--- /dev/null
+From: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
+Date: Tue, 17 Apr 2012 09:30:15 +0200
+Subject: [PATCH] libc: add posix_fallocate()
+
+Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
+---
+ create mode 100644 libc/sysdeps/linux/common/posix_fallocate.c
+ create mode 100644 libc/sysdeps/linux/common/posix_fallocate64.c
+ create mode 100644 test/unistd/tst-posix_fallocate.c
+ create mode 100644 test/unistd/tst-posix_fallocate64.c
+
+--- a/include/fcntl.h
++++ b/include/fcntl.h
+@@ -210,9 +210,7 @@ extern int posix_fadvise64 (int __fd, __
+
+ #endif
+
+-#if 0 /* && defined __UCLIBC_HAS_ADVANCED_REALTIME__ */
+-
+-/* FIXME -- uClibc should probably implement these... */
++#if defined __UCLIBC_HAS_ADVANCED_REALTIME__
+
+ /* Reserve storage for the data of the file associated with FD.
+
+--- a/libc/sysdeps/linux/common/Makefile.in
++++ b/libc/sysdeps/linux/common/Makefile.in
+@@ -81,7 +81,8 @@ CSRC-$(UCLIBC_HAS_REALTIME) += clock_get
+ sched_get_priority_max.c sched_get_priority_min.c sched_getscheduler.c \
+ sched_rr_get_interval.c sched_setparam.c sched_setscheduler.c sigqueue.c
+ # clock_getcpuclockid|clock_nanosleep|mq_timedreceive|mq_timedsend|posix_fadvise|posix_fallocate|posix_madvise|posix_memalign|posix_mem_offset|posix_spawnattr_destroy|posix_spawnattr_init|posix_spawnattr_getflags|posix_spawnattr_setflags|posix_spawnattr_getpgroup|posix_spawnattr_setpgroup|posix_spawnattr_getschedparam|posix_spawnattr_setschedparam|posix_spawnattr_getschedpolicy|posix_spawnattr_setschedpolicy|posix_spawnattr_getsigdefault|posix_spawnattr_setsigdefault|posix_spawnattr_getsigmask|posix_spawnattr_setsigmask|posix_spawnattr_init|posix_spawnattr_setflags|posix_spawnattr_setpgroup|posix_spawnattr_setschedparam|posix_spawnattr_setschedpolicy|posix_spawnattr_setsigdefault|posix_spawnattr_setsigmask|posix_spawn_file_actions_addclose|posix_spawn_file_actions_addopen|posix_spawn_file_actions_adddup2|posix_spawn_file_actions_addopen|posix_spawn_file_actions_destroy|posix_spawn_file_actions_init|posix_spawn_file_actions_init|posix_spawn|posix_spawnp|posix_spawnp|posix_typed_mem_get_info|pthread_mutex_timedlock|sem_timedwait
+-CSRC-$(UCLIBC_HAS_ADVANCED_REALTIME) += posix_fadvise64.c posix_fadvise.c posix_madvise.c
++CSRC-$(UCLIBC_HAS_ADVANCED_REALTIME) += posix_fadvise64.c posix_fadvise.c posix_madvise.c \
++ posix_fallocate.c posix_fallocate64.c
+ CSRC-$(UCLIBC_SUSV4_LEGACY) += utime.c
+ CSRC-$(UCLIBC_HAS_EPOLL) += epoll.c
+ CSRC-$(UCLIBC_HAS_XATTR) += xattr.c
+--- a/libc/sysdeps/linux/common/bits/kernel-features.h
++++ b/libc/sysdeps/linux/common/bits/kernel-features.h
+@@ -494,6 +494,14 @@
+ # define __ASSUME_PRIVATE_FUTEX 1
+ #endif
+
++/* Support for fallocate was added in 2.6.23,
++ on s390 only after 2.6.23-rc1, on alpha only after 2.6.33-rc1. */
++#if __LINUX_KERNEL_VERSION >= 0x020617 \
++ && (!defined __s390__ || __LINUX_KERNEL_VERSION >= 0x020618) \
++ && (!defined __alpha__ || __LINUX_KERNEL_VERSION >= 0x020621)
++# define __ASSUME_FALLOCATE 1
++#endif
++
+ /* getcpu is a syscall for x86-64 since 3.1. */
