[CRIU] [PATCH] [RFC] support for dumping anon:[timerfd]
shawn at churchofgit.com
shawn at churchofgit.com
Wed Feb 5 02:15:00 PST 2014
---- Original Message ----
From: "Andrew Vagin"
To: "Shawn Landden"
CC: criu at openvz.org
Sent: Wed, Feb 5, 2014, 12:00 AM
Subject: Re: [CRIU] [PATCH] [RFC] support for dumping anon:[timerfd]
On Tue, Feb 04, 2014 at 04:51:15PM -0800, Shawn Landden wrote:
How do I properly pack arguments for cr_exec()?
You didn't answer this important question. My patch doesn't work because I don't know how to use the parasite in criu.
Pls, split this patch on a few patches.
I recomend to read the third section of
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/SubmittingPatches (https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/SubmittingPatches)
I see four patches here:
1. add the pid agrument to file_desc_ops->open
2. dump/restore of timerfd
3. s/tty_open/open_tty, s/signalfd_open/open_signalfd, etc
4. .gitignor
A new functionality can be accepted only with a proper set of tests.
Pls, look at test/zdtm and create a test for timefd.
Signed-off-by: Shawn Landden
---
.gitignore | 1 +
Makefile.crtools | 1 +
eventfd.c | 2 +-
eventpoll.c | 2 +-
fifo.c | 2 +-
files-ext.c | 2 +-
files-reg.c | 2 +-
files.c | 5 +-
fsnotify.c | 4 +-
image-desc.c | 1 +
include/files.h | 2 +-
include/image-desc.h | 1 +
include/magic.h | 1 +
include/proc_parse.h | 2 +
include/protobuf-desc.h | 1 +
namespaces.c | 2 +-
pipes.c | 2 +-
proc_parse.c | 16 ++++++
protobuf-desc.c | 1 +
protobuf/Makefile | 1 +
protobuf/fdinfo.proto | 1 +
protobuf/timer.proto | 1 +
protobuf/timerfd.proto | 10 ++++
signalfd.c | 4 +-
sk-inet.c | 4 +-
sk-netlink.c | 2 +-
sk-packet.c | 2 +-
sk-unix.c | 2 +-
timerfd.c | 150 ++++++++++++++++++++++++++++++++++++++++++++++++
tty.c | 4 +-
tun.c | 4 +-
31 files changed, 213 insertions(+), 22 deletions(-)
create mode 100644 protobuf/timerfd.proto
create mode 100644 timerfd.c
diff --git a/.gitignore b/.gitignore
index 9e403ce..6394161 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
+*~
*.o
*.d
*.img
diff --git a/Makefile.crtools b/Makefile.crtools
index 094013e..cf8bcba 100644
--- a/Makefile.crtools
+++ b/Makefile.crtools
@@ -39,6 +39,7 @@ obj-y += ipc_ns.o
obj-y += netfilter.o
obj-y += shmem.o
obj-y += eventfd.o
+obj-y += timerfd.o
obj-y += eventpoll.o
obj-y += mount.o
obj-y += fsnotify.o
diff --git a/eventfd.c b/eventfd.c
index d4e7bf8..761bcc2 100644
--- a/eventfd.c
+++ b/eventfd.c
@@ -80,7 +80,7 @@ const struct fdtype_ops eventfd_dump_ops = {
.dump = dump_one_eventfd,
};
-static int eventfd_open(struct file_desc *d)
+static int eventfd_open(struct file_desc *d, int pid)
{
struct eventfd_file_info *info;
int tmp;
diff --git a/eventpoll.c b/eventpoll.c
index d82c19e..7f66c05 100644
--- a/eventpoll.c
+++ b/eventpoll.c
@@ -88,7 +88,7 @@ const struct fdtype_ops eventpoll_dump_ops = {
.dump = dump_one_eventpoll,
};
-static int eventpoll_open(struct file_desc *d)
+static int eventpoll_open(struct file_desc *d, int pid)
