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-rw-r--r--block/rbd.c553
1 files changed, 375 insertions, 178 deletions
diff --git a/block/rbd.c b/block/rbd.c
index 22e8e69cbd..ee13f3d9d3 100644
--- a/block/rbd.c
+++ b/block/rbd.c
@@ -18,6 +18,7 @@
#include "block/block_int.h"
#include "crypto/secret.h"
#include "qemu/cutils.h"
+#include "qapi/qmp/qstring.h"
#include <rbd/librbd.h>
@@ -102,10 +103,10 @@ typedef struct BDRVRBDState {
char *snap;
} BDRVRBDState;
-static int qemu_rbd_next_tok(char *dst, int dst_len,
- char *src, char delim,
- const char *name,
- char **p, Error **errp)
+static char *qemu_rbd_next_tok(int max_len,
+ char *src, char delim,
+ const char *name,
+ char **p, Error **errp)
{
int l;
char *end;
@@ -127,17 +128,15 @@ static int qemu_rbd_next_tok(char *dst, int dst_len,
}
}
l = strlen(src);
- if (l >= dst_len) {
+ if (l >= max_len) {
error_setg(errp, "%s too long", name);
- return -EINVAL;
+ return NULL;
} else if (l == 0) {
error_setg(errp, "%s too short", name);
- return -EINVAL;
+ return NULL;
}
- pstrcpy(dst, dst_len, src);
-
- return 0;
+ return src;
}
static void qemu_rbd_unescape(char *src)
@@ -153,87 +152,134 @@ static void qemu_rbd_unescape(char *src)
*p = '\0';
}
-static int qemu_rbd_parsename(const char *filename,
- char *pool, int pool_len,
- char *snap, int snap_len,
- char *name, int name_len,
- char *conf, int conf_len,
- Error **errp)
+static void qemu_rbd_parse_filename(const char *filename, QDict *options,
+ Error **errp)
{
const char *start;
- char *p, *buf;
- int ret;
+ char *p, *buf, *keypairs;
+ char *found_str;
+ size_t max_keypair_size;
+ Error *local_err = NULL;
if (!strstart(filename, "rbd:", &start)) {
error_setg(errp, "File name must start with 'rbd:'");
- return -EINVAL;
+ return;
}
+ max_keypair_size = strlen(start) + 1;
buf = g_strdup(start);
+ keypairs = g_malloc0(max_keypair_size);
p = buf;
- *snap = '\0';
- *conf = '\0';
- ret = qemu_rbd_next_tok(pool, pool_len, p,
- '/', "pool name", &p, errp);
- if (ret < 0 || !p) {
- ret = -EINVAL;
+ found_str = qemu_rbd_next_tok(RBD_MAX_POOL_NAME_SIZE, p,
+ '/', "pool name", &p, &local_err);
+ if (local_err) {
+ goto done;
+ }
+ if (!p) {
+ error_setg(errp, "Pool name is required");
goto done;
}
- qemu_rbd_unescape(pool);
+ qemu_rbd_unescape(found_str);
+ qdict_put(options, "pool", qstring_from_str(found_str));
if (strchr(p, '@')) {
- ret = qemu_rbd_next_tok(name, name_len, p,
- '@', "object name", &p, errp);
- if (ret < 0) {
+ found_str = qemu_rbd_next_tok(RBD_MAX_IMAGE_NAME_SIZE, p,
+ '@', "object name", &p, &local_err);
+ if (local_err) {
goto done;
}
- ret = qemu_rbd_next_tok(snap, snap_len, p,
- ':', "snap name", &p, errp);
- qemu_rbd_unescape(snap);
+ qemu_rbd_unescape(found_str);
+ qdict_put(options, "image", qstring_from_str(found_str));
+
+ found_str = qemu_rbd_next_tok(RBD_MAX_SNAP_NAME_SIZE, p,
+ ':', "snap name", &p, &local_err);
+ if (local_err) {
+ goto done;
+ }
+ qemu_rbd_unescape(found_str);
+ qdict_put(options, "snapshot", qstring_from_str(found_str));
} else {
- ret = qemu_rbd_next_tok(name, name_len, p,
- ':', "object name", &p, errp);
