+++ /dev/null
-From: "Anthony G. Basile" <blueness@gentoo.org>
-Date: Sun, 7 Sep 2014 15:33:46 -0400
-Subject: [PATCH] libc: add fallocate() and fallocate64()
-
-We add the Linux-specific function fallocate() which allows the user to
-directly manipulate allocate space for a file. fallocate() can operate
-in different modes, but the default mode is equivalent to posix_fallocate()
-which is specified in POSIX.1.
-
-Recent releases of e2fsprogs 1.42.11 and above expect fallocate64() to be
-available.
-
-Signed-off-by: Anthony G. Basile <blueness@gentoo.org>
-Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
----
- create mode 100644 libc/sysdeps/linux/common/fallocate.c
- create mode 100644 libc/sysdeps/linux/common/fallocate64.c
- create mode 100644 test/unistd/tst-fallocate.c
- create mode 100644 test/unistd/tst-fallocate64.c
-
---- a/extra/Configs/Config.in
-+++ b/extra/Configs/Config.in
-@@ -952,8 +952,8 @@ config UCLIBC_LINUX_SPECIFIC
- default y
- help
- accept4(), bdflush(),
-- capget(), capset(), eventfd(), fstatfs(),
-- inotify_*(), ioperm(), iopl(),
-+ capget(), capset(), eventfd(), fallocate(),
-+ fstatfs(), inotify_*(), ioperm(), iopl(),
- madvise(), modify_ldt(), pipe2(), personality(),
- prctl()/arch_prctl(), pivot_root(), modify_ldt(),
- ppoll(), readahead(), reboot(), remap_file_pages(),
---- a/include/fcntl.h
-+++ b/include/fcntl.h
-@@ -237,6 +237,38 @@ extern int __fcntl_nocancel (int fd, int
- libc_hidden_proto(__fcntl_nocancel)
- #endif
-
-+#if (defined __UCLIBC_LINUX_SPECIFIC__ && defined __USE_GNU) || defined _LIBC
-+/* Reserve storage for the data of a file associated with FD. This function
-+ is Linux-specific. For the portable version, use posix_fallocate().
-+ Unlike the latter, fallocate can operate in different modes. The default
-+ mode = 0 is equivalent to posix_fallocate().
-+
-+ Note: These declarations are used in posix_fallocate.c and
-+ posix_fallocate64.c, so we expose them internally.
-+ */
-+
-+/* Flags for fallocate's mode. */
-+# define FALLOC_FL_KEEP_SIZE 1 /* Don't extend size of file
-+ even if offset + len is
-+ greater than file size. */
-+# define FALLOC_FL_PUNCH_HOLE 2 /* Create a hole in the file. */
-+
-+# ifndef __USE_FILE_OFFSET64
-+extern int fallocate (int __fd, int __mode, __off_t __offset, __off_t __len);
-+# else
-+# ifdef __REDIRECT
-+extern int __REDIRECT (fallocate, (int __fd, int __mode, __off64_t __offset,
-+ __off64_t __len),
-+ fallocate64);
-+# else
-+# define fallocate fallocate64
-+# endif
-+# endif
-+# ifdef __USE_LARGEFILE64
-+extern int fallocate64 (int __fd, int __mode, __off64_t __offset, __off64_t __len);
-+# endif
-+#endif
-+
- __END_DECLS
-
- #endif /* fcntl.h */
---- a/libc/sysdeps/linux/common/Makefile.in
-+++ b/libc/sysdeps/linux/common/Makefile.in
-@@ -61,6 +61,10 @@ CSRC-$(UCLIBC_LINUX_SPECIFIC) += \
- vmsplice.c
- CSRC-$(if $(findstring yy,$(UCLIBC_LINUX_SPECIFIC)$(UCLIBC_HAS_LFS)),y) += \
- sendfile64.c
-+# posix_fallocate() needs __libc_fallocate() from fallocate.c
-+# posix_fallocate64() needs __libc_fallocate64() from fallocate64.c
-+CSRC-$(if $(UCLIBC_LINUX_SPECIFIC)$(UCLIBC_HAS_ADVANCED_REALTIME),y,) += \
-+ fallocate.c $(filter fallocate64.c,$(CSRC-y))
- # NPTL needs these internally: madvise.c
- CSRC-$(findstring y,$(UCLIBC_LINUX_SPECIFIC)$(UCLIBC_HAS_THREADS_NATIVE)) += madvise.c
- ifeq ($(UCLIBC_HAS_THREADS_NATIVE),y)
---- /dev/null
-+++ b/libc/sysdeps/linux/common/fallocate.c
-@@ -0,0 +1,48 @@
-+/* vi: set sw=4 ts=4: */
-+/*
