diff --git a/lib/cib/cib_file.c b/lib/cib/cib_file.c
index 45400cdc9b..aa6afb2797 100644
--- a/lib/cib/cib_file.c
+++ b/lib/cib/cib_file.c
@@ -1,922 +1,921 @@
/*
* Original copyright 2004 International Business Machines
* Later changes copyright 2008-2023 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU Lesser General Public License
* version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <unistd.h>
#include <limits.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <pwd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <glib.h>
#include <crm/crm.h>
#include <crm/cib/internal.h>
#include <crm/msg_xml.h>
#include <crm/common/ipc.h>
#include <crm/common/xml.h>
#include <crm/common/xml_internal.h>
enum cib_file_flags {
cib_file_flag_dirty = (1 << 0),
cib_file_flag_live = (1 << 1),
};
typedef struct cib_file_opaque_s {
uint32_t flags; // Group of enum cib_file_flags
char *filename;
} cib_file_opaque_t;
struct cib_func_entry {
const char *op;
gboolean read_only;
cib_op_t fn;
};
static struct cib_func_entry cib_file_ops[] = {
{ PCMK__CIB_REQUEST_QUERY, TRUE, cib_process_query },
{ PCMK__CIB_REQUEST_MODIFY, FALSE, cib_process_modify },
{ PCMK__CIB_REQUEST_APPLY_PATCH, FALSE, cib_process_diff },
{ PCMK__CIB_REQUEST_BUMP, FALSE, cib_process_bump },
{ PCMK__CIB_REQUEST_REPLACE, FALSE, cib_process_replace },
{ PCMK__CIB_REQUEST_CREATE, FALSE, cib_process_create },
{ PCMK__CIB_REQUEST_DELETE, FALSE, cib_process_delete },
{ PCMK__CIB_REQUEST_ERASE, FALSE, cib_process_erase },
{ PCMK__CIB_REQUEST_UPGRADE, FALSE, cib_process_upgrade },
};
static xmlNode *in_mem_cib = NULL;
#define cib_set_file_flags(cibfile, flags_to_set) do { \
(cibfile)->flags = pcmk__set_flags_as(__func__, __LINE__, \
LOG_TRACE, "CIB file", \
cibfile->filename, \
(cibfile)->flags, \
(flags_to_set), \
#flags_to_set); \
} while (0)
#define cib_clear_file_flags(cibfile, flags_to_clear) do { \
(cibfile)->flags = pcmk__clear_flags_as(__func__, __LINE__, \
LOG_TRACE, "CIB file", \
cibfile->filename, \
(cibfile)->flags, \
(flags_to_clear), \
#flags_to_clear); \
} while (0)
-int cib_file_signon(cib_t * cib, const char *name, enum cib_conn_type type);
int cib_file_signoff(cib_t * cib);
int cib_file_free(cib_t * cib);
static int
cib_file_perform_op_delegate(cib_t *cib, const char *op, const char *host,
const char *section, xmlNode *data,
xmlNode **output_data, int call_options,
const char *user_name)
{
int rc = pcmk_ok;
char *effective_user = NULL;
gboolean query = FALSE;
gboolean changed = FALSE;
xmlNode *request = NULL;
xmlNode *output = NULL;
xmlNode *cib_diff = NULL;
xmlNode *result_cib = NULL;
cib_op_t *fn = NULL;
int lpc = 0;
static int max_msg_types = PCMK__NELEM(cib_file_ops);
cib_file_opaque_t *private = cib->variant_opaque;
