Commit 0c8011d8 authored by Natanael Copa's avatar Natanael Copa
Browse files

main/libc0.9.32: backport posix_fallocate

from http://www.mail-archive.com/uclibc@uclibc.org/msg08105.html
parent 4cb986f7
From 987ccf6ee3cbb4bb6055d9f4c635bdaddf2377fc Mon Sep 17 00:00:00 2001
From: Natanael Copa <ncopa@alpinelinux.org>
Date: Tue, 12 Jun 2012 07:59:16 +0000
Subject: [PATCH] libc: add posix_fallocate
http://www.mail-archive.com/uclibc@uclibc.org/msg08105.html
---
include/fcntl.h | 4 +-
libc/sysdeps/linux/common/Makefile.in | 3 +-
libc/sysdeps/linux/common/bits/kernel-features.h | 8 ++
libc/sysdeps/linux/common/posix_fallocate.c | 43 ++++++++
libc/sysdeps/linux/common/posix_fallocate64.c | 39 +++++++
libc/sysdeps/linux/common/stubs.c | 16 +++
test/.gitignore | 1 +
test/unistd/Makefile.in | 3 +
test/unistd/tst-posix_fallocate.c | 121 ++++++++++++++++++++++
9 files changed, 234 insertions(+), 4 deletions(-)
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
diff --git a/include/fcntl.h b/include/fcntl.h
index 26ad1fe..c4a47af 100644
--- a/include/fcntl.h
+++ b/include/fcntl.h
@@ -210,9 +210,7 @@ extern int posix_fadvise64 (int __fd, __off64_t __offset, __off64_t __len,
#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.
diff --git a/libc/sysdeps/linux/common/Makefile.in b/libc/sysdeps/linux/common/Makefile.in
index 3b5763c..cddcd74 100644
--- a/libc/sysdeps/linux/common/Makefile.in
+++ b/libc/sysdeps/linux/common/Makefile.in
@@ -81,7 +81,8 @@ CSRC-$(UCLIBC_HAS_REALTIME) += clock_getres.c clock_gettime.c clock_settime.c \
sched_get_priority_max.c sched_get_priority_min.c sched_getscheduler.c \
sched_rr_get_interval.c sched_setparam.c sched_setscheduler.c sigqueue.c
# clock_getcpuclockid|clock_nanosleep|mq_timedreceive|mq_timedsend|posix_fadvise|posix_fallocate|posix_madvise|posix_memalign|posix_mem_offset|posix_spawnattr_destroy|posix_spawnattr_init|posix_spawnattr_getflags|posix_spawnattr_setflags|posix_spawnattr_getpgroup|posix_spawnattr_setpgroup|posix_spawnattr_getschedparam|posix_spawnattr_setschedparam|posix_spawnattr_getschedpolicy|posix_spawnattr_setschedpolicy|posix_spawnattr_getsigdefault|posix_spawnattr_setsigdefault|posix_spawnattr_getsigmask|posix_spawnattr_setsigmask|posix_spawnattr_init|posix_spawnattr_setflags|posix_spawnattr_setpgroup|posix_spawnattr_setschedparam|posix_spawnattr_setschedpolicy|posix_spawnattr_setsigdefault|posix_spawnattr_setsigmask|posix_spawn_file_actions_addclose|posix_spawn_file_actions_addopen|posix_spawn_file_actions_adddup2|posix_spawn_file_actions_addopen|posix_spawn_file_actions_destroy|posix_spawn_file_actions_init|posix_spawn_file_actions_init|posix_spawn|posix_spawnp|posix_spawnp|posix_typed_mem_get_info|pthread_mutex_timedlock|sem_timedwait
-CSRC-$(UCLIBC_HAS_ADVANCED_REALTIME) += posix_fadvise64.c posix_fadvise.c
+CSRC-$(UCLIBC_HAS_ADVANCED_REALTIME) += posix_fadvise64.c posix_fadvise.c \
+ posix_fallocate.c posix_fallocate64.c
CSRC-$(UCLIBC_SUSV4_LEGACY) += utime.c
CSRC-$(UCLIBC_HAS_EPOLL) += epoll.c
CSRC-$(UCLIBC_HAS_XATTR) += xattr.c
diff --git a/libc/sysdeps/linux/common/bits/kernel-features.h b/libc/sysdeps/linux/common/bits/kernel-features.h
index 5ea85d2..be00dda 100644
--- 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
diff --git a/libc/sysdeps/linux/common/posix_fallocate.c b/libc/sysdeps/linux/common/posix_fallocate.c
new file mode 100644
index 0000000..9aaa6ce
