@@ -76,8 +76,15 @@ typedef struct DumpState {
int64_t length;
Error **errp;
+ bool flag_flatten;
+ uint32_t nr_cpus;
+ size_t page_size;
+ size_t max_mapnr;
+ size_t len_dump_bitmap;
void *note_buf;
size_t note_buf_offset;
+ off_t offset_dump_bitmap;
+ off_t offset_page;
} DumpState;
static int dump_cleanup(DumpState *s)
@@ -761,6 +768,163 @@ static int buf_write_note(void *buf, size_t size, void *opaque)
return 0;
}
+/* write common header, sub header and elf note to vmcore */
+static int create_header32(DumpState *s)
+{
+ int ret = 0;
+ DiskDumpHeader32 *dh;
+ KdumpSubHeader32 *kh;
+ size_t size;
+
+ /* write common header, the version of kdump-compressed format is 5th */
+ size = sizeof(DiskDumpHeader32);
+ dh = g_malloc0(size);
+
+ strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
+ dh->header_version = 5;
+ dh->block_size = s->page_size;
+ dh->sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size;
+ dh->sub_hdr_size = divideup(dh->sub_hdr_size, dh->block_size);
+ dh->max_mapnr = s->max_mapnr;
+ dh->nr_cpus = s->nr_cpus;
+ dh->bitmap_blocks = divideup(s->len_dump_bitmap, s->page_size);
+ memcpy(&(dh->utsname.machine), "i686", 4);
+
+ if (write_buffer(s->fd, s->flag_flatten, 0, dh, size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* write sub header */
+ size = sizeof(KdumpSubHeader32);
+ kh = g_malloc0(size);
+
+ kh->phys_base = PHYS_BASE;
+ kh->dump_level = DUMP_LEVEL;
+
+ kh->offset_note = DISKDUMP_HEADER_BLOCKS * dh->block_size + size;
+ kh->note_size = s->note_size;
+
+ if (write_buffer(s->fd, s->flag_flatten, dh->block_size, kh, size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* write note */
+ s->note_buf = g_malloc(s->note_size);
+ s->note_buf_offset = 0;
+
+ /* use s->note_buf to store notes temporarily */
+ if (write_elf32_notes(buf_write_note, s) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ if (write_buffer(s->fd, s->flag_flatten, kh->offset_note, s->note_buf,
+ s->note_size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* get offset of dump_bitmap */
+ s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + dh->sub_hdr_size) *
+ dh->block_size;
+
+ /* get offset of page */
+ s->offset_page = (DISKDUMP_HEADER_BLOCKS + dh->sub_hdr_size +
+ dh->bitmap_blocks) * dh->block_size;
+
+out:
+ g_free(dh);
+ g_free(kh);
+ g_free(s->note_buf);
+
+ return ret;
+}
+
+/* write common header, sub header and elf note to vmcore */
+static int create_header64(DumpState *s)
+{
+ int ret = 0;
+ DiskDumpHeader64 *dh;
+ KdumpSubHeader64 *kh;
+ size_t size;
+
+ /* write common header, the version of kdump-compressed format is 5th */
+ size = sizeof(DiskDumpHeader64);
+ dh = g_malloc0(size);
+
+ strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
+ dh->header_version = 5;
+ dh->block_size = s->page_size;
+ dh->sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size;
+ dh->sub_hdr_size = divideup(dh->sub_hdr_size, dh->block_size);
+ dh->max_mapnr = s->max_mapnr;
+ dh->nr_cpus = s->nr_cpus;
+ dh->bitmap_blocks = divideup(s->len_dump_bitmap, s->page_size);
+ memcpy(&(dh->utsname.machine), "x86_64", 6);
+
+ if (write_buffer(s->fd, s->flag_flatten, 0, dh, size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* write sub header */
+ size = sizeof(KdumpSubHeader64);
+ kh = g_malloc0(size);
+
+ kh->phys_base = PHYS_BASE;
+ kh->dump_level = DUMP_LEVEL;
+
+ kh->offset_note = DISKDUMP_HEADER_BLOCKS * dh->block_size + size;
+ kh->note_size = s->note_size;
+
+ if (write_buffer(s->fd, s->flag_flatten, dh->block_size, kh, size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* write note */
+ s->note_buf = g_malloc0(s->note_size);
+ s->note_buf_offset = 0;
+
+ /* use s->note_buf to store notes temporarily */
+ if (write_elf64_notes(buf_write_note, s) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ if (write_buffer(s->fd, s->flag_flatten, kh->offset_note, s->note_buf,
+ s->note_size) < 0) {
+ ret = -1;
+ goto out;
+ }
+
+ /* get offset of dump_bitmap */
+ s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + dh->sub_hdr_size) *
+ dh->block_size;
+
+ /* get offset of page */
+ s->offset_page = (DISKDUMP_HEADER_BLOCKS + dh->sub_hdr_size +