+ found_str = qemu_rbd_next_tok(RBD_MAX_IMAGE_NAME_SIZE, p,
+ ':', "object name", &p, &local_err);
+ if (local_err) {
+ goto done;
+ }
+ qemu_rbd_unescape(found_str);
+ qdict_put(options, "image", qstring_from_str(found_str));
}
- qemu_rbd_unescape(name);
- if (ret < 0 || !p) {
+ if (!p) {
goto done;
}
- ret = qemu_rbd_next_tok(conf, conf_len, p,
- '\0', "configuration", &p, errp);
-
-done:
- g_free(buf);
- return ret;
-}
-
-static char *qemu_rbd_parse_clientname(const char *conf, char *clientname)
-{
- const char *p = conf;
+ found_str = qemu_rbd_next_tok(RBD_MAX_CONF_NAME_SIZE, p,
+ '\0', "configuration", &p, &local_err);
+ if (local_err) {
+ goto done;
+ }
- while (*p) {
- int len;
- const char *end = strchr(p, ':');
+ p = found_str;
- if (end) {
- len = end - p;
- } else {
- len = strlen(p);
+ /* The following are essentially all key/value pairs, and we treat
+ * 'id' and 'conf' a bit special. Key/value pairs may be in any order. */
+ while (p) {
+ char *name, *value;
+ name = qemu_rbd_next_tok(RBD_MAX_CONF_NAME_SIZE, p,
+ '=', "conf option name", &p, &local_err);
+ if (local_err) {
+ break;
}
- if (strncmp(p, "id=", 3) == 0) {
- len -= 3;
- strncpy(clientname, p + 3, len);
- clientname[len] = '\0';
- return clientname;
+ if (!p) {
+ error_setg(errp, "conf option %s has no value", name);
+ break;
}
- if (end == NULL) {
+
+ qemu_rbd_unescape(name);
+
+ value = qemu_rbd_next_tok(RBD_MAX_CONF_VAL_SIZE, p,
+ ':', "conf option value", &p, &local_err);
+ if (local_err) {
break;
}
- p = end + 1;
+ qemu_rbd_unescape(value);
+
+ if (!strcmp(name, "conf")) {
+ qdict_put(options, "conf", qstring_from_str(value));
+ } else if (!strcmp(name, "id")) {
+ qdict_put(options, "user" , qstring_from_str(value));
+ } else {
+ /* FIXME: This is pretty ugly, and not the right way to do this.
+ * These should be contained in a structure, and then
+ * passed explicitly as individual key/value pairs to
+ * rados. Consider this legacy code that needs to be
+ * updated. */
+ char *tmp = g_malloc0(max_keypair_size);
+ /* only use a delimiter if it is not the first keypair found */
+ /* These are sets of unknown key/value pairs we'll pass along
+ * to ceph */
+ if (keypairs[0]) {
+ snprintf(tmp, max_keypair_size, ":%s=%s", name, value);
+ pstrcat(keypairs, max_keypair_size, tmp);
+ } else {
+ snprintf(keypairs, max_keypair_size, "%s=%s", name, value);
+ }
+ g_free(tmp);
+ }
}
- return NULL;
+
+ if (keypairs[0]) {
+ qdict_put(options, "keyvalue-pairs", qstring_from_str(keypairs));
+ }
+
+
+done:
+ if (local_err) {
+ error_propagate(errp, local_err);
+ }
+ g_free(buf);
+ g_free(keypairs);
+ return;
}
@@ -256,26 +302,24 @@ static int qemu_rbd_set_auth(rados_t cluster, const char *secretid,
return 0;
}
-
-static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
- bool only_read_conf_file,
- Error **errp)
+static int qemu_rbd_set_keypairs(rados_t cluster, const char *keypairs,
+ Error **errp)
{
char *p, *buf;
- char name[RBD_MAX_CONF_NAME_SIZE];
- char value[RBD_MAX_CONF_VAL_SIZE];
+ char *name;
+ char *value;
+ Error *local_err = NULL;
int ret = 0;
- buf = g_strdup(conf);