--- /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
diff --git a/libc/sysdeps/linux/common/posix_fallocate64.c b/libc/sysdeps/linux/common/posix_fallocate64.c
new file mode 100644
index 0000000..818d868
--- /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
diff --git a/libc/sysdeps/linux/common/stubs.c b/libc/sysdeps/linux/common/stubs.c
index 4d1e26c..43d8081 100644
--- a/libc/sysdeps/linux/common/stubs.c
+++ b/libc/sysdeps/linux/common/stubs.c
@@ -225,6 +225,22 @@ make_stub(pipe2)
make_stub(pivot_root)
#endif
+#if !defined __NR_fadvise64 && defined __UCLIBC_HAS_LFS__
+make_ret_stub(posix_fadvise)
+#endif
+
+#if !defined __NR_fadvise64_64 && defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 32
+make_ret_stub(posix_fadvise64)
+#endif
+
+#if !defined __NR_fallocate && defined __UCLIBC_HAS_ADVANCED_REALTIME__
+make_ret_stub(posix_fallocate)
+#endif
+
+#ifndef __NR_madvise
+make_ret_stub(posix_madvise)
+#endif
+
#if !defined __NR_ppoll && defined __UCLIBC_LINUX_SPECIFIC__
make_stub(ppoll)
#endif
diff --git a/test/.gitignore b/test/.gitignore
index c892816..14cb5d6 100644
--- a/test/.gitignore
+++ b/test/.gitignore
@@ -302,6 +302,7 @@ unistd/getcwd
unistd/getopt
unistd/getopt_long
unistd/tstgetopt
+unistd/tst-posix_fallocate
unistd/tst-preadwrite
unistd/tst-preadwrite64
unistd/vfork
diff --git a/test/unistd/Makefile.in b/test/unistd/Makefile.in
index c542f98..6583e42 100644
--- a/test/unistd/Makefile.in
+++ b/test/unistd/Makefile.in
@@ -4,6 +4,9 @@
ifeq ($(UCLIBC_HAS_LFS),)
TESTS_DISABLED := tst-preadwrite64
endif
+ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),)
+TESTS_DISABLED := tst-posix_fallocate
+endif
OPTS_getopt := -abcXXX -9
OPTS_getopt_long := --add XXX --delete YYY --verbose
ifeq ($(UCLIBC_HAS_GNU_GETOPT),y)
diff --git a/test/unistd/tst-posix_fallocate.c b/test/unistd/tst-posix_fallocate.c
new file mode 100644
index 0000000..eec50ea
--- /dev/null
+++ b/test/unistd/tst-posix_fallocate.c
@@ -0,0 +1,121 @@
+#include <fcntl.h>
+#include <sys/stat.h>
+
+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;
+#ifndef O_LARGEFILE
+# error no O_LARGEFILE
+#endif
+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;
+ }
+
+ 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 %u\n",
+ (unsigned long long int) st.st_size, 4097ULL + 4294967295ULL + 2ULL);
+ return 1;
+ }
+
+ close (fd);
+
+ return 0;
+}
--
1.7.10.3
......@@ -4,7 +4,7 @@ pkgname=libc$_abiver
_gitver=
pkgver=0.9.33.2
_ver=${pkgver/_/-}
pkgrel=2
pkgrel=3
pkgdesc="C library for developing embedded Linux systems"
url=http://uclibc.org
license="LGPL-2"
......@@ -34,6 +34,7 @@ source="http://uclibc.org/downloads/uClibc-${_ver}.tar.xz
0008-ldso-limited-support-for-ORIGIN-in-rpath.patch
eventfd.patch
uClibc-0.9.33-avahi.patch
0001-libc-add-posix_fallocate.patch
uclibcconfig.x86
uclibcconfig.x86_64
......@@ -138,6 +139,7 @@ d9611de57fb72b74c0b9e243b8e9165b 0007-libc-x86-fix-stack-unwinding-and-backtrac
12cf5330b092ee7e00d14909737abc70 0008-ldso-limited-support-for-ORIGIN-in-rpath.patch
a86eb40e8aca531a1cfee5faff3c53d4 eventfd.patch
d91fcb785ae14632a4ea8fa03ba0236f uClibc-0.9.33-avahi.patch
08297e76052108d95303efe7d8745444 0001-libc-add-posix_fallocate.patch
ce8a33a31f5a53031fbad8b1d1b66d44 uclibcconfig.x86
e861a17baa541accf4d4d39a98d74c32 uclibcconfig.x86_64
ce8a33a31f5a53031fbad8b1d1b66d44 uclibcconfig.i486
......
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