tests: robustify statx test

Do not assume that <linux/stat.h> defines struct statx.

* configure.ac (AC_CHECK_TYPES): Check for struct statx in
<linux/stat.h>.
* tests/statx.c: Conditionalize on HAVE_STRUCT_STATX along with
__NR_statx.

tests: robustify old_mmap test

Do not assume that old mmap syscall is implemented in the kernel
when __NR_mmap is defined.

* tests/alarm.c (main): Print mmap return code using sprintrc,
do not invoke mprotect if mmap is not implemented.

tests: robustify alarm test

Do not assume that alarm syscall always succeeds.

* tests/alarm.c (main): Use sprintrc.

defs.h: add ability to pass style to printxval_index_ex macro

So it matches its name.

* defs.h (printxval_index_ex): Add style__ macro, pass it as the 5th
argument to the printxval_indexn_ex call.

tests: extend coverage of syslog tests

The current syslog test covers only those cases where the type parameter
is one of SYSLOG_ACTION_READ, SYSLOG_ACTION_READ_ALL,
SYSLOG_ACTION_READ_CLEAR as per codecov.

Add test case to cover the default case.

* tests/syslog.c (SYSLOG_ACTION_SIZE_BUFFER): New macro.
(main): Check SYSLOG_ACTION_SIZE_BUFFER decoding.

Co-Authored-by: Eugene Syromyatnikov <evgsyr@gmail.com>

aio: assorted iocb decoder updates

* xlat/aio_iocb_flags.in: New file.
* defs.h (pollflags, rwf_flags): New declarations.
* configure.ac (AC_CHECK_MEMBERS): Check for aio_flags and aio_rw_flags
fields of struct iocb.
* aio.c [HAVE_STRUCT_IOCB_AIO_FLAGS]: Include "xlat/aio_iocb_flags.h".
(AIO_RW_FLAGS_FIELD): New macro definition, defined based on the
presence of HAVE_STRUCT_IOCB_AIO_RW_FLAGS macro.
(iocb_sub): Add SUB_POLL.
(tprint_lio_opcode): Change IOCB_CMD_POLL subtype to SUB_POLL.
(print_common_flags): Conditionalize on HAVE_STRUCT_IOCB_AIO_FLAGS
instead of IOCB_FLAG_RESFD.  Print aio_flags using aio_iocb_flags xlat.
(print_iocb_header): Always print aio_data.  Print aio_rw_flags if it
is non-zero.  Print aio_reqprio based on the presence of
IOCB_FLAG_IOPRIO flag in aio_flags (use print_ioprio if it set and print
as a signed integer otherwise).
(print_iocb): Decode SUB_POLL subtype.
* tests/aio.c: Update expected output.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>

ioprio: add print_ioprio function

That respects xlat style settings.

* ioprio.c (print_ioprio): New function.
* defs.h (print_ioprio): New declaration.

tests: serialize bpf-obj_get_info_by_fd based executables

Concurrent execution of many bpf-obj_get_info_by_fd based tests may
lead to a temporary resource shortage that causes them to fail with
the following error diagnostics:

BPF_MAP_CREATE failed: Operation not permitted

Avoid this issue by serializing execution of all relevant tests.

* tests/lock_file.c: New file.
* tests/Makefile.am (libtests_a_SOURCES): Add lock_file.c
* tests/tests.h (lock_file_by_dirname): New prototype.
* tests/bpf-obj_get_info_by_fd.c (main): Call lock_file_by_dirname
to obtain an exclusive lock on bpf-obj_get_info_by_fd executable.

References: https://github.com/strace/strace/issues/74
References: https://github.com/strace/strace/issues/105

tests: fix build and run on alpha with fresh kernel headers

Fix tests on alpha with Linux kernel headers containing commits
v5.1-rc1~160^2~3^2~12 and v5.1-rc1~160^2~3^2~1.

* tests/getegid.c: Include "scno.h".
(main): Use sprintrc.
* tests/geteuid.c: Likewise.
* tests/getppid.c: Likewise.
* tests/getgid.c [__NR_getgid == __NR_getxgid]: Skip.
* tests/getuid.c [__NR_getuid == __NR_getxuid]: Skip.
* tests/getpid.c [__NR_getpid == __NR_getxpid]: Skip.
* tests/umount2.c (__NR_umount2): Remove.
(TEST_SYSCALL_NR): New macro.
(main): Use it instead of __NR_umount2.
* tests/ksysent.sed: Remove new __NR_get[gup]id aliases to traditional
__NR_getx[gup]id names (on alpha).
Prioritize __NR_umount over __NR_umount2, __NR_osf_shmat over __NR_shmat.
* NEWS: Mention these fixes.

copyright-year-gen, file-date-gen: enhance error diagnostics

* copyright-year-gen: Prefix error message with the script name.
* file-date-gen: Likewise.  Bail out in case of invalid date.

configure.ac: honor exit status of commands run by m4_esyscmd

If the command run by m4_esyscmd exits with non-zero exit status,
autom4te shall terminate.

* m4/st_esyscmd_s.m4: New file.
* configure.ac: Replace m4_esyscmd with st_esyscmd_s.

References: https://github.com/strace/strace/issues/105

tests: test evdev bitset decoding more thoroughly

* tests/ioctl_evdev-success-v.test: Inject various values.
* tests/ioctl_evdev-success.test: Likewise.
* tests/ioctl_evdev-success.c (NUM_WORDS): New macro.
(struct evdev_check): Constify arg_ptr and print_arg args.
(invoke_test_syscall, test_evdev, print_input_absinfo, print_input_id,
print_mtslots): Add const qualifiers.
(print_getbit): Add const qualifiers, rewrite to expect trailing NULL
in the string array instead of leading string count.
(main): Set size for ev_more, ev_less, ev_zero arrays; replace leading
count element in ev_more_str, ev_less_str, ev_zero_str with trailing
NULL; replace ev_more_str and ev_less_str with ev_more_str_2/ev_less_str_2
and ev_more_str_3/ev_less_str_3 that differ by presence of flags that reside
beyond first two bytes; add static and const qualifiers where possible;
add key/key_sts_8/key_str_16 values; update a to provide either ev_more_str_2
or ev_more_str_3 and either key_str_8 or key_str_16 depending on inject_retval
value.

evdev: fix array size calculation in decode_bitset_

max_nr is in bits (as it is a number of flags), result is in bytes, and
the array allocation has to be in personality words.