+ #if defined __x86_64__ && __LINUX_KERNEL_VERSION >= 0x030100
+ # define __ASSUME_GETCPU_SYSCALL 1
+--- /dev/null
++++ b/libc/sysdeps/linux/common/posix_fallocate.c
+@@ -0,0 +1,43 @@
++/* vi: set sw=4 ts=4: */
++/*
++ * posix_fallocate() for uClibc
++ * http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
++ *
++ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
++ *
++ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
++ */
++
++#include <sys/syscall.h>
++#include <fcntl.h>
++#include <bits/kernel-features.h>
++#include <stdint.h>
++
++#if defined __NR_fallocate
++int posix_fallocate(int fd, __off_t offset, __off_t len)
++{
++ int ret;
++
++# if __WORDSIZE == 32
++ uint32_t off_low = offset;
++ uint32_t len_low = len;
++ /* may assert that these >>31 are 0 */
++ uint32_t zero = 0;
++ INTERNAL_SYSCALL_DECL(err);
++ ret = (int) (INTERNAL_SYSCALL(fallocate, err, 6, fd, 0,
++ __LONG_LONG_PAIR (zero, off_low),
++ __LONG_LONG_PAIR (zero, len_low)));
++# elif __WORDSIZE == 64
++ INTERNAL_SYSCALL_DECL(err);
++ ret = (int) (INTERNAL_SYSCALL(fallocate, err, 4, fd, 0, offset, len));
++# else
++# error your machine is neither 32 bit or 64 bit ... it must be magical
++#endif
++ if (unlikely(INTERNAL_SYSCALL_ERROR_P (ret, err)))
++ return INTERNAL_SYSCALL_ERRNO (ret, err);
++ return 0;
++}
++# if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 64
++strong_alias(posix_fallocate,posix_fallocate64)
++# endif
++#endif
+--- /dev/null
++++ b/libc/sysdeps/linux/common/posix_fallocate64.c
+@@ -0,0 +1,39 @@
++/* vi: set sw=4 ts=4: */
++/*
++ * posix_fallocate() for uClibc
++ * http://www.opengroup.org/onlinepubs/9699919799/functions/posix_fallocate.html
++ *
++ * Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
++ *
++ * Licensed under the LGPL v2.1 or later, see the file COPYING.LIB in this tarball.
++ */
++
++#include <sys/syscall.h>
++#include <fcntl.h>
++#include <bits/kernel-features.h>
++#include <stdint.h>
++
++#if defined __NR_fallocate
++
++# if __WORDSIZE == 64
++/* Can use normal posix_fallocate() */
++# elif __WORDSIZE == 32
++int posix_fallocate64(int fd, __off64_t offset, __off64_t len)
++{
++ int ret;
++ uint32_t off_low = offset & 0xffffffff;
++ uint32_t off_high = offset >> 32;
++ uint32_t len_low = len & 0xffffffff;
++ uint32_t len_high = len >> 32;
++ INTERNAL_SYSCALL_DECL(err);
++ ret = (int) (INTERNAL_SYSCALL(fallocate, err, 6, fd, 0,
++ __LONG_LONG_PAIR (off_high, off_low),
++ __LONG_LONG_PAIR (len_high, len_low)));
++ if (unlikely(INTERNAL_SYSCALL_ERROR_P (ret, err)))
++ return INTERNAL_SYSCALL_ERRNO (ret, err);
++ return 0;
++}
++# else
++# error your machine is neither 32 bit or 64 bit ... it must be magical
++# endif
++#endif
+--- a/test/.gitignore
++++ b/test/.gitignore
+@@ -302,6 +302,8 @@ unistd/getcwd
+ unistd/getopt
+ unistd/getopt_long
+ unistd/tstgetopt
++unistd/tst-posix_fallocate
++unistd/tst-posix_fallocate64
+ unistd/tst-preadwrite
+ unistd/tst-preadwrite64
+ unistd/vfork
+--- a/test/unistd/Makefile.in
++++ b/test/unistd/Makefile.in
+@@ -2,7 +2,10 @@
+ # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
