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diff --git a/contrib/libs/libaio/COPYING b/contrib/libs/libaio/COPYING
new file mode 100644
index 0000000000..c4792dd27a
--- /dev/null
+++ b/contrib/libs/libaio/COPYING
@@ -0,0 +1,515 @@
+
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diff --git a/contrib/libs/libaio/ChangeLog b/contrib/libs/libaio/ChangeLog
new file mode 100644
index 0000000000..b1536b4aab
--- /dev/null
+++ b/contrib/libs/libaio/ChangeLog
@@ -0,0 +1,54 @@
+0.3.107
+	- Make tests compile again on modern systems (warnings + -Werror)
+	- Add 'make partcheck' and don't require manual setup for testing.
+	- Change test harness to compile against this dir, not global install
+	- Fix 5.t for archs where PROT_WRITE mappings are readable.
+	- Allow sending of SIGXFSZ on aio over limits
+	- Explicitly specify bash for runtests.sh
+	- Put deprecating comments on never-merged io_prep_poll
+	- Add io_prep_preadv and io_prep_pwritev
+	- Add eventfd support (io_set_eventfd).
+
+0.4.0
+	- remove libredhat-kernel
+	- add rough outline for man pages
+	- make the compiled io_getevents() add the extra parameter and 
+	  pass the timeout for updating as per 2.5
+	- fixes for ia64, now works
+	- fixes for x86-64
+	- powerpc support from Gianni Tedesco <gianni@ecsc.co.uk>
+	- disable the NULL check in harness/cases/4.t on ia64: ia64 
+	  maps the 0 page and causes this check to fail.
+
+0.3.15
+	- use real syscall interface, but don't break source compatibility 
+	  yet (that will happen with 0.4.0)
+
+0.3.13
+	- add test cases
+
+0.3.11
+	- use library versioning of libredhat-kernel to always provide a 
+	  fallback
+
+0.3.9
+	- add io_queue_release function
+
+0.3.8
+	- make clean deletes libredhat-kernel.so.1
+	- const struct timespec *
+	- add make srpm target
+
+0.3.7
+	- fix assembly function .types
+	- export io_getevents
+	- fix io_submit function prototype to match the kernel
+	- provide /usr/lib/libredhat-kernel.so link for compilation
+	  (do NOT link against libredhat-kernel.so directly)
+	- fix soname to libaio.so.1
+	- fix dummy libredhat-kernel's soname
+	- work around nfs bug
+	- provide and install libredhat-kernel.so.1 stub
+	- Makefile improvements
+	- make sure dummy libredhat-kernel.so only returns -ENOSYS
+
diff --git a/contrib/libs/libaio/INSTALL b/contrib/libs/libaio/INSTALL
new file mode 100644
index 0000000000..29b907797a
--- /dev/null
+++ b/contrib/libs/libaio/INSTALL
@@ -0,0 +1,18 @@
+To install the library, execute the command:
+
+	make prefix=`pwd`/usr install
+
+which will install the binaries and header files into the directory 
+usr.  Set prefix=/usr to get them installed into the main system.
+
+Please note:  Do not attempt to install on the system the
+"libredhat-kernel.so" file.  It is a dummy shared library
+provided only for the purpose of being able to bootstrap
+this facility while running on systems without the correct
+libredhat-kernel.so built.  The contents of the included
+libredhat-kernel.so are only stubs; this library is NOT
+functional for anything except the internal purpose of
+linking libaio.so against the provided stubs.  At runtime,
+libaio.so requires a real libredhat-kernel.so library; this
+is provided by the Red Hat kernel RPM packages with async
+I/O functionality.
diff --git a/contrib/libs/libaio/README.md b/contrib/libs/libaio/README.md
new file mode 100644
index 0000000000..692f4a7bc7
--- /dev/null
+++ b/contrib/libs/libaio/README.md
@@ -0,0 +1,12 @@
+# libaio
+
+The Linux-native asynchronous I/O facility ("async I/O", or "aio") has a
+richer API and capability set than the simple POSIX async I/O facility.
+This library, libaio, provides the Linux-native API for async I/O.
+The POSIX async I/O facility requires this library in order to provide
+kernel-accelerated async I/O capabilities, as do applications which
+require the Linux-native async I/O API.