There's still an open question, however, what to do on big-endian
architectures when a non-divisible-by-4 value is returned.

* evdev.c (decode_bitset_): Declare size_bits, initialise it and use it
later instead of size; round up size by personality's word boundary.

evdev: avoid bit vector decoding on non-successful and 0 return codes

Reported by Clang.

    strace/evdev.c:157:3: note: The value 0 is assigned to 'size'
    #                size = tcp->u_rval * 8;
    #                ^~~~~~~~~~~~~~~~~~~~~~
    strace/evdev.c:158:2: warning: Declared variable-length array (VLA)
    has zero size
    #        char decoded_arg[size];
    #        ^

* evdev.c (decode_bitset_): Bail out before decoded_arg VLA definition.

filter_qualify: export trace_set set

In preparation for seccomp-assisted syscall filtering, export
trace_set set, which will be used to derive the BPF program.

* filter_qualify.c (trace_set): Remove static qualifier.
* number_set.h (trace_set): New declaration.

Post-release administrivia

* NEWS: Add a header line for the next release.
* debian/changelog.in: Add a changelog entry for 5.2-1.
* strace.spec.in: Likewise.

Prepare for 5.2 release

* NEWS: Update for 5.2 release.

Update .mailmap

* .mailmap: Add both email addresses of Zhibin Li to avoid duplication
in CREDITS file.

Update copyright headers

Headers updated automatically using maint/update_copyright_years.sh
script.

maint/update_copyright_years.sh: take all commits into account

This helps to avoid accidental shrinking of copyright years range.

* maint/update_copyright_years.sh: Take all commits into account
to find copyright years of the earliest and the latest commit.

Fix preprocessor indentation

Indent the C preprocessor directives to reflect their nesting
using the following script:

$ cppi -l $(git grep -El '^[[:space:]]*#[[:space:]]*(if|ifdef|ifndef|elif|else|endif|define|pragma)[[:space:]]' |grep -v '\.sh$') |while read f; do
cppi < "$f" > "$f".cppi; mv "$f".cppi "$f"
done

tests: check status qualifier

This change adds 8 test cases for -e status with unfinished, failed,
none, successful, detached, and the whole set.  The test cases for
failed, successful, and the whole set use chdir(2).  Threaded test cases
for unfinished and none rely on a child thread execve'ing the lead
thread.  There are additional single-threaded tests for status=none and
status=unfinished.  The test case for detached interrupts strace while
attached to a sleeping process.

* tests/status.c: New file.
* tests/status-all.c: Likewise.
* tests/status-failed.c: Likewise.
* tests/status-detached.expected: Likewise.
* tests/status-none.c: Likewise.
* tests/status-none-threads.c: Likewise.
* tests/status-successful.c: Likewise.
* tests/status-unfinished-threads.c: Likewise.
* tests/status-unfinished.c: Likewise.
* tests/status-detached.test: New test.
* tests/status-none-threads.test: Likewise.
* tests/status-unfinished-threads.test: Likewise.
* tests/tests.h (test_status_chdir): New prototype.
* tests/.gitignore: Add status-all, status-failed, status-none,
status-none-threads, status-successful, status-unfinished,
and status-unfinished-threads.
* tests/gen_tests.in: Add status-all, status-failed, status-successful,
status-none, and status-unfinished.
* tests/pure_executables.list: Likewise.
* tests/Makefile.am (libtests_a_SOURCES): Add status.c.
(check_PROGRAMS): Add status-none-threads and status-unfinished-threads.
(status_none_threads_LDADD, status_unfinished_threads_LDADD): New
variables.
(MISC_TESTS): Add status-detached.test, status-none-threads.test, and
status-unfinished-threads.test.
(EXTRA_DIST): Add status-detached.expected.

Co-Authored-by: Burkhard Kohl <burkhard.kohl@intel.com>
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>

Implement -e status=set option

The status qualifier enables filtering based on the return status of
syscalls.  -z and -Z become aliases for -e status=successful and -e
status=failed.  Staged output is only enabled when at least one status
is filtered, that is, when the set is incomplete.

* signal.c (popcount32): Move ...
* defs.h (popcount32): ... here.
(not_failing_only, failing_only): Remove.
* filter_qualify.c (status_set): New number_set variable.
(statuses): New variable for names of statuses.
(statusstr_to_uint, qualify_status): New functions.
(qual_options): Handle status qualifier.
* number_set.c (get_number_setbit, is_complete_set): New functions.
* number_set.h (is_complete_set): New prototype.
(status_t): New enumeration for statuses.
(status_set): New prototype.
* strace.1.in: Document new status qualifier.
* strace.c (not_failing_only, failing_only): Remove.
(droptcb): Handle status=detached option.
(init): Handle new status qualifier, set status_set variable on -z and -Z
options, warn on -zZ and -Zz, use is_complete_set.
(maybe_switch_tcbs): Reopen memstream after tcb switch.
(print_event_exit): Handle status=unfinished option.
* syscall.c (syscall_entering_trace): Use is_complete_set.
(syscall_exiting_trace): Use is_complete_set, handle status=unavailable
option.
* NEWS: Mention this change.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>

Stage output for -z and -Z options

-z and -Z options print only successful and failing syscalls respectively.
However, failure of syscall is only known after syscall return.  Thus, we
end up with something like this on, e.g., ENOENT:

  open("does_not_exist", O_RDONLY <unfinished ...>

whereas the intended result is that the open(...) line is not shown at all.

This change fixes this issue using open_memstream.  When either the -z or
the -Z option is used, the output is staged in memory (using
open_memstream) until we know the syscall return status.  If the
open_memstream function is not available, these new options error out.

