[libvirt] [PATCH 1/6] Export virLease* functions for leases file handling

These functions are going to be reused very shortly. So instead of duplicating the code, lets move them into utils module. Signed-off-by: Michal Privoznik <mprivozn(a)redhat.com&gt; --- po/POTFILES.in | 1 + src/Makefile.am | 1 + src/libvirt_private.syms | 6 + src/network/leaseshelper.c | 271 +--------------------------------------- src/util/virlease.c | 304 +++++++++++++++++++++++++++++++++++++++++++++ src/util/virlease.h | 44 +++++++ 6 files changed, 357 insertions(+), 270 deletions(-) create mode 100644 src/util/virlease.c create mode 100644 src/util/virlease.h diff --git a/po/POTFILES.in b/po/POTFILES.in index 4d82a8f..fda5853 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -202,6 +202,7 @@ src/util/viriptables.c src/util/viriscsi.c src/util/virjson.c src/util/virkeyfile.c +src/util/virlease.c src/util/virlockspace.c src/util/virnetdev.c src/util/virnetdevbandwidth.c diff --git a/src/Makefile.am b/src/Makefile.am index f857e59..c48960b 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -125,6 +125,7 @@ UTIL_SOURCES = \ util/virkeycode.c util/virkeycode.h \ util/virkeyfile.c util/virkeyfile.h \ util/virkeymaps.h \ + util/virlease.c util/virlease.h \ util/virlockspace.c util/virlockspace.h \ util/virlog.c util/virlog.h \ util/virmacaddr.h util/virmacaddr.c \ diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 4cfaed5..74f0275 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1715,6 +1715,12 @@ virKModLoad; virKModUnload; +# util/virlease.h +virLeaseNew; +virLeasePrintLeases; +virLeaseReadCustomLeaseFile; + + # util/virlockspace.h virLockSpaceAcquireResource; virLockSpaceCreateResource; diff --git a/src/network/leaseshelper.c b/src/network/leaseshelper.c index 55ddd58..94a6163 100644 --- a/src/network/leaseshelper.c +++ b/src/network/leaseshelper.c @@ -28,34 +28,18 @@ #include <locale.h> #include <stdio.h> #include <stdlib.h> -#include <sys/stat.h> -#include "virutil.h" #include "virthread.h" #include "virfile.h" #include "virpidfile.h" -#include "virbuffer.h" #include "virstring.h" #include "virerror.h" #include "viralloc.h" -#include "virjson.h" +#include "virlease.h" #include "configmake.h" #define VIR_FROM_THIS VIR_FROM_NETWORK -/** - * VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX: - * - * Macro providing the upper limit on the size of leases file - */ -#define VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX (32 * 1024 * 1024) - -/* - * Use this when passing possibly-NULL strings to printf-a-likes. - * Required for unknown parameters during init call. - */ -#define EMPTY_STR(s) ((s) ? (s) : "*") - static const char *program_name; /* Display version information. */ @@ -105,259 +89,6 @@ VIR_ENUM_DECL(virLeaseAction); VIR_ENUM_IMPL(virLeaseAction, VIR_LEASE_ACTION_LAST, "add", "old", "del", "init"); -static int -virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new, - const char *custom_lease_file, - const char *ip_to_delete, - char **server_duid) -{ - char *lease_entries = NULL; - virJSONValuePtr leases_array = NULL; - long long currtime = 0; - long long expirytime; - int custom_lease_file_len = 0; - virJSONValuePtr lease_tmp = NULL; - const char *ip_tmp = NULL; - const char *server_duid_tmp = NULL; - size_t i; - int ret = -1; - - currtime = (long long) time(NULL); - - /* Read entire contents */ - if ((custom_lease_file_len = virFileReadAll(custom_lease_file, - VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX, - &lease_entries)) < 0) { - goto cleanup; - } - - /* Check for previous leases */ - if (custom_lease_file_len == 0) { - ret = 0; - goto cleanup; - } - - if (!