+
+## Contributing
+
+Patches should be submitted to linux-aio@kvack.org.
diff --git a/contrib/libs/libaio/include/libaio.h b/contrib/libs/libaio/include/libaio.h
new file mode 100644
index 0000000000..5e44af4ef4
--- /dev/null
+++ b/contrib/libs/libaio/include/libaio.h
@@ -0,0 +1 @@
+#include "../src/libaio.h" /* inclink generated by yamaker */
diff --git a/contrib/libs/libaio/src/aio_ring.h b/contrib/libs/libaio/src/aio_ring.h
new file mode 100644
index 0000000000..3842c4b3c1
--- /dev/null
+++ b/contrib/libs/libaio/src/aio_ring.h
@@ -0,0 +1,49 @@
+/*
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#ifndef _AIO_RING_H
+#define _AIO_RING_H
+
+#define AIO_RING_MAGIC                  0xa10a10a1
+
+struct aio_ring {
+	unsigned        id;     /* kernel internal index number */
+	unsigned        nr;     /* number of io_events */
+	unsigned        head;
+	unsigned        tail;
+
+	unsigned        magic;
+	unsigned        compat_features;
+	unsigned        incompat_features;
+	unsigned        header_length;  /* size of aio_ring */
+};
+
+static inline int aio_ring_is_empty(io_context_t ctx, struct timespec *timeout)
+{
+	struct aio_ring *ring = (struct aio_ring *)ctx;
+
+	if (!ring || ring->magic != AIO_RING_MAGIC)
+		return 0;
+	if (!timeout || timeout->tv_sec || timeout->tv_nsec)
+		return 0;
+	if (ring->head != ring->tail)
+		return 0;
+	return 1;
+}
+
+#endif /* _AIO_RING_H */
diff --git a/contrib/libs/libaio/src/io_cancel.c b/contrib/libs/libaio/src/io_cancel.c
new file mode 100644
index 0000000000..4daff08919
--- /dev/null
+++ b/contrib/libs/libaio/src/io_cancel.c
@@ -0,0 +1,22 @@
+/* io_cancel.c
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include "syscall.h"
+
+io_syscall3(int, io_cancel, io_cancel, io_context_t, ctx, struct iocb *, iocb, struct io_event *, event)
diff --git a/contrib/libs/libaio/src/io_destroy.c b/contrib/libs/libaio/src/io_destroy.c
new file mode 100644
index 0000000000..0ab6bd1743
--- /dev/null
+++ b/contrib/libs/libaio/src/io_destroy.c
@@ -0,0 +1,23 @@
+/* io_destroy
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <errno.h>
+#include <libaio.h>
+#include "syscall.h"
+
+io_syscall1(int, io_destroy, io_destroy, io_context_t, ctx)
diff --git a/contrib/libs/libaio/src/io_getevents.c b/contrib/libs/libaio/src/io_getevents.c
new file mode 100644
index 0000000000..b82325bf24
--- /dev/null
+++ b/contrib/libs/libaio/src/io_getevents.c
@@ -0,0 +1,35 @@
+/* io_getevents.c
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include "syscall.h"
+#include "aio_ring.h"
+
+io_syscall5(int, __io_getevents_0_4, io_getevents, io_context_t, ctx, long, min_nr, long, nr, struct io_event *, events, struct timespec *, timeout)
+
+int io_getevents(io_context_t ctx, long min_nr, long nr, struct io_event * events, struct timespec * timeout)
+{
+	if (aio_ring_is_empty(ctx, timeout))
+		return 0;
+	return __io_getevents_0_4(ctx, min_nr, nr, events, timeout);
+}
+
+// DEFSYMVER(io_getevents_0_4, io_getevents, 0.4)
diff --git a/contrib/libs/libaio/src/io_pgetevents.c b/contrib/libs/libaio/src/io_pgetevents.c
new file mode 100644
index 0000000000..e6b0614688
--- /dev/null
+++ b/contrib/libs/libaio/src/io_pgetevents.c
@@ -0,0 +1,56 @@
+/*
+   libaio Linux async I/O interface
+   Copyright 2018 Christoph Hellwig.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+#include <signal.h>
+#include "syscall.h"
+#include "aio_ring.h"
+
+#ifdef __NR_io_pgetevents
+io_syscall6(int, __io_pgetevents, io_pgetevents, io_context_t, ctx, long,
