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2022-06-14cutils: add functions for IEC and SI prefixesPaolo Bonzini
Extract the knowledge of IEC and SI prefixes out of size_to_str and freq_to_str, so that it can be reused when printing statistics. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-05-28include: move qemu_*_exec_dir() to cutilsMarc-André Lureau
The function is required by get_relocated_path() (already in cutils), and used by qemu-ga and may be generally useful. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20220525144140.591926-2-marcandre.lureau@redhat.com>
2022-04-21include: move qemu_fdatasync() to osdepMarc-André Lureau
Move QEMU-specific code to util/osdep.c, so cutils can become a common subproject. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220420132624.2439741-22-marcandre.lureau@redhat.com>
2022-04-21include: move qemu_msync() to osdepMarc-André Lureau
The implementation depends on the OS. (and longer-term goal is to move cutils to a common subproject) Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com> Message-Id: <20220420132624.2439741-21-marcandre.lureau@redhat.com>
2022-04-06Remove qemu-common.h include from most unitsMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-33-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-06Move fcntl_setfl() to oslib-posixMarc-André Lureau
It is only implemented for POSIX anyway. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220323155743.1585078-30-marcandre.lureau@redhat.com> [Add braces around if statements. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-04-06Replace qemu_real_host_page variables with inlined functionsMarc-André Lureau
Replace the global variables with inlined helper functions. getpagesize() is very likely annotated with a "const" function attribute (at least with glibc), and thus optimization should apply even better. This avoids the need for a constructor initialization too. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Message-Id: <20220323155743.1585078-12-marcandre.lureau@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-03-22util: remove the net/net.h dependencyMarc-André Lureau
Move qemu_ether_ntoa() which is only needed in net/. Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2022-03-22util: remove needless includesMarc-André Lureau
Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2021-05-13cutils: fix memory leak in get_relocated_path()Stefano Garzarella
get_relocated_path() allocates a GString object and returns the character data (C string) to the caller without freeing the memory allocated for that object as reported by valgrind: 24 bytes in 1 blocks are definitely lost in loss record 2,805 of 6,532 at 0x4839809: malloc (vg_replace_malloc.c:307) by 0x55AABB8: g_malloc (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x55C2481: g_slice_alloc (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x55C4827: g_string_sized_new (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x55C4CEA: g_string_new (in /usr/lib64/libglib-2.0.so.0.6600.8) by 0x906314: get_relocated_path (cutils.c:1036) by 0x6E1F77: qemu_read_default_config_file (vl.c:2122) by 0x6E1F77: qemu_init (vl.c:2687) by 0x3E3AF8: main (main.c:49) Let's use g_string_free(gstring, false) to free only the GString object and transfer the ownership of the character data to the caller. Fixes: f4f5ed2cbd ("cutils: introduce get_relocated_path") Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20210412170255.231406-1-sgarzare@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2021-03-24utils: Work around mingw strto*l bug with 0xEric Blake
Mingw recognizes that "0x" has value 0 without setting errno, but fails to advance endptr to the trailing garbage 'x'. This in turn showed up in our recent testsuite additions for qemu_strtosz (commit 1657ba44b4 utils: Enhance testsuite for do_strtosz()); adjust our remaining tests to show that we now work around this windows bug. This patch intentionally fails check-syntax for use of strtol. Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210317143325.2165821-3-eblake@redhat.com> Message-Id: <20210323165308.15244-15-alex.bennee@linaro.org>
2021-03-24utils: Tighter tests for qemu_strtoszEric Blake