(leases_array = virJSONValueFromString(lease_entries))) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("invalid json in file: %s, rewriting it"), - custom_lease_file); - ret = 0; - goto cleanup; - } - - if (!virJSONValueIsArray(leases_array)) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("couldn't fetch array of leases")); - goto cleanup; - } - - i = 0; - while (i < virJSONValueArraySize(leases_array)) { - if (!(lease_tmp = virJSONValueArrayGet(leases_array, i))) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to parse json")); - goto cleanup; - } - - if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address")) || - (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", &expirytime) < 0)) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to parse json")); - goto cleanup; - } - /* Check whether lease has expired or not */ - if (expirytime < currtime) { - i++; - continue; - } - - /* Check whether lease has to be included or not */ - if (ip_to_delete && STREQ(ip_tmp, ip_to_delete)) { - i++; - continue; - } - - if (strchr(ip_tmp, ':')) { - /* This is an ipv6 lease */ - if ((server_duid_tmp - = virJSONValueObjectGetString(lease_tmp, "server-duid"))) { - if (!*server_duid && VIR_STRDUP(*server_duid, server_duid_tmp) < 0) { - /* Control reaches here when the 'action' is not for an - * ipv6 lease or, for some weird reason the env var - * DNSMASQ_SERVER_DUID wasn't set*/ - goto cleanup; - } - } else { - /* Inject server-duid into those ipv6 leases which - * didn't have it previously, for example, those - * created by leaseshelper from libvirt 1.2.6 */ - if (virJSONValueObjectAppendString(lease_tmp, "server-duid", *server_duid) < 0) - goto cleanup; - } - } - - /* Move old lease to new array */ - if (virJSONValueArrayAppend(leases_array_new, lease_tmp) < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to create json")); - goto cleanup; - } - - ignore_value(virJSONValueArraySteal(leases_array, i)); - } - - ret = 0; - - cleanup: - virJSONValueFree(leases_array); - VIR_FREE(lease_entries); - return ret; -} - -static int -virLeasePrintLeases(virJSONValuePtr leases_array_new, - const char *server_duid) -{ - virJSONValuePtr lease_tmp = NULL; - const char *ip_tmp = NULL; - long long expirytime = 0; - int ret = -1; - size_t i; - - /* Man page of dnsmasq says: the script (helper program, in our case) - * should write the saved state of the lease database, in dnsmasq - * leasefile format, to stdout and exit with zero exit code, when - * called with argument init. Format: - * $expirytime $mac $ip $hostname $clientid # For all ipv4 leases - * duid $server-duid # If DHCPv6 is present - * $expirytime $iaid $ip $hostname $clientduid # For all ipv6 leases */ - - /* Traversing the ipv4 leases */ - for (i = 0; i < virJSONValueArraySize(leases_array_new); i++) { - lease_tmp = virJSONValueArrayGet(leases_array_new, i); - if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address"))) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to parse json")); - goto cleanup; - } - if (!strchr(ip_tmp, ':')) { - if (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", - &expirytime) < 0) - continue; - - printf("%lld %s %s %s %s\n", - expirytime, - virJSONValueObjectGetString(lease_tmp, "mac-address"), - virJSONValueObjectGetString(lease_tmp, "ip-address"), - EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "hostname")), - EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "client-id"))); - } - } - - /* Traversing the ipv6 leases */ - if (server_duid) { - printf("duid %s\n", server_duid); - for (i = 0; i < virJSONValueArraySize(leases_array_new); i++) { - lease_tmp = virJSONValueArrayGet(leases_array_new, i); - if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address"))) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to parse json")); - goto cleanup; - } - if (strchr(ip_tmp, ':')) { - if (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", - &expirytime) < 0) - continue; - - printf("%lld %s %s %s %s\n", - expirytime, - virJSONValueObjectGetString(lease_tmp, "iaid"), - virJSONValueObjectGetString(lease_tmp, "ip-address"), - EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "hostname")), - EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "client-id"))); - } - } - } - - ret = 0; - - cleanup: - return ret; -} - -static int -virLeaseNew(virJSONValuePtr *lease_ret, - const char *mac, - const char *clientid, - const char *ip, - const char *hostname, - const char *iaid, - const char *server_duid) -{ - virJSONValuePtr lease_new = NULL; - const char *exptime_tmp = virGetEnvAllowSUID("DNSMASQ_LEASE_EXPIRES"); - long long expirytime = 0; - char *exptime = NULL; - int ret = -1; - - /* In case hostname is still unknown, use the last known one */ - if (!hostname) - hostname = virGetEnvAllowSUID("DNSMASQ_OLD_HOSTNAME"); - - if (!mac) { - ret = 0; - goto cleanup; - } - - if (exptime_tmp) { - if (VIR_STRDUP(exptime, exptime_tmp) < 0) - goto cleanup; - - /* Removed extraneous trailing space in DNSMASQ_LEASE_EXPIRES - * (dnsmasq < 2.52) */ - if (exptime[strlen(exptime) - 1] == ' ') - exptime[strlen(exptime) - 1] = '\0'; - } - - if (!exptime || - virStrToLong_ll(exptime, NULL, 10, &expirytime) < 0) { - virReportError(VIR_ERR_INTERNAL_ERROR, - _("Unable to convert lease expiry time to long long: %s"), - NULLSTR(exptime)); - goto cleanup; - } - - /* Create new lease */ - if (!(lease_new = virJSONValueNewObject())) { - virReportError(VIR_ERR_INTERNAL_ERROR, "%s", - _("failed to create json")); - goto cleanup; - } - - if (iaid && virJSONValueObjectAppendString(lease_new, "iaid", iaid) < 0) - goto cleanup; - if (ip && virJSONValueObjectAppendString(lease_new, "ip-address", ip) < 0) - goto cleanup; - if (mac && virJSONValueObjectAppendString(lease_new, "mac-address", mac) < 0) - goto cleanup; - if (hostname && virJSONValueObjectAppendString(lease_new, "hostname", hostname) < 0) - goto cleanup; - if (clientid && virJSONValueObjectAppendString(lease_new, "client-id", clientid) < 0) - goto cleanup; - if (server_duid && virJSONValueObjectAppendString(lease_new, "server-duid", server_duid) < 0) - goto cleanup; - if (expirytime && virJSONValueObjectAppendNumberLong(lease_new, "expiry-time", expirytime) < 0) - goto cleanup; - - ret = 0; - *lease_ret = lease_new; - lease_new = NULL; - cleanup: - VIR_FREE(exptime); - virJSONValueFree(lease_new); - return ret; -} - int main(int argc, char **argv) { diff --git a/src/util/virlease.c b/src/util/virlease.c new file mode 100644 index 0000000..b8e9d8b --- /dev/null +++ b/src/util/virlease.c @@ -0,0 +1,304 @@ +/* + * virlease.c: Leases file handling + * + * Copyright (C) 2014 Red Hat, Inc. + * Copyright (C) 2014 Nehal J Wani + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + * + */ + +#include <config.h> + +#include "virlease.h" + +#include <time.h> + +#include "virfile.h" +#include "virstring.h" +#include "virerror.h" +#include "viralloc.h" + +#define VIR_FROM_THIS VIR_FROM_NETWORK + +/** + * VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX: + * + * Macro providing the upper limit on the size of leases file + */ +#define VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX (32 * 1024 * 1024) + + +/* + * Use this when passing possibly-NULL strings to printf-a-likes. + * Required for unknown parameters during init call. + */ +#define EMPTY_STR(s) ((s) ? (s) : "*") + + +int +virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new, + const char *custom_lease_file, + const char *ip_to_delete, + char **server_duid) +{ + char *lease_entries = NULL; + virJSONValuePtr leases_array = NULL; + long long currtime = 0; + long long expirytime; + int custom_lease_file_len = 0; + virJSONValuePtr lease_tmp = NULL; + const char *ip_tmp = NULL; + const char *server_duid_tmp = NULL; + size_t i; + int ret = -1; + + currtime = (long long) time(NULL); + + /* Read entire contents */ + if ((custom_lease_file_len = virFileReadAll(custom_lease_file, + VIR_NETWORK_DHCP_LEASE_FILE_SIZE_MAX, + &lease_entries)) < 0) { + goto cleanup; + } + + /* Check for previous leases */ + if (custom_lease_file_len == 0) { + ret = 0; + goto cleanup; + } + + if (!