+		min_nr, long, nr, struct io_event *, events,
+		struct timespec *, timeout, void *, sigmask);
+
+int io_pgetevents(io_context_t ctx, long min_nr, long nr,
+		struct io_event *events, struct timespec *timeout,
+		sigset_t *sigmask)
+{
+	struct {
+		unsigned long ss;
+		unsigned long ss_len;
+	} data;
+
+	if (aio_ring_is_empty(ctx, timeout))
+		return 0;
+
+	data.ss = (unsigned long)sigmask;
+	data.ss_len = _NSIG / 8;
+	return __io_pgetevents(ctx, min_nr, nr, events, timeout, &data);
+}
+#else
+int io_pgetevents(io_context_t ctx, long min_nr, long nr,
+		struct io_event *events, struct timespec *timeout,
+		sigset_t *sigmask)
+
+{
+	return -ENOSYS;
+}
+#endif /* __NR_io_pgetevents */
diff --git a/contrib/libs/libaio/src/io_queue_init.c b/contrib/libs/libaio/src/io_queue_init.c
new file mode 100644
index 0000000000..563d1375a4
--- /dev/null
+++ b/contrib/libs/libaio/src/io_queue_init.c
@@ -0,0 +1,33 @@
+/* io_queue_init.c
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include "syscall.h"
+
+int io_queue_init(int maxevents, io_context_t *ctxp)
+{
+	if (maxevents > 0) {
+		*ctxp = NULL;
+		return io_setup(maxevents, ctxp);
+	}
+	return -EINVAL;
+}
diff --git a/contrib/libs/libaio/src/io_queue_release.c b/contrib/libs/libaio/src/io_queue_release.c
new file mode 100644
index 0000000000..94bbb867a0
--- /dev/null
+++ b/contrib/libs/libaio/src/io_queue_release.c
@@ -0,0 +1,27 @@
+/* io_queue_release.c
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+int io_queue_release(io_context_t ctx)
+{
+	return io_destroy(ctx);
+}
diff --git a/contrib/libs/libaio/src/io_queue_run.c b/contrib/libs/libaio/src/io_queue_run.c
new file mode 100644
index 0000000000..e0132f4009
--- /dev/null
+++ b/contrib/libs/libaio/src/io_queue_run.c
@@ -0,0 +1,39 @@
+/* io_submit
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <libaio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <time.h>
+
+int io_queue_run(io_context_t ctx)
+{
+	static struct timespec timeout = { 0, 0 };
+	struct io_event event;
+	int ret;
+
+	/* FIXME: batch requests? */
+	while (1 == (ret = io_getevents(ctx, 0, 1, &event, &timeout))) {
+		io_callback_t cb = (io_callback_t)event.data;
+		struct iocb *iocb = event.obj;
+
+		cb(ctx, iocb, event.res, event.res2);
+	}
+
+	return ret;
+}
diff --git a/contrib/libs/libaio/src/io_queue_wait.c b/contrib/libs/libaio/src/io_queue_wait.c
new file mode 100644
index 0000000000..64271ebdad
--- /dev/null
+++ b/contrib/libs/libaio/src/io_queue_wait.c
@@ -0,0 +1,30 @@
+/* io_submit
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#define NO_SYSCALL_ERRNO
+#include <sys/types.h>
+#include <libaio.h>
+#include <errno.h>
+#include "syscall.h"
+
+struct timespec;
+
+int io_queue_wait(io_context_t ctx, struct timespec *timeout)
+{
+	return io_getevents(ctx, 0, 0, NULL, timeout);
+}
diff --git a/contrib/libs/libaio/src/io_setup.c b/contrib/libs/libaio/src/io_setup.c
new file mode 100644
index 0000000000..4ba1afc993
--- /dev/null
+++ b/contrib/libs/libaio/src/io_setup.c
@@ -0,0 +1,23 @@
+/* io_setup
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <errno.h>
+#include <libaio.h>
+#include "syscall.h"
+
+io_syscall2(int, io_setup, io_setup, int, maxevents, io_context_t *, ctxp)
diff --git a/contrib/libs/libaio/src/io_submit.c b/contrib/libs/libaio/src/io_submit.c
new file mode 100644
index 0000000000..e22ba54960
--- /dev/null
+++ b/contrib/libs/libaio/src/io_submit.c
@@ -0,0 +1,23 @@
+/* io_submit
+   libaio Linux async I/O interface
+   Copyright 2002 Red Hat, Inc.