crm_info("Handling %s operation for %s as %s",
(op? op : "invalid"), (section? section : "entire CIB"),
(user_name? user_name : "default user"));
cib__set_call_options(call_options, "file operation",
cib_no_mtime|cib_inhibit_bcast|cib_scope_local);
if (cib->state == cib_disconnected) {
return -ENOTCONN;
}
if (output_data != NULL) {
*output_data = NULL;
}
if (op == NULL) {
return -EINVAL;
}
for (lpc = 0; lpc < max_msg_types; lpc++) {
if (pcmk__str_eq(op, cib_file_ops[lpc].op, pcmk__str_casei)) {
fn = &(cib_file_ops[lpc].fn);
query = cib_file_ops[lpc].read_only;
break;
}
}
if (fn == NULL) {
return -EPROTONOSUPPORT;
}
cib->call_id++;
request = cib_create_op(cib->call_id, op, host, section, data, call_options,
user_name);
if(user_name) {
crm_xml_add(request, XML_ACL_TAG_USER, user_name);
}
/* Mirror the logic in cib_prepare_common() */
if (section != NULL && data != NULL && pcmk__str_eq(crm_element_name(data), XML_TAG_CIB, pcmk__str_none)) {
data = pcmk_find_cib_element(data, section);
}
rc = cib_perform_op(op, call_options, fn, query,
section, request, data, TRUE, &changed, in_mem_cib, &result_cib, &cib_diff,
&output);
free_xml(request);
if (rc == -pcmk_err_schema_validation) {
validate_xml_verbose(result_cib);
}
if (rc != pcmk_ok) {
free_xml(result_cib);
} else if (query == FALSE) {
pcmk__output_t *out = NULL;
rc = pcmk_rc2legacy(pcmk__log_output_new(&out));
CRM_CHECK(rc == pcmk_ok, goto done);
pcmk__output_set_log_level(out, LOG_DEBUG);
rc = out->message(out, "xml-patchset", cib_diff);
out->finish(out, pcmk_rc2exitc(rc), true, NULL);
pcmk__output_free(out);
rc = pcmk_ok;
free_xml(in_mem_cib);
in_mem_cib = result_cib;
cib_set_file_flags(private, cib_file_flag_dirty);
}
if (cib->op_callback != NULL) {
cib->op_callback(NULL, cib->call_id, rc, output);
}
if ((output_data != NULL) && (output != NULL)) {
*output_data = (output == in_mem_cib)? copy_xml(output) : output;
}
done:
free_xml(cib_diff);
if ((output_data == NULL) && (output != in_mem_cib)) {
/* Don't free output if we're still using it. (output_data != NULL)
* means we may have assigned *output_data = output above.
*/
free_xml(output);
}
free(effective_user);
return rc;
}
+/*!
+ * \internal
+ * \brief Read CIB from disk and validate it against XML schema
+ *
+ * \param[in] filename Name of file to read CIB from
+ *
+ * \return pcmk_ok on success,
+ * -ENXIO if file does not exist (or stat() otherwise fails), or
+ * -pcmk_err_schema_validation if XML doesn't parse or validate
+ * \note If filename is the live CIB, this will *not* verify its digest,
+ * though that functionality would be trivial to add here.
+ * Also, this will *not* verify that the file is writable,
+ * because some callers might not need to write.
