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-rw-r--r--xlators/features/locks/src/posix.c834
1 files changed, 834 insertions, 0 deletions
diff --git a/xlators/features/locks/src/posix.c b/xlators/features/locks/src/posix.c
new file mode 100644
index 00000000000..e2b336607c4
--- /dev/null
+++ b/xlators/features/locks/src/posix.c
@@ -0,0 +1,834 @@
+/*
+ Copyright (c) 2006, 2007, 2008 Z RESEARCH, Inc. <http://www.zresearch.com>
+ This file is part of GlusterFS.
+
+ GlusterFS is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3 of the License,
+ or (at your option) any later version.
+
+ GlusterFS 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see
+ <http://www.gnu.org/licenses/>.
+*/
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <pthread.h>
+
+#ifndef _CONFIG_H
+#define _CONFIG_H
+#include "config.h"
+#endif
+
+#include "glusterfs.h"
+#include "compat.h"
+#include "xlator.h"
+#include "inode.h"
+#include "logging.h"
+#include "common-utils.h"
+
+#include "locks.h"
+#include "common.h"
+
+#ifndef LLONG_MAX
+#define LLONG_MAX LONG_LONG_MAX /* compat with old gcc */
+#endif /* LLONG_MAX */
+
+/* Forward declarations */
+
+
+void do_blocked_rw (pl_inode_t *);
+static int __rw_allowable (pl_inode_t *, posix_lock_t *, glusterfs_fop_t);
+
+struct _truncate_ops {
+ loc_t loc;
+ fd_t *fd;
+ off_t offset;
+ enum {TRUNCATE, FTRUNCATE} op;
+};
+
+
+int
+pl_truncate_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct stat *buf)
+{
+ struct _truncate_ops *local = NULL;
+
+ local = frame->local;
+
+ if (local->op == TRUNCATE)
+ loc_wipe (&local->loc);
+
+ STACK_UNWIND (frame, op_ret, op_errno, buf);
+ return 0;
+}
+
+
+static int
+truncate_allowed (pl_inode_t *pl_inode,
+ transport_t *transport, pid_t client_pid,
+ off_t offset)
+{
+ posix_lock_t *l = NULL;
+ posix_lock_t region = {.list = {0, }, };
+ int ret = 1;
+
+ region.fl_start = offset;
+ region.fl_end = LLONG_MAX;
+ region.transport = transport;
+ region.client_pid = client_pid;
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry (l, &pl_inode->ext_list, list) {
+ if (!l->blocked
+ && locks_overlap (&region, l)
+ && !same_owner (&region, l)) {
+ ret = 0;
+ break;
+ }
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ return ret;
+}
+
+
+static int
+truncate_stat_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct stat *buf)
+{
+ posix_locks_private_t *priv = NULL;
+ struct _truncate_ops *local = NULL;
+ inode_t *inode = NULL;
+ pl_inode_t *pl_inode = NULL;
+
+
+ priv = this->private;
+ local = frame->local;
+
+ if (op_ret != 0) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "got error (errno=%d, stderror=%s) from child",
+ op_errno, strerror (op_errno));
+ goto unwind;
+ }
+
+ if (local->op == TRUNCATE)
+ inode = local->loc.inode;
+ else
+ inode = local->fd->inode;
+
+ pl_inode = pl_inode_get (this, inode);
+ if (!pl_inode) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "unable to get pl_inode from %p", inode);
+ op_errno = ENOMEM;
+ goto unwind;
+ }
+
+ if (priv->mandatory
+ && pl_inode->mandatory
+ && !truncate_allowed (pl_inode, frame->root->trans,
+ frame->root->pid, local->offset)) {
+ op_errno = EAGAIN;
+ goto unwind;
+ }
+
+ switch (local->op) {
+ case TRUNCATE:
+ STACK_WIND (frame, pl_truncate_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->truncate,
+ &local->loc, local->offset);
+ break;
+ case FTRUNCATE:
+ STACK_WIND (frame, pl_truncate_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->ftruncate,