Document -z and -Z options as new features since they have never worked
properly before and were undocumented since commit v4.4.95~21.

* stage_output.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* configure.ac (AC_CHECK_FUNCS): Add open_memstream.
* defs.h (struct tcb): Add real_outf, memfptr, and memfloc fields for
memstream.
(strace_open_memstream, strace_close_memstream): New prototypes.
* strace.1.in: Document -z and -Z options.
* strace.c (usage): Mention -z and -Z options.
(init): Error on -z and -Z options if open_memstream if unavailable.
(maybe_switch_tcbs): Handle switch of memstream between tcbs.
(printleader): Avoid marking staged syscalls as unfinished.
* syscall.c (syscall_entering_trace): Open memstream.
(syscall_exiting_trace): Filter failed syscalls if failing_only is set,
handle raw(tcp) case.
(print_syscall_resume): Avoid marking staged syscalls as resumed.
* NEWS: Mention this change.

Resolves: https://github.com/strace/strace/issues/49
Resolves: https://github.com/strace/strace/issues/50
Co-Authored-by: Burkhard Kohl <burkhard.kohl@intel.com>
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>

Add -Z option to print only failing syscalls

Existing -z option prints only successful syscalls.
This change adds a -Z option to print only failing syscalls.

Both options will start to behave properly with the subsequent commit.

* strace.c (init): Handle new -Z option.
* defs.h (failing_only): New prototype.
* syscall.c (failing_only): New variable.
(syscall_exiting_trace): Ignore failed syscalls if failing_only is set.

References: https://github.com/strace/strace/issues/50
Co-Authored-by: Burkhard Kohl <burkhard.kohl@intel.com>
Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>

syscall.c: rename ptrace_get_syscall_info to strace_get_syscall_info

... to avoid potential conflict with future glibc versions.

* syscall.c (ptrace_get_syscall_info): Rename to
strace_get_syscall_info.  All callers updated.

tests: fix build with cutting-edge glibc

Fix the following compilation error:

In file included from statx.c:44:
xstatx.c:47:16: error: ‘struct libc_statx’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]

* tests/xstatx.c (struct statx): New forward declaration.

Fix misleading stray PTRACE_EVENT_EXEC diagnostics

If current_tcp is to be switched, entering(current_tcp) is irrelevant.

* strace.c (maybe_switch_tcbs): Update comment.
(dispatch_event) <case TE_STOP_BEFORE_EXECVE>: Invoke
maybe_switch_current_tcp early, skip the check for a stray
PTRACE_EVENT_EXEC if current_tcp was switched.
* tests/maybe_switch_current_tcp.c: New file.
* tests/pure_executables.list: Add maybe_switch_current_tcp.
* tests/.gitignore: Likewise.
* tests/gen_tests.in (maybe_switch_current_tcp): New entry.
* tests/Makefile.am (maybe_switch_current_tcp_LDADD): New variable.

Refactor maybe_switch_tcbs

Change maybe_switch_tcbs to return NULL when no switching is necessary.
Introduce maybe_switch_current_tcp as a thing wrapper around
maybe_switch_tcbs.

* strace.c (maybe_switch_current_tcp): New function.
(dispatch_event): Use it instead of maybe_switch_tcbs, move comments
and the os_release check before maybe_switch_tcbs invocation ...
(maybe_switch_tcbs): ... here.  Change return value to NULL
if no switching was performed.

tests: robustify strace -k tests against link-time optimizer

Some distributions enable by default a link-time optimizer that
mangles stack_fcall sample executables in a way that renders them
unusable for test purposes.

Robustify tests to defeat link-time optimizer.

* tests/stack-fcall.h (f0, f1, f2, f3): Add second parameter.
* tests/stack-fcall.c (main): Pass main as the second parameter to f0.
* tests/stack-fcall-0.c (f0): Add second parameter f, pass the xor of it
and f0 to f1.
* tests/stack-fcall-1.c (f1): Add second parameter f, pass the xor of it
and f1 to f2.
* tests/stack-fcall-2.c (f2): Add second parameter f, pass the xor of it
and f2 to f3.
* tests/stack-fcall-3.c: Include <asm/unistd.h>.
(f3): Add second parameter f, invoke __NR_gettid syscall with the xor
of f and f3 as its argument.

ia64: optimize syscallent table

Use shuffle_scno since all valid syscall numbers start from 1024.

* linux/syscallent_base_nr.h: New file.
* linux/ia64/syscallent_base_nr.h: Likewise.
* linux/ia64/shuffle_scno.c: Likewise.
* Makefile.am (EXTRA_DIST): Add them.
* linux/ia64/syscallent.h [SYSCALLENT_BASE_NR] (BASE_NR): Define to 0.
* syscall.c: Include "syscallent_base_nr.h".
* clone.c [IA64] (ARG_STACKSIZE, ARG_PTID, ARG_CTID, ARG_TLS): Use
shuffle_scno.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>

inotify: decode file descriptor returned by inotify_init

* inotify.c (SYS_FUNC(inotify_init)): New function.
* linux/dummy.h (sys_inotify_init): Remove macro definition.
* tests/inotify_init.c: New file.
* tests/inotify_init-y.c: Likewise.
* tests/inotify_init1-y.c: Likewise.
* tests/inotify_init1.c [PRINT_PATHS]: Print inotify fd path.
* tests/inotify_init-y.test: New test.
* tests/.gitignore: Add inotify_init, inotify_init-y, inotify_init1-y.
* tests/pure_executables.list: Likewise.
* tests/gen_tests.in (inotify_init, inotify_init1-y): New tests.
* tests/Makefile.am (DECODER_TESTS): Add inotify_init-y.test.

rtnl_addr: decode IFA_RT_PRIORITY and IFA_TARGET_NETNSID

* rtnl_addr.c (ifaddrmsg_nla_decoders): Decode IFA_RT_PRIORITY as u32,
decode IFA_TARGET_NETNSID as s32.

mips o32: print an error message when fetching of syscall arguments fails

... instead of failing silently.