+ */
+static int
+load_file_cib(const char *filename)
+{
+ struct stat buf;
+ xmlNode *root = NULL;
+
+ /* Ensure file is readable */
+ if (strcmp(filename, "-") && (stat(filename, &buf) < 0)) {
+ return -ENXIO;
+ }
+
+ /* Parse XML from file */
+ root = filename2xml(filename);
+ if (root == NULL) {
+ return -pcmk_err_schema_validation;
+ }
+
+ /* Add a status section if not already present */
+ if (find_xml_node(root, XML_CIB_TAG_STATUS, FALSE) == NULL) {
+ create_xml_node(root, XML_CIB_TAG_STATUS);
+ }
+
+ /* Validate XML against its specified schema */
+ if (validate_xml(root, NULL, TRUE) == FALSE) {
+ const char *schema = crm_element_value(root, XML_ATTR_VALIDATION);
+
+ crm_err("CIB does not validate against %s", schema);
+ free_xml(root);
+ return -pcmk_err_schema_validation;
+ }
+
+ /* Remember the parsed XML for later use */
+ in_mem_cib = root;
+ return pcmk_ok;
+}
+
+static int
+cib_file_signon(cib_t *cib, const char *name, enum cib_conn_type type)
+{
+ int rc = pcmk_ok;
+ cib_file_opaque_t *private = cib->variant_opaque;
+
+ if (private->filename == NULL) {
+ rc = -EINVAL;
+ } else {
+ rc = load_file_cib(private->filename);
+ }
+
+ if (rc == pcmk_ok) {
+ crm_debug("Opened connection to local file '%s' for %s",
+ private->filename, name);
+ cib->state = cib_connected_command;
+ cib->type = cib_command;
+
+ } else {
+ crm_info("Connection to local file '%s' for %s failed: %s\n",
+ private->filename, name, pcmk_strerror(rc));
+ }
+ return rc;
+}
+
static int
cib_file_inputfd(cib_t * cib)
{
return -EPROTONOSUPPORT;
}
static int
cib_file_set_connection_dnotify(cib_t * cib, void (*dnotify) (gpointer user_data))
{
return -EPROTONOSUPPORT;
}
static int
cib_file_register_notification(cib_t * cib, const char *callback, int enabled)
{
return -EPROTONOSUPPORT;
}
/*!
* \internal
* \brief Get the given CIB connection's unique client identifier
*
* \param[in] cib CIB connection
* \param[out] async_id If not \p NULL, where to store asynchronous client ID
* \param[out] sync_id If not \p NULL, where to store synchronous client ID
*
* \return Legacy Pacemaker return code (specifically, \p -EPROTONOSUPPORT)
*
* \note This is the \p cib_file variant implementation of
* \p cib_api_operations_t:client_id().
* \note A \p cib_file object doesn't connect to the CIB and is never assigned a
* client ID.
*/
static int
cib_file_client_id(const cib_t *cib, const char **async_id,
const char **sync_id)
{
if (async_id != NULL) {
*async_id = NULL;
}
if (sync_id != NULL) {
*sync_id = NULL;
}
return -EPROTONOSUPPORT;
}
/*!
* \internal
* \brief Compare the calculated digest of an XML tree against a signature file
*
* \param[in] root Root of XML tree to compare
* \param[in] sigfile Name of signature file containing digest to compare
*
* \return TRUE if digests match or signature file does not exist, else FALSE
*/
static gboolean
cib_file_verify_digest(xmlNode *root, const char *sigfile)
{
gboolean passed = FALSE;
char *expected;
int rc = pcmk__file_contents(sigfile, &expected);
switch (rc) {
case pcmk_rc_ok:
if (expected == NULL) {
crm_err("On-disk digest at %s is empty", sigfile);
return FALSE;
}
break;
case ENOENT:
crm_warn("No on-disk digest present at %s", sigfile);
return TRUE;
default:
crm_err("Could not read on-disk digest from %s: %s",
sigfile, pcmk_rc_str(rc));
return FALSE;
}
passed = pcmk__verify_digest(root, expected);
free(expected);
return passed;
}
/*!
* \internal
* \brief Read an XML tree from a file and verify its digest
*
* \param[in] filename Name of XML file to read
* \param[in] sigfile Name of signature file containing digest to compare
* \param[out] root If non-NULL, will be set to pointer to parsed XML tree
*
* \return 0 if file was successfully read, parsed and verified, otherwise:
* -errno on stat() failure,
* -pcmk_err_cib_corrupt if file size is 0 or XML is not parseable, or
* -pcmk_err_cib_modified if digests do not match
* \note If root is non-NULL, it is the caller's responsibility to free *root on
* successful return.