+
+ ifeq ($(UCLIBC_HAS_LFS),)
+-TESTS_DISABLED := tst-preadwrite64
++TESTS_DISABLED := tst-preadwrite64 tst-posix_fallocate64
++endif
++ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),)
++TESTS_DISABLED := tst-posix_fallocate
+ endif
+ OPTS_getopt := -abcXXX -9
+ OPTS_getopt_long := --add XXX --delete YYY --verbose
+--- /dev/null
++++ b/test/unistd/tst-posix_fallocate.c
+@@ -0,0 +1,127 @@
++#include <fcntl.h>
++#include <sys/stat.h>
++
++#ifndef TST_POSIX_FALLOCATE64
++# define stat64 stat
++# define fstat64 fstat
++# else
++# ifndef O_LARGEFILE
++# error no O_LARGEFILE but you want to test with LFS enabled
++# endif
++#endif
++
++static void do_prepare (void);
++#define PREPARE(argc, argv) do_prepare ()
++static int do_test (void);
++#define TEST_FUNCTION do_test ()
++#include <test-skeleton.c>
++
++static int fd;
++static void
++do_prepare (void)
++{
++ fd = create_temp_file ("tst-posix_fallocate.", NULL);
++ if (fd == -1)
++ {
++ printf ("cannot create temporary file: %m\n");
++ exit (1);
++ }
++}
++
++
++static int
++do_test (void)
++{
++ struct stat64 st;
++
++ if (fstat64 (fd, &st) != 0)
++ {
++ puts ("1st fstat failed");
++ return 1;
++ }
++
++ if (st.st_size != 0)
++ {
++ puts ("file not created with size 0");
++ return 1;
++ }
++
++ if (posix_fallocate (fd, 512, 768) != 0)
++ {
++ puts ("1st posix_fallocate call failed");
++ return 1;
++ }
++
++ if (fstat64 (fd, &st) != 0)
++ {
++ puts ("2nd fstat failed");
++ return 1;
++ }
++
++ if (st.st_size != 512 + 768)
++ {
++ printf ("file size after 1st posix_fallocate call is %llu, expected %u\n",
++ (unsigned long long int) st.st_size, 512u + 768u);
++ return 1;
++ }
++
++ if (posix_fallocate (fd, 0, 1024) != 0)
++ {
++ puts ("2nd posix_fallocate call failed");
++ return 1;
++ }
++
++ if (fstat64 (fd, &st) != 0)
++ {
++ puts ("3rd fstat failed");
++ return 1;
++ }
++
++ if (st.st_size != 512 + 768)
++ {
++ puts ("file size changed in 2nd posix_fallocate");
++ return 1;
++ }
++
++ if (posix_fallocate (fd, 2048, 64) != 0)
++ {
++ puts ("3rd posix_fallocate call failed");
++ return 1;
++ }
++
++ if (fstat64 (fd, &st) != 0)
++ {
++ puts ("4th fstat failed");
++ return 1;
++ }
++
++ if (st.st_size != 2048 + 64)
++ {
++ printf ("file size after 3rd posix_fallocate call is %llu, expected %u\n",
++ (unsigned long long int) st.st_size, 2048u + 64u);
++ return 1;
++ }
++#ifdef TST_POSIX_FALLOCATE64
++ if (posix_fallocate64 (fd, 4097ULL, 4294967295ULL + 2ULL) != 0)
++ {
++ puts ("4th posix_fallocate call failed");
++ return 1;
++ }
++
++ if (fstat64 (fd, &st) != 0)
++ {
++ puts ("5th fstat failed");
++ return 1;
++ }
++
++ if (st.st_size != 4097ULL + 4294967295ULL + 2ULL)
++ {
++ printf ("file size after 4th posix_fallocate call is %llu, expected %llu\n",
++ (unsigned long long int) st.st_size, 4097ULL + 4294967295ULL + 2ULL);
++ return 1;
++ }
++#endif
++ close (fd);
++
++ return 0;
++}
+--- /dev/null
++++ b/test/unistd/tst-posix_fallocate64.c
+@@ -0,0 +1,2 @@
++#define TST_POSIX_FALLOCATE64
++#include "tst-posix_fallocate.c"
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