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posix: Implement preadv2 and pwritev2

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This patch adds support of preadv2 and pwritev2 which are similar to
preadv/pwritev but with an extra flag argument.  As for preadv/pwritev
both interfaces are added a non-standard GNU API.

For default 'posix' implementation trying to emulate the Linux supported
flags is troublesome:

   * We can not temporary change the file state of the O_DSYNC and O_SYNC
     flags to emulate RWF_{D}SYNC (attempts to change the state of using
     fcntl are silently ignored).

   * IOCB_HIPRI requires the file opened in O_DIRECT and uses an internal
     semantic not provided by any other flag (O_NONBLOCK for instance).

So default sysdeps/posix implementations fails with EOPNOTSUPP for any non
supported flag (which are none currently) calls generic preadv/pwritev.
Basically this implementation supports only preadv2 called as preadv (with
flags sets to 0).

The Linux one uses the preadv2/pwritev2 syscall if defined, otherwise it
call preadv/writev.  Instead of using the previous __ASSUME_* to
unconditionally issue the syscall (and avoid building the fallback routine),
it call pread/write if the preadv2/pwritev2 syscalls fails.  The idea
is just avoid adding another __ASSUME_* and checking each architecture
on every kernel bump and simplify code conditionals.

Checked on x86_64-linux-gnu and on i686-linux-gnu and a check with
run-built-tests=no on aarch64-linux-gnu, alpha-linux-gnu, arm-linux-gnueabihf,
ia64-linux-gnu, m68k-linux-gnu, microblaze-linux-gnu, mips{64,64n32}-linux-gnu,
nios2-linux-gnu, powerpc{64,64le}-linux-gnu, s390{x}-linux-gnu,
sparc{64,v9}-linux-gnu, tile{gx,pro}-linux-gnu, and sh4-linux-gnu (all using
gcc 6.3).

	* NEWS: Add note about pwritev2 and preadv2 inclusion.
	* misc/Makefile (routines): Add preadv2, preadv64v2, pwritev2, and
	pwritev64v2.
	(tests): Add tst-preadvwritev2 and tst-preadvwritev64v2.
	* misc/Versions (GLIBC_2.26): Add preadv2, preadv64v2, pwritev2, and
	pwritev64v2.
	* misc/preadv2.c: New file.
	* misc/preadv64v2.c: Likewise.
	* misc/pwritev2.c: Likewise.
	* misc/pwritev64v2.c: Likewise.
	* misc/tst-preadvwritev2.c: Likewise.
	* misc/tst-preadvwritev64v2.c: Likewise.
	* manual/llio.texi: Add preadv2 and pwritev2 documentation.
	* misc/sys/uio.h [__USE_GNU && !__USE_FILE_OFFSET64] (preadv2): New
	prototype.
	[__USE_GNU && !__USE_FILE_OFFSET64] (pwritev2):	Likewise.
	[__USE_GNU && __USE_FILE_OFFSET64] (preadv64v2): Likewise.
	[__USE_GNU && __USE_FILE_OFFSET64] (pwritev64v2): Likewise.
	* misc/tst-preadvwritev-common.c (PREADV): Define if not defined.
	(PWRITEV): Likewise.
	(do_test_with_offset): Use PREADV and PWRITEV macros and check for
	ENOSYS.
	* nptl/tst-cancel4.c (tf_pwritev2): New test.
	(tf_preadv2): Likewise.
	(tf_fsync): Add tf_pwritev2 and tf_preadv2.
	* sysdeps/posix/preadv2.c: Likewise.
	* sysdeps/posix/preadv64v2.c: Likewise.
	* sysdeps/posix/pwritev2.c: Likewise.
	* sysdeps/posix/pwritev64v2.c: Likewise.
	* sysdeps/unix/sysv/linux/kernel-features.h: Add comment for syscall
	support in kernel.
	* sysdeps/unix/sysv/linux/preadv2.c: Likewise.
	* sysdeps/unix/sysv/linux/preadv64v2.c: Likewise.
	* sysdeps/unix/sysv/linux/pwritev2.c: Likewise.
	* sysdeps/unix/sysv/linux/pwritev64v2.c: Likewise.
	* sysdeps/unix/sysv/linux/preadv.c (preadv): Add libc_hidden_def.
	* sysdeps/unix/sysv/linux/preadv64.c (preadv64): Likewise.
	* sysdeps/unix/sysv/linux/pwritev.c (pwritev): Likewise.
	* sysdeps/unix/sysv/linux/pwritev64.c (pwritev64): Likewise.
	* sysdeps/unix/sysv/linux/bits/uio.h: Add supported preadv2/pwritev2
	support flags on Linux.
	* sysdeps/unix/sysv/linux/aarch64/libc.abilist (GLIBC_2.26): Add
	preadv2, preadv64v2, pwritev2, pwritev64v2.
	* sysdeps/unix/sysv/linux/alpha/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/arm/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/hppa/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/i386/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/ia64/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/microblaze/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/nios2/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
	(GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
	(GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
	(GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/sh/libc.abilist (GLIBC_2.26): Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/sysv/linux/tile/tilegx/tilegx32/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/sysv/linux/tile/tilegx/tilegx64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist (GLIBC_2.26):
	Likewise.
	* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist (GLIBC_2.26):
	Likewise.
This commit is contained in:
Adhemerval Zanella 2017-04-25 16:43:27 -03:00
parent cfa9bb61cd
commit 52bd938169
58 changed files with 1031 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