Our tests were not validating the return value in all cases, nor was it guaranteeing our documented claim that 'res' is unchanged on error. For that matter, it wasn't as thorough as the existing tests for qemu_strtoi() and friends for proving that endptr and res are sanely set. Enhancing the test found one case where we violated our documentation: namely, when failing with EINVAL when endptr is NULL, we shouldn't modify res. Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Thomas Huth <thuth@redhat.com> Message-Id: <20210317143325.2165821-2-eblake@redhat.com> Message-Id: <20210323165308.15244-14-alex.bennee@linaro.org>
2021-03-15utils: Use fixed-point arithmetic in qemu_strtoszRichard Henderson
Once we've parsed the fractional value, extract it into an integral 64-bit fraction. Perform the scaling with integer arithmetic, and simplify the overflow detection. Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <20210315155835.1970210-2-richard.henderson@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2021-03-08utils: Deprecate hex-with-suffix sizesEric Blake
Supporting '0x20M' looks odd, particularly since we have a 'B' suffix that is ambiguous for bytes, as well as a less-frequently-used 'E' suffix for extremely large exibytes. In practice, people using hex inputs are specifying values in bytes (and would have written 0x2000000, or possibly relied on default_suffix in the case of qemu_strtosz_MiB), and the use of scaling suffixes makes the most sense for inputs in decimal (where the user would write 32M). But rather than outright dropping support for hex-with-suffix, let's follow our deprecation policy. Sadly, since qemu_strtosz() does not have an Err** parameter, and plumbing that in would be a much larger task, we instead go with just directly emitting the deprecation warning to stderr. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20210211204438.1184395-4-eblake@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2021-03-08utils: Improve qemu_strtosz() to have 64 bits of precisionEric Blake
We have multiple clients of qemu_strtosz (qemu-io, the opts visitor, the keyval visitor), and it gets annoying that edge-case testing is impacted by implicit rounding to 53 bits of precision due to parsing with strtod(). As an example posted by Rich Jones: $ nbdkit memory $(( 2**63 - 2**30 )) --run \ 'build/qemu-io -f raw "$uri" -c "w -P 3 $(( 2**63 - 2**30 - 512 )) 512" ' write failed: Input/output error because 9223372035781033472 got rounded to 0x7fffffffc0000000 which is out of bounds. It is also worth noting that our existing parser, by virtue of using strtod(), accepts decimal AND hex numbers, even though test-cutils previously lacked any coverage of the latter until the previous patch. We do have existing clients that expect a hex parse to work (for example, iotest 33 using qemu-io -c "write -P 0xa 0x200 0x400"), but strtod() parses "08" as 8 rather than as an invalid octal number, so we know there are no clients that depend on octal. Our use of strtod() also means that "0x1.8k" would actually parse as 1536 (the fraction is 8/16), rather than 1843 (if the fraction were 8/10); but as this was not covered in the testsuite, I have no qualms forbidding hex fractions as invalid, so this patch declares that the use of fractions is only supported with decimal input, and enhances the testsuite to document that. Our previous use of strtod() meant that -1 parsed as a negative; now that we parse with strtoull(), negative values can wrap around modulo 2^64, so we have to explicitly check whether the user passed in a '-'; and make it consistent to also reject '-0'. This has the minor effect of treating negative values as EINVAL (with no change to endptr) rather than ERANGE (with endptr advanced to what was parsed), visible in the updated iotest output. We also had no testsuite coverage of "1.1e0k", which happened to parse under strtod() but is unlikely to occur in practice; as long as we are making things more robust, it is easy enough to reject the use of exponents in a strtod parse. The fix is done by breaking the parse into an integer prefix (no loss in precision), rejecting negative values (since we can no longer rely on strtod() to do that), determining if a decimal or hexadecimal parse was intended (with the new restriction that a fractional hex parse is not allowed), and where appropriate, using a floating point fractional parse (where we also scan to reject use of exponents in the fraction). The bulk of the patch is then updates to the testsuite to match our new precision, as well as adding new cases we reject (whether they were rejected or inadvertently accepted before). Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20210211204438.1184395-3-eblake@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2021-02-16util/cutils: Skip "." when looking for next directory componentStefan Weil