*/
int
cib_file_read_and_verify(const char *filename, const char *sigfile, xmlNode **root)
{
int s_res;
struct stat buf;
char *local_sigfile = NULL;
xmlNode *local_root = NULL;
CRM_ASSERT(filename != NULL);
if (root) {
*root = NULL;
}
/* Verify that file exists and its size is nonzero */
s_res = stat(filename, &buf);
if (s_res < 0) {
crm_perror(LOG_WARNING, "Could not verify cluster configuration file %s", filename);
return -errno;
} else if (buf.st_size == 0) {
crm_warn("Cluster configuration file %s is corrupt (size is zero)", filename);
return -pcmk_err_cib_corrupt;
}
/* Parse XML */
local_root = filename2xml(filename);
if (local_root == NULL) {
crm_warn("Cluster configuration file %s is corrupt (unparseable as XML)", filename);
return -pcmk_err_cib_corrupt;
}
/* If sigfile is not specified, use original file name plus .sig */
if (sigfile == NULL) {
sigfile = local_sigfile = crm_strdup_printf("%s.sig", filename);
}
/* Verify that digests match */
if (cib_file_verify_digest(local_root, sigfile) == FALSE) {
free(local_sigfile);
free_xml(local_root);
return -pcmk_err_cib_modified;
}
free(local_sigfile);
if (root) {
*root = local_root;
} else {
free_xml(local_root);
}
return pcmk_ok;
}
#define CIB_SERIES "cib"
#define CIB_SERIES_MAX 100
#define CIB_SERIES_BZIP FALSE /* Must be false because archived copies are
created with hard links
*/
#define CIB_LIVE_NAME CIB_SERIES ".xml"
/*!
* \internal
* \brief Check whether a file is the live CIB
*
* \param[in] filename Name of file to check
*
* \return TRUE if file exists and its real path is same as live CIB's
*/
static gboolean
cib_file_is_live(const char *filename)
{
gboolean same = FALSE;
if (filename != NULL) {
// Canonicalize file names for true comparison
char *real_filename = NULL;
if (pcmk__real_path(filename, &real_filename) == pcmk_rc_ok) {
char *real_livename = NULL;
if (pcmk__real_path(CRM_CONFIG_DIR "/" CIB_LIVE_NAME,
&real_livename) == pcmk_rc_ok) {
same = !strcmp(real_filename, real_livename);
free(real_livename);
}
free(real_filename);
}
}
return same;
}
/* cib_file_backup() and cib_file_write_with_digest() need to chown the
* written files only in limited circumstances, so these variables allow
* that to be indicated without affecting external callers
*/
static uid_t cib_file_owner = 0;
static uid_t cib_file_group = 0;
static gboolean cib_do_chown = FALSE;
/*!
* \internal
* \brief Back up a CIB
*
* \param[in] cib_dirname Directory containing CIB file and backups
* \param[in] cib_filename Name (relative to cib_dirname) of CIB file to back up
*
* \return 0 on success, -1 on error
*/
static int
cib_file_backup(const char *cib_dirname, const char *cib_filename)
{
int rc = 0;
unsigned int seq;
char *cib_path = crm_strdup_printf("%s/%s", cib_dirname, cib_filename);
char *cib_digest = crm_strdup_printf("%s.sig", cib_path);
char *backup_path;
char *backup_digest;
// Determine backup and digest file names
if (pcmk__read_series_sequence(cib_dirname, CIB_SERIES,
&seq) != pcmk_rc_ok) {
// @TODO maybe handle errors better ...