93
ChangeLog
View File

@ -1,3 +1,96 @@
2017-05-31 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* NEWS: Add note about pwritev2 and preadv2 inclusion.
* misc/Makefile (routines): Add preadv2, preadv64v2, pwritev2, and
pwritev64v2.
(tests): Add tst-preadvwritev2 and tst-preadvwritev64v2.
* misc/Versions (GLIBC_2.26): Add preadv2, preadv64v2, pwritev2, and
pwritev64v2.
* misc/preadv2.c: New file.
* misc/preadv64v2.c: Likewise.
* misc/pwritev2.c: Likewise.
* misc/pwritev64v2.c: Likewise.
* misc/tst-preadvwritev2.c: Likewise.
* misc/tst-preadvwritev64v2.c: Likewise.
* manual/llio.texi: Add preadv2 and pwritev2 documentation.
* misc/sys/uio.h [__USE_GNU && !__USE_FILE_OFFSET64] (preadv2): New
prototype.
[__USE_GNU && !__USE_FILE_OFFSET64] (pwritev2): Likewise.
[__USE_GNU && __USE_FILE_OFFSET64] (preadv64v2): Likewise.
[__USE_GNU && __USE_FILE_OFFSET64] (pwritev64v2): Likewise.
* misc/tst-preadvwritev-common.c (PREADV): Define if not defined.
(PWRITEV): Likewise.
(do_test_with_offset): Use PREADV and PWRITEV macros and check for
ENOSYS.
* nptl/tst-cancel4.c (tf_pwritev2): New test.
(tf_preadv2): Likewise.
(tf_fsync): Add tf_pwritev2 and tf_preadv2.
* sysdeps/posix/preadv2.c: Likewise.
* sysdeps/posix/preadv64v2.c: Likewise.
* sysdeps/posix/pwritev2.c: Likewise.
* sysdeps/posix/pwritev64v2.c: Likewise.
* sysdeps/unix/sysv/linux/kernel-features.h: Add comment for syscall
support in kernel.
* sysdeps/unix/sysv/linux/preadv2.c: Likewise.
* sysdeps/unix/sysv/linux/preadv64v2.c: Likewise.
* sysdeps/unix/sysv/linux/pwritev2.c: Likewise.
* sysdeps/unix/sysv/linux/pwritev64v2.c: Likewise.
* sysdeps/unix/sysv/linux/preadv.c (preadv): Add libc_hidden_def.
* sysdeps/unix/sysv/linux/preadv64.c (preadv64): Likewise.
* sysdeps/unix/sysv/linux/pwritev.c (pwritev): Likewise.
* sysdeps/unix/sysv/linux/pwritev64.c (pwritev64): Likewise.
* sysdeps/unix/sysv/linux/bits/uio.h: Add supported preadv2/pwritev2
support flags on Linux.
* sysdeps/unix/sysv/linux/aarch64/libc.abilist (GLIBC_2.26): Add
preadv2, preadv64v2, pwritev2, pwritev64v2.
* sysdeps/unix/sysv/linux/alpha/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/arm/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/hppa/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/i386/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/ia64/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/microblaze/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/nios2/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
(GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
(GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
(GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/sh/libc.abilist (GLIBC_2.26): Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/sysv/linux/tile/tilegx/tilegx32/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/sysv/linux/tile/tilegx/tilegx64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/64/libc.abilist (GLIBC_2.26):
Likewise.
* sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist (GLIBC_2.26):
Likewise.
2017-05-31 Andreas Schwab <schwab@suse.de>
* nptl/tst-fork3.c: Include <support/test-driver.c>.

7
NEWS
View File

@ -70,6 +70,13 @@ Version 2.26
replacement with a check for integer overflow when calculating total
allocation size.
* New preadv2 and pwritev2 has been added. They are Linux extensions to
preadv and pwritev with an additional flag argument where it is possible
to set high priority or use O_DSYNC or O_SYNC for a specific IO operation.
For complete support it requires Linux kernel version 4.6, otherwise a
compat implementation will be used (which refuses all flags and routes it
to preadv or pwritev).
Security related changes:
* The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,

6
include/sys/uio.h
View File

@ -7,5 +7,11 @@ extern ssize_t __readv (int __fd, const struct iovec *__iovec,
int __count);
extern ssize_t __writev (int __fd, const struct iovec *__iovec,
int __count);
/* Used for p{read,write}{v64}v2 implementation. */
libc_hidden_proto (preadv)
libc_hidden_proto (preadv64)
libc_hidden_proto (pwritev)
libc_hidden_proto (pwritev64)
#endif
#endif