(leases_array = virJSONValueFromString(lease_entries))) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("invalid json in file: %s, rewriting it"), + custom_lease_file); + ret = 0; + goto cleanup; + } + + if (!virJSONValueIsArray(leases_array)) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("couldn't fetch array of leases")); + goto cleanup; + } + + i = 0; + while (i < virJSONValueArraySize(leases_array)) { + if (!(lease_tmp = virJSONValueArrayGet(leases_array, i))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse json")); + goto cleanup; + } + + if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address")) || + (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", &expirytime) < 0)) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse json")); + goto cleanup; + } + /* Check whether lease has expired or not */ + if (expirytime < currtime) { + i++; + continue; + } + + /* Check whether lease has to be included or not */ + if (ip_to_delete && STREQ(ip_tmp, ip_to_delete)) { + i++; + continue; + } + + if (strchr(ip_tmp, ':')) { + /* This is an ipv6 lease */ + if ((server_duid_tmp + = virJSONValueObjectGetString(lease_tmp, "server-duid"))) { + if (!*server_duid && VIR_STRDUP(*server_duid, server_duid_tmp) < 0) { + /* Control reaches here when the 'action' is not for an + * ipv6 lease or, for some weird reason the env var + * DNSMASQ_SERVER_DUID wasn't set*/ + goto cleanup; + } + } else { + /* Inject server-duid into those ipv6 leases which + * didn't have it previously, for example, those + * created by leaseshelper from libvirt 1.2.6 */ + if (virJSONValueObjectAppendString(lease_tmp, "server-duid", *server_duid) < 0) + goto cleanup; + } + } + + /* Move old lease to new array */ + if (virJSONValueArrayAppend(leases_array_new, lease_tmp) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to create json")); + goto cleanup; + } + + ignore_value(virJSONValueArraySteal(leases_array, i)); + } + + ret = 0; + + cleanup: + virJSONValueFree(leases_array); + VIR_FREE(lease_entries); + return ret; +} + + +int +virLeasePrintLeases(virJSONValuePtr leases_array_new, + const char *server_duid) +{ + virJSONValuePtr lease_tmp = NULL; + const char *ip_tmp = NULL; + long long expirytime = 0; + int ret = -1; + size_t i; + + /* Man page of dnsmasq says: the script (helper program, in our case) + * should write the saved state of the lease database, in dnsmasq + * leasefile format, to stdout and exit with zero exit code, when + * called with argument init. Format: + * $expirytime $mac $ip $hostname $clientid # For all ipv4 leases + * duid $server-duid # If DHCPv6 is present + * $expirytime $iaid $ip $hostname $clientduid # For all ipv6 leases */ + + /* Traversing the ipv4 leases */ + for (i = 0; i < virJSONValueArraySize(leases_array_new); i++) { + lease_tmp = virJSONValueArrayGet(leases_array_new, i); + if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address"))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse json")); + goto cleanup; + } + if (!strchr(ip_tmp, ':')) { + if (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", + &expirytime) < 0) + continue; + + printf("%lld %s %s %s %s\n", + expirytime, + virJSONValueObjectGetString(lease_tmp, "mac-address"), + virJSONValueObjectGetString(lease_tmp, "ip-address"), + EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "hostname")), + EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "client-id"))); + } + } + + /* Traversing the ipv6 leases */ + if (server_duid) { + printf("duid %s\n", server_duid); + for (i = 0; i < virJSONValueArraySize(leases_array_new); i++) { + lease_tmp = virJSONValueArrayGet(leases_array_new, i); + if (!