* linux/mips/get_syscall_args.c (get_syscall_args): Print an error message
when umoven fails.

linux/smc_diag.h: update struct smc_diag_req definition

In accordance with Linux commit v4.19-rc8~22^2~17^2.

* linux/smc_diag.h (struct smc_diag_req): Use an anonymous union
for diag_fallback/diag_mode fields.

kvm: avoid bogus vcpu_info assignment in vcpu_register

Also reformat code a bit to make nesting a bit clearer.

Reported by Clang.

* kvm.c (vcpu_register): Do not assign vcpu_alloc result to vcpu_info
as this value is not used afterwards in the function.

sync_file_range2: remove unneeded argn assignment

clang complains about it:

         argn = printllval(tcp, "%lld", argn);
         ^      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    sync_file_range2.c:43:2: note: Value stored to 'argn' is never read

* sync_file_range2.c (SYS_FUNC(sync_file_range2)): Do not assign
printllval result to argn for the second time.

syscall.c: avoid infinite loop in subcalls parsing

clang complains about it, so it might be a good reason to refactor it
into something more linear.

* syscall.c (syscall_entering_decode): Put syscall subcall decoding
before ipc/socket subcall decoding, remove the loop.

tests: check decoding of mode argument of mbind and set_mempolicy syscalls

* tests/mbind.c: Include "scno.h".
(errstr): New variable.
(k_mbind): New function.
(out_str): New macro.
(mpol_modes): New array.
(main): Use it and k_mbind.
* tests/set_mempolicy.c: Include "scno.h", do not include <errno.h>,
"xlat.h" and "xlat/mpol_modes.h".
(errstr): New variable.
(k_set_mempolicy): New function.
(out_str): New macro.
(mpol_modes): New array.
(print_nodes): Use it and k_set_mempolicy.
(main): Likewise.
* tests/mbind-Xabbrev.c: New file.
* tests/mbind-Xraw.c: Likewise.
* tests/mbind-Xverbose.c: Likewise.
* tests/set_mempolicy-Xabbrev.c: Likewise.
* tests/set_mempolicy-Xraw.c: Likewise.
* tests/set_mempolicy-Xverbose.c: Likewise.
* tests/gen_tests.in (mbind-Xabbrev, mbind-Xraw, mbind-Xverbose,
set_mempolicy-Xabbrev, set_mempolicy-Xraw, set_mempolicy-Xverbose):
New entries.
* tests/pure_executables.list: Add mbind-Xabbrev, mbind-Xraw,
mbind-Xverbose, set_mempolicy-Xabbrev, set_mempolicy-Xraw,
and set_mempolicy-Xverbose.
* tests/.gitignore: Likewise.

numa: enhance decoding of mode argument of mbind and set_mempolicy syscalls

Implement decoding of memory policy mode flags introduced by Linux
kernel commits v2.6.26-rc1~990 and v2.6.26-rc1~988.

* xlat/mpol_mode_flags.in: New file.
* numa.c: Include "xlat/mpol_mode_flags.h".
(print_mode): Print MPOL_MODE_FLAGS part of mode argument as flags.
* NEWS: Mention this.

numa: factor out printing of mode argument of mbind and set_mempolicy syscalls

This printing is going to be extended by subsequent changes.

* numa.c (print_mode): New function.
(SYS_FUNC(mbind), SYS_FUNC(set_mempolicy)): Use it.

Update ioctl entries from linux v5.2

* linux/32/ioctls_inc_align16.h: Update from linux v5.2-rc7
using ioctls_gen.sh.
* linux/32/ioctls_inc_align32.h: Likewise.
* linux/32/ioctls_inc_align64.h: Likewise.
* linux/64/ioctls_inc.h: Likewise.
* linux/x32/ioctls_inc0.h: Likewise.
* linux/aarch64/ioctls_arch0.h: Likewise.
* linux/arm/ioctls_arch0.h: Likewise.
* linux/mips/ioctls_arch0.h: Likewise.
* NEWS: Mention this.

sparc, sparc64: refactor arch_set_error and arch_set_success

* linux/sparc/set_error.c (sparc_set_o0_psr): New function.
(arch_set_error, arch_set_success): Use it.
* linux/sparc64/set_error.c (sparc64_set_o0_tstate): New function.
(arch_set_error, arch_set_success): Use it.

sparc, sparc64: fix syscall tampering when PTRACE_GET_SYSCALL_INFO is in use

When PTRACE_GET_SYSCALL_INFO is in use on sparc, psr is not loaded,
so it has to be loaded explicitly before tampering.
Likewise, when PTRACE_GET_SYSCALL_INFO is in use on sparc64, tstate
is not loaded, so it has to be loaded explicitly before tampering.

* linux/sparc/set_error.c (arch_set_error, arch_set_success): Explicitly
call get_regs before changing psr when PTRACE_GET_SYSCALL_INFO is in use.
* linux/sparc64/set_error.c (arch_set_error, arch_set_success):
Explicitly call get_regs before changing tstate when
PTRACE_GET_SYSCALL_INFO is in use.
* NEWS: Mention this fix.

powerpc: skip poking CCR if it is unchanged

* linux/powerpc/set_error.c (arch_set_r3_ccr): New function.
(arch_set_error, arch_set_success): Use it.

powerpc: fix syscall tampering when PTRACE_GET_SYSCALL_INFO is in use

When PTRACE_GET_SYSCALL_INFO is in use, CCR is not loaded, so it has
to be loaded explicitly before tampering.

* linux/powerpc/set_error.c (arch_set_error, arch_set_success):
Explicitly load CCR before changing it when PTRACE_GET_SYSCALL_INFO
is in use.
* NEWS: Mention this fix.

xlat: rename mbindflags to mbind_flags

The former name was not consistent with others.

* xlat/mbindflags.in: Rename to xlat/mbind_flags.in; all users updated.

xlat: update MPOL_F_* get_mempolicy flags

* xlat/get_mempolicy_flags.in (MPOL_F_MEMS_ALLOWED): New constant
introduced by Linux kernel v2.6.24-rc1~1212.
* NEWS: Mention this.
* tests/get_mempolicy.c (main): Update expected output.

xlat: rename mempolicyflags to get_mempolicy_flags

The former name was ambiguous.