109
manual/llio.texi
View File

@ -764,6 +764,115 @@ When the source file is compiled using @code{_FILE_OFFSET_BITS == 64} on a
@code{pwritev} and so transparently replaces the 32 bit interface.
@end deftypefun
@comment sys/uio.h
@comment GNU
@deftypefun ssize_t preadv2 (int @var{fd}, const struct iovec *@var{iov}, int @var{iovcnt}, off_t @var{offset}, int @var{flags})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
@c This is a syscall for Linux v4.6. The sysdeps/posix fallback emulation
@c is also MT-Safe since it calls preadv.
This function is similar to the @code{preadv} function, with the difference
it adds an extra @var{flags} parameter of type @code{int}. The supported
@var{flags} are dependent of the underlying system. For Linux it supports:
@vtable @code
@item RWF_HIPRI
High priority request. This adds a flag that tells the file system that
this is a high priority request for which it is worth to poll the hardware.
The flag is purely advisory and can be ignored if not supported. The
@var{fd} must be opened using @code{O_DIRECT}.
@item RWF_DSYNC
Per-IO synchronization as if the file was opened with @code{O_DSYNC} flag.
@item RWF_SYNC
Per-IO synchronization as if the file was opened with @code{O_SYNC} flag.
@end vtable
When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
@code{preadv2} function is in fact @code{preadv64v2} and the type
@code{off_t} has 64 bits, which makes it possible to handle files up to
@twoexp{63} bytes in length.
The return value is a count of bytes (@emph{not} buffers) read, @math{0}
indicating end-of-file, or @math{-1} indicating an error. The possible
errors are the same as in @code{preadv} with the addition of:
@table @code
@item EOPNOTSUPP
@c The default sysdeps/posix code will return it for any flags value
@c different than 0.
An unsupported @var{flags} was used.
@end table
@end deftypefun
@comment unistd.h
@comment GNU
@deftypefun ssize_t preadv64v2 (int @var{fd}, const struct iovec *@var{iov}, int @var{iovcnt}, off64_t @var{offset}, int @var{flags})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
@c This is a syscall for Linux v4.6. The sysdeps/posix fallback emulation
@c is also MT-Safe since it calls preadv.
This function is similar to the @code{preadv2} function with the difference
is that the @var{offset} parameter is of type @code{off64_t} instead of
@code{off_t}. It makes it possible on 32 bit machines to address
files larger than @twoexp{31} bytes and up to @twoexp{63} bytes. The
file descriptor @code{filedes} must be opened using @code{open64} since
otherwise the large offsets possible with @code{off64_t} will lead to
errors with a descriptor in small file mode.
When the source file is compiled using @code{_FILE_OFFSET_BITS == 64} on a
32 bit machine this function is actually available under the name
@code{preadv2} and so transparently replaces the 32 bit interface.
@end deftypefun
@comment sys/uio.h
@comment GNU
@deftypefun ssize_t pwritev2 (int @var{fd}, const struct iovec *@var{iov}, int @var{iovcnt}, off_t @var{offset}, int @var{flags})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
@c This is a syscall for Linux v4.6. The sysdeps/posix fallback emulation
@c is also MT-Safe since it calls pwritev.
This function is similar to the @code{pwritev} function, with the difference
it adds an extra @var{flags} parameter of type @code{int}. The supported
@var{flags} are dependent of the underlying system and for Linux it supports
the same ones as for @code{preadv2}.
When the source file is compiled with @code{_FILE_OFFSET_BITS == 64} the
@code{pwritev2} function is in fact @code{pwritev64v2} and the type
@code{off_t} has 64 bits, which makes it possible to handle files up to
@twoexp{63} bytes in length.
The return value is a count of bytes (@emph{not} buffers) write, @math{0}
indicating end-of-file, or @math{-1} indicating an error. The possible
errors are the same as in @code{preadv2}.
@end deftypefun
@comment unistd.h
@comment GNU
@deftypefun ssize_t pwritev64v2 (int @var{fd}, const struct iovec *@var{iov}, int @var{iovcnt}, off64_t @var{offset}, int @var{flags})
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
@c This is a syscall for Linux v4.6. The sysdeps/posix fallback emulation
@c is also MT-Safe since it calls pwritev.
This function is similar to the @code{pwritev2} function with the difference
is that the @var{offset} parameter is of type @code{off64_t} instead of
@code{off_t}. It makes it possible on 32 bit machines to address
files larger than @twoexp{31} bytes and up to @twoexp{63} bytes. The
file descriptor @code{filedes} must be opened using @code{open64} since
otherwise the large offsets possible with @code{off64_t} will lead to
errors with a descriptor in small file mode.
When the source file is compiled using @code{_FILE_OFFSET_BITS == 64} on a
32 bit machine this function is actually available under the name
@code{pwritev2} and so transparently replaces the 32 bit interface.
@end deftypefun
@node File Position Primitive
@section Setting the File Position of a Descriptor