+ buf = g_strdup(keypairs);
p = buf;
while (p) {
- ret = qemu_rbd_next_tok(name, sizeof(name), p,
- '=', "conf option name", &p, errp);
- if (ret < 0) {
+ name = qemu_rbd_next_tok(RBD_MAX_CONF_NAME_SIZE, p,
+ '=', "conf option name", &p, &local_err);
+ if (local_err) {
break;
}
- qemu_rbd_unescape(name);
if (!p) {
error_setg(errp, "conf option %s has no value", name);
@@ -283,36 +327,24 @@ static int qemu_rbd_set_conf(rados_t cluster, const char *conf,
break;
}
- ret = qemu_rbd_next_tok(value, sizeof(value), p,
- ':', "conf option value", &p, errp);
- if (ret < 0) {
+ value = qemu_rbd_next_tok(RBD_MAX_CONF_VAL_SIZE, p,
+ ':', "conf option value", &p, &local_err);
+ if (local_err) {
break;
}
- qemu_rbd_unescape(value);
- if (strcmp(name, "conf") == 0) {
- /* read the conf file alone, so it doesn't override more
- specific settings for a particular device */
- if (only_read_conf_file) {
- ret = rados_conf_read_file(cluster, value);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "error reading conf file %s",
- value);
- break;
- }
- }
- } else if (strcmp(name, "id") == 0) {
- /* ignore, this is parsed by qemu_rbd_parse_clientname() */
- } else if (!only_read_conf_file) {
- ret = rados_conf_set(cluster, name, value);
- if (ret < 0) {
- error_setg_errno(errp, -ret, "invalid conf option %s", name);
- ret = -EINVAL;
- break;
- }
+ ret = rados_conf_set(cluster, name, value);
+ if (ret < 0) {
+ error_setg_errno(errp, -ret, "invalid conf option %s", name);
+ ret = -EINVAL;
+ break;
}
}
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ }
g_free(buf);
return ret;
}
@@ -328,33 +360,84 @@ static void qemu_rbd_memset(RADOSCB *rcb, int64_t offs)
}
}
+static QemuOptsList runtime_opts = {
+ .name = "rbd",
+ .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
+ .desc = {
+ {
+ .name = "filename",
+ .type = QEMU_OPT_STRING,
+ .help = "Specification of the rbd image",
+ },
+ {
+ .name = "password-secret",
+ .type = QEMU_OPT_STRING,
+ .help = "ID of secret providing the password",
+ },
+ {
+ .name = "conf",
+ .type = QEMU_OPT_STRING,
+ .help = "Rados config file location",
+ },
+ {
+ .name = "pool",
+ .type = QEMU_OPT_STRING,
+ .help = "Rados pool name",
+ },
+ {
+ .name = "image",
+ .type = QEMU_OPT_STRING,
+ .help = "Image name in the pool",
+ },
+ {
+ .name = "snapshot",
+ .type = QEMU_OPT_STRING,
+ .help = "Ceph snapshot name",
+ },
+ {
+ /* maps to 'id' in rados_create() */
+ .name = "user",
+ .type = QEMU_OPT_STRING,
+ .help = "Rados id name",
+ },
+ {
+ .name = "keyvalue-pairs",
+ .type = QEMU_OPT_STRING,
+ .help = "Legacy rados key/value option parameters",
+ },
+ {
+ .name = "host",
+ .type = QEMU_OPT_STRING,
+ },
+ {
+ .name = "port",
+ .type = QEMU_OPT_STRING,
+ },
+ {
+ .name = "auth",
+ .type = QEMU_OPT_STRING,
+ .help = "Supported authentication method, either cephx or none",
+ },
+ { /* end of list */ }
+ },
+};
+
static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
{
Error *local_err = NULL;
int64_t bytes = 0;
int64_t objsize;
int obj_order = 0;
- char pool[RBD_MAX_POOL_NAME_SIZE];
- char name[RBD_MAX_IMAGE_NAME_SIZE];
