dump: Propagate errors into qmp_dump_guest_memory()
The code calls dump_error() on error, and even passes it a suitable message. However, the message is thrown away, and its callers pass up only success/failure. All qmp_dump_guest_memory() can do is set a generic error. Propagate the errors properly, so qmp_dump_guest_memory() can return a more useful error. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
This commit is contained in:
zhanghailiang
Luiz Capitulino
parent
22644cd2c6
commit
37917da2d0
165
dump.c
165
dump.c
@ -81,9 +81,10 @@ static int dump_cleanup(DumpState *s)
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return 0;
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}
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static void dump_error(DumpState *s, const char *reason)
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static void dump_error(DumpState *s, const char *reason, Error **errp)
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{
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dump_cleanup(s);
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error_setg(errp, "%s", reason);
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}
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static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
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@ -99,7 +100,7 @@ static int fd_write_vmcore(const void *buf, size_t size, void *opaque)
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return 0;
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}
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static int write_elf64_header(DumpState *s)
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static int write_elf64_header(DumpState *s, Error **errp)
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{
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Elf64_Ehdr elf_header;
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int ret;
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@ -126,14 +127,14 @@ static int write_elf64_header(DumpState *s)
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ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write elf header.\n");
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dump_error(s, "dump: failed to write elf header", errp);
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return -1;
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}
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return 0;
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}
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static int write_elf32_header(DumpState *s)
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static int write_elf32_header(DumpState *s, Error **errp)
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{
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Elf32_Ehdr elf_header;
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int ret;
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@ -160,7 +161,7 @@ static int write_elf32_header(DumpState *s)
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ret = fd_write_vmcore(&elf_header, sizeof(elf_header), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write elf header.\n");
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dump_error(s, "dump: failed to write elf header", errp);
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return -1;
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}
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@ -169,7 +170,7 @@ static int write_elf32_header(DumpState *s)
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static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping,
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int phdr_index, hwaddr offset,
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hwaddr filesz)
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hwaddr filesz, Error **errp)
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{
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Elf64_Phdr phdr;
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int ret;
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@ -186,7 +187,7 @@ static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping,
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ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write program header table.\n");
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dump_error(s, "dump: failed to write program header table", errp);
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return -1;
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}
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@ -195,7 +196,7 @@ static int write_elf64_load(DumpState *s, MemoryMapping *memory_mapping,
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static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
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int phdr_index, hwaddr offset,
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hwaddr filesz)
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hwaddr filesz, Error **errp)
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{
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Elf32_Phdr phdr;
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int ret;
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@ -212,14 +213,14 @@ static int write_elf32_load(DumpState *s, MemoryMapping *memory_mapping,
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ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write program header table.\n");
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dump_error(s, "dump: failed to write program header table", errp);
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return -1;
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}
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return 0;
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}
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static int write_elf64_note(DumpState *s)
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static int write_elf64_note(DumpState *s, Error **errp)
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{
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Elf64_Phdr phdr;
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hwaddr begin = s->memory_offset - s->note_size;
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@ -235,7 +236,7 @@ static int write_elf64_note(DumpState *s)
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ret = fd_write_vmcore(&phdr, sizeof(Elf64_Phdr), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write program header table.\n");
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dump_error(s, "dump: failed to write program header table", errp);
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return -1;
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}
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@ -247,7 +248,8 @@ static inline int cpu_index(CPUState *cpu)
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return cpu->cpu_index + 1;
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}
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static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s)
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static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s,
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Error **errp)