4
misc/Makefile
View File

@ -39,6 +39,7 @@ headers := sys/uio.h bits/uio.h sys/ioctl.h bits/ioctls.h bits/ioctl-types.h \
routines := brk sbrk sstk ioctl \
readv writev preadv preadv64 pwritev pwritev64 \
preadv2 preadv64v2 pwritev2 pwritev64v2 \
setreuid setregid \
seteuid setegid \
getpagesize \
@ -79,7 +80,8 @@ gpl2lgpl := error.c error.h
tests := tst-dirname tst-tsearch tst-fdset tst-efgcvt tst-mntent tst-hsearch \
tst-error1 tst-pselect tst-insremque tst-mntent2 bug-hsearch1 \
tst-mntent-blank-corrupt tst-mntent-blank-passno bug18240 \
tst-preadvwritev tst-preadvwritev64 tst-makedev tst-empty
tst-preadvwritev tst-preadvwritev64 tst-makedev tst-empty \
tst-preadvwritev2 tst-preadvwritev64v2
tests-internal := tst-atomic tst-atomic-long
tests-static := tst-empty

3
misc/Versions
View File

@ -155,6 +155,9 @@ libc {
GLIBC_2.25 {
gnu_dev_major; gnu_dev_minor; gnu_dev_makedev;
}
GLIBC_2.26 {
preadv2; preadv64v2; pwritev2; pwritev64v2;
}
GLIBC_PRIVATE {
__madvise;
__mktemp;

30
misc/preadv2.c Normal file
View File

@ -0,0 +1,30 @@
/* Default implementation of preadv2.
Copyright (C) 2017 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 <sys/uio.h>
/* Same as preadv but with an additional flags argument. */
ssize_t
preadv2 (int fd, const struct iovec *vector, int count, off_t offset,
int flags)
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (preadv2)

30
misc/preadv64v2.c Normal file
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@ -0,0 +1,30 @@
/* Default implementation of preadv2 (LFS version).
Copyright (C) 2017 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 <sys/uio.h>
/* Same as preadv64 but with an addional flag argument. */
ssize_t
preadv64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
int flags)
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (preadv64v2)

30
misc/pwritev2.c Normal file
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@ -0,0 +1,30 @@
/* Default implementation of pwritev2.
Copyright (C) 2017 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 <sys/uio.h>
/* Same as pwritev but with an additional flags argument. */
ssize_t
pwritev2 (int fd, const struct iovec *vector, int count, off_t offset,
int flags)
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (pwritev2)

30
misc/pwritev64v2.c Normal file
View File

@ -0,0 +1,30 @@
/* Default implementation of pwritev2 (LFS version).
Copyright (C) 2017 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 <sys/uio.h>
/* Same as preadv64 but with an addional flag argument. */
ssize_t
pwritev64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
int flags)
{
__set_errno (ENOSYS);
return -1;
}
stub_warning (pwritev64v2)

41
misc/sys/uio.h
View File

@ -76,6 +76,7 @@ extern ssize_t preadv (int __fd, const struct iovec *__iovec, int __count,
__THROW. */
extern ssize_t pwritev (int __fd, const struct iovec *__iovec, int __count,
__off_t __offset) __wur;
# else
# ifdef __REDIRECT
extern ssize_t __REDIRECT (preadv, (int __fd, const struct iovec *__iovec,
@ -117,6 +118,46 @@ extern ssize_t pwritev64 (int __fd, const struct iovec *__iovec, int __count,
# endif
#endif /* Use misc. */
#ifdef __USE_GNU
# ifndef __USE_FILE_OFFSET64
/* Same as preadv but with an additional flag argumenti defined at uio.h. */
extern ssize_t preadv2 (int __fp, const struct iovec *__iovec, int __count,
__off_t __offset, int ___flags) __wur;
/* Same as preadv but with an additional flag argument defined at uio.h. */
extern ssize_t pwritev2 (int __fd, const struct iovec *__iodev, int __count,
__off_t __offset, int __flags) __wur;
# else
# ifdef __REDIRECT
extern ssize_t __REDIRECT (pwritev2, (int __fd, const struct iovec *__iovec,
int __count, __off64_t __offset,
int __flags),
pwritev64v2) __wur;
extern ssize_t __REDIRECT (preadv2, (int __fd, const struct iovec *__iovec,
int __count, __off64_t __offset,
int __flags),
preadv64v2) __wur;
# else
# define preadv2 preadv64v2
# define pwritev2 pwritev64v2
# endif
# endif
# ifdef __USE_LARGEFILE64
/* Same as preadv but with an additional flag argumenti defined at uio.h. */
extern ssize_t preadv64v2 (int __fp, const struct iovec *__iovec,
int __count, __off64_t __offset,
int ___flags) __wur;
/* Same as preadv but with an additional flag argument defined at uio.h. */
extern ssize_t pwritev64v2 (int __fd, const struct iovec *__iodev,
int __count, __off64_t __offset,
int __flags) __wur;
# endif
#endif /* Use GNU. */
__END_DECLS
#endif /* sys/uio.h */