+
+   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 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, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#include <errno.h>
+#include <libaio.h>
+#include "syscall.h"
+
+io_syscall3(int, io_submit, io_submit, io_context_t, ctx, long, nr, struct iocb **, iocbs)
diff --git a/contrib/libs/libaio/src/libaio.h b/contrib/libs/libaio/src/libaio.h
new file mode 100644
index 0000000000..24b4b8accb
--- /dev/null
+++ b/contrib/libs/libaio/src/libaio.h
@@ -0,0 +1,302 @@
+/* /usr/include/libaio.h
+ *
+ * Copyright 2000,2001,2002 Red Hat, Inc.
+ *
+ * Written by Benjamin LaHaise <bcrl@redhat.com>
+ *
+ * libaio Linux async I/O interface
+ *
+ * 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 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307  USA
+ */
+#ifndef __LIBAIO_H
+#define __LIBAIO_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <sys/types.h>
+#include <string.h>
+#include <signal.h>
+
+struct timespec;
+struct sockaddr;
+struct iovec;
+
+typedef struct io_context *io_context_t;
+
+typedef enum io_iocb_cmd {
+	IO_CMD_PREAD = 0,
+	IO_CMD_PWRITE = 1,
+
+	IO_CMD_FSYNC = 2,
+	IO_CMD_FDSYNC = 3,
+
+	IO_CMD_POLL = 5,
+	IO_CMD_NOOP = 6,
+	IO_CMD_PREADV = 7,
+	IO_CMD_PWRITEV = 8,
+} io_iocb_cmd_t;
+
+/* little endian, 32 bits */
+#if defined(__i386__) || (defined(__arm__) && !defined(__ARMEB__)) || \
+    defined(__sh__) || defined(__bfin__) || defined(__MIPSEL__) || \
+    defined(__cris__) || defined(__loongarch32) || \
+    (defined(__riscv) && __riscv_xlen == 32) || \
+    (defined(__GNUC__) && defined(__BYTE_ORDER__) && \
+         __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_LONG__ == 4)
+#define PADDED(x, y)	x; unsigned y
+#define PADDEDptr(x, y)	x; unsigned y
+#define PADDEDul(x, y)	unsigned long x; unsigned y
+
+/* little endian, 64 bits */
+#elif defined(__ia64__) || defined(__x86_64__) || defined(__alpha__) || \
+      (defined(__aarch64__) && defined(__AARCH64EL__)) || \
+      defined(__loongarch64) || \
+      (defined(__riscv) && __riscv_xlen == 64) || \
+      (defined(__GNUC__) && defined(__BYTE_ORDER__) && \
+          __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && __SIZEOF_LONG__ == 8)
+#define PADDED(x, y)	x, y
+#define PADDEDptr(x, y)	x
+#define PADDEDul(x, y)	unsigned long x
+
+/* big endian, 64 bits */
+#elif defined(__powerpc64__) || defined(__s390x__) || \
+      (defined(__sparc__) && defined(__arch64__)) || \
+      (defined(__aarch64__) && defined(__AARCH64EB__)) || \
+      (defined(__GNUC__) && defined(__BYTE_ORDER__) && \
+           __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_LONG__ == 8)
+#define PADDED(x, y)	unsigned y; x
+#define PADDEDptr(x,y)	x
+#define PADDEDul(x, y)	unsigned long x
+
+/* big endian, 32 bits */
+#elif defined(__PPC__) || defined(__s390__) || \
+      (defined(__arm__) && defined(__ARMEB__)) || \
+      defined(__sparc__) || defined(__MIPSEB__) || defined(__m68k__) || \
+      defined(__hppa__) || defined(__frv__) || defined(__avr32__) || \
+      (defined(__GNUC__) && defined(__BYTE_ORDER__) && \
+           __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && __SIZEOF_LONG__ == 4)
+#define PADDED(x, y)	unsigned y; x
+#define PADDEDptr(x, y)	unsigned y; x
+#define PADDEDul(x, y)	unsigned y; unsigned long x
+
+#else
+#error	endian?