{
struct eventpoll_file_info *info;
int tmp;
diff --git a/fifo.c b/fifo.c
index 67d7f56..f025995 100644
--- a/fifo.c
+++ b/fifo.c
@@ -105,7 +105,7 @@ out:
return new_fifo;
}
-static int open_fifo_fd(struct file_desc *d)
+static int open_fifo_fd(struct file_desc *d, int pid)
{
struct fifo_info *info = container_of(d, struct fifo_info, d);
diff --git a/files-ext.c b/files-ext.c
index cd434ee..c6ab60e 100644
--- a/files-ext.c
+++ b/files-ext.c
@@ -37,7 +37,7 @@ struct ext_file_info {
ExtFileEntry *xfe;
};
-static int open_fd(struct file_desc *d)
+static int open_fd(struct file_desc *d, int pid)
{
struct ext_file_info *xfi;
int fd;
diff --git a/files-reg.c b/files-reg.c
index f98c792..31d1a1d 100644
--- a/files-reg.c
+++ b/files-reg.c
@@ -653,7 +653,7 @@ static int do_open_reg(struct reg_file_info *rfi, void *arg)
return fd;
}
-static int open_fe_fd(struct file_desc *fd)
+static int open_fe_fd(struct file_desc *fd, int pid)
{
return open_path(fd, do_open_reg, NULL);
}
diff --git a/files.c b/files.c
index df0e2f1..84b19c0 100644
--- a/files.c
+++ b/files.c
@@ -27,6 +27,7 @@
#include "pipes.h"
#include "fifo.h"
#include "eventfd.h"
+#include "timerfd.h"
#include "eventpoll.h"
#include "fsnotify.h"
#include "signalfd.h"
@@ -326,6 +327,8 @@ static int dump_one_file(struct parasite_ctl *ctl, int fd, int lfd, struct fd_op
ops = &fanotify_dump_ops;
else if (is_signalfd_link(lfd))
ops = &signalfd_dump_ops;
+ else if (is_timerfd_link(lfd))
+ ops = &timerfd_dump_ops;
else {
char more[64];
@@ -856,7 +859,7 @@ static int open_fd(int pid, struct fdinfo_list_entry *fle)
if (fle != file_master(d))
return 0;
- new_fd = d->ops->open(d);
+ new_fd = d->ops->open(d, pid);
if (new_fd < 0)
return -1;
diff --git a/fsnotify.c b/fsnotify.c
index a9412a0..f339f1b 100644
--- a/fsnotify.c
+++ b/fsnotify.c
@@ -429,7 +429,7 @@ err:
return ret;
}
-static int open_inotify_fd(struct file_desc *d)
+static int open_inotify_fd(struct file_desc *d, int pid)
{
struct fsnotify_file_info *info;
struct fsnotify_mark_info *wd_info;
@@ -457,7 +457,7 @@ static int open_inotify_fd(struct file_desc *d)
return tmp;
}
-static int open_fanotify_fd(struct file_desc *d)
+static int open_fanotify_fd(struct file_desc *d, int pid)
{
struct fsnotify_file_info *info;
struct fsnotify_mark_info *mark;
diff --git a/image-desc.c b/image-desc.c
index aa879e6..1e8950e 100644
--- a/image-desc.c
+++ b/image-desc.c
@@ -26,6 +26,7 @@ struct cr_fd_desc_tmpl fdset_template[CR_FD_MAX] = {
FD_ENTRY(EXT_FILES, "ext-files"),
FD_ENTRY(NS_FILES, "ns-files"),
FD_ENTRY(EVENTFD_FILE, "eventfd"),
+ FD_ENTRY(TIMERFD_FILE, "timerfd"),
FD_ENTRY(EVENTPOLL_FILE,"eventpoll"),
FD_ENTRY(EVENTPOLL_TFD, "eventpoll-tfd"),
FD_ENTRY(SIGNALFD, "signalfd"),
diff --git a/include/files.h b/include/files.h
index 975470f..9128f5b 100644
--- a/include/files.h
+++ b/include/files.h
@@ -83,7 +83,7 @@ struct file_desc_ops {
* The returned descriptor may be closed (dup2-ed to another)
* so it shouldn't be saved for any post-actions.