19
misc/tst-preadvwritev-common.c
View File

@ -18,6 +18,7 @@
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <sys/uio.h>
#include <sys/stat.h>
@ -39,6 +40,16 @@ do_prepare (int argc, char **argv)
}
#define PREPARE do_prepare
#ifndef PREADV
# define PREADV(__fd, __iov, __iovcnt, __offset) \
preadv (__fd, __iov, __iovcnt, __offset)
#endif
#ifndef PWRITEV
# define PWRITEV(__fd, __iov, __iovcnt, __offset) \
pwritev (__fd, __iov, __iovcnt, __offset)
#endif
static int
do_test_with_offset (off_t offset)
{
@ -58,13 +69,13 @@ do_test_with_offset (off_t offset)
iov[1].iov_base = buf2;
iov[1].iov_len = sizeof buf2;
ret = pwritev (temp_fd, iov, 2, offset);
ret = PWRITEV (temp_fd, iov, 2, offset);
if (ret == -1)
FAIL_RET ("first pwritev returned -1");
if (ret != (sizeof buf1 + sizeof buf2))
FAIL_RET ("first pwritev returned an unexpected value");
ret = pwritev (temp_fd, iov, 2, sizeof buf1 + sizeof buf2 + offset);
ret = PWRITEV (temp_fd, iov, 2, sizeof buf1 + sizeof buf2 + offset);
if (ret == -1)
FAIL_RET ("second pwritev returned -1");
if (ret != (sizeof buf1 + sizeof buf2))
@ -82,7 +93,7 @@ do_test_with_offset (off_t offset)
iov[1].iov_len = sizeof buf4;
/* Now read two buffer with 32 and 64 bytes respectively. */
ret = preadv (temp_fd, iov, 2, offset);
ret = PREADV (temp_fd, iov, 2, offset);
if (ret == -1)
FAIL_RET ("first preadv returned -1");
if (ret != (sizeof buf3 + sizeof buf4))
@ -93,7 +104,7 @@ do_test_with_offset (off_t offset)
if (memcmp (buf2, buf4, sizeof buf2) != 0)
FAIL_RET ("second buffer from first preadv different than expected");
ret = preadv (temp_fd, iov, 2, sizeof buf3 + sizeof buf4 + offset);
ret = PREADV (temp_fd, iov, 2, sizeof buf3 + sizeof buf4 + offset);
if (ret == -1)
FAIL_RET ("second preadv returned -1");
if (ret != (sizeof buf3 + sizeof buf4))

31
misc/tst-preadvwritev2.c Normal file
View File

@ -0,0 +1,31 @@
/* Tests for preadv2 and pwritev2.
Copyright (C) 2016-2017 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 PREADV(__fd, __iov, __iovcnt, __offset) \
preadv2 (__fd, __iov, __iovcnt, __offset, 0)
#define PWRITEV(__fd, __iov, __iovcnt, __offset) \
pwritev2 (__fd, __iov, __iovcnt, __offset, 0)
#include "tst-preadvwritev-common.c"
static int
do_test (void)
{
return do_test_with_offset (0);
}

33
misc/tst-preadvwritev64v2.c Normal file
View File

@ -0,0 +1,33 @@
/* Tests for preadv2 and pwritev2 (LFS version).
Copyright (C) 2017 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
#define PREADV(__fd, __iov, __iovcnt, __offset) \
preadv2 (__fd, __iov, __iovcnt, __offset, 0)
#define PWRITEV(__fd, __iov, __iovcnt, __offset) \
pwritev2 (__fd, __iov, __iovcnt, __offset, 0)
#include "tst-preadvwritev-common.c"
static int
do_test (void)
{
return do_test_with_offset (0);
}