seq = 0;
}
backup_path = pcmk__series_filename(cib_dirname, CIB_SERIES, seq,
CIB_SERIES_BZIP);
backup_digest = crm_strdup_printf("%s.sig", backup_path);
/* Remove the old backups if they exist */
unlink(backup_path);
unlink(backup_digest);
/* Back up the CIB, by hard-linking it to the backup name */
if ((link(cib_path, backup_path) < 0) && (errno != ENOENT)) {
crm_perror(LOG_ERR, "Could not archive %s by linking to %s",
cib_path, backup_path);
rc = -1;
/* Back up the CIB signature similarly */
} else if ((link(cib_digest, backup_digest) < 0) && (errno != ENOENT)) {
crm_perror(LOG_ERR, "Could not archive %s by linking to %s",
cib_digest, backup_digest);
rc = -1;
/* Update the last counter and ensure everything is sync'd to media */
} else {
pcmk__write_series_sequence(cib_dirname, CIB_SERIES, ++seq,
CIB_SERIES_MAX);
if (cib_do_chown) {
int rc2;
if ((chown(backup_path, cib_file_owner, cib_file_group) < 0)
&& (errno != ENOENT)) {
crm_perror(LOG_ERR, "Could not set owner of %s", backup_path);
rc = -1;
}
if ((chown(backup_digest, cib_file_owner, cib_file_group) < 0)
&& (errno != ENOENT)) {
crm_perror(LOG_ERR, "Could not set owner of %s", backup_digest);
rc = -1;
}
rc2 = pcmk__chown_series_sequence(cib_dirname, CIB_SERIES,
cib_file_owner, cib_file_group);
if (rc2 != pcmk_rc_ok) {
crm_err("Could not set owner of sequence file in %s: %s",
cib_dirname, pcmk_rc_str(rc2));
rc = -1;
}
}
pcmk__sync_directory(cib_dirname);
crm_info("Archived previous version as %s", backup_path);
}
free(cib_path);
free(cib_digest);
free(backup_path);
free(backup_digest);
return rc;
}
/*!
* \internal
* \brief Prepare CIB XML to be written to disk
*
* Set num_updates to 0, set cib-last-written to the current timestamp,
* and strip out the status section.
*
* \param[in,out] root Root of CIB XML tree
*
* \return void
*/
static void
cib_file_prepare_xml(xmlNode *root)
{
xmlNode *cib_status_root = NULL;
/* Always write out with num_updates=0 and current last-written timestamp */
crm_xml_add(root, XML_ATTR_NUMUPDATES, "0");
pcmk__xe_add_last_written(root);
/* Delete status section before writing to file, because
* we discard it on startup anyway, and users get confused by it */
cib_status_root = find_xml_node(root, XML_CIB_TAG_STATUS, TRUE);
CRM_LOG_ASSERT(cib_status_root != NULL);
if (cib_status_root != NULL) {
free_xml(cib_status_root);
}
}
/*!
* \internal
* \brief Write CIB to disk, along with a signature file containing its digest
*
* \param[in,out] cib_root Root of XML tree to write
* \param[in] cib_dirname Directory containing CIB and signature files
* \param[in] cib_filename Name (relative to cib_dirname) of file to write
*
* \return pcmk_ok on success,
* pcmk_err_cib_modified if existing cib_filename doesn't match digest,
* pcmk_err_cib_backup if existing cib_filename couldn't be backed up,
* or pcmk_err_cib_save if new cib_filename couldn't be saved
*/
int
cib_file_write_with_digest(xmlNode *cib_root, const char *cib_dirname,
const char *cib_filename)
{
int exit_rc = pcmk_ok;
int rc, fd;
char *digest = NULL;
/* Detect CIB version for diagnostic purposes */
const char *epoch = crm_element_value(cib_root, XML_ATTR_GENERATION);
const char *admin_epoch = crm_element_value(cib_root,
XML_ATTR_GENERATION_ADMIN);
/* Determine full CIB and signature pathnames */