+ dh->bitmap_blocks) * dh->block_size;
+
+out:
+ g_free(dh);
+ g_free(kh);
+ g_free(s->note_buf);
+
+ return ret;
+}
+
+static int write_dump_header(DumpState *s)
+{
+ if (s->dump_info.d_machine == EM_386) {
+ return create_header32(s);
+ } else {
+ return create_header64(s);
+ }
+}
+
static ram_addr_t get_start_block(DumpState *s)
{
RAMBlock *block;
@@ -20,6 +20,14 @@
#define VERSION_FLAT_HEADER (1) /* version of flattened format */
#define END_FLAG_FLAT_HEADER (-1)
+#define KDUMP_SIGNATURE "KDUMP "
+#define SIG_LEN (sizeof(KDUMP_SIGNATURE) - 1)
+#define PHYS_BASE (0)
+#define DUMP_LEVEL (1)
+#define DISKDUMP_HEADER_BLOCKS (1)
+
+#define divideup(x, y) (((x) + ((y) - 1)) / (y))
+
typedef struct ArchDumpInfo {
int d_machine; /* Architecture */
int d_endian; /* ELFDATA2LSB or ELFDATA2MSB */
@@ -37,6 +45,77 @@ typedef struct QEMU_PACKED MakedumpfileDataHeader {
int64_t buf_size;
} MakedumpfileDataHeader;
+typedef struct QEMU_PACKED NewUtsname {
+ char sysname[65];
+ char nodename[65];
+ char release[65];
+ char version[65];
+ char machine[65];
+ char domainname[65];
+} NewUtsname;
+
+typedef struct QEMU_PACKED DiskDumpHeader32 {
+ char signature[SIG_LEN]; /* = "KDUMP " */
+ uint32_t header_version; /* Dump header version */
+ NewUtsname utsname; /* copy of system_utsname */
+ char timestamp[10]; /* Time stamp */
+ uint32_t status; /* Above flags */
+ uint32_t block_size; /* Size of a block in byte */
+ uint32_t sub_hdr_size; /* Size of arch dependent header in block */
+ uint32_t bitmap_blocks; /* Size of Memory bitmap in block */
+ uint32_t max_mapnr; /* = max_mapnr */
+ uint32_t total_ram_blocks; /* Number of blocks should be written */
+ uint32_t device_blocks; /* Number of total blocks in dump device */
+ uint32_t written_blocks; /* Number of written blocks */
+ uint32_t current_cpu; /* CPU# which handles dump */
+ uint32_t nr_cpus; /* Number of CPUs */
+} DiskDumpHeader32;
+
+typedef struct QEMU_PACKED DiskDumpHeader64 {
+ char signature[SIG_LEN]; /* = "KDUMP " */
+ uint32_t header_version; /* Dump header version */
+ NewUtsname utsname; /* copy of system_utsname */
+ char timestamp[22]; /* Time stamp */
+ uint32_t status; /* Above flags */
+ uint32_t block_size; /* Size of a block in byte */
+ uint32_t sub_hdr_size; /* Size of arch dependent header in block */
+ uint32_t bitmap_blocks; /* Size of Memory bitmap in block */
+ uint32_t max_mapnr; /* = max_mapnr */
+ uint32_t total_ram_blocks; /* Number of blocks should be written */
+ uint32_t device_blocks; /* Number of total blocks in dump device */
+ uint32_t written_blocks; /* Number of written blocks */
+ uint32_t current_cpu; /* CPU# which handles dump */
+ uint32_t nr_cpus; /* Number of CPUs */
+} DiskDumpHeader64;
+
+typedef struct QEMU_PACKED KdumpSubHeader32 {
+ uint32_t phys_base;
+ uint32_t dump_level; /* header_version 1 and later */
+ uint32_t split; /* header_version 2 and later */
+ uint32_t start_pfn; /* header_version 2 and later */
+ uint32_t end_pfn; /* header_version 2 and later */
+ uint64_t offset_vmcoreinfo; /* header_version 3 and later */
+ uint32_t size_vmcoreinfo; /* header_version 3 and later */
+ uint64_t offset_note; /* header_version 4 and later */
+ uint32_t note_size; /* header_version 4 and later */
+ uint64_t offset_eraseinfo; /* header_version 5 and later */
+ uint32_t size_eraseinfo; /* header_version 5 and later */
+} KdumpSubHeader32;
+
+typedef struct QEMU_PACKED KdumpSubHeader64 {
+ uint64_t phys_base;
+ uint32_t dump_level; /* header_version 1 and later */
+ uint32_t split; /* header_version 2 and later */
+ uint64_t start_pfn; /* header_version 2 and later */
+ uint64_t end_pfn; /* header_version 2 and later */
+ uint64_t offset_vmcoreinfo; /* header_version 3 and later */
+ uint64_t size_vmcoreinfo; /* header_version 3 and later */
+ uint64_t offset_note; /* header_version 4 and later */
+ uint64_t note_size; /* header_version 4 and later */
+ uint64_t offset_eraseinfo; /* header_version 5 and later */
+ uint64_t size_eraseinfo; /* header_version 5 and later */
+} KdumpSubHeader64;
+
int cpu_get_dump_info(ArchDumpInfo *info);
ssize_t cpu_get_note_size(int class, int machine, int nr_cpus);