+#endif
+
+struct io_iocb_poll {
+	PADDED(int events, __pad1);
+};	/* result code is the set of result flags or -'ve errno */
+
+struct io_iocb_sockaddr {
+	PADDEDptr(struct sockaddr *addr, __pad1);
+	PADDEDul(len, __pad2);
+};	/* result code is the length of the sockaddr, or -'ve errno */
+
+struct io_iocb_common {
+	PADDEDptr(void	*buf, __pad1);
+	PADDEDul(nbytes, __pad2);
+	long long	offset;
+	long long	__pad3;
+	unsigned	flags;
+	unsigned	resfd;
+};	/* result code is the amount read or -'ve errno */
+
+struct io_iocb_vector {
+	PADDEDptr(const struct iovec *vec, __pad1);
+	PADDEDul(nr, __pad2);
+	long long		offset;
+};	/* result code is the amount read or -'ve errno */
+
+struct iocb {
+	PADDEDptr(void *data, __pad1);	/* Return in the io completion event */
+	/* key: For use in identifying io requests */
+	/* aio_rw_flags: RWF_* flags (such as RWF_NOWAIT) */
+	PADDED(unsigned key, aio_rw_flags);
+
+	short		aio_lio_opcode;	
+	short		aio_reqprio;
+	int		aio_fildes;
+
+	union {
+		struct io_iocb_common		c;
+		struct io_iocb_vector		v;
+		struct io_iocb_poll		poll;
+		struct io_iocb_sockaddr	saddr;
+	} u;
+};
+
+struct io_event {
+	PADDEDptr(void *data, __pad1);
+	PADDEDptr(struct iocb *obj,  __pad2);
+	PADDEDul(res,  __pad3);
+	PADDEDul(res2, __pad4);
+};
+
+#undef PADDED
+#undef PADDEDptr
+#undef PADDEDul
+
+typedef void (*io_callback_t)(io_context_t ctx, struct iocb *iocb, long res, long res2);
+
+/* library wrappers */
+extern int io_queue_init(int maxevents, io_context_t *ctxp);
+/*extern int io_queue_grow(io_context_t ctx, int new_maxevents);*/
+extern int io_queue_release(io_context_t ctx);
+/*extern int io_queue_wait(io_context_t ctx, struct timespec *timeout);*/
+extern int io_queue_run(io_context_t ctx);
+
+/* Actual syscalls */
+extern int io_setup(int maxevents, io_context_t *ctxp);
+extern int io_destroy(io_context_t ctx);
+extern int io_submit(io_context_t ctx, long nr, struct iocb *ios[]);
+extern int io_cancel(io_context_t ctx, struct iocb *iocb, struct io_event *evt);
+extern int io_getevents(io_context_t ctx, long min_nr, long nr, struct io_event *events, struct timespec *timeout);
+extern int io_pgetevents(io_context_t ctx, long min_nr, long nr,
+		struct io_event *events, struct timespec *timeout,
+		sigset_t *sigmask);
+
+
+static inline void io_set_callback(struct iocb *iocb, io_callback_t cb)
+{
+	iocb->data = (void *)cb;
+}
+
+static inline void io_prep_pread(struct iocb *iocb, int fd, void *buf, size_t count, long long offset)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PREAD;
+	iocb->aio_reqprio = 0;
+	iocb->u.c.buf = buf;
+	iocb->u.c.nbytes = count;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_pwrite(struct iocb *iocb, int fd, void *buf, size_t count, long long offset)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PWRITE;
+	iocb->aio_reqprio = 0;
+	iocb->u.c.buf = buf;
+	iocb->u.c.nbytes = count;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_preadv(struct iocb *iocb, int fd, const struct iovec *iov, int iovcnt, long long offset)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PREADV;
+	iocb->aio_reqprio = 0;
+	iocb->u.c.buf = (void *)iov;
+	iocb->u.c.nbytes = iovcnt;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_pwritev(struct iocb *iocb, int fd, const struct iovec *iov, int iovcnt, long long offset)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PWRITEV;
