- /* move members to new config */
+ /* move members to new config, requires ac lock */
nm_member_reclassify_nodemap(nodemap);
list_for_each_entry_safe(range, range_temp, &nodemap->nm_ranges,
rn_list)
range_delete(&config->nmc_range_tree, range);
up_write(&config->nmc_range_tree_lock);
+ mutex_unlock(&active_config_lock);
+ /* putref must be outside of ac lock if nm could be destroyed */
nodemap_putref(nodemap);
}
OBD_FREE_PTR(config);
}
EXPORT_SYMBOL(nodemap_config_dealloc);
-static int nm_hash_list_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
- struct hlist_node *hnode,
- void *nodemap_list_head)
+/*
+ * callback for cfs_hash_for_each_safe used to convert a nodemap hash to a
+ * nodemap list, generally for locking purposes as a hash cb can't sleep.
+ */
+int nm_hash_list_cb(struct cfs_hash *hs, struct cfs_hash_bd *bd,
+ struct hlist_node *hnode,
+ void *nodemap_list_head)
{
struct lu_nodemap *nodemap;
struct nodemap_config *old_config = active_config;
struct lu_nodemap *nodemap;
struct lu_nodemap *tmp;
+ bool revoke_locks;
LIST_HEAD(nodemap_list_head);
ENTRY;
}
}
+ /*
+ * We only need to revoke locks if old nodemap was active, and new
+ * config is now nodemap inactive. nodemap_config_dealloc will
+ * reclassify exports, triggering a lock revoke if and only if new
+ * nodemap is active.
+ */
+ revoke_locks = !config->nmc_nodemap_is_active && nodemap_active;
+
/* if new config is inactive, deactivate live config before switching */
if (!config->nmc_nodemap_is_active)
nodemap_active = false;
if (old_config != NULL)
nodemap_config_dealloc(old_config);
- nm_member_revoke_all();
+ if (revoke_locks)
+ nm_member_revoke_all();
EXIT;
}
/* revoke_locks sleeps, so can't call in cfs hash cb */
list_for_each_entry_safe(nodemap, tmp, &nodemap_list_head, nm_list)
- nm_member_revoke_locks(nodemap);
+ nm_member_revoke_locks_always(nodemap);
mutex_unlock(&active_config_lock);
}
up_read(&active_config->nmc_range_tree_lock);
mutex_unlock(&active_config_lock);
+ if (IS_ERR(nodemap))
+ return;
+
strncpy(name_buf, nodemap->nm_name, name_len);
if (name_len > 0)
name_buf[name_len - 1] = '\0';
EXPORT_SYMBOL(nodemap_test_nid);
/**
- * Returns the id mapping for a given nid/id pair. Useful for testing the
+ * Passes back the id mapping for a given nid/id pair. Useful for testing the
* nodemap configuration to make sure it is working as expected.
*
* \param nid nid to classify
* \param idtype uid or gid
* \param client_id id to map to fs
+ * \param fs_id_buf pointer to save mapped fs_id to
*
- * \retval the mapped fs_id of the given client_id
+ * \retval 0 success
+ * \retval -EINVAL invalid NID
*/
-__u32 nodemap_test_id(lnet_nid_t nid, enum nodemap_id_type idtype,
- __u32 client_id)
+int nodemap_test_id(lnet_nid_t nid, enum nodemap_id_type idtype,
+ __u32 client_id, __u32 *fs_id)
{
struct lu_nodemap *nodemap;
- __u32 fs_id;
mutex_lock(&active_config_lock);
down_read(&active_config->nmc_range_tree_lock);
up_read(&active_config->nmc_range_tree_lock);
mutex_unlock(&active_config_lock);
- fs_id = nodemap_map_id(nodemap, idtype, NODEMAP_CLIENT_TO_FS,
+ if (IS_ERR(nodemap))
+ return PTR_ERR(nodemap);
+
+ *fs_id = nodemap_map_id(nodemap, idtype, NODEMAP_CLIENT_TO_FS,
client_id);
nodemap_putref(nodemap);
- return fs_id;
+ return 0;
}
EXPORT_SYMBOL(nodemap_test_id);