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{
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CPUState *cpu;
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int ret;
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@ -257,7 +259,7 @@ static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s)
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id = cpu_index(cpu);
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ret = cpu_write_elf64_note(f, cpu, id, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write elf notes.\n");
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dump_error(s, "dump: failed to write elf notes", errp);
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return -1;
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}
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}
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@ -265,7 +267,7 @@ static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s)
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CPU_FOREACH(cpu) {
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ret = cpu_write_elf64_qemunote(f, cpu, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write CPU status.\n");
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dump_error(s, "dump: failed to write CPU status", errp);
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return -1;
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}
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}
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@ -273,7 +275,7 @@ static int write_elf64_notes(WriteCoreDumpFunction f, DumpState *s)
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return 0;
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}
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static int write_elf32_note(DumpState *s)
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static int write_elf32_note(DumpState *s, Error **errp)
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{
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hwaddr begin = s->memory_offset - s->note_size;
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Elf32_Phdr phdr;
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@ -289,14 +291,15 @@ static int write_elf32_note(DumpState *s)
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ret = fd_write_vmcore(&phdr, sizeof(Elf32_Phdr), s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write program header table.\n");
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dump_error(s, "dump: failed to write program header table", errp);
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return -1;
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}
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return 0;
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}
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static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s)
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static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s,
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Error **errp)
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{
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CPUState *cpu;
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int ret;
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@ -306,7 +309,7 @@ static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s)
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id = cpu_index(cpu);
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ret = cpu_write_elf32_note(f, cpu, id, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write elf notes.\n");
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dump_error(s, "dump: failed to write elf notes", errp);
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return -1;
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}
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}
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@ -314,7 +317,7 @@ static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s)
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CPU_FOREACH(cpu) {
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ret = cpu_write_elf32_qemunote(f, cpu, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write CPU status.\n");
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dump_error(s, "dump: failed to write CPU status", errp);
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return -1;
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}
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}
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@ -322,7 +325,7 @@ static int write_elf32_notes(WriteCoreDumpFunction f, DumpState *s)
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return 0;
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}
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static int write_elf_section(DumpState *s, int type)
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static int write_elf_section(DumpState *s, int type, Error **errp)
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{
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Elf32_Shdr shdr32;
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Elf64_Shdr shdr64;
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@ -344,20 +347,20 @@ static int write_elf_section(DumpState *s, int type)
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ret = fd_write_vmcore(&shdr, shdr_size, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to write section header table.\n");
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dump_error(s, "dump: failed to write section header table", errp);
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return -1;
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}
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return 0;
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}
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static int write_data(DumpState *s, void *buf, int length)
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static int write_data(DumpState *s, void *buf, int length, Error **errp)
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{
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int ret;
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ret = fd_write_vmcore(buf, length, s);
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if (ret < 0) {
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dump_error(s, "dump: failed to save memory.\n");
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dump_error(s, "dump: failed to save memory", errp);
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return -1;
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}
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@ -366,14 +369,14 @@ static int write_data(DumpState *s, void *buf, int length)
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/* write the memroy to vmcore. 1 page per I/O. */
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static int write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start,
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int64_t size)
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int64_t size, Error **errp)
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{
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int64_t i;
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int ret;