*/
- int (*open)(struct file_desc *d);
+ int (*open)(struct file_desc *d, int pid);
/*
* Called on a file when all files of that type are opened
* and with the fd being the "restored" one.
diff --git a/include/image-desc.h b/include/image-desc.h
index f43ad43..32b1177 100644
--- a/include/image-desc.h
+++ b/include/image-desc.h
@@ -72,6 +72,7 @@ enum {
CR_FD_EVENTPOLL_FILE,
CR_FD_EVENTPOLL_TFD,
CR_FD_SIGNALFD,
+ CR_FD_TIMERFD_FILE,
CR_FD_INOTIFY_FILE,
CR_FD_INOTIFY_WD,
CR_FD_FANOTIFY_FILE,
diff --git a/include/magic.h b/include/magic.h
index dfcf31d..e4460cb 100644
--- a/include/magic.h
+++ b/include/magic.h
@@ -53,6 +53,7 @@
#define GHOST_FILE_MAGIC 0x52583605 /* Oryol */
#define TCP_STREAM_MAGIC 0x51465506 /* Orenburg */
#define EVENTFD_FILE_MAGIC 0x44523722 /* Anapa */
+#define TIMERFD_FILE_MAGIC 0x48551221 /* Nooksack WA USA */
#define EVENTPOLL_FILE_MAGIC 0x45023858 /* Krasnodar */
#define EVENTPOLL_TFD_MAGIC 0x44433746 /* Novorossiysk */
#define SIGNALFD_MAGIC 0x57323820 /* Uglich */
diff --git a/include/proc_parse.h b/include/proc_parse.h
index 7fbf4aa..d684764 100644
--- a/include/proc_parse.h
+++ b/include/proc_parse.h
@@ -9,6 +9,7 @@
#include "protobuf/eventpoll.pb-c.h"
#include "protobuf/signalfd.pb-c.h"
#include "protobuf/fsnotify.pb-c.h"
+#include "protobuf/timerfd.pb-c.h"
#define PROC_TASK_COMM_LEN 32
#define PROC_TASK_COMM_LEN_FMT "(%31s"
@@ -145,6 +146,7 @@ extern int parse_pid_status(pid_t pid, struct proc_status_creds *);
union fdinfo_entries {
EventfdFileEntry efd;
+ TimerfdFileEntry tfd;
EventpollTfdEntry epl;
SignalfdEntry sfd;
InotifyWdEntry ify;
diff --git a/include/protobuf-desc.h b/include/protobuf-desc.h
index fa9dd61..5bb8452 100644
--- a/include/protobuf-desc.h
+++ b/include/protobuf-desc.h
@@ -13,6 +13,7 @@ enum {
PB_VMA,
PB_ITIMER,
PB_POSIX_TIMER,
+ PB_TIMERFD_FILE,
PB_CREDS,
PB_FS,
PB_UTSNS, /* 10 */
diff --git a/namespaces.c b/namespaces.c
index 37e232c..60a439b 100644
--- a/namespaces.c
+++ b/namespaces.c
@@ -227,7 +227,7 @@ struct ns_file_info {
NsFileEntry *nfe;
};
-static int open_ns_fd(struct file_desc *d)
+static int open_ns_fd(struct file_desc *d, int pid)
{
struct ns_file_info *nfi = container_of(d, struct ns_file_info, d);
struct pstree_item *item, *t;
diff --git a/pipes.c b/pipes.c
index ef260aa..05d01e3 100644
--- a/pipes.c
+++ b/pipes.c
@@ -292,7 +292,7 @@ static int recv_pipe_fd(struct pipe_info *pi)
return fd;
}
-static int open_pipe(struct file_desc *d)
+static int open_pipe(struct file_desc *d, int pid)
{
struct pipe_info *pi, *p;
int ret, tmp;
diff --git a/proc_parse.c b/proc_parse.c
index 55d7c78..0ebe11b 100644
--- a/proc_parse.c
+++ b/proc_parse.c
@@ -1002,6 +1002,22 @@ static int parse_fdinfo_pid_s(char *pid, int fd, int type,
entry_met = true;
continue;
}
+ if (fdinfo_field(str, "clockid")) {
+ timerfd_file_entry__init(&entry.tfd);
+
+ if (type != FD_TYPES__TIMERFD)
+ goto parse_err;
+ ret = sscanf(str, "clockid: %d",
+ (int *)&entry.tfd.clockid);
+ if (ret != 1)
+ goto parse_err;
+ ret = cb(&entry, arg);
