From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 67992C47404 for ; Fri, 11 Oct 2019 16:48:47 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2CA55206CD for ; Fri, 11 Oct 2019 16:48:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2CA55206CD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=virtuozzo.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:54140 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIy5t-0004Mp-SJ for qemu-devel@archiver.kernel.org; Fri, 11 Oct 2019 12:48:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36744) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iIxR6-0006Wr-3b for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iIxR2-0004fP-Bl for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:35 -0400 Received: from relay.sw.ru ([185.231.240.75]:48296) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iIxR1-0004NO-V9 for qemu-devel@nongnu.org; Fri, 11 Oct 2019 12:06:32 -0400 Received: from [10.94.3.0] (helo=kvm.qa.sw.ru) by relay.sw.ru with esmtp (Exim 4.92.2) (envelope-from ) id 1iIxQq-0003XG-Jy; Fri, 11 Oct 2019 19:06:20 +0300 From: Vladimir Sementsov-Ogievskiy To: qemu-devel@nongnu.org Subject: [RFC v5 071/126] Dump: introduce ERRP_AUTO_PROPAGATE Date: Fri, 11 Oct 2019 19:04:57 +0300 Message-Id: <20191011160552.22907-72-vsementsov@virtuozzo.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191011160552.22907-1-vsementsov@virtuozzo.com> References: <20191011160552.22907-1-vsementsov@virtuozzo.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [fuzzy] X-Received-From: 185.231.240.75 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , vsementsov@virtuozzo.com, armbru@redhat.com, Greg Kurz Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" If we want to add some info to errp (by error_prepend() or error_append_hint()), we must use the ERRP_AUTO_PROPAGATE macro. Otherwise, this info will not be added when errp == &fatal_err (the program will exit prior to the error_append_hint() or error_prepend() call). Fix such cases. If we want to check error after errp-function call, we need to introduce local_err and than propagate it to errp. Instead, use ERRP_AUTO_PROPAGATE macro, benefits are: 1. No need of explicit error_propagate call 2. No need of explicit local_err variable: use errp directly 3. ERRP_AUTO_PROPAGATE leaves errp as is if it's not NULL or &error_fatel, this means that we don't break error_abort (we'll abort on error_set, not on error_propagate) This commit (together with its neighbors) was generated by for f in $(git grep -l errp \*.[ch]); do \ spatch --sp-file scripts/coccinelle/auto-propagated-errp.cocci \ --macro-file scripts/cocci-macro-file.h --in-place --no-show-diff $f; \ done; then fix a bit of compilation problems: coccinelle for some reason leaves several f() { ... goto out; ... out: } patterns, with "out:" at function end. then ./python/commit-per-subsystem.py MAINTAINERS "$(< auto-msg)" (auto-msg was a file with this commit message) Still, for backporting it may be more comfortable to use only the first command and then do one huge commit. Reported-by: Kevin Wolf Reported-by: Greg Kurz Signed-off-by: Vladimir Sementsov-Ogievskiy --- dump/dump.c | 151 ++++++++++++++++++++---------------------------- dump/win_dump.c | 29 ++++------ 2 files changed, 76 insertions(+), 104 deletions(-) diff --git a/dump/dump.c b/dump/dump.c index 6fb6e1245a..421e33d684 100644 --- a/dump/dump.c +++ b/dump/dump.c @@ -387,23 +387,21 @@ static void write_data(DumpState *s, void *buf, int length, Error **errp) static void write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start, int64_t size, Error **errp) { + ERRP_AUTO_PROPAGATE(); int64_t i; - Error *local_err = NULL; for (i = 0; i < size / s->dump_info.page_size; i++) { write_data(s, block->host_addr + start + i * s->dump_info.page_size, - s->dump_info.page_size, &local_err); - if (local_err) { - error_propagate(errp, local_err); + s->dump_info.page_size, errp); + if (*errp) { return; } } if ((size % s->dump_info.page_size) != 0) { write_data(s, block->host_addr + start + i * s->dump_info.page_size, - size % s->dump_info.page_size, &local_err); - if (local_err) { - error_propagate(errp, local_err); + size % s->dump_info.page_size, errp); + if (*errp) { return; } } @@ -473,11 +471,11 @@ static void get_offset_range(hwaddr phys_addr, static void write_elf_loads(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); hwaddr offset, filesz; MemoryMapping *memory_mapping; uint32_t phdr_index = 1; uint32_t max_index; - Error *local_err = NULL; if (s->have_section) { max_index = s->sh_info; @@ -491,14 +489,13 @@ static void write_elf_loads(DumpState *s, Error **errp) s, &offset, &filesz); if (s->dump_info.d_class == ELFCLASS64) { write_elf64_load(s, memory_mapping, phdr_index++, offset, - filesz, &local_err); + filesz, errp); } else { write_elf32_load(s, memory_mapping, phdr_index++, offset, - filesz, &local_err); + filesz, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } @@ -511,7 +508,7 @@ static void write_elf_loads(DumpState *s, Error **errp) /* write elf header, PT_NOTE and elf note to vmcore. */ static void dump_begin(DumpState *s, Error **errp) { - Error *local_err = NULL; + ERRP_AUTO_PROPAGATE(); /* * the vmcore's format is: @@ -539,73 +536,64 @@ static void dump_begin(DumpState *s, Error **errp) /* write elf header to vmcore */ if (s->dump_info.d_class == ELFCLASS64) { - write_elf64_header(s, &local_err); + write_elf64_header(s, errp); } else { - write_elf32_header(s, &local_err); + write_elf32_header(s, errp); } - if (local_err) { - error_propagate(errp, local_err); + if (*errp) { return; } if (s->dump_info.d_class == ELFCLASS64) { /* write PT_NOTE to vmcore */ - write_elf64_note(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf64_note(s, errp); + if (*errp) { return; } /* write all PT_LOAD to vmcore */ - write_elf_loads(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf_loads(s, errp); + if (*errp) { return; } /* write section to vmcore */ if (s->have_section) { - write_elf_section(s, 1, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf_section(s, 1, errp); + if (*errp) { return; } } /* write notes to vmcore */ - write_elf64_notes(fd_write_vmcore, s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf64_notes(fd_write_vmcore, s, errp); + if (*errp) { return; } } else { /* write PT_NOTE to vmcore */ - write_elf32_note(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf32_note(s, errp); + if (*errp) { return; } /* write all PT_LOAD to vmcore */ - write_elf_loads(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf_loads(s, errp); + if (*errp) { return; } /* write section to vmcore */ if (s->have_section) { - write_elf_section(s, 0, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf_section(s, 0, errp); + if (*errp) { return; } } /* write notes to vmcore */ - write_elf32_notes(fd_write_vmcore, s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf32_notes(fd_write_vmcore, s, errp); + if (*errp) { return; } } @@ -641,9 +629,9 @@ static int get_next_block(DumpState *s, GuestPhysBlock *block) /* write all memory to vmcore */ static void dump_iterate(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); GuestPhysBlock *block; int64_t size; - Error *local_err = NULL; do { block = s->next_block; @@ -655,9 +643,8 @@ static void dump_iterate(DumpState *s, Error **errp) size -= block->target_end - (s->begin + s->length); } } - write_memory(s, block, s->start, size, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_memory(s, block, s->start, size, errp); + if (*errp) { return; } @@ -666,11 +653,10 @@ static void dump_iterate(DumpState *s, Error **errp) static void create_vmcore(DumpState *s, Error **errp) { - Error *local_err = NULL; + ERRP_AUTO_PROPAGATE(); - dump_begin(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + dump_begin(s, errp); + if (*errp) { return; } @@ -807,6 +793,7 @@ static bool note_name_equal(DumpState *s, /* write common header, sub header and elf note to vmcore */ static void create_header32(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); DiskDumpHeader32 *dh = NULL; KdumpSubHeader32 *kh = NULL; size_t size; @@ -815,7 +802,6 @@ static void create_header32(DumpState *s, Error **errp) uint32_t bitmap_blocks; uint32_t status = 0; uint64_t offset_note; - Error *local_err = NULL; /* write common header, the version of kdump-compressed format is 6th */ size = sizeof(DiskDumpHeader32); @@ -891,9 +877,8 @@ static void create_header32(DumpState *s, Error **errp) s->note_buf_offset = 0; /* use s->note_buf to store notes temporarily */ - write_elf32_notes(buf_write_note, s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf32_notes(buf_write_note, s, errp); + if (*errp) { goto out; } if (write_buffer(s->fd, offset_note, s->note_buf, @@ -919,6 +904,7 @@ out: /* write common header, sub header and elf note to vmcore */ static void create_header64(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); DiskDumpHeader64 *dh = NULL; KdumpSubHeader64 *kh = NULL; size_t size; @@ -927,7 +913,6 @@ static void create_header64(DumpState *s, Error **errp) uint32_t bitmap_blocks; uint32_t status = 0; uint64_t offset_note; - Error *local_err = NULL; /* write common header, the version of kdump-compressed format is 6th */ size = sizeof(DiskDumpHeader64); @@ -1003,9 +988,8 @@ static void create_header64(DumpState *s, Error **errp) s->note_buf_offset = 0; /* use s->note_buf to store notes temporarily */ - write_elf64_notes(buf_write_note, s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_elf64_notes(buf_write_note, s, errp); + if (*errp) { goto out; } @@ -1031,14 +1015,13 @@ out: static void write_dump_header(DumpState *s, Error **errp) { - Error *local_err = NULL; + ERRP_AUTO_PROPAGATE(); if (s->dump_info.d_class == ELFCLASS32) { - create_header32(s, &local_err); + create_header32(s, errp); } else { - create_header64(s, &local_err); + create_header64(s, errp); } - error_propagate(errp, local_err); } static size_t dump_bitmap_get_bufsize(DumpState *s) @@ -1472,8 +1455,8 @@ out: static void create_kdump_vmcore(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); int ret; - Error *local_err = NULL; /* * the kdump-compressed format is: @@ -1503,21 +1486,18 @@ static void create_kdump_vmcore(DumpState *s, Error **errp) return; } - write_dump_header(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_dump_header(s, errp); + if (*errp) { return; } - write_dump_bitmap(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_dump_bitmap(s, errp); + if (*errp) { return; } - write_dump_pages(s, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_dump_pages(s, errp); + if (*errp) { return; } @@ -1647,10 +1627,10 @@ static void dump_init(DumpState *s, int fd, bool has_format, DumpGuestMemoryFormat format, bool paging, bool has_filter, int64_t begin, int64_t length, Error **errp) { + ERRP_AUTO_PROPAGATE(); VMCoreInfoState *vmci = vmcoreinfo_find(); CPUState *cpu; int nr_cpus; - Error *err = NULL; int ret; s->has_format = has_format; @@ -1769,9 +1749,8 @@ static void dump_init(DumpState *s, int fd, bool has_format, /* get memory mapping */ if (paging) { - qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, &err); - if (err != NULL) { - error_propagate(errp, err); + qemu_get_guest_memory_mapping(&s->list, &s->guest_phys_blocks, errp); + if (*errp) { goto cleanup; } } else { @@ -1870,33 +1849,32 @@ cleanup: /* this operation might be time consuming. */ static void dump_process(DumpState *s, Error **errp) { - Error *local_err = NULL; + ERRP_AUTO_PROPAGATE(); DumpQueryResult *result = NULL; if (s->has_format && s->format == DUMP_GUEST_MEMORY_FORMAT_WIN_DMP) { #ifdef TARGET_X86_64 - create_win_dump(s, &local_err); + create_win_dump(s, errp); #endif } else if (s->has_format && s->format != DUMP_GUEST_MEMORY_FORMAT_ELF) { - create_kdump_vmcore(s, &local_err); + create_kdump_vmcore(s, errp); } else { - create_vmcore(s, &local_err); + create_vmcore(s, errp); } /* make sure status is written after written_size updates */ smp_wmb(); atomic_set(&s->status, - (local_err ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED)); + (*errp ? DUMP_STATUS_FAILED : DUMP_STATUS_COMPLETED)); /* send DUMP_COMPLETED message (unconditionally) */ result = qmp_query_dump(NULL); /* should never fail */ assert(result); - qapi_event_send_dump_completed(result, !!local_err, (local_err ? \ - error_get_pretty(local_err) : NULL)); + qapi_event_send_dump_completed(result, !!*errp, (*errp ? \ + error_get_pretty(*errp) : NULL)); qapi_free_DumpQueryResult(result); - error_propagate(errp, local_err); dump_cleanup(s); } @@ -1925,10 +1903,10 @@ void qmp_dump_guest_memory(bool paging, const char *file, int64_t length, bool has_format, DumpGuestMemoryFormat format, Error **errp) { + ERRP_AUTO_PROPAGATE(); const char *p; int fd = -1; DumpState *s; - Error *local_err = NULL; bool detach_p = false; if (runstate_check(RUN_STATE_INMIGRATE)) { @@ -2013,9 +1991,8 @@ void qmp_dump_guest_memory(bool paging, const char *file, dump_state_prepare(s); dump_init(s, fd, has_format, format, paging, has_begin, - begin, length, &local_err); - if (local_err) { - error_propagate(errp, local_err); + begin, length, errp); + if (*errp) { atomic_set(&s->status, DUMP_STATUS_FAILED); return; } diff --git a/dump/win_dump.c b/dump/win_dump.c index eda2a48974..7e905e7589 100644 --- a/dump/win_dump.c +++ b/dump/win_dump.c @@ -60,15 +60,14 @@ static size_t write_run(WinDumpPhyMemRun64 *run, int fd, Error **errp) static void write_runs(DumpState *s, WinDumpHeader64 *h, Error **errp) { + ERRP_AUTO_PROPAGATE(); WinDumpPhyMemDesc64 *desc = &h->PhysicalMemoryBlock; WinDumpPhyMemRun64 *run = desc->Run; - Error *local_err = NULL; int i; for (i = 0; i < desc->NumberOfRuns; i++) { - s->written_size += write_run(run + i, s->fd, &local_err); - if (local_err) { - error_propagate(errp, local_err); + s->written_size += write_run(run + i, s->fd, errp); + if (*errp) { return; } } @@ -317,12 +316,12 @@ static void restore_context(WinDumpHeader64 *h, void create_win_dump(DumpState *s, Error **errp) { + ERRP_AUTO_PROPAGATE(); WinDumpHeader64 *h = (WinDumpHeader64 *)(s->guest_note + VMCOREINFO_ELF_NOTE_HDR_SIZE); X86CPU *first_x86_cpu = X86_CPU(first_cpu); uint64_t saved_cr3 = first_x86_cpu->env.cr[3]; struct saved_context *saved_ctx = NULL; - Error *local_err = NULL; if (s->guest_note_size != sizeof(WinDumpHeader64) + VMCOREINFO_ELF_NOTE_HDR_SIZE) { @@ -330,9 +329,8 @@ void create_win_dump(DumpState *s, Error **errp) return; } - check_header(h, &local_err); - if (local_err) { - error_propagate(errp, local_err); + check_header(h, errp); + if (*errp) { return; } @@ -343,9 +341,8 @@ void create_win_dump(DumpState *s, Error **errp) first_x86_cpu->env.cr[3] = h->DirectoryTableBase; - check_kdbg(h, &local_err); - if (local_err) { - error_propagate(errp, local_err); + check_kdbg(h, errp); + if (*errp) { goto out_cr3; } @@ -358,9 +355,8 @@ void create_win_dump(DumpState *s, Error **errp) * to determine if the system-saved context is valid */ - patch_and_save_context(h, saved_ctx, &local_err); - if (local_err) { - error_propagate(errp, local_err); + patch_and_save_context(h, saved_ctx, errp); + if (*errp) { goto out_free; } @@ -372,9 +368,8 @@ void create_win_dump(DumpState *s, Error **errp) goto out_restore; } - write_runs(s, h, &local_err); - if (local_err) { - error_propagate(errp, local_err); + write_runs(s, h, errp); + if (*errp) { goto out_restore; } -- 2.21.0