char *cib_path = crm_strdup_printf("%s/%s", cib_dirname, cib_filename);
char *digest_path = crm_strdup_printf("%s.sig", cib_path);
/* Create temporary file name patterns for writing out CIB and signature */
char *tmp_cib = crm_strdup_printf("%s/cib.XXXXXX", cib_dirname);
char *tmp_digest = crm_strdup_printf("%s/cib.XXXXXX", cib_dirname);
CRM_ASSERT((cib_path != NULL) && (digest_path != NULL)
&& (tmp_cib != NULL) && (tmp_digest != NULL));
/* Ensure the admin didn't modify the existing CIB underneath us */
crm_trace("Reading cluster configuration file %s", cib_path);
rc = cib_file_read_and_verify(cib_path, NULL, NULL);
if ((rc != pcmk_ok) && (rc != -ENOENT)) {
crm_err("%s was manually modified while the cluster was active!",
cib_path);
exit_rc = pcmk_err_cib_modified;
goto cleanup;
}
/* Back up the existing CIB */
if (cib_file_backup(cib_dirname, cib_filename) < 0) {
exit_rc = pcmk_err_cib_backup;
goto cleanup;
}
crm_debug("Writing CIB to disk");
umask(S_IWGRP | S_IWOTH | S_IROTH);
cib_file_prepare_xml(cib_root);
/* Write the CIB to a temporary file, so we can deploy (near) atomically */
fd = mkstemp(tmp_cib);
if (fd < 0) {
crm_perror(LOG_ERR, "Couldn't open temporary file %s for writing CIB",
tmp_cib);
exit_rc = pcmk_err_cib_save;
goto cleanup;
}
/* Protect the temporary file */
if (fchmod(fd, S_IRUSR | S_IWUSR) < 0) {
crm_perror(LOG_ERR, "Couldn't protect temporary file %s for writing CIB",
tmp_cib);
exit_rc = pcmk_err_cib_save;
goto cleanup;
}
if (cib_do_chown && (fchown(fd, cib_file_owner, cib_file_group) < 0)) {
crm_perror(LOG_ERR, "Couldn't protect temporary file %s for writing CIB",
tmp_cib);
exit_rc = pcmk_err_cib_save;
goto cleanup;
}
/* Write out the CIB */
if (write_xml_fd(cib_root, tmp_cib, fd, FALSE) <= 0) {
crm_err("Changes couldn't be written to %s", tmp_cib);
exit_rc = pcmk_err_cib_save;
goto cleanup;
}
/* Calculate CIB digest */
digest = calculate_on_disk_digest(cib_root);
CRM_ASSERT(digest != NULL);
crm_info("Wrote version %s.%s.0 of the CIB to disk (digest: %s)",
(admin_epoch ? admin_epoch : "0"), (epoch ? epoch : "0"), digest);
/* Write the CIB digest to a temporary file */
fd = mkstemp(tmp_digest);
if (fd < 0) {
crm_perror(LOG_ERR, "Could not create temporary file for CIB digest");
exit_rc = pcmk_err_cib_save;
goto cleanup;
}
if (cib_do_chown && (fchown(fd, cib_file_owner, cib_file_group) < 0)) {
crm_perror(LOG_ERR, "Couldn't protect temporary file %s for writing CIB",
tmp_cib);
exit_rc = pcmk_err_cib_save;
close(fd);
goto cleanup;
}
rc = pcmk__write_sync(fd, digest);
if (rc != pcmk_rc_ok) {
crm_err("Could not write digest to %s: %s",
tmp_digest, pcmk_rc_str(rc));
exit_rc = pcmk_err_cib_save;
close(fd);
goto cleanup;
}
close(fd);
crm_debug("Wrote digest %s to disk", digest);
/* Verify that what we wrote is sane */
crm_info("Reading cluster configuration file %s (digest: %s)",
tmp_cib, tmp_digest);
rc = cib_file_read_and_verify(tmp_cib, tmp_digest, NULL);
CRM_ASSERT(rc == 0);
/* Rename temporary files to live, and sync directory changes to media */
crm_debug("Activating %s", tmp_cib);
if (rename(tmp_cib, cib_path) < 0) {
crm_perror(LOG_ERR, "Couldn't rename %s as %s", tmp_cib, cib_path);
exit_rc = pcmk_err_cib_save;
}
if (rename(tmp_digest, digest_path) < 0) {
crm_perror(LOG_ERR, "Couldn't rename %s as %s", tmp_digest,
