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2017-07-31qobject: Use simpler QDict/QList scalar insertion macrosEric Blake
We now have macros in place to make it less verbose to add a scalar to QDict and QList, so use them. Patch created mechanically via: spatch --sp-file scripts/coccinelle/qobject.cocci \ --macro-file scripts/cocci-macro-file.h --dir . --in-place then touched up manually to fix a couple of '?:' back to original spacing, as well as avoiding a long line in monitor.c. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Message-Id: <20170427215821.19397-7-eblake@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> (cherry picked from commit 46f5ac205a9dc5e2c24274c7df371509a286281f) * prereq for fc0932f Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
2017-03-07qobject: Propagate parse errors through qobject_from_json()Markus Armbruster
The next few commits will put the errors to use where appropriate. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1488317230-26248-13-git-send-email-armbru@redhat.com>
2017-03-07qjson: Abort earlier on qobject_from_jsonf() misuseMarkus Armbruster
Ignoring errors first, then asserting success is suboptimal. Pass &error_abort instead, so we abort earlier, and hopefully get more useful clues on what's wrong. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <1488317230-26248-11-git-send-email-armbru@redhat.com>
2017-03-07qobject: Propagate parse errors through qobject_from_jsonv()Markus Armbruster
The next few commits will put the errors to use where appropriate. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Message-Id: <1488317230-26248-9-git-send-email-armbru@redhat.com>
2017-02-24Merge remote-tracking branch 'remotes/armbru/tags/pull-util-2017-02-23' into ↵Peter Maydell
staging option cutils: Fix and clean up number conversions # gpg: Signature made Thu 23 Feb 2017 19:41:17 GMT # gpg: using RSA key 0x3870B400EB918653 # gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" # gpg: aka "Markus Armbruster <armbru@pond.sub.org>" # Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867 4E5F 3870 B400 EB91 8653 * remotes/armbru/tags/pull-util-2017-02-23: (24 commits) option: Fix checking of sizes for overflow and trailing crap util/cutils: Change qemu_strtosz*() from int64_t to uint64_t util/cutils: Return qemu_strtosz*() error and value separately util/cutils: Let qemu_strtosz*() optionally reject trailing crap qemu-img: Wrap cvtnum() around qemu_strtosz() test-cutils: Drop suffix from test_qemu_strtosz_simple() test-cutils: Use qemu_strtosz() more often util/cutils: Drop QEMU_STRTOSZ_DEFSUFFIX_* macros util/cutils: New qemu_strtosz() util/cutils: Rename qemu_strtosz() to qemu_strtosz_MiB() util/cutils: New qemu_strtosz_metric() test-cutils: Cover qemu_strtosz() around range limits test-cutils: Cover qemu_strtosz() with trailing crap test-cutils: Cover qemu_strtosz() invalid input test-cutils: Add missing qemu_strtosz()... endptr checks option: Fix to reject invalid and overflowing numbers util/cutils: Clean up control flow around qemu_strtol() a bit util/cutils: Clean up variable names around qemu_strtol() util/cutils: Rename qemu_strtoll(), qemu_strtoull() util/cutils: Rewrite documentation of qemu_strtol() & friends ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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>
2017-02-22qdict: Make qdict_get_qlist() safe like qdict_get_qdict()Markus Armbruster
Commit 89cad9f changed qdict_get_qdict() to return NULL instead of crash when the key doesn't exist or its value isn't a QDict. Commit 2d6421a neglected to do the same for qdict_get_qlist(). Correct that, and update the function comments. qdict_get_obj() is now unused, remove. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1487363905-9480-2-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2016-10-25qdict: implement a qdict_crumple method for un-flattening a dictDaniel P. Berrange
The qdict_flatten() method will take a dict whose elements are further nested dicts/lists and flatten them by concatenating keys. The qdict_crumple() method aims to do the reverse, taking a flat qdict, and turning it into a set of nested dicts/lists. It will apply nesting based on the key name, with a '.' indicating a new level in the hierarchy. If the keys in the nested structure are all numeric, it will create a list, otherwise it will create a dict. If the keys are a mixture of numeric and non-numeric, or the numeric keys are not in strictly ascending order, an error will be reported. As an example, a flat dict containing { 'foo.0.bar': 'one', 'foo.0.wizz': '1', 'foo.1.bar': 'two', 'foo.1.wizz': '2' } will get turned into a dict with one element 'foo' whose value is a list. The list elements will each in turn be dicts. { 'foo': [ { 'bar': 'one', 'wizz': '1' }, { 'bar': 'two', 'wizz': '2' } ], } If the key is intended to contain a literal '.', then it must be escaped as '..'. ie a flat dict { 'foo..bar': 'wizz', 'bar.foo..bar': 'eek', 'bar.hello': 'world' } Will end up as { 'foo.bar': 'wizz', 'bar': { 'foo.bar': 'eek', 'hello': 'world' } } The intent of this function is that it allows a set of QemuOpts to be turned into a nested data structure that mirrors the nesting used when the same object is defined over QMP. Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-Id: <1475246744-29302-3-git-send-email-berrange@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Parameter recursive dropped along with its tests; whitespace style touched up] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-07-12json-streamer: fix double-free on exiting during a parsePaolo Bonzini