+	iocb->aio_reqprio = 0;
+	iocb->u.c.buf = (void *)iov;
+	iocb->u.c.nbytes = iovcnt;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_preadv2(struct iocb *iocb, int fd, const struct iovec *iov, int iovcnt, long long offset, int flags)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PREADV;
+	iocb->aio_reqprio = 0;
+	iocb->aio_rw_flags = flags;
+	iocb->u.c.buf = (void *)iov;
+	iocb->u.c.nbytes = iovcnt;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_pwritev2(struct iocb *iocb, int fd, const struct iovec *iov, int iovcnt, long long offset, int flags)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_PWRITEV;
+	iocb->aio_reqprio = 0;
+	iocb->aio_rw_flags = flags;
+	iocb->u.c.buf = (void *)iov;
+	iocb->u.c.nbytes = iovcnt;
+	iocb->u.c.offset = offset;
+}
+
+static inline void io_prep_poll(struct iocb *iocb, int fd, int events)
+{
+        memset(iocb, 0, sizeof(*iocb));
+        iocb->aio_fildes = fd;
+        iocb->aio_lio_opcode = IO_CMD_POLL;
+        iocb->aio_reqprio = 0;
+        iocb->u.poll.events = events;
+}
+
+static inline int io_poll(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd, int events)
+{
+        io_prep_poll(iocb, fd, events);
+        io_set_callback(iocb, cb);
+        return io_submit(ctx, 1, &iocb);
+}
+
+static inline void io_prep_fsync(struct iocb *iocb, int fd)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_FSYNC;
+	iocb->aio_reqprio = 0;
+}
+
+static inline int io_fsync(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd)
+{
+	io_prep_fsync(iocb, fd);
+	io_set_callback(iocb, cb);
+	return io_submit(ctx, 1, &iocb);
+}
+
+static inline void io_prep_fdsync(struct iocb *iocb, int fd)
+{
+	memset(iocb, 0, sizeof(*iocb));
+	iocb->aio_fildes = fd;
+	iocb->aio_lio_opcode = IO_CMD_FDSYNC;
+	iocb->aio_reqprio = 0;
+}
+
+static inline int io_fdsync(io_context_t ctx, struct iocb *iocb, io_callback_t cb, int fd)
+{
+	io_prep_fdsync(iocb, fd);
+	io_set_callback(iocb, cb);
+	return io_submit(ctx, 1, &iocb);
+}
+
+static inline void io_set_eventfd(struct iocb *iocb, int eventfd)
+{
+	iocb->u.c.flags |= (1 << 0) /* IOCB_FLAG_RESFD */;
+	iocb->u.c.resfd = eventfd;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __LIBAIO_H */
diff --git a/contrib/libs/libaio/src/raw_syscall.c b/contrib/libs/libaio/src/raw_syscall.c
new file mode 100644
index 0000000000..c3fe4b8deb
--- /dev/null
+++ b/contrib/libs/libaio/src/raw_syscall.c
@@ -0,0 +1,19 @@
+#include "syscall.h"
+
+#if defined(__ia64__)
+/* based on code from glibc by Jes Sorensen */
+__asm__(".text\n"
+	".globl	__ia64_aio_raw_syscall\n"
+	".proc	__ia64_aio_raw_syscall\n"
+	"__ia64_aio_raw_syscall:\n"
+	"alloc r2=ar.pfs,1,0,8,0\n"
+	"mov r15=r32\n"
+	"break 0x100000\n"
+	";;"
+	"br.ret.sptk.few b0\n"
+	".size __ia64_aio_raw_syscall, . - __ia64_aio_raw_syscall\n"
+	".endp __ia64_aio_raw_syscall"
+);
+#endif
+
+;
diff --git a/contrib/libs/libaio/src/syscall-generic.h b/contrib/libs/libaio/src/syscall-generic.h
new file mode 100644
index 0000000000..b217b531be
--- /dev/null
+++ b/contrib/libs/libaio/src/syscall-generic.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+/*
+ * This is based on the include/uapi/asm-generic/unistd.h header file
+ * in the kernel, which is a generic syscall schema for new architectures.