digest_path);
exit_rc = pcmk_err_cib_save;
}
pcmk__sync_directory(cib_dirname);
cleanup:
free(cib_path);
free(digest_path);
free(digest);
free(tmp_digest);
free(tmp_cib);
return exit_rc;
}
cib_t *
cib_file_new(const char *cib_location)
{
cib_file_opaque_t *private = NULL;
cib_t *cib = cib_new_variant();
if (cib == NULL) {
return NULL;
}
private = calloc(1, sizeof(cib_file_opaque_t));
if (private == NULL) {
free(cib);
return NULL;
}
cib->variant = cib_file;
cib->variant_opaque = private;
if (cib_location == NULL) {
cib_location = getenv("CIB_file");
CRM_CHECK(cib_location != NULL, return NULL); // Shouldn't be possible
}
private->flags = 0;
if (cib_file_is_live(cib_location)) {
cib_set_file_flags(private, cib_file_flag_live);
crm_trace("File %s detected as live CIB", cib_location);
}
private->filename = strdup(cib_location);
/* assign variant specific ops */
cib->delegate_fn = cib_file_perform_op_delegate;
cib->cmds->signon = cib_file_signon;
cib->cmds->signoff = cib_file_signoff;
cib->cmds->free = cib_file_free;
cib->cmds->inputfd = cib_file_inputfd;
cib->cmds->register_notification = cib_file_register_notification;
cib->cmds->set_connection_dnotify = cib_file_set_connection_dnotify;
cib->cmds->client_id = cib_file_client_id;
return cib;
}
-/*!
- * \internal
- * \brief Read CIB from disk and validate it against XML schema
- *
- * \param[in] filename Name of file to read CIB from
- *
- * \return pcmk_ok on success,
- * -ENXIO if file does not exist (or stat() otherwise fails), or
- * -pcmk_err_schema_validation if XML doesn't parse or validate
- * \note If filename is the live CIB, this will *not* verify its digest,
- * though that functionality would be trivial to add here.
- * Also, this will *not* verify that the file is writable,
- * because some callers might not need to write.
- */
-static int
-load_file_cib(const char *filename)
-{
- struct stat buf;
- xmlNode *root = NULL;
-
- /* Ensure file is readable */
- if (strcmp(filename, "-") && (stat(filename, &buf) < 0)) {
- return -ENXIO;
- }
-
- /* Parse XML from file */
- root = filename2xml(filename);
- if (root == NULL) {
- return -pcmk_err_schema_validation;
- }
-
- /* Add a status section if not already present */
- if (find_xml_node(root, XML_CIB_TAG_STATUS, FALSE) == NULL) {
- create_xml_node(root, XML_CIB_TAG_STATUS);
- }
-
- /* Validate XML against its specified schema */
- if (validate_xml(root, NULL, TRUE) == FALSE) {
- const char *schema = crm_element_value(root, XML_ATTR_VALIDATION);
-
- crm_err("CIB does not validate against %s", schema);
- free_xml(root);
- return -pcmk_err_schema_validation;
- }
-
- /* Remember the parsed XML for later use */
- in_mem_cib = root;
- return pcmk_ok;
-}
-
-int
-cib_file_signon(cib_t * cib, const char *name, enum cib_conn_type type)
-{
- int rc = pcmk_ok;
- cib_file_opaque_t *private = cib->variant_opaque;
-
- if (private->filename == NULL) {
- rc = -EINVAL;
- } else {
- rc = load_file_cib(private->filename);
- }
-
- if (rc == pcmk_ok) {
- crm_debug("Opened connection to local file '%s' for %s",
- private->filename, name);
- cib->state = cib_connected_command;
- cib->type = cib_command;
-
- } else {
- crm_info("Connection to local file '%s' for %s failed: %s\n",
- private->filename, name, pcmk_strerror(rc));
- }
- return rc;
-}
-
/*!