* xlat/mempolicyflags.in: Rename to xlat/get_mempolicy_flags.in;
all users updated.

xlat: rename policies to mpol_modes

The former name was too vague.

* xlat/policies.in: Rename to xlat/mpol_modes.in; all users updated.

xlat: add MPOL_LOCAL constant

* xlat/policies.in (MPOL_LOCAL): New constant introduced by Linux kernel
commit v3.8-rc1~92^2~33.

Resolves: https://github.com/strace/strace/pull/102

ioctl: remove redundant _IOC_NR

* ioctl.c (evdev_decode_number): Replace _IOC_NR(nr) with nr
as the latter is defined to _IOC_NR(code).

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>

bpf: add support for new fields in BPF_PROG_TEST_RUN

* bpf_attr.h (struct BPF_PROG_TEST_RUN_struct): Add ctx_size_in,
ctx_size_out, ctx_in, and ctx_out fields.
* bpf.c (BEGIN_BPF_CMD_DECODER(BPF_PROG_TEST_RUN)): Decode these fields
introduced by Linux kernel commit v5.2-rc1~133^2~193^2~6.
* tests/bpf.c (BPF_PROG_TEST_RUN_checks): Check it.

bpf: implement decoding of BPF_MAP_FREEZE command

BPF_MAP_FREEZE command was introduced by Linux commit
v5.2-rc1~133^2~193^2~12^2~12.

* bpf_attr.h (struct BPF_MAP_FREEZE_struct): New type.
(BPF_MAP_FREEZE_struct_size, expected_BPF_MAP_FREEZE_struct_size): New
macros.
* bpf.c (BEGIN_BPF_CMD_DECODER(BPF_MAP_FREEZE)): New bpf command
decoder.
(SYS_FUNC(bpf)) <bpf_cmd_decoders[]>: Add BPF_CMD_ENTRY(BPF_MAP_FREEZE).
* NEWS: Mention this.
* tests/bpf.c (union bpf_attr_data): Add
BPF_ATTR_DATA_FIELD(BPF_MAP_FREEZE).
(BPF_MAP_FREEZE_checks): New checks array.
(main) <checks>: Add CHK(BPF_MAP_FREEZE).

xlat: update BPF_* constants

* xlat/bpf_attach_type.in (BPF_CGROUP_SYSCTL): New constant introduced
by Linux kernel commit v5.2-rc1~133^2~132^2~39^2~19.
(BPF_CGROUP_UDP4_RECVMSG, BPF_CGROUP_UDP6_RECVMSG): New constants
introduced by Linux kernel commit v5.2-rc6~33^2~44^2^2~5.
* xlat/bpf_commands.in (BPF_MAP_FREEZE): New constant introduced
by Linux kernel commit v5.2-rc1~133^2~193^2~12^2~12.
* xlat/bpf_map_flags.in (BPF_F_RDONLY_PROG, BPF_F_WRONLY_PROG): New
constants introduced by Linux kernel commit
v5.2-rc1~133^2~193^2~12^2~13.
* xlat/bpf_map_types.in (BPF_MAP_TYPE_SK_STORAGE): New constant
introduced by Linux kernel commit v5.2-rc1~133^2~80^2^2~6.
* xlat/bpf_prog_types.in (BPF_PROG_TYPE_CGROUP_SYSCTL): New constant
introduced by Linux kernel commit v5.2-rc1~133^2~132^2~39^2~19.
(BPF_PROG_TYPE_RAW_TRACEPOINT_WRITABLE): New constant introduced
by Linux kernel commit v5.2-rc1~133^2~80^2~1^2~4.
* NEWS: Mention this.
* tests/bpf.c (BPF_MAP_CREATE_checks, BPF_PROG_LOAD_checks,
BPF_PROG_QUERY_checks): Update.
* tests/kernel_version.c (print_bpf_attr): Update.

Implement decoding of fspick syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~1,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* fspick.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_fspick.
* xlat/fspick_flags.in: New file.
* linux/syscallent-common.h [BASE_NR + 433]: Wire up fspick.
* NEWS: Mention this change.
* tests/fspick.c: New file.
* tests/fspick-P.c: Likewise.
* tests/gen_tests.in (fspick, fspick-P): New entries.
* tests/pure_executables.list: Add fspick and fspick-P.
* tests/.gitignore: Likewise.

Implement decoding of fsmount syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~2,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* fsmount.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_fsmount.
* xlat/fsmount_cmds.in: New file.
* xlat/mount_attr_atime.in: Likewise.
* xlat/mount_attr_flags.in: Likewise.
* linux/syscallent-common.h [BASE_NR + 432]: Wire up fsmount.
* NEWS: Mention this change.
* tests/fsmount.c: New file.
* tests/gen_tests.in (fsmount): New entry.
* tests/pure_executables.list: Add fsmount.
* tests/.gitignore: Likewise.

Implement decoding of fsconfig syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~3,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* fsconfig.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_fsconfig.
* xlat/fsconfig_cmds.in: New file.
* linux/syscallent-common.h [BASE_NR + 431]: Wire up fsconfig.
* NEWS: Mention this change.
* tests/fsconfig.c: New file.
* tests/fsconfig-P.c: Likewise.
* tests/gen_tests.in (fsconfig, fsconfig-P): New entries.
* tests/pure_executables.list: Add fsconfig and fsconfig-P.
* tests/.gitignore: Likewise.

print_dirfd: do not print trailing comma

It was fine to print trailing comma in print_dirfd until introduction
of a syscall with the last argument being a dirfd.
Now it's time to change print_dirfd.