-+ * fallocate() for uClibc - Based off of posix_fallocate() by Erik Andersen
-+ * 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
-+extern __typeof(fallocate) __libc_fallocate attribute_hidden;
-+int attribute_hidden __libc_fallocate(int fd, int mode, __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, mode,
-+ __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, mode, 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_LINUX_SPECIFIC__ && defined __USE_GNU
-+strong_alias(__libc_fallocate,fallocate)
-+# if __WORDSIZE == 64
-+strong_alias(__libc_fallocate,fallocate64)
-+# endif
-+# endif
-+#endif
---- /dev/null
-+++ b/libc/sysdeps/linux/common/fallocate64.c
-@@ -0,0 +1,42 @@
-+/* vi: set sw=4 ts=4: */
-+/*
-+ * fallocate() for uClibc - based off posix_fallocate() by Erik Andersen
-+ * 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 fallocate() */
-+# elif __WORDSIZE == 32
-+extern __typeof(fallocate64) __libc_fallocate64 attribute_hidden;
-+int attribute_hidden __libc_fallocate64(int fd, int mode, __off64_t offset,
-+ __off64_t len)
-+{
-+ int ret;
-+ INTERNAL_SYSCALL_DECL(err);
-+ ret = (int) (INTERNAL_SYSCALL(fallocate, err, 6, fd, mode,
-+ OFF64_HI_LO (offset), OFF64_HI_LO (len)));
-+ if (unlikely(INTERNAL_SYSCALL_ERROR_P (ret, err)))
-+ return INTERNAL_SYSCALL_ERRNO (ret, err);
-+ return 0;
-+}
-+
-+# if defined __UCLIBC_LINUX_SPECIFIC__ && defined __USE_GNU
-+strong_alias(__libc_fallocate64,fallocate64)
-+# endif
-+
-+# else
-+# error your machine is neither 32 bit or 64 bit ... it must be magical
-+# endif
-+#endif
---- a/libc/sysdeps/linux/common/posix_fallocate.c
-+++ b/libc/sysdeps/linux/common/posix_fallocate.c
-@@ -14,28 +14,10 @@
- #include <stdint.h>
-
- #if defined __NR_fallocate
-+extern __typeof(fallocate) __libc_fallocate attribute_hidden;
- 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;
-+ return __libc_fallocate(fd, 0, offset, len);
- }
- # if defined __UCLIBC_HAS_LFS__ && __WORDSIZE == 64
- strong_alias(posix_fallocate,posix_fallocate64)
---- a/libc/sysdeps/linux/common/posix_fallocate64.c
-+++ b/libc/sysdeps/linux/common/posix_fallocate64.c
-@@ -18,22 +18,12 @@
- # if __WORDSIZE == 64
- /* Can use normal posix_fallocate() */
- # elif __WORDSIZE == 32
-+extern __typeof(fallocate64) __libc_fallocate64 attribute_hidden;
- 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;
-+ return __libc_fallocate64(fd, 0, offset, len);
- }
- # else
--# error your machine is neither 32 bit or 64 bit ... it must be magical
-+# 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-fallocate
-+unistd/tst-fallocate64
- unistd/tst-posix_fallocate
- unistd/tst-posix_fallocate64
- unistd/tst-preadwrite
---- /dev/null
-+++ b/test/unistd/tst-fallocate.c
-@@ -0,0 +1,166 @@
-+#include <fcntl.h>
-+#include <sys/stat.h>
-+
-+#ifndef TST_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);
-+static int do_test(void);
-+#define PREPARE(argc, argv) do_prepare ()
-+#define TEST_FUNCTION do_test ()
-+#include <test-skeleton.c>
-+
-+static int fd;
-+static void
-+do_prepare (void)
-+{
-+ fd = create_temp_file ("tst-fallocate.", NULL);
-+ if (fd == -1)
-+ {
-+ printf ("cannot create temporary file: %m\n");
-+ exit (1);
-+ }
-+}
-+
-+
-+static int
-+do_test (void)
-+{
-+ struct stat64 st;
-+ int c;
-+ char garbage[4096];
-+ blkcnt_t blksb4;
-+
-+ 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;
-+ }
-+
-+ /* This is the default mode which is identical to posix_fallocate().
-+ Note: we need a few extra blocks for FALLOC_FL_PUNCH_HOLE below.