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for (i = 0; i < size / TARGET_PAGE_SIZE; i++) {
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ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE,
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TARGET_PAGE_SIZE);
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TARGET_PAGE_SIZE, errp);
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if (ret < 0) {
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return ret;
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}
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@ -381,7 +384,7 @@ static int write_memory(DumpState *s, GuestPhysBlock *block, ram_addr_t start,
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if ((size % TARGET_PAGE_SIZE) != 0) {
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ret = write_data(s, block->host_addr + start + i * TARGET_PAGE_SIZE,
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size % TARGET_PAGE_SIZE);
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size % TARGET_PAGE_SIZE, errp);
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if (ret < 0) {
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return ret;
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}
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@ -452,7 +455,7 @@ static void get_offset_range(hwaddr phys_addr,
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}
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}
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static int write_elf_loads(DumpState *s)
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static int write_elf_loads(DumpState *s, Error **errp)
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{
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hwaddr offset, filesz;
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MemoryMapping *memory_mapping;
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@ -472,10 +475,10 @@ static int write_elf_loads(DumpState *s)
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s, &offset, &filesz);
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if (s->dump_info.d_class == ELFCLASS64) {
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ret = write_elf64_load(s, memory_mapping, phdr_index++, offset,
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filesz);
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filesz, errp);
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} else {
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ret = write_elf32_load(s, memory_mapping, phdr_index++, offset,
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filesz);
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filesz, errp);
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}
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if (ret < 0) {
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@ -491,7 +494,7 @@ static int write_elf_loads(DumpState *s)
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}
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/* write elf header, PT_NOTE and elf note to vmcore. */
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static int dump_begin(DumpState *s)
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static int dump_begin(DumpState *s, Error **errp)
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{
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int ret;
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@ -521,9 +524,9 @@ static int dump_begin(DumpState *s)
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/* write elf header to vmcore */
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if (s->dump_info.d_class == ELFCLASS64) {
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ret = write_elf64_header(s);
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ret = write_elf64_header(s, errp);
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} else {
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ret = write_elf32_header(s);
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ret = write_elf32_header(s, errp);
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}
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if (ret < 0) {
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return -1;
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@ -531,47 +534,47 @@ static int dump_begin(DumpState *s)
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if (s->dump_info.d_class == ELFCLASS64) {
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/* write PT_NOTE to vmcore */
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if (write_elf64_note(s) < 0) {
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if (write_elf64_note(s, errp) < 0) {
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return -1;
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}
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/* write all PT_LOAD to vmcore */
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if (write_elf_loads(s) < 0) {
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if (write_elf_loads(s, errp) < 0) {
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return -1;
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}
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/* write section to vmcore */
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if (s->have_section) {
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if (write_elf_section(s, 1) < 0) {
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if (write_elf_section(s, 1, errp) < 0) {
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return -1;
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}
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}
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/* write notes to vmcore */
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if (write_elf64_notes(fd_write_vmcore, s) < 0) {
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if (write_elf64_notes(fd_write_vmcore, s, errp) < 0) {
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return -1;
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}
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} else {
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/* write PT_NOTE to vmcore */
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if (write_elf32_note(s) < 0) {
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if (write_elf32_note(s, errp) < 0) {
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return -1;
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}
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/* write all PT_LOAD to vmcore */
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if (write_elf_loads(s) < 0) {
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if (write_elf_loads(s, errp) < 0) {
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return -1;
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}
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/* write section to vmcore */
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if (s->have_section) {
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if (write_elf_section(s, 0) < 0) {
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if (write_elf_section(s, 0, errp) < 0) {
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return -1;
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}
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}