Now that json-streamer tries not to leak tokens on incomplete parse, the tokens can be freed twice if QEMU destroys the json-streamer object during the parser->emit call. To fix this, create the new empty GQueue earlier, so that it is already in place when the old one is passed to parser->emit. Reported-by: Changlong Xie <xiecl.fnst@cn.fujitsu.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1467636059-12557-1-git-send-email-pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-07-06qapi: Improve use of qmp/types.hEric Blake
'qjson.h' is not a QObject subtype; include this file directly in .c files that are using it, rather than abusing qmp/types.h for that purpose. Meanwhile, for files that include a list of individual QObject subtypes, it's easier to just use qmp/types.h for that purpose. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1465490926-28625-2-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-06-30qobject: Correct JSON lexer grammar commentsEric Blake
Fix the regex comments describing what we parse as JSON. No change to the lexer itself, just to the comments: - The "" and '' string construction was missing alternation between different escape sequences - The construction for numbers forgot to handle optional leading '-' - The construction for numbers was grouped incorrectly so that it didn't permit '0.1' - The construction for numbers forgot to mark the exponent as optional - No mention that our '' string and "\'" are JSON extensions - No mention of our %d and related extensions when constructing JSON Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1465526889-8339-2-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Eric's regexp simplification squashed in] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-06-30json-streamer: Don't leak tokens on incomplete parseEric Blake
Valgrind complained about a number of leaks in tests/check-qobject-json: ==12657== definitely lost: 17,247 bytes in 1,234 blocks All of which had the same root cause: on an incomplete parse, we were abandoning the token queue without cleaning up the allocated data within each queue element. Introduced in commit 95385fe, when we switched from QList (which recursively frees contents) to g_queue (which does not). We don't yet require glib 2.32 with its g_queue_free_full(), so open-code it instead. CC: qemu-stable@nongnu.org Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1463608012-12760-1-git-send-email-eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-06-20coccinelle: Remove unnecessary variables for function return valueEduardo Habkost
Use Coccinelle script to replace 'ret = E; return ret' with 'return E'. The script will do the substitution only when the function return type and variable type are the same. Manual fixups: * audio/audio.c: coding style of "read (...)" and "write (...)" * block/qcow2-cluster.c: wrap line to make it shorter * block/qcow2-refcount.c: change indentation of wrapped line * target-tricore/op_helper.c: fix coding style of "remainder|quotient" * target-mips/dsp_helper.c: reverted changes because I don't want to argue about checkpatch.pl * ui/qemu-pixman.c: fix line indentation * block/rbd.c: restore blank line between declarations and statements Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Message-Id: <1465855078-19435-4-git-send-email-ehabkost@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> [Unused Coccinelle rule name dropped along with a redundant comment; whitespace touched up in block/qcow2-cluster.c; stale commit message paragraph deleted] Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-05-18qdict: fix unbounded stack warning for qdict_array_entriesPeter Xu
Here we use one g_strdup_printf() to replace the two stack allocated array, considering it's more convenient, safe, and as long as it's called rarely only when quorum device opens. This will remove the unbound stack warning when compiling with "-Wstack-usage=1000000". Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2016-03-22util: move declarations out of qemu-common.hVeronia Bahaa
Move declarations out of qemu-common.h for functions declared in utils/ files: e.g. include/qemu/path.h for utils/path.c. Move inline functions out of qemu-common.h and into new files (e.g. include/qemu/bcd.h) Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-03-22include/qemu/osdep.h: Don't include qapi/error.hMarkus Armbruster
Commit 57cb38b included qapi/error.h into qemu/osdep.h to get the Error typedef. Since then, we've moved to include qemu/osdep.h everywhere. Its file comment explains: "To avoid getting into possible circular include dependencies, this file should not include any other QEMU headers, with the exceptions of config-host.h, compiler.h, os-posix.h and os-win32.h, all of which are doing a similar job to this file and are under similar constraints." qapi/error.h doesn't do a similar job, and it doesn't adhere to similar constraints: it includes qapi-types.h. That's in excess of 100KiB of crap most .c files don't actually need. Add the typedef to qemu/typedefs.h, and include that instead of qapi/error.h. Include qapi/error.h in .c files that need it and don't get it now. Include qapi-types.h in qom/object.h for uint16List. Update scripts/clean-includes accordingly. Update it further to match reality: replace config.h by config-target.h, add sysemu/os-posix.h, sysemu/os-win32.h. Update the list of includes in the qemu/osdep.h comment quoted above similarly. This reduces the number of objects depending on qapi/error.h from "all of them" to less than a third. Unfortunately, the number depending on qapi-types.h shrinks only a little. More work is needed for that one. Signed-off-by: Markus Armbruster <armbru@redhat.com> [Fix compilation without the spice devel packages. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2016-02-08qobject: Document more shortcomings in our number handlingEric Blake