71
nptl/tst-cancel4.c
View File

@ -1078,6 +1078,75 @@ tf_pwritev (void *arg)
FAIL_EXIT1 ("pwritev returns with %zd", s);
}
static void *
tf_pwritev2 (void *arg)
{
int fd;
if (arg == NULL)
/* XXX If somebody can provide a portable test case in which pwritev2
blocks we can enable this test to run in both rounds. */
abort ();
errno = 0;
char fname[] = "/tmp/tst-cancel4-fd-XXXXXX";
tempfd = fd = mkstemp (fname);
if (fd == -1)
FAIL_EXIT1 ("mkstemp: %m");
unlink (fname);
xpthread_barrier_wait (&b2);
xpthread_barrier_wait (&b2);
ssize_t s;
pthread_cleanup_push (cl, NULL);
char buf[WRITE_BUFFER_SIZE];
memset (buf, '\0', sizeof (buf));
struct iovec iov[1] = { [0] = { .iov_base = buf, .iov_len = sizeof (buf) } };
s = pwritev2 (fd, iov, 1, 0, 0);
pthread_cleanup_pop (0);
FAIL_EXIT1 ("pwritev2 returns with %zd", s);
}
static void *
tf_preadv2 (void *arg)
{
int fd;
if (arg == NULL)
/* XXX If somebody can provide a portable test case in which preadv2
blocks we can enable this test to run in both rounds. */
abort ();
errno = 0;
char fname[] = "/tmp/tst-cancel4-fd-XXXXXX";
tempfd = fd = mkstemp (fname);
if (fd == -1)
FAIL_EXIT1 ("mkstemp failed: %m");
unlink (fname);
xpthread_barrier_wait (&b2);
xpthread_barrier_wait (&b2);
ssize_t s;
pthread_cleanup_push (cl, NULL);
char buf[100];
struct iovec iov[1] = { [0] = { .iov_base = buf, .iov_len = sizeof (buf) } };
s = preadv2 (fd, iov, 1, 0, 0);
pthread_cleanup_pop (0);
FAIL_EXIT1 ("preadv2 returns with %zd", s);
}
static void *
tf_fsync (void *arg)
{
@ -1473,7 +1542,9 @@ struct cancel_tests tests[] =
ADD_TEST (recvfrom, 2, 0),
ADD_TEST (recvmsg, 2, 0),
ADD_TEST (preadv, 2, 1),
ADD_TEST (preadv2, 2, 1),
ADD_TEST (pwritev, 2, 1),
ADD_TEST (pwritev2, 2, 1),
ADD_TEST (open, 2, 1),
ADD_TEST (close, 2, 1),
ADD_TEST (pread, 2, 1),

38
sysdeps/posix/preadv2.c Normal file
View File

@ -0,0 +1,38 @@
/* Generic version of preadv2.
Copyright (C) 2017 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 <unistd.h>
#include <sys/uio.h>
#ifndef __OFF_T_MATCHES_OFF64_T
/* Since we define no flags for preadv2 just route to preadv. */
ssize_t
preadv2 (int fd, const struct iovec *vector, int count, OFF_T offset,
int flags)
{
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return preadv (fd, vector, count, offset);
}
#endif

37
sysdeps/posix/preadv64v2.c Normal file
View File

@ -0,0 +1,37 @@
/* Generic version of preadv2.
Copyright (C) 2017 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 <unistd.>
#include <sys/uio.h>
ssize_t
preadv64v2 (int fd, const struct iovec *vector, int count, OFF_T offset,
int flags)
{
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return preadv64 (fd, vector, count, offset);
}
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (preadv64v2, preadv2)
#endif

38
sysdeps/posix/pwritev2.c Normal file
View File

@ -0,0 +1,38 @@
/* Generic version of pwritev2.
Copyright (C) 2017 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 <unistd.h>
#include <sys/uio.h>
#ifndef __OFF_T_MATCHES_OFF64_T
/* Since we define no flags for pwritev2 just route to pwritev. */
ssize_t
pwritev2 (int fd, const struct iovec *vector, int count, OFF_T offset,
int flags)
{
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return pwritev (fd, vector, count, offset);
}
#endif

38
sysdeps/posix/pwritev64v2.c Normal file
View File

@ -0,0 +1,38 @@
/* Generic version of pwritev2.
Copyright (C) 2017 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 <unistd.h>
#include <sys/uio.h>
/* Since we define no flags for pwritev2 just route to pwritev. */
ssize_t
pwritev64v2 (int fd, const struct iovec *vector, int count, OFF_T offset,
int flags)
{
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return pwritev64 (fd, vector, count, offset);
}
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (pwritev64v2, pwritev2)
#endif

4
sysdeps/unix/sysv/linux/aarch64/libc.abilist
View File

@ -2098,4 +2098,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/alpha/libc.abilist
View File

@ -2009,6 +2009,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/arm/libc.abilist
View File

@ -99,6 +99,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 _Exit F

6
sysdeps/unix/sysv/linux/bits/uio.h
View File

@ -69,4 +69,10 @@ extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec,
__END_DECLS
# endif
/* Flags for preadv2/pwritev2: */
#define RWF_HIPRI 0x00000001 /* High priority request. */
#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC. */
#define RWF_SYNC 0x00000004 /* per-IO O_SYNC. */
#endif

4
sysdeps/unix/sysv/linux/hppa/libc.abilist
View File

@ -1863,6 +1863,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/i386/libc.abilist
View File

@ -2021,6 +2021,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/ia64/libc.abilist
View File

@ -1885,6 +1885,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

5
sysdeps/unix/sysv/linux/kernel-features.h
View File

@ -97,3 +97,8 @@
/* Support for SysV IPC through wired syscalls. All supported architectures
either support ipc syscall and/or all the ipc correspondent syscalls. */
#define __ASSUME_DIRECT_SYSVIPC_SYSCALLS 1
/* Support for p{read,write}v2 was added in 4.6. However Linux default
implementation does not assume the __ASSUME_* and instead use a fallback
implementation based on p{read,write}v and returning an error for
non supported flags. */