+ if (ret)
+ goto out;
+
+ entry_met = true;
+ continue;
+ }
if (fdinfo_field(str, "fanotify flags")) {
struct fsnotify_params *p = arg;
diff --git a/protobuf-desc.c b/protobuf-desc.c
index a86ec38..9da2feb 100644
--- a/protobuf-desc.c
+++ b/protobuf-desc.c
@@ -38,6 +38,7 @@
#include "protobuf/sk-packet.pb-c.h"
#include "protobuf/creds.pb-c.h"
#include "protobuf/timer.pb-c.h"
+#include "protobuf/timerfd.pb-c.h"
#include "protobuf/utsns.pb-c.h"
#include "protobuf/ipc-var.pb-c.h"
#include "protobuf/ipc-shm.pb-c.h"
diff --git a/protobuf/Makefile b/protobuf/Makefile
index 2bfd696..85a6a92 100644
--- a/protobuf/Makefile
+++ b/protobuf/Makefile
@@ -35,6 +35,7 @@ proto-obj-y += mnt.o
proto-obj-y += pipe-data.o
proto-obj-y += sa.o
proto-obj-y += timer.o
+proto-obj-y += timerfd.o
proto-obj-y += mm.o
proto-obj-y += sk-opts.o
proto-obj-y += sk-unix.o
diff --git a/protobuf/fdinfo.proto b/protobuf/fdinfo.proto
index 2eb7986..2324c28 100644
--- a/protobuf/fdinfo.proto
+++ b/protobuf/fdinfo.proto
@@ -16,6 +16,7 @@ enum fd_types {
NS = 14;
TUN = 15;
EXT = 16;
+ TIMERFD = 17;
}
message fdinfo_entry {
diff --git a/protobuf/timer.proto b/protobuf/timer.proto
index d11f7ef..1383a53 100644
--- a/protobuf/timer.proto
+++ b/protobuf/timer.proto
@@ -1,3 +1,4 @@
+// with timerfd these "usec"s are actually nsecs
message itimer_entry {
required uint64 isec = 1;
required uint64 iusec = 2;
diff --git a/protobuf/timerfd.proto b/protobuf/timerfd.proto
new file mode 100644
index 0000000..708c957
--- /dev/null
+++ b/protobuf/timerfd.proto
@@ -0,0 +1,10 @@
+import "fown.proto";
+import "timer.proto";
+
+message timerfd_file_entry {
+ required uint32 id = 1;
+ required uint32 flags = 2;
+ required fown_entry fown = 3;
+ required itimer_entry timer = 4;
+ required int32 clockid = 5;
+}
diff --git a/signalfd.c b/signalfd.c
index 48816ed..72e4f1e 100644
--- a/signalfd.c
+++ b/signalfd.c
@@ -73,7 +73,7 @@ static void sigset_fill(sigset_t *to, unsigned long long from)
}
}
-static int signalfd_open(struct file_desc *d)
+static int open_signalfd(struct file_desc *d, int pid)
{
struct signalfd_info *info;
int tmp;
@@ -104,7 +104,7 @@ err_close:
static struct file_desc_ops signalfd_desc_ops = {
.type = FD_TYPES__SIGNALFD,
- .open = signalfd_open,
+ .open = open_signalfd,
};
static int collect_one_sigfd(void *o, ProtobufCMessage *msg)
diff --git a/sk-inet.c b/sk-inet.c
index 02c653f..b00bbad 100644
--- a/sk-inet.c
+++ b/sk-inet.c
@@ -370,7 +370,7 @@ int inet_collect_one(struct nlmsghdr *h, int family, int type)
return ret;
}
-static int open_inet_sk(struct file_desc *d);
+static int open_inet_sk(struct file_desc *d, int pid);
static int post_open_inet_sk(struct file_desc *d, int sk);
static struct file_desc_ops inet_desc_ops = {
@@ -467,7 +467,7 @@ static int post_open_inet_sk(struct file_desc *d, int sk)
return 0;
}
-static int open_inet_sk(struct file_desc *d)
+static int open_inet_sk(struct file_desc *d, int pid)
{
struct inet_sk_info *ii;
InetSkEntry *ie;
diff --git a/sk-netlink.c b/sk-netlink.c