We've already documented that our JSON parsing is locale dependent; but we should also document that our JSON output has the same problem. Additionally, JSON requires finite values (you have to upgrade to JSON5 to get support for Inf or NaN), and our output truncates floating point numbers to the point of losing significant precision that could cause the receiver to read a different value. Sadly, this series is not going to be the one that addresses these problems. Fix some trailing whitespace I noticed in the vicinity. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1454075341-13658-2-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2016-02-04qobject: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1454089805-5470-12-git-send-email-peter.maydell@linaro.org
2015-12-17qapi: Convert QType into QAPI built-in enum typeEric Blake
What's more meta than using qapi to define qapi? :) Convert QType into a full-fledged[*] builtin qapi enum type, so that a subsequent patch can then use it as the discriminator type of qapi alternate types. Fortunately, the judicious use of 'prefix' in the qapi definition avoids churn to the spelling of the enum constants. To avoid circular definitions, we have to flip the order of inclusion between "qobject.h" vs. "qapi-types.h". Back in commit 28770e0, we had the latter include the former, so that we could use 'QObject *' for our implementation of 'any'. But that usage also works with only a forward declaration, whereas the definition of QObject requires QType to be a complete type. [*] The type has to be builtin, rather than declared in qapi/common.json, because we want to use it for alternates even when common.json is not included. But since it is the first builtin enum type, we have to add special cases to qapi-types and qapi-visit to only emit definitions once, even when two qapi files are being compiled into the same binary (the way we already handled builtin list types like 'intList'). We may need to revisit how multiple qapi files share common types, but that's a project for another day. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1449033659-25497-4-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-12-17qobject: Rename qtype_code to QTypeEric Blake
The name QType matches our CODING_STYLE conventions for type names in CamelCase. It also matches the fact that we are already naming all the enum members with a prefix of QTYPE, not QTYPE_CODE. And doing the rename will also make it easier for the next patch to use QAPI for providing the enum, which also wants CamelCase type names. Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1449033659-25497-3-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-12-17qobject: Simplify QObjectEric Blake
The QObject hierarchy is small enough, and unlikely to grow further (since we only use it to map to JSON and already cover all JSON types), that we can simplify things by not tracking a separate vtable, but just inline the code element of the vtable QType directly into QObject (renamed to type), and track a separate array of destroy functions. We can drop qnull_destroy_obj() in the process. The remaining QObject subclasses must export their destructor. This also has the nice benefit of moving the typename 'QType' out of the way, so that the next patch can repurpose it for a nicer name for 'qtype_code'. The various objects are still the same size (so no change in cache line pressure), but now have less indirection (although I didn't bother benchmarking to see if there is a noticeable speedup, as we don't have hard evidence that this was in a performance hotspot in the first place). A future patch could drop the refcnt size to 32 bits for a smaller struct on 64-bit architectures, if desired (we have limits on the largest JSON that we are willing to parse, and will probably never need to take full advantage of a 64-bit refcnt). Suggested-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <1449033659-25497-2-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-11-26qjson: Limit number of tokens in addition to total sizeMarkus Armbruster
Commit 29c75dd "json-streamer: limit the maximum recursion depth and maximum token count" attempts to guard against excessive heap usage by limiting total token size (it says "token count", but that's a lie). Total token size is a rather imprecise predictor of heap usage: many small tokens use more space than few large tokens with the same input size, because there's a constant per-token overhead: 37 bytes on my system. Tighten this up: limit the token count to 2Mi. Chosen to roughly match the 64MiB total token size limit. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1448486613-17634-13-git-send-email-armbru@redhat.com>
2015-11-26qjson: surprise, allocating 6 QObjects per token is expensivePaolo Bonzini
Replace the contents of the tokens GQueue with a simple struct. This cuts the amount of memory allocated by tests/check-qjson from ~500MB to ~20MB, and the execution time from 600ms to 80ms on my laptop. Still a lot (some could be saved by using an intrusive list, such as QSIMPLEQ, instead of the GQueue), but the savings are already massive and the right thing to do would probably be to get rid of json-streamer completely. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1448300659-23559-5-git-send-email-pbonzini@redhat.com> [Straightforwardly rebased on my patches] Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: store tokens in a GQueuePaolo Bonzini