When looking for the next directory component, a "." component is now skipped. This fixes the path(s) used for firmware lookup for the prefix == bindir case which is standard for QEMU on Windows and where the internally used bindir value ends with "/.". Signed-off-by: Stefan Weil <sw@weilnetz.de> Message-Id: <20210208205752.2488774-1-sw@weilnetz.de> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-11-17util/cutils: Fix Coverity array overrun in freq_to_str()Philippe Mathieu-Daudé
Fix Coverity CID 1435957: Memory - illegal accesses (OVERRUN): >>> Overrunning array "suffixes" of 7 8-byte elements at element index 7 (byte offset 63) using index "idx" (which evaluates to 7). Note, the biggest input value freq_to_str() can accept is UINT64_MAX, which is ~18.446 EHz, less than 1000 EHz. Reported-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Luc Michel <luc@lmichel.fr> Message-id: 20201101215755.2021421-1-f4bug@amsat.org Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2020-11-03cutils: replace strdup with g_strdupPaolo Bonzini
Memory returned by get_relocated_path must be freed with free or g_free depending on the path that the function took; Coverity takes exception to this practice. The fix lets caller use g_free as is standard in QEMU. While at it, mention the requirements on the caller in the doc comment. Suggested-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-26win32: boot broken when bind & data dir are the sameSunil Muthuswamy
With upstream commit#ea1edcd7da1a "vl: relocate paths to data directories", the data dir logic was unified between POSIX & Win32. That patch moved to using 'get_relocated_path()', to find the data dir. There is a latent bug in get_relocated_path which can cause it to spin indefinitely, when the bind dir is the same as the passed in dir (in this case, it was the data dir). Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Message-Id: <SN4PR2101MB08802BF242C429A15DDB32ACC01B0@SN4PR2101MB0880.namprd21.prod.outlook.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-16util/cutils: Introduce freq_to_str() to display Hertz unitsPhilippe Mathieu-Daudé
Introduce freq_to_str() to convert frequency values in human friendly units using the SI units for Hertz. Suggested-by: Luc Michel <luc@lmichel.fr> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Reviewed-by: Luc Michel <luc@lmichel.fr> Message-Id: <20201012095804.3335117-2-f4bug@amsat.org>
2020-09-30cutils: introduce get_relocated_pathPaolo Bonzini
Add the function that will compute a relocated version of the directories in CONFIG_QEMU_*DIR and CONFIG_QEMU_*PATH. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2019-12-18util/cutils: Turn FIXME comment into QEMU_BUILD_BUG_ON()Markus Armbruster
qemu_strtoi64() assumes int64_t is long long. This is marked FIXME. Replace by a QEMU_BUILD_BUG_ON() to avoid surprises. Same for qemu_strtou64(). Fix a typo in qemu_strtoul()'s contract while there. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191125133846.27790-2-armbru@redhat.com> [lv: removed trailing whitespace] Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-12-16Memory: Enable writeback for given memory regionBeata Michalska
Add an option to trigger memory writeback to sync given memory region with the corresponding backing store, case one is available. This extends the support for persistent memory, allowing syncing on-demand. Signed-off-by: Beata Michalska <beata.michalska@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20191121000843.24844-3-beata.michalska@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-11-25util/cutils: Fix incorrect integer->float conversion caught by clangFangrui Song
Clang does not like do_strtosz()'s code to guard against overflow: qemu/util/cutils.c:245:23: error: implicit conversion from 'unsigned long' to 'double' changes value from 18446744073709550592 to 18446744073709551616 [-Werror,-Wimplicit-int-float-conversion] The warning will be enabled by default in clang 10. It is not available for clang <= 9. val * mul >= 0xfffffffffffffc00 is indeed wrong. 0xfffffffffffffc00 is not representable exactly as double. It's half-way between the representable values 0xfffffffffffff800 and 0x10000000000000000. Which one we get is implementation-defined. Bad. We want val * mul > (the largest uint64_t exactly representable as double). That's 0xfffffffffffff800. Write it as nextafter(0x1p64, 0) with a suitable comment. Signed-off-by: Fangrui Song <i@maskray.me> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Patch split, commit message improved] Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20191122080039.12771-3-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Juan Quintela <quintela@redhat.com>