* \internal
* \brief Write out the in-memory CIB to a live CIB file
*
* param[in,out] path Full path to file to write
*
* \return 0 on success, -1 on failure
*/
static int
cib_file_write_live(char *path)
{
uid_t uid = geteuid();
struct passwd *daemon_pwent;
char *sep = strrchr(path, '/');
const char *cib_dirname, *cib_filename;
int rc = 0;
/* Get the desired uid/gid */
errno = 0;
daemon_pwent = getpwnam(CRM_DAEMON_USER);
if (daemon_pwent == NULL) {
crm_perror(LOG_ERR, "Could not find %s user", CRM_DAEMON_USER);
return -1;
}
/* If we're root, we can change the ownership;
* if we're daemon, anything we create will be OK;
* otherwise, block access so we don't create wrong owner
*/
if ((uid != 0) && (uid != daemon_pwent->pw_uid)) {
crm_perror(LOG_ERR, "Must be root or %s to modify live CIB",
CRM_DAEMON_USER);
return 0;
}
/* fancy footwork to separate dirname from filename
* (we know the canonical name maps to the live CIB,
* but the given name might be relative, or symlinked)
*/
if (sep == NULL) { /* no directory component specified */
cib_dirname = "./";
cib_filename = path;
} else if (sep == path) { /* given name is in / */
cib_dirname = "/";
cib_filename = path + 1;
} else { /* typical case; split given name into parts */
*sep = '\0';
cib_dirname = path;
cib_filename = sep + 1;
}
/* if we're root, we want to update the file ownership */
if (uid == 0) {
cib_file_owner = daemon_pwent->pw_uid;
cib_file_group = daemon_pwent->pw_gid;
cib_do_chown = TRUE;
}
/* write the file */
if (cib_file_write_with_digest(in_mem_cib, cib_dirname,
cib_filename) != pcmk_ok) {
rc = -1;
}
/* turn off file ownership changes, for other callers */
if (uid == 0) {
cib_do_chown = FALSE;
}
/* undo fancy stuff */
if ((sep != NULL) && (*sep == '\0')) {
*sep = '/';
}
return rc;
}
/*!
* \internal
* \brief Sign-off method for CIB file variants
*
* This will write the file to disk if needed, and free the in-memory CIB. If
* the file is the live CIB, it will compute and write a signature as well.
*
* \param[in,out] cib CIB object to sign off
*
* \return pcmk_ok on success, pcmk_err_generic on failure
* \todo This method should refuse to write the live CIB if the CIB manager is
* running.
*/
int
cib_file_signoff(cib_t * cib)
{
int rc = pcmk_ok;
cib_file_opaque_t *private = cib->variant_opaque;
crm_debug("Disconnecting from the CIB manager");
cib->state = cib_disconnected;
cib->type = cib_no_connection;
/* If the in-memory CIB has been changed, write it to disk */
if (pcmk_is_set(private->flags, cib_file_flag_dirty)) {
/* If this is the live CIB, write it out with a digest */
if (pcmk_is_set(private->flags, cib_file_flag_live)) {
if (cib_file_write_live(private->filename) < 0) {
rc = pcmk_err_generic;
}
/* Otherwise, it's a simple write */
} else {
gboolean do_bzip = pcmk__ends_with_ext(private->filename, ".bz2");
if (write_xml_file(in_mem_cib, private->filename, do_bzip) <= 0) {
rc = pcmk_err_generic;
}
}
if (rc == pcmk_ok) {
crm_info("Wrote CIB to %s", private->filename);
cib_clear_file_flags(private, cib_file_flag_dirty);
} else {
crm_err("Could not write CIB to %s", private->filename);
}
}
/* Free the in-memory CIB */
free_xml(in_mem_cib);
in_mem_cib = NULL;
return rc;
}
int
cib_file_free(cib_t * cib)
{
int rc = pcmk_ok;
if (cib->state != cib_disconnected) {
rc = cib_file_signoff(cib);
}
if (rc == pcmk_ok) {
cib_file_opaque_t *private = cib->variant_opaque;
free(private->filename);
free(cib->cmds);
free(private);
free(cib);
} else {
fprintf(stderr, "Couldn't sign off: %d\n", rc);
}
return rc;
}