+ local->fd, local->offset);
+ break;
+ }
+
+ return 0;
+
+unwind:
+ if (local->op == TRUNCATE)
+ loc_wipe (&local->loc);
+
+ STACK_UNWIND (frame, -1, ENOMEM, buf);
+ return 0;
+}
+
+
+int
+pl_truncate (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, off_t offset)
+{
+ struct _truncate_ops *local = NULL;
+
+ local = CALLOC (1, sizeof (struct _truncate_ops));
+ if (!local) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ goto unwind;
+ }
+
+ local->op = TRUNCATE;
+ local->offset = offset;
+ loc_copy (&local->loc, loc);
+
+ frame->local = local;
+
+ STACK_WIND (frame, truncate_stat_cbk, FIRST_CHILD (this),
+ FIRST_CHILD (this)->fops->stat, loc);
+
+ return 0;
+
+unwind:
+ STACK_UNWIND (frame, -1, ENOMEM, NULL);
+
+ return 0;
+}
+
+
+int
+pl_ftruncate (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, off_t offset)
+{
+ struct _truncate_ops *local = NULL;
+
+ local = CALLOC (1, sizeof (struct _truncate_ops));
+ if (!local) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ goto unwind;
+ }
+
+ local->op = FTRUNCATE;
+ local->offset = offset;
+ local->fd = fd;
+
+ frame->local = local;
+
+ STACK_WIND (frame, truncate_stat_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->fstat, fd);
+ return 0;
+
+unwind:
+ STACK_UNWIND (frame, -1, ENOMEM, NULL);
+
+ return 0;
+}
+
+
+static void
+__delete_locks_of_owner (pl_inode_t *pl_inode,
+ transport_t *transport, pid_t pid)
+{
+ posix_lock_t *tmp = NULL;
+ posix_lock_t *l = NULL;
+
+ /* TODO: what if it is a blocked lock with pending l->frame */
+
+ list_for_each_entry_safe (l, tmp, &pl_inode->ext_list, list) {
+ if ((l->transport == transport)
+ && (l->client_pid == pid)) {
+ __delete_lock (pl_inode, l);
+ __destroy_lock (l);
+ }
+ }
+
+ list_for_each_entry_safe (l, tmp, &pl_inode->int_list, list) {
+ if ((l->transport == transport)
+ && (l->client_pid == pid)) {
+ __delete_lock (pl_inode, l);
+ __destroy_lock (l);
+ }
+ }
+
+ return;
+}
+
+
+int
+pl_flush_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno)
+{
+ STACK_UNWIND (frame, op_ret, op_errno);
+
+ return 0;
+}
+
+
+int
+pl_flush (call_frame_t *frame, xlator_t *this,
+ fd_t *fd)
+{
+ posix_locks_private_t *priv = NULL;
+ pl_inode_t *pl_inode = NULL;
+
+ priv = this->private;
+
+ pl_inode = pl_inode_get (this, fd->inode);
+ if (!pl_inode) {
+ gf_log (this->name, GF_LOG_ERROR, "returning EBADFD");
+ STACK_UNWIND (frame, -1, EBADFD);
+ return 0;
+ }
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ __delete_locks_of_owner (pl_inode, frame->root->trans,
+ frame->root->pid);
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ grant_blocked_locks (this, pl_inode, GF_LOCK_POSIX);
+ grant_blocked_locks (this, pl_inode, GF_LOCK_INTERNAL);
+
+ do_blocked_rw (pl_inode);
+
+ STACK_WIND (frame, pl_flush_cbk, FIRST_CHILD(this),
+ FIRST_CHILD(this)->fops->flush, fd);
+ return 0;
+}
+
+
+int
+pl_open_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, fd_t *fd)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, fd);
+
+ return 0;
+}
+
+
+int
+pl_open (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t flags, fd_t *fd)
+{
+ /* why isn't O_TRUNC being handled ? */
+ STACK_WIND (frame, pl_open_cbk,
+ FIRST_CHILD(this), FIRST_CHILD(this)->fops->open,
+ loc, flags & ~O_TRUNC, fd);
+
+ return 0;
+}
+
+
+int
+pl_create_cbk (call_frame_t *frame, void *cookie,
+ xlator_t *this, int32_t op_ret, int32_t op_errno,
