From: Siddhesh Poyarekar <siddhesh@gotplt.org>
To: Adhemerval Zanella <adhemerval.zanella@linaro.org>,
libc-alpha@sourceware.org
Subject: Re: [PATCH v2 1/3] Consolidate fallocate{64} implementations
Date: Wed, 05 Oct 2016 06:54:00 -0000 [thread overview]
Message-ID: <04f1d8f2-7731-4f2a-a86e-0e9a67642641@gotplt.org> (raw)
In-Reply-To: <a8ea334f-e324-2f13-bc38-bd73811cbc52@linaro.org>
On Tuesday 04 October 2016 08:37 PM, Adhemerval Zanella wrote:
>>> +
>>> + off_t base_offset = UINT32_MAX + 2048LL;
>>
>> This will overflow on 32-bit.
>
> Not really since we explicit build the test with _FILE_OFFSET_BITS=64 so
> off_t will be 64-bit regardless.
I could see that in tst-fallocate, but not in tst-fallocate64.
> --
>
> diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
> index 9a0423e..f8f778b 100644
> --- a/sysdeps/unix/sysv/linux/Makefile
> +++ b/sysdeps/unix/sysv/linux/Makefile
> @@ -42,7 +42,8 @@ sysdep_headers += sys/mount.h sys/acct.h sys/sysctl.h \
> bits/socket_type.h bits/syscall.h bits/sysctl.h \
> bits/mman-linux.h
>
> -tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota
> +tests += tst-clone tst-clone2 tst-fanotify tst-personality tst-quota \
> + tst-fallocate tst-fallocate64
>
> # Generate the list of SYS_* macros for the system calls (__NR_* macros).
>
> diff --git a/sysdeps/unix/sysv/linux/fallocate.c b/sysdeps/unix/sysv/linux/fallocate.c
> index 6a58a5f..a38e9a6 100644
> --- a/sysdeps/unix/sysv/linux/fallocate.c
> +++ b/sysdeps/unix/sysv/linux/fallocate.c
> @@ -19,17 +19,12 @@
> #include <fcntl.h>
> #include <sysdep-cancel.h>
>
> -
> +#ifndef __OFF_T_MATCHES_OFF64_T
> /* Reserve storage for the data of the file associated with FD. */
> int
> fallocate (int fd, int mode, __off_t offset, __off_t len)
> {
> -#ifdef __NR_fallocate
> return SYSCALL_CANCEL (fallocate, fd, mode,
> - __LONG_LONG_PAIR (offset >> 31, offset),
> - __LONG_LONG_PAIR (len >> 31, len));
> -#else
> - __set_errno (ENOSYS);
> - return -1;
> -#endif
> + SYSCALL_LL (offset), SYSCALL_LL (len));
> }
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/fallocate64.c b/sysdeps/unix/sysv/linux/fallocate64.c
> index 8e76d6f..d466095 100644
> --- a/sysdeps/unix/sysv/linux/fallocate64.c
> +++ b/sysdeps/unix/sysv/linux/fallocate64.c
> @@ -24,14 +24,10 @@
> int
> fallocate64 (int fd, int mode, __off64_t offset, __off64_t len)
> {
> -#ifdef __NR_fallocate
> return SYSCALL_CANCEL (fallocate, fd, mode,
> - __LONG_LONG_PAIR ((long int) (offset >> 32),
> - (long int) offset),
> - __LONG_LONG_PAIR ((long int) (len >> 32),
> - (long int) len));
> -#else
> - __set_errno (ENOSYS);
> - return -1;
> -#endif
> + SYSCALL_LL64 (offset), SYSCALL_LL64 (len));
> }
> +
> +#ifdef __OFF_T_MATCHES_OFF64_T
> +weak_alias (fallocate64, fallocate)
> +#endif
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c b/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c
> deleted file mode 100644
> index 4e432f4..0000000
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate.c
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> - This file is part of the GNU C Library.
> -
> - The GNU C 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 2.1 of the License, or (at your option) any later version.
> -
> - The GNU C 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 the GNU C Library. If not, see
> - <http://www.gnu.org/licenses/>. */
> -
> -#include <errno.h>
> -#include <fcntl.h>
> -#include <sysdep-cancel.h>
> -
> -
> -/* Reserve storage for the data of the file associated with FD. */
> -int
> -fallocate (int fd, int mode, __off_t offset, __off_t len)
> -{
> -#ifdef __NR_fallocate
> - return SYSCALL_CANCEL (fallocate, fd, mode, offset, len);
> -#else
> - __set_errno (ENOSYS);
> - return -1;
> -#endif
> -}
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c b/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c
> deleted file mode 100644
> index 95c9eab..0000000
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n32/fallocate64.c
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> - This file is part of the GNU C Library.
> -
> - The GNU C 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 2.1 of the License, or (at your option) any later version.