- char snap_buf[RBD_MAX_SNAP_NAME_SIZE];
- char conf[RBD_MAX_CONF_SIZE];
- char clientname_buf[RBD_MAX_CONF_SIZE];
- char *clientname;
+ const char *pool, *name, *conf, *clientname, *keypairs;
const char *secretid;
rados_t cluster;
rados_ioctx_t io_ctx;
- int ret;
+ QDict *options = NULL;
+ QemuOpts *rbd_opts = NULL;
+ int ret = 0;
secretid = qemu_opt_get(opts, "password-secret");
- if (qemu_rbd_parsename(filename, pool, sizeof(pool),
- snap_buf, sizeof(snap_buf),
- name, sizeof(name),
- conf, sizeof(conf), &local_err) < 0) {
- error_propagate(errp, local_err);
- return -EINVAL;
- }
-
/* Read out options */
bytes = ROUND_UP(qemu_opt_get_size_del(opts, BLOCK_OPT_SIZE, 0),
BDRV_SECTOR_SIZE);
@@ -362,35 +445,55 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
if (objsize) {
if ((objsize - 1) & objsize) { /* not a power of 2? */
error_setg(errp, "obj size needs to be power of 2");
- return -EINVAL;
+ ret = -EINVAL;
+ goto exit;
}
if (objsize < 4096) {
error_setg(errp, "obj size too small");
- return -EINVAL;
+ ret = -EINVAL;
+ goto exit;
}
obj_order = ctz32(objsize);
}
- clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
+ options = qdict_new();
+ qemu_rbd_parse_filename(filename, options, &local_err);
+ if (local_err) {
+ ret = -EINVAL;
+ error_propagate(errp, local_err);
+ goto exit;
+ }
+
+ rbd_opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(rbd_opts, options, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ ret = -EINVAL;
+ goto exit;
+ }
+
+ pool = qemu_opt_get(rbd_opts, "pool");
+ conf = qemu_opt_get(rbd_opts, "conf");
+ clientname = qemu_opt_get(rbd_opts, "user");
+ name = qemu_opt_get(rbd_opts, "image");
+ keypairs = qemu_opt_get(rbd_opts, "keyvalue-pairs");
+
ret = rados_create(&cluster, clientname);
if (ret < 0) {
error_setg_errno(errp, -ret, "error initializing");
- return ret;
+ goto exit;
}
- if (strstr(conf, "conf=") == NULL) {
- /* try default location, but ignore failure */
- rados_conf_read_file(cluster, NULL);
- } else if (conf[0] != '\0' &&
- qemu_rbd_set_conf(cluster, conf, true, &local_err) < 0) {
- error_propagate(errp, local_err);
+ /* try default location when conf=NULL, but ignore failure */
+ ret = rados_conf_read_file(cluster, conf);
+ if (conf && ret < 0) {
+ error_setg_errno(errp, -ret, "error reading conf file %s", conf);
ret = -EIO;
goto shutdown;
}
- if (conf[0] != '\0' &&
- qemu_rbd_set_conf(cluster, conf, false, &local_err) < 0) {
- error_propagate(errp, local_err);
+ ret = qemu_rbd_set_keypairs(cluster, keypairs, errp);
+ if (ret < 0) {
ret = -EIO;
goto shutdown;
}
@@ -421,6 +524,10 @@ static int qemu_rbd_create(const char *filename, QemuOpts *opts, Error **errp)
shutdown:
rados_shutdown(cluster);
+
+exit:
+ QDECREF(options);
+ qemu_opts_del(rbd_opts);
return ret;
}
@@ -471,38 +578,104 @@ static void qemu_rbd_complete_aio(RADOSCB *rcb)
qemu_aio_unref(acb);
}
-/* TODO Convert to fine grained options */
-static QemuOptsList runtime_opts = {
- .name = "rbd",
- .head = QTAILQ_HEAD_INITIALIZER(runtime_opts.head),
- .desc = {
- {
- .name = "filename",
- .type = QEMU_OPT_STRING,
- .help = "Specification of the rbd image",