index 83a2090..f562408 100644
--- a/sk-netlink.c
+++ b/sk-netlink.c
@@ -159,7 +159,7 @@ struct netlink_sock_info {
struct file_desc d;
};
-static int open_netlink_sk(struct file_desc *d)
+static int open_netlink_sk(struct file_desc *d, int pid)
{
struct netlink_sock_info *nsi;
NetlinkSkEntry *nse;
diff --git a/sk-packet.c b/sk-packet.c
index 2ed7ca6..ed9353b 100644
--- a/sk-packet.c
+++ b/sk-packet.c
@@ -393,7 +393,7 @@ static int restore_rings(int sk, PacketSockEntry *psk)
return 0;
}
-static int open_packet_sk(struct file_desc *d)
+static int open_packet_sk(struct file_desc *d, int pid)
{
struct packet_sock_info *psi;
PacketSockEntry *pse;
diff --git a/sk-unix.c b/sk-unix.c
index aa6d22f..bff1836 100644
--- a/sk-unix.c
+++ b/sk-unix.c
@@ -950,7 +950,7 @@ out:
return sk;
}
-static int open_unix_sk(struct file_desc *d)
+static int open_unix_sk(struct file_desc *d, int pid)
{
struct unix_sk_info *ui;
diff --git a/timerfd.c b/timerfd.c
new file mode 100644
index 0000000..9d32da8
--- /dev/null
+++ b/timerfd.c
@@ -0,0 +1,150 @@
+#include
+#include
+#include
+#include
+#include
+
+
+#include "compiler.h"
+#include "asm/types.h"
+#include "proc_parse.h"
+#include "fdset.h"
+#include "image.h"
+#include "util.h"
+#include "log.h"
+#include "files.h"
+#include "crtools.h"
+
+#include "timerfd.h"
+
+#include "protobuf.h"
+#include "protobuf/timerfd.pb-c.h"
+
+#undef LOG_PREFIX
+#define LOG_PREFIX "timerfd: "
+
+struct timerfd_file_info {
+ TimerfdFileEntry *tfe;
+ struct file_desc d;
+};
+
+/* Checks if file descriptor @lfd is eventfd */
+int is_timerfd_link(int lfd)
+{
+ return is_anon_link_type(lfd, "[timerfd]");
+}
+
+static void pr_info_timerfd(char *action, TimerfdFileEntry *tfe)
+{
+ pr_info("%s: id %#08x flags %#04x isec %"PRIu64" iusec %"PRIu64" vsec %"PRIu64" uvsec %"PRIu64"n",
+ action, tfe->id, tfe->flags, tfe->timer->isec,
+ tfe->timer->iusec, tfe->timer->vsec, tfe->timer->vusec);
+}
+
+struct timerfd_dump_arg {
+ u32 id;
+ const struct fd_parms *p;
+ bool dumped;
+};
+
+
+/* UGLY: global */
+struct itimerspec itimer = {{0,0},{0,0}};
+
+static int dump_timerfd_entry(union fdinfo_entries *e, void *arg)
+{
+ struct timerfd_dump_arg *da = arg;
+
+ if (da->dumped) {
+ pr_err("Several counters in a file?n");
+ return -1;
+ }
+
+ da->dumped = true;
+ e->efd.id = da->id;
+ e->efd.flags = da->p->flags;
+ e->efd.fown = (FownEntry *)&da->p->fown;
+
+ e->tfd.timer->isec = itimer.it_interval.tv_sec;
+ e->tfd.timer->iusec = itimer.it_interval.tv_nsec;
+ e->tfd.timer->vsec = itimer.it_value.tv_sec;
+ e->tfd.timer->vusec = itimer.it_value.tv_nsec;
+
+ pr_info_timerfd("Dumping ", &e->tfd);
+ return pb_write_one(fdset_fd(glob_fdset, CR_FD_TIMERFD_FILE),
+ &e->tfd, PB_TIMERFD_FILE);
+}
+
+static int pre_dump_one_timerfd(int pid, int lfd) {
+ int r;
+
+ r = cr_exec(pid, (char **){"timerfd_gettime", (char *)lfd, (char *)&itimer});
I don't think that we need to make predump for timerfd. It's useful for
inotify, becuse we need to look up a file handle to dump inotify.