> -
> - The GNU C 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 the GNU C Library. If not, see
> - <http://www.gnu.org/licenses/>. */
> -
> -#include <errno.h>
> -#include <fcntl.h>
> -#include <sysdep-cancel.h>
> -
> -
> -/* Reserve storage for the data of the file associated with FD. */
> -int
> -fallocate64 (int fd, int mode, __off64_t offset, __off64_t len)
> -{
> -#ifdef __NR_fallocate
> - return SYSCALL_CANCEL (fallocate, fd, mode, offset, len);
> -#else
> - __set_errno (ENOSYS);
> - return -1;
> -#endif
> -}
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate.c b/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate.c
> deleted file mode 100644
> index d3b7218..0000000
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -#include <sysdeps/unix/sysv/linux/wordsize-64/fallocate.c>
> diff --git a/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate64.c b/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate64.c
> deleted file mode 100644
> index fb2b681..0000000
> --- a/sysdeps/unix/sysv/linux/mips/mips64/n64/fallocate64.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -/* fallocate64 is in fallocate.c */
> diff --git a/sysdeps/unix/sysv/linux/tst-fallocate-common.c b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
> new file mode 100644
> index 0000000..76f31ff
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/tst-fallocate-common.c
> @@ -0,0 +1,98 @@
> +/* Basic fallocate test (no specific flags is checked).
> + Copyright (C) 2016 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C 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 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C 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 the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#include <fcntl.h>
> +#include <sys/types.h>
> +#include <sys/stat.h>
> +#include <unistd.h>
> +
> +static void do_prepare (void);
> +#define PREPARE(argc, argv) do_prepare ()
> +static int do_test (void);
> +#define TEST_FUNCTION do_test ()
> +
> +#define TIMEOUT 20 /* sec. */
> +
> +#define XSTR(s) STR(S)
> +#define STR(s) #s
> +
> +#include <test-skeleton.c>
> +
> +static char *temp_filename;
> +static int temp_fd;
> +
> +void
> +do_prepare (void)
> +{
> + temp_fd = create_temp_file ("tst-fallocate.", &temp_filename);
> + if (temp_fd == -1)
> + {
> + printf ("cannot create temporary file: %m\n");
> + exit (1);
> + }
> +}
> +
> +#define FAIL(...) \
> + ({ \
> + printf ("error: line %d: ", __LINE__); \
> + printf (__VA_ARGS__); \
> + printf ("\n"); \
> + return 1; \
> + })
> +
> +static int
> +do_test_with_offset (off_t offset)
> +{
> + int ret;
> + struct stat finfo;
> +#define BLK_SIZE 1024
> + char bwrite[BLK_SIZE] = { 0xf0 };
> + char bread[BLK_SIZE];
> +
> + /* It tries to fallocate 1024 bytes from 'offset' and then write 1024 bytes.
> + After both operation rewind the file descriptor and read 1024 bytes
> + and check if both buffer have the same contents. */
> + ret = fallocate (temp_fd, 0, offset, BLK_SIZE);
> + if (ret == -1)
> + FAIL ("fallocate failed");
> +
> + ret = fstat (temp_fd, &finfo);
> + if (ret == -1)
> + FAIL ("fstat failed");
> +
> + if (finfo.st_size < (offset + BLK_SIZE))
> + FAIL ("size of first fallocate less than expected (%llu)",
> + (long long unsigned int)offset + BLK_SIZE);
> +
> + if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
> + FAIL ("fseek (0, SEEK_SET) failed");
> +
> + if (write (temp_fd, bwrite, BLK_SIZE) != BLK_SIZE)
> + FAIL ("fail trying to write " XSTR (BLK_SIZE) " bytes");
> +
> + if (lseek (temp_fd, offset, SEEK_SET) == (off_t) -1)
> + FAIL ("fseek (0, SEEK_SET) failed");
> +
> + if (read (temp_fd, bread, BLK_SIZE) != BLK_SIZE)
> + FAIL ("fail trying to read " XSTR (BLK_SIZE) " bytes");
> +
> + if (memcmp (bwrite, bread, BLK_SIZE) != 0)
> + FAIL ("buffer writted different than buffer readed");
Typo, "written"?
> +
> + return 0;
> +}
> diff --git a/sysdeps/unix/sysv/linux/tst-fallocate.c b/sysdeps/unix/sysv/linux/tst-fallocate.c
> new file mode 100644
> index 0000000..ec3867c
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/tst-fallocate.c
> @@ -0,0 +1,25 @@
> +/* Basic fallocate test (no specific flags is checked).
> + Copyright (C) 2016 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C 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 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C 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 the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#include "tst-fallocate-common.c"
> +
> +static int
> +do_test (void)
> +{
> + return do_test_with_offset (0);
> +}
> diff --git a/sysdeps/unix/sysv/linux/tst-fallocate64.c b/sysdeps/unix/sysv/linux/tst-fallocate64.c
> new file mode 100644
> index 0000000..3c0d370
> --- /dev/null
> +++ b/sysdeps/unix/sysv/linux/tst-fallocate64.c
> @@ -0,0 +1,54 @@
> +/* Basic fallocate64 test (no specific flags is checked).