Even though we still have the "streamer" concept, the tokens can now be deleted as they are read. While doing so convert from QList to GQueue, since the next step will make tokens not a QObject and we will have to do the conversion anyway. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1448300659-23559-4-git-send-email-pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Convert to parser to recursive descentMarkus Armbruster
We backtrack in parse_value(), even though JSON is LL(1) and thus can be parsed by straightforward recursive descent. Do exactly that. Based on an almost-correct patch from Paolo Bonzini. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-10-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: replace QString in JSONLexer with GStringPaolo Bonzini
JSONLexer only needs a simple resizable buffer. json-streamer.c can allocate memory for each token instead of relying on reference counting of QStrings. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1448300659-23559-2-git-send-email-pbonzini@redhat.com> [Straightforwardly rebased on my patches, checkpatch made happy] Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Inline token_is_escape() and simplifyMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-8-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Inline token_is_keyword() and simplifyMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-7-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Give each of the six structural chars its own token typeMarkus Armbruster
Simplifies things, because we always check for a specific one. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-6-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Spell out some silent assumptionsMarkus Armbruster
Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1448486613-17634-5-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-11-26qjson: Don't crash when input exceeds nesting limitMarkus Armbruster
We limit nesting depth and input size to defend against input triggering excessive heap or stack memory use (commit 29c75dd json-streamer: limit the maximum recursion depth and maximum token count). However, when the nesting limit is exceeded, parser_context_peek_token()'s assertion fails. Broken in commit 65c0f1e "json-parser: don't replicate tokens at each level of recursion". To reproduce stuff 1025 open braces or brackets into QMP. Fix by taking the error exit instead of the normal one. Reported-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1448486613-17634-3-git-send-email-armbru@redhat.com>
2015-11-26qjson: Apply nesting limit more sanelyMarkus Armbruster
The nesting limit from commit 29c75dd "json-streamer: limit the maximum recursion depth and maximum token count" applies separately to braces and brackets. This makes no sense. Apply it to their sum, because that's actually a measure of recursion depth. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-Id: <1448486613-17634-2-git-send-email-armbru@redhat.com>
2015-10-29qstring: Make conversion from QObject * accept nullMarkus Armbruster
qobject_to_qstring() crashes on null, which is a trap for the unwary. Return null instead, and simplify a few callers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444918537-18107-7-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-10-29qlist: Make conversion from QObject * accept nullMarkus Armbruster
qobject_to_qlist() crashes on null, which is a trap for the unwary. Return null instead. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444918537-18107-6-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-10-29qfloat qint: Make conversion from QObject * accept nullMarkus Armbruster
qobject_to_qfloat() and qobject_to_qint() crash on null, which is a trap for the unwary. Return null instead, and simplify a few callers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444918537-18107-5-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-10-29qdict: Make conversion from QObject * accept nullMarkus Armbruster
qobject_to_qdict() crashes on null, which is a trap for the unwary. Return null instead, and simplify a few callers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444918537-18107-4-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-10-29qbool: Make conversion from QObject * accept nullMarkus Armbruster
qobject_to_qbool() crashes on null, which is a trap for the unwary. Return null instead, and simplify a few callers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Message-Id: <1444918537-18107-3-git-send-email-armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22Include qapi/qmp/qerror.h exactly where neededMarkus Armbruster
In particular, don't include it into headers. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qerror: Finally unused, clean upMarkus Armbruster
Remove it except for two things in qerror.h: * Two #include to be cleaned up separately to avoid cluttering this patch. * The QERR_ macros. Mark as obsolete. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-06-22qobject: Use 'bool' inside qdictEric Blake
Now that qbool is fixed, let's fix getting and setting a bool value to a qdict member to also use C99 bool rather than int. I audited all callers to ensure that the changed return type will not cause any changed semantics. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-06-22qobject: Use 'bool' for qboolEric Blake