(ip_tmp = virJSONValueObjectGetString(lease_tmp, "ip-address"))) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to parse json")); + goto cleanup; + } + if (strchr(ip_tmp, ':')) { + if (virJSONValueObjectGetNumberLong(lease_tmp, "expiry-time", + &expirytime) < 0) + continue; + + printf("%lld %s %s %s %s\n", + expirytime, + virJSONValueObjectGetString(lease_tmp, "iaid"), + virJSONValueObjectGetString(lease_tmp, "ip-address"), + EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "hostname")), + EMPTY_STR(virJSONValueObjectGetString(lease_tmp, "client-id"))); + } + } + } + + ret = 0; + + cleanup: + return ret; +} + + +int +virLeaseNew(virJSONValuePtr *lease_ret, + const char *mac, + const char *clientid, + const char *ip, + const char *hostname, + const char *iaid, + const char *server_duid) +{ + virJSONValuePtr lease_new = NULL; + const char *exptime_tmp = virGetEnvAllowSUID("DNSMASQ_LEASE_EXPIRES"); + long long expirytime = 0; + char *exptime = NULL; + int ret = -1; + + /* In case hostname is still unknown, use the last known one */ + if (!hostname) + hostname = virGetEnvAllowSUID("DNSMASQ_OLD_HOSTNAME"); + + if (!mac) { + ret = 0; + goto cleanup; + } + + if (exptime_tmp) { + if (VIR_STRDUP(exptime, exptime_tmp) < 0) + goto cleanup; + + /* Removed extraneous trailing space in DNSMASQ_LEASE_EXPIRES + * (dnsmasq < 2.52) */ + if (exptime[strlen(exptime) - 1] == ' ') + exptime[strlen(exptime) - 1] = '\0'; + } + + if (!exptime || + virStrToLong_ll(exptime, NULL, 10, &expirytime) < 0) { + virReportError(VIR_ERR_INTERNAL_ERROR, + _("Unable to convert lease expiry time to long long: %s"), + NULLSTR(exptime)); + goto cleanup; + } + + /* Create new lease */ + if (!(lease_new = virJSONValueNewObject())) { + virReportError(VIR_ERR_INTERNAL_ERROR, "%s", + _("failed to create json")); + goto cleanup; + } + + if (iaid && virJSONValueObjectAppendString(lease_new, "iaid", iaid) < 0) + goto cleanup; + if (ip && virJSONValueObjectAppendString(lease_new, "ip-address", ip) < 0) + goto cleanup; + if (mac && virJSONValueObjectAppendString(lease_new, "mac-address", mac) < 0) + goto cleanup; + if (hostname && virJSONValueObjectAppendString(lease_new, "hostname", hostname) < 0) + goto cleanup; + if (clientid && virJSONValueObjectAppendString(lease_new, "client-id", clientid) < 0) + goto cleanup; + if (server_duid && virJSONValueObjectAppendString(lease_new, "server-duid", server_duid) < 0) + goto cleanup; + if (expirytime && virJSONValueObjectAppendNumberLong(lease_new, "expiry-time", expirytime) < 0) + goto cleanup; + + ret = 0; + *lease_ret = lease_new; + lease_new = NULL; + cleanup: + VIR_FREE(exptime); + virJSONValueFree(lease_new); + return ret; +} diff --git a/src/util/virlease.h b/src/util/virlease.h new file mode 100644 index 0000000..b9f394e --- /dev/null +++ b/src/util/virlease.h @@ -0,0 +1,44 @@ +/* + * virlease.h: Leases file handling + * + * Copyright (C) 2014 Red Hat, Inc. + * Copyright (C) 2014 Nehal J Wani + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library. If not, see + * <http://www.gnu.org/licenses/>;. + * + */ + +#ifndef __VIR_LEASE_H_ +# define __VIR_LEASE_H_ + +# include "virjson.h" + +int virLeaseReadCustomLeaseFile(virJSONValuePtr leases_array_new, + const char *custom_lease_file, + const char *ip_to_delete, + char **server_duid); + +int virLeasePrintLeases(virJSONValuePtr leases_array_new, + const char *server_duid); + + +int virLeaseNew(virJSONValuePtr *lease_ret, + const char *mac, + const char *clientid, + const char *ip, + const char *hostname, + const char *iaid, + const char *server_duid); +#endif /* __VIR_LEASE_H */ -- 2.4.10