* open.c (print_dirfd): Do not print comma.
(SYS_FUNC(open)): Print comma after print_dirfd() invocation.
* access.c (SYS_FUNC(faccessat)): Likewise.
* chmod.c (SYS_FUNC(fchmodat)): Likewise.
* execve.c (SYS_FUNC(execveat)): Likewise.
* fanotify.c (SYS_FUNC(fanotify_mark)): Likewise.
* fchownat.c (SYS_FUNC(fchownat)): Likewise.
* file_handle.c (SYS_FUNC(name_to_handle_at)): Likewise.
* link.c (SYS_FUNC(linkat), SYS_FUNC(unlinkat), SYS_FUNC(symlinkat)):
Likewise.
* mknod.c (SYS_FUNC(mknodat)): Likewise.
* move_mount.c (SYS_FUNC(move_mount)): Likewise.
* open_tree.c (SYS_FUNC(open_tree)): Likewise.
* readlink.c (SYS_FUNC(readlinkat)): Likewise.
* renameat.c (decode_renameat): Likewise.
* stat.c (SYS_FUNC(newfstatat)): Likewise.
* stat64.c (SYS_FUNC(fstatat64)): Likewise.
* statx.c (SYS_FUNC(statx)): Likewise.
* utimes.c (SYS_FUNC(futimesat), do_utimensat): Likewise.

Implement decoding of fsopen syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~5,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* fsopen.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_fsopen.
* xlat/fsopen_flags.in: New file.
* linux/syscallent-common.h [BASE_NR + 430]: Wire up fsopen.
* NEWS: Mention this change.
* tests/fsopen.c: New file.
* tests/gen_tests.in (fsopen): New entry.
* tests/pure_executables.list: Add fsopen.
* tests/.gitignore: Likewise.

Implement decoding of move_mount syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~8,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* move_mount.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_move_mount.
* xlat/move_mount_flags.in: New file.
* linux/syscallent-common.h [BASE_NR + 429]: Wire up move_mount.
* NEWS: Mention this change.
* tests/move_mount.c: New file.
* tests/move_mount-P.c: Likewise.
* tests/gen_tests.in (move_mount, move_mount-P): New entries.
* tests/pure_executables.list: Add move_mount and move_mount-P.
* tests/.gitignore: Likewise.

Implement decoding of open_tree syscall

... introduced by Linux kernel commits v5.2-rc1~141^2~9,
v5.2-rc1~20^2~1, and v5.2-rc1~20^2.

* configure.ac (AC_CHECK_HEADERS): Add linux/mount.h.
* open_tree.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* pathtrace.c (pathtrace_match_set): Add SEN_open_tree.
* xlat/open_tree_flags.in: New file.
* linux/syscallent-common.h [BASE_NR + 428]: Wire up open_tree.
* NEWS: Mention this change.
* tests/open_tree.c: New file.
* tests/open_tree-P.c: Likewise.
* tests/gen_tests.in (open_tree, open_tree-P): New entries.
* tests/pure_executables.list: Add open_tree and open_tree-P.
* tests/.gitignore: Likewise.

Introduce linux/syscallent-common.h and linux/syscallent-common-32.h

These files are going to be used to define syscall entries for common
syscalls added in Linux kernel 5.1+.

* linux/syscallent-common.h: New file.
* linux/syscallent-common-32.h: Likewise.
* Makefile.am (EXTRA_DIST): Add them.
(syscallent_names): Add syscallent-common.h and syscallent-common-32.h.
* linux/mips/.gitignore: Add syscallent-common-32-stub.h
and syscallent-common-stub.h.
* linux/mips/genstub.sh: Parametrize source directory.  Change syscall
name prefix to SYSCALL_NAME_PREFIX.
* configure.ac [MIPS]: Generate stubs for linux/syscallent-common.h
and linux/syscallent-common-32.h files.
* linux/mips/syscallent-n32.h [LINUX_MIPSN32]
[BASE_NR + 403..BASE_NR + 427]: Remove, include "syscallent-common-32.h"
and "syscallent-common.h" instead.
[!LINUX_MIPSN32] (SYSCALL_NAME_PREFIX): Define.
[!LINUX_MIPSN32]: Include "syscallent-common-32-sub.h"
and "syscallent-common-stub.h".
* linux/mips/syscallent-o32.h [LINUX_MIPSO32]
[BASE_NR + 403..BASE_NR + 427]: Remove, include "syscallent-common-32.h"
and "syscallent-common.h" instead.
[!LINUX_MIPSO32] (SYSCALL_NAME_PREFIX): Define.
[!LINUX_MIPSO32]: Include "syscallent-common-32-sub.h"
* linux/32/syscallent.h [403..427]: Remove, include
"syscallent-common-32.h" and "syscallent-common.h" instead.
* linux/arm/syscallent.h: Likewise.
* linux/hppa/syscallent.h: Likewise.
* linux/i386/syscallent.h: Likewise.
* linux/m68k/syscallent.h: Likewise.
* linux/microblaze/syscallent.h: Likewise.
* linux/powerpc/syscallent.h: Likewise.
* linux/s390/syscallent.h: Likewise.
* linux/sh/syscallent.h: Likewise.
* linux/sparc/syscallent.h: Likewise.
* linux/xtensa/syscallent.h: Likewise.
* linux/alpha/syscallent.h (BASE_NR): Define.
[534..537]: Remove, include "syscallent-common.h" instead.
* linux/ia64/syscallent.h [BASE_NR + 424..BASE_NR + 427]: Remove,
include "syscallent-common.h" instead.
* linux/mips/syscallent-n64.h [LINUX_MIPSN64]: Likewise.
[!LINUX_MIPSN64] (SYSCALL_NAME_PREFIX): Define.
[!LINUX_MIPSN64]: Include "syscallent-common-stub.h".
* linux/64/syscallent.h [424..427]: Remove, include
"syscallent-common.h" instead.
* linux/powerpc64/syscallent.h: Likewise.
* linux/s390x/syscallent.h: Likewise.
* linux/sh64/syscallent.h: Likewise.
* linux/sparc64/syscallent.h: Likewise.
* linux/x32/syscallent.h: Likewise.
* linux/x86_64/syscallent.h: Likewise.

ia64: introduce BASE_NR to syscallent initializers

* linux/ia64/syscallent.h (BASE_NR): New macro.  Use it instead of 1024.

mips: refactor syscallent initializers

Change format of designated initializers to BASE_NR + offset.