-+ While block sizes vary, we'll assume eight 4K blocks for good measure. */
-+ if (fallocate (fd, 0, 8 * 4096, 128) != 0)
-+ {
-+ puts ("1st fallocate call failed");
-+ return 1;
-+ }
-+
-+ if (fstat64 (fd, &st) != 0)
-+ {
-+ puts ("2nd fstat failed");
-+ return 1;
-+ }
-+
-+ if (st.st_size != 8 * 4096 + 128)
-+ {
-+ printf ("file size after 1st fallocate call is %llu, expected %u\n",
-+ (unsigned long long int) st.st_size, 8u * 4096u + 128u);
-+ return 1;
-+ }
-+
-+ /* Without FALLOC_FL_KEEP_SIZE, this would increaste the size of the file. */
-+ if (fallocate (fd, FALLOC_FL_KEEP_SIZE, 0, 16 * 4096) != 0)
-+ {
-+ puts ("2nd fallocate call failed");
-+ return 1;
-+ }
-+
-+ if (fstat64 (fd, &st) != 0)
-+ {
-+ puts ("3rd fstat failed");
-+ return 1;
-+ }
-+
-+ if (st.st_size != 8 * 4096 + 128)
-+ {
-+ printf ("file size changed in 2nd fallocate call to %llu, expected %u\n",
-+ (unsigned long long int) st.st_size, 8u * 4096u + 128u);
-+ return 1;
-+ }
-+
-+ /* Let's fill up the first eight 4k blocks with 'x' to force some allocations. */
-+
-+ memset(garbage, 'x', 4096);
-+ for(c=0; c < 8; c++)
-+ if(write(fd, garbage, 4096) == -1)
-+ {
-+ puts ("write failed");
-+ return 1;
-+ }
-+
-+ if (fstat64 (fd, &st) != 0)
-+ {
-+ puts ("4th fstat failed");
-+ return 1;
-+ }
-+
-+ blksb4 = st.st_blocks;
-+
-+ /* Let's punch a hole in the entire file, turning it effectively into a sparse file. */
-+ if (fallocate (fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE, 0, 8 * 4096 + 128) != 0)
-+ {
-+ puts ("3rd fallocate call failed");
-+ return 1;
-+ }
-+
-+ if (fstat64 (fd, &st) != 0)
-+ {
-+ puts ("5th fstat failed");
-+ return 1;
-+ }
-+
-+ if (st.st_size != 8 * 4096 + 128)
-+ {
-+ printf ("file size after 3rd fallocate call is %llu, expected %u\n",
-+ (unsigned long long int) st.st_size, 8u * 4096u + 128u);
-+ return 1;
-+ }
-+
-+ /* The number of allocated blocks should decrease. I hope this works on
-+ all filesystems! */
-+ if (st.st_blocks >= blksb4)
-+ {
-+ printf ("number of blocks after 3rd fallocate call is %lu, expected less than %lu\n",
-+ (unsigned long int) st.st_blocks, blksb4);
-+ return 1;
-+ }
-+
-+#ifdef TST_FALLOCATE64
-+ /* We'll just do a mode = 0 test for fallocate64() */
-+ if (fallocate64 (fd, 0, 4097ULL, 4294967295ULL + 2ULL) != 0)
-+ {
-+ puts ("1st fallocate64 call failed");
-+ return 1;
-+ }
-+
-+ if (fstat64 (fd, &st) != 0)
-+ {
-+ puts ("6th fstat failed");
-+ return 1;
-+ }
-+
-+ if (st.st_size != 4097ULL + 4294967295ULL + 2ULL)
-+ {
-+ printf ("file size after 1st fallocate64 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-fallocate64.c
-@@ -0,0 +1,2 @@
-+#define TST_FALLOCATE64
-+#include "tst-fallocate.c"
---- a/test/unistd/Makefile.in
-+++ b/test/unistd/Makefile.in
-@@ -2,10 +2,13 @@
- # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
-
- ifeq ($(UCLIBC_HAS_LFS),)
--TESTS_DISABLED := tst-preadwrite64 tst-posix_fallocate64
-+TESTS_DISABLED := tst-preadwrite64 tst-posix_fallocate64 tst-fallocate64
- endif
- ifeq ($(UCLIBC_HAS_ADVANCED_REALTIME),)
--TESTS_DISABLED := tst-posix_fallocate
-+TESTS_DISABLED := tst-posix_fallocate tst-fallocate64
-+endif
-+ifeq ($(UCLIBC_LINUX_SPECIFIC),)
-+TESTS_DISABLED += tst-fallocate
- endif
- OPTS_getopt := -abcXXX -9
- OPTS_getopt_long := --add XXX --delete YYY --verbose
projects / openwrt / openwrt.git / blobdiff