4
sysdeps/unix/sysv/linux/m68k/coldfire/libc.abilist
View File

@ -100,6 +100,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.4 GLIBC_2.4 A
GLIBC_2.4 _Exit F

4
sysdeps/unix/sysv/linux/m68k/m680x0/libc.abilist
View File

@ -1977,6 +1977,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/microblaze/libc.abilist
View File

@ -2098,4 +2098,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/mips/mips32/fpu/libc.abilist
View File

@ -1952,6 +1952,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/mips/mips32/nofpu/libc.abilist
View File

@ -1950,6 +1950,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/mips/mips64/n32/libc.abilist
View File

@ -1948,6 +1948,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/mips/mips64/n64/libc.abilist
View File

@ -1943,6 +1943,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/nios2/libc.abilist
View File

@ -2139,4 +2139,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/libc.abilist
View File

@ -1981,6 +1981,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/powerpc/powerpc32/nofpu/libc.abilist
View File

@ -1986,6 +1986,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/powerpc/powerpc64/libc-le.abilist
View File

@ -2186,4 +2186,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/powerpc/powerpc64/libc.abilist
View File

@ -100,6 +100,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 _Exit F

2
sysdeps/unix/sysv/linux/preadv.c
View File

@ -50,4 +50,6 @@ preadv (int fd, const struct iovec *vector, int count, off_t offset)
# define OFF_T off_t
# include <sysdeps/posix/preadv_common.c>
# endif /* __ASSUME_PREADV */
libc_hidden_def (preadv)
#endif

55
sysdeps/unix/sysv/linux/preadv2.c Normal file
View File

@ -0,0 +1,55 @@
/* Linux implementation of preadv2.
Copyright (C) 2017 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 <sys/uio.h>
#include <sysdep-cancel.h>
#ifndef __OFF_T_MATCHES_OFF64_T
# if !defined (__NR_preadv2) && defined (__NR_pread64v2)
# define __NR_preadv2 __NR_pread64v2
# endif
ssize_t
preadv2 (int fd, const struct iovec *vector, int count, off_t offset,
int flags)
{
# ifdef __NR_preadv2
ssize_t result = SYSCALL_CANCEL (preadv2, fd, vector, count,
LO_HI_LONG (offset), flags);
if (result >= 0 || errno != ENOSYS)
return result;
# endif
/* Trying to emulate the preadv2 syscall flags is troublesome:
* We can not temporary change the file state of the O_DSYNC and O_SYNC
flags to emulate RWF_{D}SYNC (attempts to change the state of using
fcntl are silently ignored).
* IOCB_HIPRI requires the file opened in O_DIRECT and uses an internal
semantic not provided by any other flag (O_NONBLOCK for instance). */
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return preadv (fd, vector, count, offset);
}
#endif

2
sysdeps/unix/sysv/linux/preadv64.c
View File

@ -48,7 +48,9 @@ preadv64 (int fd, const struct iovec *vector, int count, off64_t offset)
# define OFF_T off64_t
# include <sysdeps/posix/preadv_common.c>
#endif
libc_hidden_def (preadv64)
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (preadv64, preadv)
libc_hidden_def (preadv)
#endif

55
sysdeps/unix/sysv/linux/preadv64v2.c Normal file
View File

@ -0,0 +1,55 @@
/* Linux implementation of preadv2 (LFS version).
Copyright (C) 2017 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 <sys/uio.h>
#include <sysdep-cancel.h>
#if !defined(__NR_preadv64v2) && defined(__NR_preadv2)
# define __NR_preadv64v2 __NR_preadv2
#endif
ssize_t
preadv64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
int flags)
{
#ifdef __NR_preadv64v2
ssize_t result = SYSCALL_CANCEL (preadv64v2, fd, vector, count,
LO_HI_LONG (offset), flags);
if (result >= 0 || errno != ENOSYS)
return result;
#endif
/* Trying to emulate the preadv2 syscall flags is troublesome:
* We can not temporary change the file state of the O_DSYNC and O_SYNC
flags to emulate RWF_{D}SYNC (attempts to change the state of using
fcntl are silently ignored).
* IOCB_HIPRI requires the file opened in O_DIRECT and uses an internal
semantic not provided by any other flag (O_NONBLOCK for instance). */
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return preadv64 (fd, vector, count, offset);
}
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (preadv64v2, preadv2)
#endif

1
sysdeps/unix/sysv/linux/pwrite64.c
View File

@ -28,6 +28,7 @@ __libc_pwrite64 (int fd, const void *buf, size_t count, off64_t offset)
{
return SYSCALL_CANCEL (pwrite64, fd, buf, count, SYSCALL_LL64_PRW (offset));
}
weak_alias (__libc_pwrite64, __pwrite64)
libc_hidden_weak (__pwrite64)
weak_alias (__libc_pwrite64, pwrite64)