We require a C99 compiler, so let's use 'bool' instead of 'int' when dealing with boolean values. There are few enough clients to fix them all in one pass. Signed-off-by: Eric Blake <eblake@redhat.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Reviewed-by: Alberto Garcia <berto@igalia.com> Acked-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com>
2015-06-12qdict: Add qdict_{set,copy}_default()Kevin Wolf
In the block layer functions that determine options for a child block device, it's a common pattern to either copy options from the parent's options or to set a default string if the option isn't explicitly set yet for the child. Provide convenience functions so that it becomes a one-liner for each option. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com>
2015-06-12qdict: Add qdict_array_entries()Kevin Wolf
This counts the entries in a flattened array in a QDict without actually splitting the QDict into a QList. bdrv_open_image() doesn't take a QList, but rather a QDict and a key prefix string, so this is more convenient for block drivers which have a dynamically sized list of child nodes (e.g. Quorum) and are to be converted to using bdrv_open_image() as the standard interface for opening child nodes. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Max Reitz <mreitz@redhat.com>
2015-05-11json-parser: Accept 'null' in QMPEric Blake
We document that in QMP, the client may send any json-value for the optional "id" key, and then return that same value on reply (both success and failures, insofar as the failure happened after parsing the id). [Note that the output may not be identical to the input, as whitespace may change and since we may reorder keys within a json-object, but that this still constitutes the same json-value]. However, we were not handling the JSON literal null, which counts as a json-value per RFC 7159. Also, down the road, given the QAPI schema of {'*foo':'str'} or {'*foo':'ComplexType'}, we could decide to allow the QMP client to pass { "foo":null } instead of the current representation of { } where omitting the key is the only way to get at the default NULL value. Such a change might be useful for argument introspection (if a type in older qemu lacks 'foo' altogether, then an explicit "foo":null probe will force an easily distinguished error message for whether the optional "foo" key is even understood in newer qemu). And if we add default values to optional arguments, allowing an explicit null would be required for getting a NULL value associated with an optional string that has a non-null default. But all that can come at a later day. The 'check-unit' testsuite is enhanced to test that parsing produces the same object as explicitly requesting a reference to the special qnull object. In addition, I tested with: $ ./x86_64-softmmu/qemu-system-x86_64 -qmp stdio -nodefaults {"QMP": {"version": {"qemu": {"micro": 91, "minor": 2, "major": 2}, "package": ""}, "capabilities": []}} {"execute":"qmp_capabilities","id":null} {"return": {}, "id": null} {"id":{"a":null,"b":[1,null]},"execute":"quit"} {"return": {}, "id": {"a": null, "b": [1, null]}} {"timestamp": {"seconds": 1427742379, "microseconds": 423128}, "event": "SHUTDOWN"} Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-05-11qobject: Add a special null QObjectMarkus Armbruster
I'm going to fix the JSON parser to recognize null. The obvious representation of JSON null as (QObject *)NULL doesn't work, because the parser already uses it as an error value. Perhaps we should change it to free NULL for null, but that's more than I can do right now. Create a special null QObject instead. The existing QDict, QList, and QString all represent something that is a pointer in C and could therefore be associated with NULL. But right now, all three of these sub-types are always non-null once created, so the new null sentinel object is intentionally unrelated to them. Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2015-05-11qobject: Clean up around qtype_codeMarkus Armbruster
QTYPE_NONE is a sentinel value. No QObject has this type code. Document it properly. Fix dump_qobject() to abort() on QTYPE_NONE, just like for any other invalid type code. Fix to_json() to abort() on all invalid type codes, not just QTYPE_MAX. Clean up Property member qtype's type: it's a qtype_code. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-12-10qjson: Drop trailing space for pretty formattingMax Reitz
For the pretty formatting, the functions converting QDicts and QLists to JSON should not print a space after the comma separating objects, because a newline will emitted immediately afterwards, making the whitespace superfluous. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2014-06-23json-lexer: fix escaped backslash in single-quoted stringPaolo Bonzini
This made the lexer wait for a closing *double* quote. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Amos Kong <akong@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-06-11json-parser: drop superfluous assignment for token variableGonglei
Signed-off-by: ChenLiang <chenliang88@huawei.com> Signed-off-by: Gonglei <arei.gonglei@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
2014-05-19qdict: Add qdict_join()Max Reitz
This function joins two QDicts by absorbing one into the other. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Benoit Canet <benoit@irqsave.net> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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