- },
- {
- .name = "password-secret",
- .type = QEMU_OPT_STRING,
- .help = "ID of secret providing the password",
- },
- { /* end of list */ }
- },
-};
+#define RBD_MON_HOST 0
+#define RBD_AUTH_SUPPORTED 1
+
+static char *qemu_rbd_array_opts(QDict *options, const char *prefix, int type,
+ Error **errp)
+{
+ int num_entries;
+ QemuOpts *opts = NULL;
+ QDict *sub_options;
+ const char *host;
+ const char *port;
+ char *str;
+ char *rados_str = NULL;
+ Error *local_err = NULL;
+ int i;
+
+ assert(type == RBD_MON_HOST || type == RBD_AUTH_SUPPORTED);
+
+ num_entries = qdict_array_entries(options, prefix);
+
+ if (num_entries < 0) {
+ error_setg(errp, "Parse error on RBD QDict array");
+ return NULL;
+ }
+
+ for (i = 0; i < num_entries; i++) {
+ char *strbuf = NULL;
+ const char *value;
+ char *rados_str_tmp;
+
+ str = g_strdup_printf("%s%d.", prefix, i);
+ qdict_extract_subqdict(options, &sub_options, str);
+ g_free(str);
+
+ opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
+ qemu_opts_absorb_qdict(opts, sub_options, &local_err);
+ QDECREF(sub_options);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ g_free(rados_str);
+ rados_str = NULL;
+ goto exit;
+ }
+
+ if (type == RBD_MON_HOST) {
+ host = qemu_opt_get(opts, "host");
+ port = qemu_opt_get(opts, "port");
+
+ value = host;
+ if (port) {
+ /* check for ipv6 */
+ if (strchr(host, ':')) {
+ strbuf = g_strdup_printf("[%s]:%s", host, port);
+ } else {
+ strbuf = g_strdup_printf("%s:%s", host, port);
+ }
+ value = strbuf;
+ } else if (strchr(host, ':')) {
+ strbuf = g_strdup_printf("[%s]", host);
+ value = strbuf;
+ }
+ } else {
+ value = qemu_opt_get(opts, "auth");
+ }
+
+
+ /* each iteration in the for loop will build upon the string, and if
+ * rados_str is NULL then it is our first pass */
+ if (rados_str) {
+ /* separate options with ';', as that is what rados_conf_set()
+ * requires */
+ rados_str_tmp = rados_str;
+ rados_str = g_strdup_printf("%s;%s", rados_str_tmp, value);
+ g_free(rados_str_tmp);
+ } else {
+ rados_str = g_strdup(value);
+ }
+
+ g_free(strbuf);
+ qemu_opts_del(opts);
+ opts = NULL;
+ }
+
+exit:
+ qemu_opts_del(opts);
+ return rados_str;
+}
static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
Error **errp)
{
BDRVRBDState *s = bs->opaque;
- char pool[RBD_MAX_POOL_NAME_SIZE];
- char snap_buf[RBD_MAX_SNAP_NAME_SIZE];
- char conf[RBD_MAX_CONF_SIZE];
- char clientname_buf[RBD_MAX_CONF_SIZE];
- char *clientname;
+ const char *pool, *snap, *conf, *clientname, *name, *keypairs;
const char *secretid;
QemuOpts *opts;
Error *local_err = NULL;
- const char *filename;
+ char *mon_host = NULL;
+ char *auth_supported = NULL;
int r;
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
@@ -513,41 +686,63 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
return -EINVAL;
}
- filename = qemu_opt_get(opts, "filename");
- secretid = qemu_opt_get(opts, "password-secret");
+ auth_supported = qemu_rbd_array_opts(options, "auth-supported.",
+ RBD_AUTH_SUPPORTED, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
+ r = -EINVAL;
+ goto failed_opts;
+ }