2
sysdeps/unix/sysv/linux/pwritev.c
View File

@ -50,4 +50,6 @@ pwritev (int fd, const struct iovec *vector, int count, off_t offset)
# define OFF_T off_t
# include <sysdeps/posix/pwritev_common.c>
# endif /* __ASSUME_PREADV */
libc_hidden_def (pwritev)
#endif

51
sysdeps/unix/sysv/linux/pwritev2.c Normal file
View File

@ -0,0 +1,51 @@
/* Linux implementation of pwritev2.
Copyright (C) 2017 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 <sys/uio.h>
#include <sysdep-cancel.h>
#ifndef __OFF_T_MATCHES_OFF64_T
ssize_t
pwritev2 (int fd, const struct iovec *vector, int count, off_t offset,
int flags)
{
# ifdef __NR_pwritev2
ssize_t result = SYSCALL_CANCEL (pwritev2, fd, vector, count,
LO_HI_LONG (offset), flags);
if (result >= 0 || errno != ENOSYS)
return result;
# endif
/* Trying to emulate the pwritev2 syscall flags is troublesome:
* We can not temporary change the file state of the O_DSYNC and O_SYNC
flags to emulate RWF_{D}SYNC (attempts to change the state of using
fcntl are silently ignored).
* IOCB_HIPRI requires the file opened in O_DIRECT and uses an internal
semantic not provided by any other flag (O_NONBLOCK for instance). */
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return pwritev (fd, vector, count, offset);
}
#endif

2
sysdeps/unix/sysv/linux/pwritev64.c
View File

@ -48,7 +48,9 @@ pwritev64 (int fd, const struct iovec *vector, int count, off64_t offset)
# define OFF_T off64_t
# include <sysdeps/posix/pwritev_common.c>
#endif
libc_hidden_def (pwritev64)
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (pwritev64, pwritev)
libc_hidden_def (pwritev)
#endif

55
sysdeps/unix/sysv/linux/pwritev64v2.c Normal file
View File

@ -0,0 +1,55 @@
/* Linux implementation of pwritev2 (LFS version).
Copyright (C) 2017 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 <sys/uio.h>
#include <sysdep-cancel.h>
#if !defined(__NR_pwritev64v2) && defined(__NR_pwritev2)
# define __NR_pwritev64v2 __NR_pwritev2
#endif
ssize_t
pwritev64v2 (int fd, const struct iovec *vector, int count, off64_t offset,
int flags)
{
#ifdef __NR_pwritev64v2
ssize_t result = SYSCALL_CANCEL (pwritev64v2, fd, vector, count,
LO_HI_LONG (offset), flags);
if (result >= 0 || errno != ENOSYS)
return result;
#endif
/* Trying to emulate the pwritev2 syscall flags is troublesome:
* We can not temporary change the file state of the O_DSYNC and O_SYNC
flags to emulate RWF_{D}SYNC (attempts to change the state of using
fcntl are silently ignored).
* IOCB_HIPRI requires the file opened in O_DIRECT and uses an internal
semantic not provided by any other flag (O_NONBLOCK for instance). */
if (flags != 0)
{
__set_errno (EOPNOTSUPP);
return -1;
}
return pwritev64 (fd, vector, count, offset);
}
#ifdef __OFF_T_MATCHES_OFF64_T
strong_alias (pwritev64v2, pwritev2)
#endif

4
sysdeps/unix/sysv/linux/s390/s390-32/libc.abilist
View File

@ -1981,6 +1981,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/s390/s390-64/libc.abilist
View File

@ -1882,6 +1882,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/sh/libc.abilist
View File

@ -1867,6 +1867,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/sparc/sparc32/libc.abilist
View File

@ -1973,6 +1973,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/sparc/sparc64/libc.abilist
View File

@ -1911,6 +1911,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/tile/tilegx/tilegx32/libc.abilist
View File

@ -2105,4 +2105,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/tile/tilegx/tilegx64/libc.abilist
View File

@ -2105,4 +2105,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/tile/tilepro/libc.abilist
View File

@ -2105,4 +2105,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F

4
sysdeps/unix/sysv/linux/x86_64/64/libc.abilist
View File

@ -1862,6 +1862,10 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F
GLIBC_2.3 GLIBC_2.3 A
GLIBC_2.3 __ctype_b_loc F

4
sysdeps/unix/sysv/linux/x86_64/x32/libc.abilist
View File

@ -2105,4 +2105,8 @@ GLIBC_2.25 strfromd F
GLIBC_2.25 strfromf F
GLIBC_2.25 strfroml F
GLIBC_2.26 GLIBC_2.26 A
GLIBC_2.26 preadv2 F
GLIBC_2.26 preadv64v2 F
GLIBC_2.26 pwritev2 F
GLIBC_2.26 pwritev64v2 F
GLIBC_2.26 reallocarray F