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/* write notes to vmcore */
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if (write_elf32_notes(fd_write_vmcore, s) < 0) {
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if (write_elf32_notes(fd_write_vmcore, s, errp) < 0) {
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return -1;
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}
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}
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@ -614,7 +617,7 @@ static int get_next_block(DumpState *s, GuestPhysBlock *block)
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}
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/* write all memory to vmcore */
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static int dump_iterate(DumpState *s)
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static int dump_iterate(DumpState *s, Error **errp)
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{
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GuestPhysBlock *block;
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int64_t size;
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@ -630,7 +633,7 @@ static int dump_iterate(DumpState *s)
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size -= block->target_end - (s->begin + s->length);
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}
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}
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ret = write_memory(s, block, s->start, size);
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ret = write_memory(s, block, s->start, size, errp);
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if (ret == -1) {
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return ret;
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}
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@ -643,16 +646,16 @@ static int dump_iterate(DumpState *s)
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}
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}
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static int create_vmcore(DumpState *s)
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static int create_vmcore(DumpState *s, Error **errp)
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{
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int ret;
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ret = dump_begin(s);
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ret = dump_begin(s, errp);
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if (ret < 0) {
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return -1;
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}
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ret = dump_iterate(s);
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ret = dump_iterate(s, errp);
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if (ret < 0) {
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return -1;
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}
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@ -738,7 +741,7 @@ static int buf_write_note(const void *buf, size_t size, void *opaque)
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}
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/* write common header, sub header and elf note to vmcore */
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static int create_header32(DumpState *s)
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static int create_header32(DumpState *s, Error **errp)
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{
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int ret = 0;
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DiskDumpHeader32 *dh = NULL;
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@ -784,7 +787,7 @@ static int create_header32(DumpState *s)
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dh->status = cpu_to_dump32(s, status);
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if (write_buffer(s->fd, 0, dh, size) < 0) {
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dump_error(s, "dump: failed to write disk dump header.\n");
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dump_error(s, "dump: failed to write disk dump header", errp);
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ret = -1;
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goto out;
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}
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@ -804,7 +807,7 @@ static int create_header32(DumpState *s)
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if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
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block_size, kh, size) < 0) {
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dump_error(s, "dump: failed to write kdump sub header.\n");
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dump_error(s, "dump: failed to write kdump sub header", errp);
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ret = -1;
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goto out;
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}
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@ -814,14 +817,14 @@ static int create_header32(DumpState *s)
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s->note_buf_offset = 0;
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/* use s->note_buf to store notes temporarily */
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if (write_elf32_notes(buf_write_note, s) < 0) {
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if (write_elf32_notes(buf_write_note, s, errp) < 0) {
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ret = -1;
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goto out;
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}
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if (write_buffer(s->fd, offset_note, s->note_buf,
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s->note_size) < 0) {
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dump_error(s, "dump: failed to write notes");
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dump_error(s, "dump: failed to write notes", errp);
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ret = -1;
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goto out;
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}
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@ -843,7 +846,7 @@ out:
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}
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/* write common header, sub header and elf note to vmcore */
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static int create_header64(DumpState *s)
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static int create_header64(DumpState *s, Error **errp)
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{
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int ret = 0;
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DiskDumpHeader64 *dh = NULL;
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@ -889,7 +892,7 @@ static int create_header64(DumpState *s)
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dh->status = cpu_to_dump32(s, status);
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if (write_buffer(s->fd, 0, dh, size) < 0) {
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dump_error(s, "dump: failed to write disk dump header.\n");