2019-07-15cutils: remove one unnecessary pointer operationWei Yang
Since we will not operate on the next address pointed by out, it is not necessary to do addition on it. After removing the operation, the function size reduced 16/18 bytes. Signed-off-by: Wei Yang <richardw.yang@linux.intel.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190610030852.16039-2-richardw.yang@linux.intel.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2019-06-12Include qemu-common.h exactly where neededMarkus Armbruster
No header includes qemu-common.h after this commit, as prescribed by qemu-common.h's file comment. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-5-armbru@redhat.com> [Rebased with conflicts resolved automatically, except for include/hw/arm/xlnx-zynqmp.h hw/arm/nrf51_soc.c hw/arm/msf2-soc.c block/qcow2-refcount.c block/qcow2-cluster.c block/qcow2-cache.c target/arm/cpu.h target/lm32/cpu.h target/m68k/cpu.h target/mips/cpu.h target/moxie/cpu.h target/nios2/cpu.h target/openrisc/cpu.h target/riscv/cpu.h target/tilegx/cpu.h target/tricore/cpu.h target/unicore32/cpu.h target/xtensa/cpu.h; bsd-user/main.c and net/tap-bsd.c fixed up]
2019-06-11qemu-common: Move qemu_isalnum() etc. to qemu/ctype.hMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190523143508.25387-3-armbru@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
2019-05-22cutils: Simplify how parse_uint() checks for whitespaceMarkus Armbruster
Use qemu_isspace() so we don't have to cast to unsigned char. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20190514180311.16028-7-armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
2019-04-30cutils: Fix size_to_str() on 32-bit platformsEric Blake
When extracting a human-readable size formatter, we changed 'uint64_t div' pre-patch to 'unsigned long div' post-patch. Which breaks on 32-bit platforms, resulting in 'inf' instead of intended values larger than 999GB. Fixes: 22951aaa CC: qemu-stable@nongnu.org Reported-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2018-12-13cutils: Fix qemu_strtosz() & friends to reject non-finite sizesDavid Hildenbrand
qemu_strtosz() & friends reject NaNs, but happily accept infinities. They shouldn't. Fix that. The fix makes use of qemu_strtod_finite(). To avoid ugly casts, change the @end parameter of qemu_strtosz() & friends from char ** to const char **. Also, add two test cases, testing that "inf" and "NaN" are properly rejected. While at it, also fixup the function documentation. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20181121164421.20780-3-david@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-12-13cutils: Add qemu_strtod() and qemu_strtod_finite()David Hildenbrand
Let's provide a wrapper for strtod(). Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20181121164421.20780-2-david@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2018-12-11cutils: Assert in-range base for string-to-integer conversionsEric Blake
POSIX states that the value of endptr is unspecified if strtol() fails with EINVAL due to an invalid base argument. Since none of the callers to check_strtox_error() initialized endptr, we could end up propagating uninitialized data back to a caller on error. However, passing an out-of-range base is already a sign of poor programming, so let's just assert that base is in range, at which point check_strtox_error() can be tightened to assert that it is receiving an initialized ep that points somewhere within the caller's original string, regardless of whether strto*() succeeded or failed with ERANGE. Reported-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20181206151856.77503-1-eblake@redhat.com> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2018-10-05cutils: add qemu_pstrcmp0()Marc-André Lureau
A char** variant of g_strcmp0(). Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com>
2018-06-29cutils: Provide strchrnulKeno Fischer