+ fd_t *fd, inode_t *inode, struct stat *buf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, fd, inode, buf);
+
+ return 0;
+}
+
+
+int
+pl_create (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t flags, mode_t mode, fd_t *fd)
+{
+ STACK_WIND (frame, pl_create_cbk,
+ FIRST_CHILD (this), FIRST_CHILD (this)->fops->create,
+ loc, flags, mode, fd);
+ return 0;
+}
+
+
+int
+pl_readv_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno,
+ struct iovec *vector, int32_t count, struct stat *stbuf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, vector, count, stbuf);
+
+ return 0;
+}
+
+int
+pl_writev_cbk (call_frame_t *frame, void *cookie, xlator_t *this,
+ int32_t op_ret, int32_t op_errno, struct stat *stbuf)
+{
+ STACK_UNWIND (frame, op_ret, op_errno, stbuf);
+
+ return 0;
+}
+
+
+void
+do_blocked_rw (pl_inode_t *pl_inode)
+{
+ struct list_head wind_list;
+ pl_rw_req_t *rw = NULL;
+ pl_rw_req_t *tmp = NULL;
+
+ INIT_LIST_HEAD (&wind_list);
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ list_for_each_entry_safe (rw, tmp, &pl_inode->rw_list, list) {
+ if (__rw_allowable (pl_inode, &rw->region,
+ rw->stub->fop)) {
+ list_del_init (&rw->list);
+ list_add_tail (&rw->list, &wind_list);
+ }
+ }
+ }
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ list_for_each_entry_safe (rw, tmp, &wind_list, list) {
+ list_del_init (&rw->list);
+ call_resume (rw->stub);
+ free (rw);
+ }
+
+ return;
+}
+
+
+static int
+__rw_allowable (pl_inode_t *pl_inode, posix_lock_t *region,
+ glusterfs_fop_t op)
+{
+ posix_lock_t *l = NULL;
+ int ret = 1;
+
+ list_for_each_entry (l, &pl_inode->ext_list, list) {
+ if (locks_overlap (l, region) && !same_owner (l, region)) {
+ if ((op == GF_FOP_READ) && (l->fl_type != F_WRLCK))
+ continue;
+ ret = 0;
+ break;
+ }
+ }
+
+ return ret;
+}
+
+
+int
+pl_readv_cont (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, size_t size, off_t offset)
+{
+ STACK_WIND (frame, pl_readv_cbk,
+ FIRST_CHILD (this), FIRST_CHILD (this)->fops->readv,
+ fd, size, offset);
+
+ return 0;
+}
+
+
+int
+pl_readv (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, size_t size, off_t offset)
+{
+ posix_locks_private_t *priv = NULL;
+ pl_inode_t *pl_inode = NULL;
+ pl_rw_req_t *rw = NULL;
+ posix_lock_t region = {.list = {0, }, };
+ int op_ret = 0;
+ int op_errno = 0;
+ char allowable = 0;
+
+
+ priv = this->private;
+
+ pl_inode = pl_inode_get (this, fd->inode);
+
+ if (priv->mandatory && pl_inode->mandatory) {
+ region.fl_start = offset;
+ region.fl_end = offset + size - 1;
+ region.transport = frame->root->trans;
+ region.client_pid = frame->root->pid;
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ allowable = __rw_allowable (pl_inode, &region,
+ GF_FOP_READ);
+ if (allowable)
+ goto unlock;
+
+ if (fd->flags & O_NONBLOCK) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "returning EWOULDBLOCK");
+ op_errno = EWOULDBLOCK;
+ op_ret = -1;
+ goto unlock;
+ }
+
+ rw = CALLOC (1, sizeof (*rw));
+ if (!rw) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_errno = ENOMEM;
+ op_ret = -1;
+ goto unlock;
+ }
+
+ rw->stub = fop_readv_stub (frame, pl_readv_cont,
+ fd, size, offset);
+ if (!rw->stub) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_errno = ENOMEM;
+ op_ret = -1;
+ free (rw);
+ goto unlock;
+ }
+
+ rw->region = region;
+
+ list_add_tail (&rw->list, &pl_inode->rw_list);
+ }
+ unlock:
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ goto unwind;