> + Copyright (C) 2016 Free Software Foundation, Inc.
> + This file is part of the GNU C Library.
> +
> + The GNU C 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 2.1 of the License, or (at your option) any later version.
> +
> + The GNU C 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 the GNU C Library; if not, see
> + <http://www.gnu.org/licenses/>. */
> +
> +#define _FILE_OFFSET_BITS 64
> +#include "tst-fallocate-common.c"
> +
> +static int
> +do_test (void)
> +{
> + ssize_t ret;
> +
> + ret = do_test_with_offset (0);
> + if (ret == 1)
> + return 1;
> +
> + off_t base_offset = UINT32_MAX + 2048LL;
> + ret = do_test_with_offset (base_offset);
> + if (ret == 1)
> + return 1;
> +
> + struct stat st;
> + if (fstat (temp_fd, &st) == -1)
> + {
> + printf ("error: fstat on temporary file failed: %m");
> + return 1;
> + }
> +
> + /* The file size should >= base_offset plus bytes written. */
> + off_t expected_value = base_offset + ret;
> + if (st.st_size < expected_value)
> + {
> + printf ("error: file size less than expected (%jd > %jd)\n",
> + (intmax_t) expected_value, (intmax_t) st.st_size);
> + return 1;
> + }
> +
> + return 0;
> +}
> +
> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fallocate.c b/sysdeps/unix/sysv/linux/wordsize-64/fallocate.c
> deleted file mode 100644
> index c1dd0b4..0000000
> --- a/sysdeps/unix/sysv/linux/wordsize-64/fallocate.c
> +++ /dev/null
> @@ -1,34 +0,0 @@
> -/* Copyright (C) 2007-2016 Free Software Foundation, Inc.
> - This file is part of the GNU C Library.
> -
> - The GNU C 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 2.1 of the License, or (at your option) any later version.
> -
> - The GNU C 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 the GNU C Library; if not, see
> - <http://www.gnu.org/licenses/>. */
> -
> -#include <errno.h>
> -#include <fcntl.h>
> -#include <sysdep-cancel.h>
> -
> -
> -/* Reserve storage for the data of the file associated with FD. */
> -int
> -fallocate (int fd, int mode, __off_t offset, __off_t len)
> -{
> -#ifdef __NR_fallocate
> - return SYSCALL_CANCEL (fallocate, fd, mode, offset, len);
> -#else
> - __set_errno (ENOSYS);
> - return -1;
> -#endif
> -}
> -strong_alias (fallocate, fallocate64)
> diff --git a/sysdeps/unix/sysv/linux/wordsize-64/fallocate64.c b/sysdeps/unix/sysv/linux/wordsize-64/fallocate64.c
> deleted file mode 100644
> index df33112..0000000
> --- a/sysdeps/unix/sysv/linux/wordsize-64/fallocate64.c
> +++ /dev/null
> @@ -1 +0,0 @@
> -/* fallocate64 is in posix_fallocate.c */
>
next prev parent reply other threads:[~2016-10-05 6:54 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-28 0:15 Adhemerval Zanella
2016-09-28 0:15 ` [PATCH v2 2/3] Consolidate posix_fallocate{64} implementations Adhemerval Zanella
2016-10-05 17:02 ` Siddhesh Poyarekar
2016-10-05 17:51 ` Adhemerval Zanella
2016-10-05 18:19 ` Siddhesh Poyarekar
2016-09-28 0:15 ` [PATCH v2 3/3] Consolidate posix_fadvise implementations Adhemerval Zanella
2016-10-05 17:15 ` Siddhesh Poyarekar
2016-10-06 20:50 ` Adhemerval Zanella
2016-10-11 23:47 ` Joseph Myers
2016-10-12 13:51 ` Adhemerval Zanella
2016-10-12 15:39 ` Joseph Myers
2016-10-12 16:05 ` Adhemerval Zanella
2016-10-12 16:11 ` Joseph Myers
2016-10-12 16:14 ` Adhemerval Zanella
2016-09-30 0:51 ` [PATCH v2 1/3] Consolidate fallocate{64} implementations Siddhesh Poyarekar
2016-10-04 15:07 ` Adhemerval Zanella
2016-10-05 6:54 ` Siddhesh Poyarekar [this message]
2016-10-05 14:49 ` Adhemerval Zanella
2016-10-05 16:50 ` Siddhesh Poyarekar
2016-10-17 14:15 ` Andreas Schwab
2016-10-17 14:20 ` Andreas Schwab
2016-10-17 15:52 ` Andreas Schwab
2016-10-17 15:57 ` Christoph Hellwig
2016-10-17 18:59 ` Adhemerval Zanella
2016-10-18 9:55 ` Florian Weimer
2016-10-18 7:45 ` Andreas Schwab
2016-10-17 14:44 ` Andreas Schwab
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