strchrnul is a GNU extension and thus unavailable on a number of targets. In the review for a commit removing strchrnul from 9p, I was asked to create a qemu_strchrnul helper to factor out this functionality. Do so, and use it in a number of other places in the code base that inlined the replacement pattern in a place where strchrnul could be used. Signed-off-by: Keno Fischer <keno@juliacomputing.com> Acked-by: Greg Kurz <groug@kaod.org> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Greg Kurz <groug@kaod.org>
2018-03-13cutils: add qemu_strtoi & qemu_strtoui parsers for int/unsigned int typesDaniel P. Berrange
There are qemu_strtoNN functions for various sized integers. This adds two more for plain int & unsigned int types, with suitable range checking. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-09-19Convert remaining single line fprintf() to warn_report()Alistair Francis
Convert any remaining uses of fprintf(stderr, "warning:"... to use warn_report() instead. This helps standardise on a single method of printing warnings to the user. All of the warnings were changed using this command: find ./* -type f -exec sed -i 's|fprintf(.*".*warning[,:] |warn_report("|Ig' {} + The #include lines and chagnes to the test Makefile were manually updated to allow the code to compile. Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Message-Id: <2c94ac3bb116cc6b8ebbcd66a254920a69665515.1503077821.git.alistair.francis@xilinx.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-05-17utils: provide size_to_str()Peter Xu
Moving the algorithm from print_type_size() into size_to_str() so that other component can also leverage it. With that, refactor print_type_size(). The assert() in that logic is removed though, since even UINT64_MAX would not overflow. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <1494562661-9063-3-git-send-email-peterx@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-02-23util/cutils: Change qemu_strtosz*() from int64_t to uint64_tMarkus Armbruster
This will permit its use in parse_option_size(). Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86) Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core) Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core) Cc: qemu-block@nongnu.org (open list:Block layer core) Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <1487708048-2131-24-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Return qemu_strtosz*() error and value separatelyMarkus Armbruster
This makes qemu_strtosz(), qemu_strtosz_mebi() and qemu_strtosz_metric() similar to qemu_strtoi64(), except negative values are rejected. Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86) Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core) Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core) Cc: qemu-block@nongnu.org (open list:Block layer core) Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <1487708048-2131-23-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Let qemu_strtosz*() optionally reject trailing crapMarkus Armbruster
Change the qemu_strtosz() & friends to return -EINVAL when @endptr is null and the conversion doesn't consume the string completely. Matches how qemu_strtol() & friends work. Only test_qemu_strtosz_simple() passes a null @endptr. No functional change there, because its conversion consumes the string. Simplify callers that use @endptr only to fail when it doesn't point to '\0' to pass a null @endptr instead. Cc: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: Eduardo Habkost <ehabkost@redhat.com> (maintainer:X86) Cc: Kevin Wolf <kwolf@redhat.com> (supporter:Block layer core) Cc: Max Reitz <mreitz@redhat.com> (supporter:Block layer core) Cc: qemu-block@nongnu.org (open list:Block layer core) Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <1487708048-2131-22-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Drop QEMU_STRTOSZ_DEFSUFFIX_* macrosMarkus Armbruster
Writing QEMU_STRTOSZ_DEFSUFFIX_* instead of '*' gains nothing. Get rid of these eyesores. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <1487708048-2131-18-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: New qemu_strtosz()Markus Armbruster
Most callers of qemu_strtosz_suffix() pass QEMU_STRTOSZ_DEFSUFFIX_B. Capture the pattern in new qemu_strtosz(). Inline qemu_strtosz_suffix() into its only remaining caller. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1487708048-2131-17-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Rename qemu_strtosz() to qemu_strtosz_MiB()Markus Armbruster
With qemu_strtosz(), no suffix means mebibytes. It's used rarely. I'm going to add a similar function where no suffix means bytes. Rename qemu_strtosz() to qemu_strtosz_MiB() to make the name qemu_strtosz() available for the new function. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1487708048-2131-16-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: New qemu_strtosz_metric()Markus Armbruster