+ }
+
+
+ STACK_WIND (frame, pl_readv_cbk,
+ FIRST_CHILD (this), FIRST_CHILD (this)->fops->readv,
+ fd, size, offset);
+ return 0;
+
+unwind:
+ if (op_ret == -1)
+ STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL);
+
+ return 0;
+}
+
+
+int
+pl_writev_cont (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iovec *vector, int count, off_t offset)
+{
+ STACK_WIND (frame, pl_writev_cbk,
+ FIRST_CHILD (this), FIRST_CHILD (this)->fops->writev,
+ fd, vector, count, offset);
+
+ return 0;
+}
+
+
+int
+pl_writev (call_frame_t *frame, xlator_t *this, fd_t *fd,
+ struct iovec *vector, int32_t count, off_t offset)
+{
+ posix_locks_private_t *priv = NULL;
+ pl_inode_t *pl_inode = NULL;
+ pl_rw_req_t *rw = NULL;
+ posix_lock_t region = {.list = {0, }, };
+ int op_ret = 0;
+ int op_errno = 0;
+ char allowable = 0;
+
+
+ priv = this->private;
+
+ pl_inode = pl_inode_get (this, fd->inode);
+ if (priv->mandatory && pl_inode->mandatory) {
+ region.fl_start = offset;
+ region.fl_end = offset + iov_length (vector, count) - 1;
+ region.transport = frame->root->trans;
+ region.client_pid = frame->root->pid;
+
+ pthread_mutex_lock (&pl_inode->mutex);
+ {
+ allowable = __rw_allowable (pl_inode, &region,
+ GF_FOP_WRITE);
+ if (allowable)
+ goto unlock;
+
+ if (fd->flags & O_NONBLOCK) {
+ gf_log (this->name, GF_LOG_DEBUG,
+ "returning EWOULDBLOCK");
+ op_errno = EWOULDBLOCK;
+ op_ret = -1;
+ goto unlock;
+ }
+
+ rw = CALLOC (1, sizeof (*rw));
+ if (!rw) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_errno = ENOMEM;
+ op_ret = -1;
+ goto unlock;
+ }
+
+ rw->stub = fop_writev_stub (frame, pl_writev_cont,
+ fd, vector, count, offset);
+ if (!rw->stub) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_errno = ENOMEM;
+ op_ret = -1;
+ free (rw);
+ goto unlock;
+ }
+
+ rw->region = region;
+
+ list_add_tail (&rw->list, &pl_inode->rw_list);
+ }
+ unlock:
+ pthread_mutex_unlock (&pl_inode->mutex);
+
+ goto unwind;
+ }
+
+
+ STACK_WIND (frame, pl_writev_cbk,
+ FIRST_CHILD (this), FIRST_CHILD (this)->fops->writev,
+ fd, vector, count, offset);
+ return 0;
+
+unwind:
+ if (op_ret == -1)
+ STACK_UNWIND (frame, -1, op_errno, NULL, 0, NULL);
+
+ return 0;
+}
+
+
+int
+pl_lk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int32_t cmd, struct flock *flock)
+{
+ transport_t *transport = NULL;
+ pid_t client_pid = 0;
+ posix_locks_private_t *priv = NULL;
+ pl_inode_t *pl_inode = NULL;
+ int op_ret = 0;
+ int op_errno = 0;
+ int can_block = 0;
+ posix_lock_t *reqlock = NULL;
+ posix_lock_t *conf = NULL;
+ int ret = 0;
+
+ transport = frame->root->trans;
+ client_pid = frame->root->pid;
+ priv = this->private;
+
+ pl_inode = pl_inode_get (this, fd->inode);
+ if (!pl_inode) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto unwind;
+ }
+
+ reqlock = new_posix_lock (flock, transport, client_pid);
+ if (!reqlock) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "out of memory :(");
+ op_ret = -1;
+ op_errno = ENOMEM;
+ goto unwind;
+ }
+
+ switch (cmd) {
+
+#if F_GETLK != F_GETLK64
+ case F_GETLK64:
+#endif
+ case F_GETLK:
+ conf = pl_getlk (pl_inode, reqlock, GF_LOCK_POSIX);
+ posix_lock_to_flock (conf, flock);
+ __destroy_lock (reqlock);
+
+ break;
+
+#if F_SETLKW != F_SETLKW64
+ case F_SETLKW64:
+#endif
+ case F_SETLKW:
+ can_block = 1;
+ reqlock->frame = frame;
+ reqlock->this = this;
+ reqlock->fd = fd;
+
+ /* fall through */
+
+#if F_SETLK != F_SETLK64