+ */
+
+#define __NR_io_setup			0
+#define __NR_io_destroy			1
+#define __NR_io_submit			2
+#define __NR_io_cancel			3
+#define __NR_io_getevents		4
diff --git a/contrib/libs/libaio/src/syscall-x86_64.h b/contrib/libs/libaio/src/syscall-x86_64.h
new file mode 100644
index 0000000000..0eccef342e
--- /dev/null
+++ b/contrib/libs/libaio/src/syscall-x86_64.h
@@ -0,0 +1,6 @@
+#define __NR_io_setup		206
+#define __NR_io_destroy		207
+#define __NR_io_getevents	208
+#define __NR_io_submit		209
+#define __NR_io_cancel		210
+#define __NR_io_pgetevents	333
diff --git a/contrib/libs/libaio/src/syscall.h b/contrib/libs/libaio/src/syscall.h
new file mode 100644
index 0000000000..3a94a1195f
--- /dev/null
+++ b/contrib/libs/libaio/src/syscall.h
@@ -0,0 +1,73 @@
+#include <sys/syscall.h>
+#include <unistd.h>
+#include <errno.h>
+
+#define _SYMSTR(str)	#str
+#define SYMSTR(str)	_SYMSTR(str)
+
+#define SYMVER(compat_sym, orig_sym, ver_sym)	\
+	__asm__(".symver " SYMSTR(compat_sym) "," SYMSTR(orig_sym) "@LIBAIO_" SYMSTR(ver_sym));
+
+#define DEFSYMVER(compat_sym, orig_sym, ver_sym)	\
+	__asm__(".symver " SYMSTR(compat_sym) "," SYMSTR(orig_sym) "@@LIBAIO_" SYMSTR(ver_sym));
+
+#if defined(__i386__)
+#error #include "syscall-i386.h"
+#elif defined(__x86_64__)
+#include "syscall-x86_64.h"
+#elif defined(__ia64__)
+#error #include "syscall-ia64.h"
+#elif defined(__PPC__)
+#error #include "syscall-ppc.h"
+#elif defined(__s390__)
+#error #include "syscall-s390.h"
+#elif defined(__alpha__)
+#error #include "syscall-alpha.h"
+#elif defined(__arm__)
+#error #include "syscall-arm.h"
+#elif defined(__sparc__)
+#error #include "syscall-sparc.h"
+#elif defined(__aarch64__) || defined(__loongarch__) || defined(__riscv)
+#include "syscall-generic.h"
+#else
+#warning "using system call numbers from sys/syscall.h"
+#endif
+
+#define _body_io_syscall(sname, args...)	\
+{						\
+	int ret, saved_errno;			\
+	saved_errno = errno;			\
+	ret= syscall(__NR_##sname, ## args);	\
+	if (ret < 0) {				\
+		ret = -errno;			\
+		errno = saved_errno;		\
+	}					\
+	return ret;				\
+}
+
+#define io_syscall1(type,fname,sname,type1,arg1) \
+type fname(type1 arg1) \
+_body_io_syscall(sname, (long)arg1)
+
+#define io_syscall2(type,fname,sname,type1,arg1,type2,arg2) \
+type fname(type1 arg1,type2 arg2) \
+_body_io_syscall(sname, (long)arg1, (long)arg2)
+
+#define io_syscall3(type,fname,sname,type1,arg1,type2,arg2,type3,arg3) \
+type fname(type1 arg1,type2 arg2,type3 arg3) \
+_body_io_syscall(sname, (long)arg1, (long)arg2, (long)arg3)
+
+#define io_syscall4(type,fname,sname,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
+type fname (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
+_body_io_syscall(sname, (long)arg1, (long)arg2, (long)arg3, (long)arg4)
+
+#define io_syscall5(type,fname,sname,type1,arg1,type2,arg2,type3,arg3,type4,arg4, type5,arg5) \
+type fname (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
+_body_io_syscall(sname, (long)arg1, (long)arg2, (long)arg3, (long)arg4, (long)arg5)
+
+#define io_syscall6(type,fname,sname,type1,arg1,type2,arg2,type3,arg3, \
+		type4,arg4,type5,arg5,type6,arg6) \
+type fname (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, \
+		type6 arg6) \
+_body_io_syscall(sname, (long)arg1, (long)arg2, (long)arg3, (long)arg4, \
+               (long)arg5, (long)arg6)