* linux/mips/syscallent-n32.h (BASE_NR): New macro.  Use it in designated
initializers.
* linux/mips/syscallent-n64.h: Likewise.
* linux/mips/syscallent-o32.h: Likewise.

xlat: update AT_* constants

* xlat/at_flags.in (AT_RECURSIVE): New constant introduced
by Linux kernel commit v5.2-rc1~141^2~9.
* NEWS: Mention this.
* tests/linkat.c: Update expected output.
* tests/unlinkat.c: Update expected output.
* tests/utimensat.c: Update expected output.
* tests/xstatx.c: Update expected output.

travis: Move fastest test configuration first

I use Travis CI to check each patch before sending my patchsets.  Most
failures are simple and make all test configurations fail.  However, since
Travis CI runs test configurations in order and given that the first three
configurations are the slowest ones, it takes about twenty minutes to see
the failure.  Moving the fastest test configuration first would allow to
fail earlier.  It would become about 3x faster to fail in case of simple
mistakes.

* .travis.yml (CC=gcc, STACKTRACE=no): Move to first position.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>

get_os_release: tolerate malformed kernel release strings

* strace.c (get_os_release): Handle malformed kernel release strings
gracefully.

Resolves: https://github.com/strace/strace/issues/101

Implement decoding of CLONE_PIDFD flag of clone syscall

* clone.c (SYS_FUNC(clone)): Print pidfd returned by the kernel
when CLONE_PIDFD flag is set.
* tests/clone-flags.c (main): Check it.

Introduce printnum_fd

This is going to be used to implement decoding of CLONE_PIDFD flag
of clone syscall.

* defs.h (printnum_fd): New prototype.
* util.c (printnum_fd): New function.

Enhance decoding of CLONE_PARENT_SETTID flag of clone syscall

* clone.c (SYS_FUNC(clone)): Print the parent_tid returned by the kernel
instead of its address when CLONE_PARENT_SETTID flag is set.
* tests/clone-flags.c (main): Check it.

clone: fix printing of zero clone flags

* clone.c (SYS_FUNC(clone)): Fix printing of zero clone flags.
* tests/clone-flags.c (main): Check it.

clone: print read-only arguments on entering syscall

* clone.c (SYS_FUNC(clone)): Print child_stack, stack_size, and flags
arguments on entering syscall.
* NEWS: Mention this change.

tests: check decoding of clone flags

* tests/clone-flags.c: New file.
* tests/pure_executables.list: Add clone-flags.
* tests/.gitignore: Likewise.
* tests/clone-flags.test: New test.
* tests/Makefile.am (DECODER_TESTS): Add clone-flags.test.

clone: cleanup

* clone.c (print_tls_arg): Use addr argument.

xlat: update CLONE_* constants

* xlat/clone_flags.in (CLONE_IDLETASK): Remove unused flag conflicting
with CLONE_PIDFD.

Fixes: v5.1-8-gb43f44bca "xlat: update CLONE_* constants"

Use debug_msg macro where possible

* linux/alpha/get_scno.c (arch_get_scno): Use debug_msg instead of
open-coding it.
* linux/mips/get_scno.c: Likewise.
* linux/sh/get_scno.c: Likewise.

Signed-off-by: Paul Chaignon <paul.chaignon@gmail.com>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>

xlat: update ETH_* constants

* xlat/ethernet_protocols.in (ETH_P_DSA_8021Q): New constant introduced
by Linux kernel commit v5.2-rc1~133^2~58^2~7.
* NEWS: Mention this.

xlat: update KBD_* constants

* xlat/evdev_keycode.in (KEY_KBD_LAYOUT_NEXT): New constant
introduced by Linux kernel commit v5.2-rc1~79^2^2~7.
* NEWS: Mention this.

xlat: update TIPC_* constants

* xlat/sock_tipc_options.in (TIPC_SOCK_RECVQ_USED): New constant
introduced by Linux kernel commit v5.2-rc1~133^2~143.
* NEWS: Mention this.

xlat: update KVM_CAP_* constants

* xlat/clone_flags.in (KVM_CAP_MANUAL_DIRTY_LOG_PROTECT2): New
constant introduced by Linux kernel commit v5.2-rc1~17^2~11.
(KVM_CAP_PPC_IRQ_XIVE): New constant introduced by Linux kernel commits
v5.2-rc1~17^2~2^2~19 and v5.2-rc1~17^2~2.
(KVM_CAP_ARM_SVE): New constant introduced by Linux kernel commit
v5.2-rc1~17^2~1^2~31.
(KVM_CAP_ARM_PTRAUTH_ADDRESS, KVM_CAP_ARM_PTRAUTH_GENERIC): New
constants introduced by Linux kernel commits v5.2-rc1~17^2~1^2~10
and v5.2-rc1~17^2~1.
* NEWS: Mention this.

xlat: update CLONE_* constants

* xlat/clone_flags.in (CLONE_PIDFD): New constant introduced by Linux
kernel commit v5.2-rc1~158^2~2.
* NEWS: Mention this.

xlat: update V4L2_PIX_* constants

* xlat/v4l2_pix_fmts.in (V4L2_PIX_FMT_FWHT_STATELESS): New constant
introduced by Linux kernel commit v5.2-rc1~33^2~132.
(V4L2_PIX_FMT_BGRA32, V4L2_PIX_FMT_BGRX32, V4L2_PIX_FMT_RGBA32,
V4L2_PIX_FMT_RGBX32): New constants introduced by Linux kernel commit
v5.2-rc1~33^2~25.
(V4L2_PIX_FMT_RGBA444, V4L2_PIX_FMT_RGBX444, V4L2_PIX_FMT_ABGR444,
V4L2_PIX_FMT_XBGR444, V4L2_PIX_FMT_XBGR444, V4L2_PIX_FMT_BGRX444): New
constants introduced by Linux kernel commit v5.2-rc1~33^2~24.
(V4L2_PIX_FMT_RGBA555, V4L2_PIX_FMT_RGBX555, V4L2_PIX_FMT_ABGR555,
V4L2_PIX_FMT_XBGR555, V4L2_PIX_FMT_BGRA555, V4L2_PIX_FMT_BGRX555): New
constants introduced by Linux kernel commit v5.2-rc1~33^2~23.