- if (qemu_rbd_parsename(filename, pool, sizeof(pool),
- snap_buf, sizeof(snap_buf),
- s->name, sizeof(s->name),
- conf, sizeof(conf), errp) < 0) {
+ mon_host = qemu_rbd_array_opts(options, "server.",
+ RBD_MON_HOST, &local_err);
+ if (local_err) {
+ error_propagate(errp, local_err);
r = -EINVAL;
goto failed_opts;
}
- clientname = qemu_rbd_parse_clientname(conf, clientname_buf);
+ secretid = qemu_opt_get(opts, "password-secret");
+
+ pool = qemu_opt_get(opts, "pool");
+ conf = qemu_opt_get(opts, "conf");
+ snap = qemu_opt_get(opts, "snapshot");
+ clientname = qemu_opt_get(opts, "user");
+ name = qemu_opt_get(opts, "image");
+ keypairs = qemu_opt_get(opts, "keyvalue-pairs");
+
r = rados_create(&s->cluster, clientname);
if (r < 0) {
error_setg_errno(errp, -r, "error initializing");
goto failed_opts;
}
- s->snap = NULL;
- if (snap_buf[0] != '\0') {
- s->snap = g_strdup(snap_buf);
+ s->snap = g_strdup(snap);
+ if (name) {
+ pstrcpy(s->name, RBD_MAX_IMAGE_NAME_SIZE, name);
+ }
+
+ /* try default location when conf=NULL, but ignore failure */
+ r = rados_conf_read_file(s->cluster, conf);
+ if (conf && r < 0) {
+ error_setg_errno(errp, -r, "error reading conf file %s", conf);
+ goto failed_shutdown;
+ }
+
+ r = qemu_rbd_set_keypairs(s->cluster, keypairs, errp);
+ if (r < 0) {
+ goto failed_shutdown;
}
- if (strstr(conf, "conf=") == NULL) {
- /* try default location, but ignore failure */
- rados_conf_read_file(s->cluster, NULL);
- } else if (conf[0] != '\0') {
- r = qemu_rbd_set_conf(s->cluster, conf, true, errp);
+ if (mon_host) {
+ r = rados_conf_set(s->cluster, "mon_host", mon_host);
if (r < 0) {
goto failed_shutdown;
}
}
- if (conf[0] != '\0') {
- r = qemu_rbd_set_conf(s->cluster, conf, false, errp);
+ if (auth_supported) {
+ r = rados_conf_set(s->cluster, "auth_supported", auth_supported);
if (r < 0) {
goto failed_shutdown;
}
@@ -601,6 +796,8 @@ failed_shutdown:
g_free(s->snap);
failed_opts:
qemu_opts_del(opts);
+ g_free(mon_host);
+ g_free(auth_supported);
return r;
}
@@ -1004,18 +1201,18 @@ static QemuOptsList qemu_rbd_create_opts = {
};
static BlockDriver bdrv_rbd = {
- .format_name = "rbd",
- .instance_size = sizeof(BDRVRBDState),
- .bdrv_needs_filename = true,
- .bdrv_file_open = qemu_rbd_open,
- .bdrv_close = qemu_rbd_close,
- .bdrv_create = qemu_rbd_create,
- .bdrv_has_zero_init = bdrv_has_zero_init_1,
- .bdrv_get_info = qemu_rbd_getinfo,
- .create_opts = &qemu_rbd_create_opts,
- .bdrv_getlength = qemu_rbd_getlength,
- .bdrv_truncate = qemu_rbd_truncate,
- .protocol_name = "rbd",
+ .format_name = "rbd",
+ .instance_size = sizeof(BDRVRBDState),
+ .bdrv_parse_filename = qemu_rbd_parse_filename,
+ .bdrv_file_open = qemu_rbd_open,
+ .bdrv_close = qemu_rbd_close,
+ .bdrv_create = qemu_rbd_create,
+ .bdrv_has_zero_init = bdrv_has_zero_init_1,
+ .bdrv_get_info = qemu_rbd_getinfo,
+ .create_opts = &qemu_rbd_create_opts,
+ .bdrv_getlength = qemu_rbd_getlength,
+ .bdrv_truncate = qemu_rbd_truncate,
+ .protocol_name = "rbd",
.bdrv_aio_readv = qemu_rbd_aio_readv,
.bdrv_aio_writev = qemu_rbd_aio_writev,
generated by cgit v1.2.3 (git 2.26.2) at 2024-12-27 22:30:24 +0000