This operation is heavy, so we do it in pre-dump.
+ if (r < 0) {
+ pr_err("timerfd_gettime failed: %mn");
+ return -errno;
+ }
+ return 0;
+}
+
+static int dump_one_timerfd(int lfd, u32 id, const struct fd_parms *p)
+{
+ struct timerfd_dump_arg da = { .id = id, .p = p, };
+ return parse_fdinfo(lfd, FD_TYPES__TIMERFD, dump_timerfd_entry, &da);
+}
+
+const struct fdtype_ops timerfd_dump_ops = {
+ .type = FD_TYPES__TIMERFD,
+ .dump = dump_one_timerfd,
+ .dump_pre = pre_dump_one_timerfd,
+};
+
+static int timerfd_open(struct file_desc *d, int pid)
+{
+ struct timerfd_file_info *info;
+ int tmp;
+
+ info = container_of(d, struct timerfd_file_info, d);
+ struct itimerspec itimer = {{info->tfe->timer->isec, info->tfe->timer->iusec}, {info->tfe->timer->vsec, info->tfe->timer->vusec}};
This line is too long
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/CodingStyle (https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/CodingStyle)
+
+ tmp = cr_exec(pid, (char **){"timerfd_create", (char *)info->tfe->clockid, (char *)0});
+ if (tmp < 0) {
+ pr_perror("Can't create timerfd %#08x",
+ info->tfe->id);
+ return -1;
+ }
+
+ cr_exec(pid, (char **){"timerfd_settime", (char *)tmp, 0, (char *)&itimer, NULL});
+
+ if (rst_file_params(tmp, info->tfe->fown, info->tfe->flags)) {
+ pr_perror("Can't restore params on timerfd %#08x",
+ info->tfe->id);
+ goto err_close;
+ }
+
+ return tmp;
+
+err_close:
+ close(tmp);
+ return -1;
+}
+
+static struct file_desc_ops timerfd_desc_ops = {
+ .type = FD_TYPES__TIMERFD,
+ .open = timerfd_open,
+};
+
+static int collect_one_tfd(void *obj, ProtobufCMessage *msg)
+{
+ struct timerfd_file_info *info = obj;
+
+ info->tfe = pb_msg(msg, TimerfdFileEntry);
+ pr_info_timerfd("Collected ", info->tfe);
+ return file_desc_add(&info->d, info->tfe->id, &timerfd_desc_ops);
+}
+
+struct collect_image_info timerfd_cinfo = {
+ .fd_type = CR_FD_TIMERFD_FILE,
+ .pb_type = PB_TIMERFD_FILE,
+ .priv_size = sizeof(struct timerfd_file_info),
+ .collect = collect_one_tfd,
+};
diff --git a/tty.c b/tty.c
index 2ad76cb..553d64f 100644
--- a/tty.c
+++ b/tty.c
@@ -645,7 +645,7 @@ err:
return -1;
}
-static int tty_open(struct file_desc *d)
+static int open_tty(struct file_desc *d, int pid)
{
struct tty_info *info = container_of(d, struct tty_info, d);
@@ -682,7 +682,7 @@ static struct list_head *tty_select_pslist(struct file_desc *d, struct rst_info
static struct file_desc_ops tty_desc_ops = {
.type = FD_TYPES__TTY,
- .open = tty_open,
+ .open = open_tty,
.post_open = tty_restore_ctl_terminal,
.want_transport = tty_transport,
.select_ps_list = tty_select_pslist,
diff --git a/tun.c b/tun.c
index d453015..194585d 100644
--- a/tun.c
+++ b/tun.c
@@ -318,7 +318,7 @@ struct tunfile_info {
TunfileEntry *tfe;
};
-static int tunfile_open(struct file_desc *d)
+static int open_tunfile(struct file_desc *d, int pid)
{
int fd;
struct tunfile_info *ti;
@@ -375,7 +375,7 @@ err:
static struct file_desc_ops tunfile_desc_ops = {
.type = FD_TYPES__TUN,
- .open = tunfile_open,
+ .open = open_tunfile,
};
static int collect_one_tunfile(void *o, ProtobufCMessage *base)
--
1.9.rc0.143.g6fd479e
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