xlat: fix v4l2_pix_fmts sorting order

* xlat/v4l2_pix_fmts.in: Fix sorting order.

xlat: update V4L2_CID_* constants

* xlat/v4l2_control_ids.in (V4L2_CID_FWHT_I_FRAME_QP,
V4L2_CID_FWHT_P_FRAME_QP): New constants introduced by Linux kernel
commit v5.2-rc1~33^2~132.
(V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MIN_QP,
V4L2_CID_MPEG_VIDEO_H264_I_FRAME_MAX_QP,
V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MIN_QP,
V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP): New constants introduced by
Linux kernel commit v5.2-rc1~33^2~95.
* NEWS: Mention this.

xlat: update AUDIT_* constants

* xlat/nl_audit_types.in (AUDIT_FANOTIFY): New constant introduced by
Linux kernel commit v4.15-rc1~130^2^2~11.
(AUDIT_TIME_INJOFFSET): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~2.
(AUDIT_TIME_ADJNTPVAL): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~1.

xlat: update AUDIT_ARCH_* constants

* xlat/audit_arch.in (AUDIT_ARCH_ARCOMPACT, AUDIT_ARCH_ARCOMPACTBE,
AUDIT_ARCH_ARCV2, AUDIT_ARCH_ARCV2BE): New constants introduced by Linux
kernel commit v5.2-rc1~144^2~16.
(AUDIT_ARCH_C6X, AUDIT_ARCH_C6XBE): New constants introduced by Linux
kernel commit v5.2-rc1~144^2~15.
(AUDIT_ARCH_CSKY): New constant introduced by Linux kernel commit
v5.0-rc1~37^2~15.
(AUDIT_ARCH_H8300): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~14.
(AUDIT_ARCH_HEXAGON): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~12.
(AUDIT_ARCH_NDS32, AUDIT_ARCH_NDS32BE): New constants introduced by
Linux kernel commit v5.2-rc1~144^2~9.
(AUDIT_ARCH_NIOS2): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~8.
(AUDIT_ARCH_RISCV32, AUDIT_ARCH_RISCV64): New constants introduced by
Linux kernel commit v5.0-rc2~23^2~1^2~5.
(AUDIT_ARCH_TILEGX, AUDIT_ARCH_TILEGX32, AUDIT_ARCH_TILEPRO): New
constants introduced by Linux kernel commit v4.3-rc1~83^2~3.
(AUDIT_ARCH_UNICORE): New constant introduced by Linux kernel commit
v5.2-rc1~144^2~6.
(AUDIT_ARCH_XTENSA): New constant introduced by Linux kernel commit
v5.0-rc1~92^2~8.
* NEWS: Mention this.

tests: print the reason of failure in ioctl_kvm_run tests

* tests/ioctl_kvm_run_common.c (run_kvm): Print
hardware_entry_failure_reason field of kvm_run
when KVM_RUN is failed with KVM_EXIT_FAIL_ENTRY.

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

Post-release administrivia

* NEWS: Add a header line for the next release.
* debian/changelog.in: Add a changelog entry for 5.1-1.
* strace.spec.in: Likewise.

Prepare for 5.1 release

* NEWS: Update for 5.1 release.

Update copyright headers

Headers updated automatically using maint/update_copyright_years.sh
script.

Use xzalloc(sz) instead of xcalloc(1, sz)

* bpf.c (BEGIN_BPF_CMD_DECODER(BPF_OBJ_GET_INFO_BY_FD)): Use xzalloc
instead of xcalloc of one-item-sized array.
* kvm.c (vcpu_alloc): Likewise.
* perf.c (fetch_perf_event_attr): Likewise.
* syscall.c (ptrace_get_scno): Likewise.

xmalloc: introduce xzalloc

* xmalloc.h (xmalloc, xcalloc, xreallocarray): Document.
(xzalloc): New function, a thin wrapper around xcalloc with xmalloc
interface.

Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>

Rename the stat struct used internally by strace to strace_stat_t

* largefile_wrappers.h (struct_stat): Rename to strace_stat_t.
* strace.c (startup_child): Rename struct_stat to strace_stat_t.
* util.c (printdev): Likewise.

Move open_file to largefile_wrappers.h

* util.c (open_file): Move it ...
* largefile_wrappers.h: ... here.

tests: robustify bpf-obj_get_info_by_fd test against future kernels

* tests/bpf-obj_get_info_by_fd.c (print_prog_load, main): Change
log_level from 42 to 7, to placate Linux kernels containing commit
v5.2-rc1~133^2~193^2~18^2~9.

bpf: add support for new fields in struct bpf_prog_info

* bpf_attr.h (struct bpf_prog_info_struct): Add run_time_ns and run_cnt
fields.
* bpf.c (print_bpf_prog_info): Decode run_time_ns and run_cnt fields
introduced by Linux kernel commit v5.1-rc1~178^2~17^2~15^2~2.
* NEWS: Mention it.
* tests/bpf-obj_get_info_by_fd.c (main): Update expected output.

xlat: update FAN_* constants

* xlat/fan_mark_flags.in (FAN_MARK_FILESYSTEM): New constant
introduced by Linux kernel commit v4.20-rc1~75^2~10.
* tests/fanotify_mark.c (main): Update expected output.

xlat: update IPV6_* constants

* xlat/sock_ipv6_options.in (IPV6_MULTICAST_ALL): New constant
introduced by Linux kernel commit v4.20-rc1~14^2~384.
(IPV6_ROUTER_ALERT_ISOLATE): New constant introduced
by Linux kernel commit v5.1-rc1~178^2~22.
* NEWS: Mention this.

xlat: update F_SEAL_* constants

* xlat/f_seals.in (F_SEAL_FUTURE_WRITE): New constant introduced
by Linux kernel commit v5.1-rc1~152^2~49.
* NEWS: Mention this.