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qemu-kvm/SOURCES/kvm-dump-Use-ERRP_GUARD.patch

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From 4ca61efe246d62d420eb332655c0c8ead4cc762b Mon Sep 17 00:00:00 2001
From: Janosch Frank <frankja@linux.ibm.com>
Date: Wed, 30 Mar 2022 12:35:55 +0000
Subject: [PATCH 13/42] dump: Use ERRP_GUARD()
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
RH-Author: Cédric Le Goater <clg@redhat.com>
RH-MergeRequest: 226: s390: Enhanced Interpretation for PCI Functions and Secure Execution guest dump
RH-Bugzilla: 1664378 2043909
RH-Acked-by: Thomas Huth <thuth@redhat.com>
RH-Acked-by: Cornelia Huck <cohuck@redhat.com>
RH-Acked-by: Jon Maloy <jmaloy@redhat.com>
RH-Commit: [13/41] f735cd1dab0230000cfadd878765fdf4647b239c
Let's move to the new way of handling errors before changing the dump
code. This patch has mostly been generated by the coccinelle script
scripts/coccinelle/errp-guard.cocci.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20220330123603.107120-2-frankja@linux.ibm.com>
(cherry picked from commit 86a518bba4f4d7c9016fc5b104fe1e58b00ad756)
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
dump/dump.c | 144 ++++++++++++++++++++++------------------------------
1 file changed, 61 insertions(+), 83 deletions(-)
diff --git a/dump/dump.c b/dump/dump.c
index 662d0a62cd..9876123f2e 100644
--- a/dump/dump.c
+++ b/dump/dump.c
@@ -390,23 +390,21 @@ 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_GUARD();
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;
}
}
@@ -476,11 +474,11 @@ static void get_offset_range(hwaddr phys_addr,
static void write_elf_loads(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
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;
@@ -494,14 +492,13 @@ 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;
}
@@ -514,7 +511,7 @@ 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_GUARD();
/*
* the vmcore's format is:
@@ -542,73 +539,64 @@ 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;
}
}
@@ -644,9 +632,9 @@ static int get_next_block(DumpState *s, GuestPhysBlock *block)
/* write all memory to vmcore */
static void dump_iterate(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
GuestPhysBlock *block;
int64_t size;
- Error *local_err = NULL;
do {
block = s->next_block;
@@ -658,9 +646,8 @@ 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;
}
@@ -669,11 +656,10 @@ static void dump_iterate(DumpState *s, Error **errp)
static void create_vmcore(DumpState *s, Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
- dump_begin(s, &local_err);
- if (local_err) {
- error_propagate(errp, local_err);
+ dump_begin(s, errp);
+ if (*errp) {
return;
}
@@ -810,6 +796,7 @@ 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_GUARD();
DiskDumpHeader32 *dh = NULL;
KdumpSubHeader32 *kh = NULL;
size_t size;
@@ -818,7 +805,6 @@ 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);
@@ -894,9 +880,8 @@ 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,
@@ -922,6 +907,7 @@ out:
/* write common header, sub header and elf note to vmcore */
static void create_header64(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
DiskDumpHeader64 *dh = NULL;
KdumpSubHeader64 *kh = NULL;
size_t size;
@@ -930,7 +916,6 @@ 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);
@@ -1006,9 +991,8 @@ 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;
}
@@ -1472,8 +1456,8 @@ out:
static void create_kdump_vmcore(DumpState *s, Error **errp)
{
+ ERRP_GUARD();
int ret;
- Error *local_err = NULL;
/*
* the kdump-compressed format is:
@@ -1503,21 +1487,18 @@ 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 +1628,10 @@ 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_GUARD();
VMCoreInfoState *vmci = vmcoreinfo_find();
CPUState *cpu;
int nr_cpus;
- Error *err = NULL;
int ret;
s->has_format = has_format;
@@ -1769,9 +1750,8 @@ 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 +1850,32 @@ cleanup:
/* this operation might be time consuming. */
static void dump_process(DumpState *s, Error **errp)
{
- Error *local_err = NULL;
+ ERRP_GUARD();
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();
qatomic_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 +1904,10 @@ void qmp_dump_guest_memory(bool paging, const char *file,
int64_t length, bool has_format,
DumpGuestMemoryFormat format, Error **errp)
{
+ ERRP_GUARD();
const char *p;
int fd = -1;
DumpState *s;
- Error *local_err = NULL;
bool detach_p = false;
if (runstate_check(RUN_STATE_INMIGRATE)) {
@@ -2028,9 +2007,8 @@ 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) {
qatomic_set(&s->status, DUMP_STATUS_FAILED);
return;
}
--
2.37.3
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