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dump_error(s, "dump: failed to write disk dump header", errp);
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ret = -1;
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goto out;
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}
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@ -909,7 +912,7 @@ static int create_header64(DumpState *s)
|
||||
|
||||
if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
|
||||
block_size, kh, size) < 0) {
|
||||
dump_error(s, "dump: failed to write kdump sub header.\n");
|
||||
dump_error(s, "dump: failed to write kdump sub header", errp);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
@ -919,14 +922,14 @@ static int create_header64(DumpState *s)
|
||||
s->note_buf_offset = 0;
|
||||
|
||||
/* use s->note_buf to store notes temporarily */
|
||||
if (write_elf64_notes(buf_write_note, s) < 0) {
|
||||
if (write_elf64_notes(buf_write_note, s, errp) < 0) {
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (write_buffer(s->fd, offset_note, s->note_buf,
|
||||
s->note_size) < 0) {
|
||||
dump_error(s, "dump: failed to write notes");
|
||||
dump_error(s, "dump: failed to write notes", errp);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
@ -947,12 +950,12 @@ out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int write_dump_header(DumpState *s)
|
||||
static int write_dump_header(DumpState *s, Error **errp)
|
||||
{
|
||||
if (s->dump_info.d_class == ELFCLASS32) {
|
||||
return create_header32(s);
|
||||
return create_header32(s, errp);
|
||||
} else {
|
||||
return create_header64(s);
|
||||
return create_header64(s, errp);
|
||||
}
|
||||
}
|
||||
|
||||
@ -1066,7 +1069,7 @@ static bool get_next_page(GuestPhysBlock **blockptr, uint64_t *pfnptr,
|
||||
return true;
|
||||
}
|
||||
|
||||
static int write_dump_bitmap(DumpState *s)
|
||||
static int write_dump_bitmap(DumpState *s, Error **errp)
|
||||
{
|
||||
int ret = 0;
|
||||
uint64_t last_pfn, pfn;
|
||||
@ -1087,7 +1090,7 @@ static int write_dump_bitmap(DumpState *s)
|
||||
while (get_next_page(&block_iter, &pfn, NULL, s)) {
|
||||
ret = set_dump_bitmap(last_pfn, pfn, true, dump_bitmap_buf, s);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to set dump_bitmap.\n");
|
||||
dump_error(s, "dump: failed to set dump_bitmap", errp);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
@ -1105,7 +1108,7 @@ static int write_dump_bitmap(DumpState *s)
|
||||
ret = set_dump_bitmap(last_pfn, last_pfn + PFN_BUFBITMAP, false,
|
||||
dump_bitmap_buf, s);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to sync dump_bitmap.\n");
|
||||
dump_error(s, "dump: failed to sync dump_bitmap", errp);
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
@ -1197,7 +1200,7 @@ static inline bool is_zero_page(const uint8_t *buf, size_t page_size)
|
||||
return buffer_is_zero(buf, page_size);
|
||||
}
|
||||
|
||||
static int write_dump_pages(DumpState *s)
|
||||
static int write_dump_pages(DumpState *s, Error **errp)
|
||||
{
|
||||
int ret = 0;
|
||||
DataCache page_desc, page_data;
|
||||
@ -1241,7 +1244,7 @@ static int write_dump_pages(DumpState *s)
|
||||
ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false);
|
||||
g_free(buf);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page data(zero page).\n");
|
||||
dump_error(s, "dump: failed to write page data (zero page)", errp);
|
||||
goto out;
|
||||
}
|
||||
|
||||
@ -1257,7 +1260,7 @@ static int write_dump_pages(DumpState *s)
|
||||
ret = write_cache(&page_desc, &pd_zero, sizeof(PageDescriptor),
|
||||
false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page desc.\n");
|
||||
dump_error(s, "dump: failed to write page desc", errp);
|
||||
goto out;
|
||||
}
|
||||
} else {
|
||||
@ -1282,7 +1285,7 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_data, buf_out, size_out, false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page data.\n");
|
||||
dump_error(s, "dump: failed to write page data", errp);
|
||||
goto out;
|
||||
}
|
||||
#ifdef CONFIG_LZO
|
||||
@ -1295,7 +1298,7 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_data, buf_out, size_out, false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page data.\n");
|
||||
dump_error(s, "dump: failed to write page data", errp);
|
||||
goto out;
|
||||
}
|
||||
#endif
|
||||
@ -1309,7 +1312,7 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_data, buf_out, size_out, false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page data.\n");
|
||||
dump_error(s, "dump: failed to write page data", errp);
|
||||
goto out;
|
||||
}
|
||||
#endif
|
||||
@ -1324,7 +1327,7 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_data, buf, TARGET_PAGE_SIZE, false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page data.\n");
|
||||
dump_error(s, "dump: failed to write page data", errp);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
@ -1336,7 +1339,7 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_desc, &pd, sizeof(PageDescriptor), false);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write page desc.\n");
|
||||
dump_error(s, "dump: failed to write page desc", errp);
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
@ -1344,12 +1347,12 @@ static int write_dump_pages(DumpState *s)
|
||||
|
||||
ret = write_cache(&page_desc, NULL, 0, true);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to sync cache for page_desc.\n");
|
||||
dump_error(s, "dump: failed to sync cache for page_desc", errp);
|
||||
goto out;
|
||||
}
|
||||
ret = write_cache(&page_data, NULL, 0, true);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to sync cache for page_data.\n");
|
||||
dump_error(s, "dump: failed to sync cache for page_data", errp);
|
||||
goto out;
|
||||
}
|
||||
|
||||
@ -1366,7 +1369,7 @@ out:
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int create_kdump_vmcore(DumpState *s)
|
||||
static int create_kdump_vmcore(DumpState *s, Error **errp)
|
||||
{
|
||||
int ret;
|
||||
|
||||
@ -1394,28 +1397,28 @@ static int create_kdump_vmcore(DumpState *s)
|
||||
|
||||
ret = write_start_flat_header(s->fd);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write start flat header.\n");
|
||||
dump_error(s, "dump: failed to write start flat header", errp);
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = write_dump_header(s);
|
||||
ret = write_dump_header(s, errp);
|
||||
if (ret < 0) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = write_dump_bitmap(s);
|
||||
ret = write_dump_bitmap(s, errp);
|
||||
if (ret < 0) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = write_dump_pages(s);
|
||||
ret = write_dump_pages(s, errp);
|
||||
if (ret < 0) {
|
||||
return -1;
|
||||
}
|
||||
|
||||
ret = write_end_flat_header(s->fd);
|
||||
if (ret < 0) {
|
||||
dump_error(s, "dump: failed to write end flat header.\n");
|
||||
dump_error(s, "dump: failed to write end flat header", errp);
|
||||
return -1;
|
||||
}
|
||||
|
||||
@ -1699,13 +1702,9 @@ void qmp_dump_guest_memory(bool paging, const char *file, bool has_begin,
|
||||
}
|
||||
|
||||
if (has_format && format != DUMP_GUEST_MEMORY_FORMAT_ELF) {
|
||||
if (create_kdump_vmcore(s) < 0) {
|
||||
error_set(errp, QERR_IO_ERROR);
|
||||
}
|
||||
create_kdump_vmcore(s, errp);
|
||||
} else {
|
||||
if (create_vmcore(s) < 0) {
|
||||
error_set(errp, QERR_IO_ERROR);
|
||||
}
|
||||
create_vmcore(s, errp);
|
||||
}
|
||||
|
||||
g_free(s);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user