+ case F_SETLK64:
+#endif
+ case F_SETLK:
+ memcpy (&reqlock->user_flock, flock, sizeof (struct flock));
+ ret = pl_setlk (this, pl_inode, reqlock,
+ can_block, GF_LOCK_POSIX);
+
+ if (ret == -1) {
+ if (can_block)
+ goto out;
+
+ gf_log (this->name, GF_LOG_DEBUG, "returning EAGAIN");
+ op_ret = -1;
+ op_errno = EAGAIN;
+ __destroy_lock (reqlock);
+ }
+ }
+
+unwind:
+ STACK_UNWIND (frame, op_ret, op_errno, flock);
+out:
+ return 0;
+}
+
+
+/* TODO: this function just logs, no action required?? */
+int
+pl_forget (xlator_t *this,
+ inode_t *inode)
+{
+ pl_inode_t *pl_inode = NULL;
+
+ pl_inode = pl_inode_get (this, inode);
+
+ if (!list_empty (&pl_inode->rw_list)) {
+ gf_log (this->name, GF_LOG_CRITICAL,
+ "pending R/W requests found!");
+ }
+
+ if (!list_empty (&pl_inode->ext_list)) {
+ gf_log (this->name, GF_LOG_CRITICAL,
+ "Pending fcntl locks found!");
+ }
+
+ if (!list_empty (&pl_inode->int_list)) {
+ gf_log (this->name, GF_LOG_CRITICAL,
+ "Pending internal locks found!");
+ }
+
+ if (!list_empty (&pl_inode->dir_list)) {
+ gf_log (this->name, GF_LOG_CRITICAL,
+ "Pending entry locks found!");
+ }
+
+ FREE (pl_inode);
+
+ return 0;
+}
+
+
+int
+init (xlator_t *this)
+{
+ posix_locks_private_t *priv = NULL;
+ xlator_list_t *trav = NULL;
+ data_t *mandatory = NULL;
+
+ if (!this->children || this->children->next) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "FATAL: posix-locks should have exactly one child");
+ return -1;
+ }
+
+ if (!this->parents) {
+ gf_log (this->name, GF_LOG_WARNING,
+ "dangling volume. check volfile ");
+ }
+
+ trav = this->children;
+ while (trav->xlator->children)
+ trav = trav->xlator->children;
+
+ if (strncmp ("storage/", trav->xlator->type, 8)) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "'posix-locks' not loaded over storage translator");
+ return -1;
+ }
+
+ priv = CALLOC (1, sizeof (*priv));
+
+ mandatory = dict_get (this->options, "mandatory-locks");
+ if (mandatory) {
+ if (gf_string2boolean (mandatory->data,
+ &priv->mandatory) == -1) {
+ gf_log (this->name, GF_LOG_ERROR,
+ "'mandatory-locks' takes only boolean "
+ "options");
+ return -1;
+ }
+ }
+
+ this->private = priv;
+ return 0;
+}
+
+
+int
+fini (xlator_t *this)
+{
+ posix_locks_private_t *priv = NULL;
+
+ priv = this->private;
+ free (priv);
+
+ return 0;
+}
+
+
+int
+pl_inodelk (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, int32_t cmd, struct flock *flock);
+
+int
+pl_finodelk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, int32_t cmd, struct flock *flock);
+
+int
+pl_entrylk (call_frame_t *frame, xlator_t *this,
+ loc_t *loc, const char *basename,
+ entrylk_cmd cmd, entrylk_type type);
+
+int
+pl_fentrylk (call_frame_t *frame, xlator_t *this,
+ fd_t *fd, const char *basename,
+ entrylk_cmd cmd, entrylk_type type);
+
+struct xlator_fops fops = {
+ .create = pl_create,
+ .truncate = pl_truncate,
+ .ftruncate = pl_ftruncate,
+ .open = pl_open,
+ .readv = pl_readv,
+ .writev = pl_writev,
+ .lk = pl_lk,
+ .inodelk = pl_inodelk,
+ .finodelk = pl_finodelk,
+ .entrylk = pl_entrylk,
+ .fentrylk = pl_fentrylk,
+ .flush = pl_flush,
+};
+
+
+struct xlator_mops mops = {
+};
+
+
+struct xlator_cbks cbks = {
+ .forget = pl_forget,
+};
+
+
+struct volume_options options[] = {
+ { .key = { "mandatory-locks", "mandatory" },
+ .type = GF_OPTION_TYPE_BOOL
+ },
+ { .key = {NULL} },
+};
generated by cgit (git 2.34.1) at 2024-11-20 15:34:04 +0000