To parse numbers with metric suffixes, we use qemu_strtosz_suffix_unit(nptr, &eptr, QEMU_STRTOSZ_DEFSUFFIX_B, 1000) Capture this in a new function for legibility: qemu_strtosz_metric(nptr, &eptr) Replace test_qemu_strtosz_suffix_unit() by test_qemu_strtosz_metric(). Rename qemu_strtosz_suffix_unit() to do_strtosz() and give it internal linkage. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1487708048-2131-15-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Clean up control flow around qemu_strtol() a bitMarkus Armbruster
Reorder check_strtox_error() to make it obvious that we always store through a non-null @endptr. Transform if (some error) { error case ... err = value for error case; } else { normal case ... err = value for normal case; } return err; to if (some error) { error case ... return value for error case; } normal case ... return value for normal case; Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1487708048-2131-9-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Clean up variable names around qemu_strtol()Markus Armbruster
Name same things the same, different things differently. * qemu_strtol()'s parameter @nptr is called @p in check_strtox_error(). Rename the latter. * qemu_strtol()'s parameter @endptr is called @next in check_strtox_error(). Rename the latter. * qemu_strtol()'s variable @p is called @endptr in check_strtox_error(). Rename both to @ep. * qemu_strtol()'s variable @err is *negative* errno, check_strtox_error()'s parameter @err is *positive*. Rename the latter to @libc_errno. Same for qemu_strtoul(), qemu_strtoi64(), qemu_strtou64(), of course. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1487708048-2131-8-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Rename qemu_strtoll(), qemu_strtoull()Markus Armbruster
The name qemu_strtoll() suggests conversion to long long, but it actually converts to int64_t. Rename to qemu_strtoi64(). The name qemu_strtoull() suggests conversion to unsigned long long, but it actually converts to uint64_t. Rename to qemu_strtou64(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <1487708048-2131-7-git-send-email-armbru@redhat.com>
2017-02-23util/cutils: Rewrite documentation of qemu_strtol() & friendsMarkus Armbruster
Fixes the following documentation bugs: * Fails to document that null @nptr is safe. * Fails to document that we return -EINVAL when no conversion could be performed (commit 47d4be1). * Confuses long long with int64_t, and unsigned long long with uint64_t. * Claims the unsigned conversions can underflow. They can't. While there, mark problematic assumptions that int64_t is long long, and uint64_t is unsigned long long with FIXME comments. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-Id: <1487708048-2131-6-git-send-email-armbru@redhat.com>
2016-09-13cutils: Move buffer_is_zero and subroutines to a new fileRichard Henderson
Signed-off-by: Richard Henderson <rth@twiddle.net> Message-Id: <1472496380-19706-2-git-send-email-rth@twiddle.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-07-14target-arm: Use Neon for zero checkingVijay
Use Neon instructions to perform zero checking of buffer. This is helps in reducing total migration time. Use case: Idle VM live migration with 4 VCPUS and 8GB ram running CentOS 7. Without Neon, the Total migration time is 3.5 Sec Migration status: completed total time: 3560 milliseconds downtime: 33 milliseconds setup: 5 milliseconds transferred ram: 297907 kbytes throughput: 685.76 mbps remaining ram: 0 kbytes total ram: 8519872 kbytes duplicate: 2062760 pages skipped: 0 pages normal: 69808 pages normal bytes: 279232 kbytes dirty sync count: 3 With Neon, the total migration time is 2.9 Sec Migration status: completed total time: 2960 milliseconds downtime: 65 milliseconds setup: 4 milliseconds transferred ram: 299869 kbytes throughput: 830.19 mbps remaining ram: 0 kbytes total ram: 8519872 kbytes duplicate: 2064313 pages skipped: 0 pages normal: 70294 pages normal bytes: 281176 kbytes dirty sync count: 3 Signed-off-by: Vijaya Kumar K <vijayak@cavium.com> Signed-off-by: Suresh <ksuresh@cavium.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1467190029-694-2-git-send-email-vijayak@cavium.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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