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-rw-r--r--dump.c223
1 files changed, 223 insertions, 0 deletions
diff --git a/dump.c b/dump.c
index 3a1944e381..4b2799f80f 100644
--- a/dump.c
+++ b/dump.c
@@ -778,6 +778,229 @@ static int buf_write_note(const 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 = NULL;
+ KdumpSubHeader32 *kh = NULL;
+ size_t size;
+ int endian = s->dump_info.d_endian;
+ uint32_t block_size;
+ uint32_t sub_hdr_size;
+ uint32_t bitmap_blocks;
+ uint32_t status = 0;
+ uint64_t offset_note;
+
+ /* write common header, the version of kdump-compressed format is 6th */
+ size = sizeof(DiskDumpHeader32);
+ dh = g_malloc0(size);
+
+ strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
+ dh->header_version = cpu_convert_to_target32(6, endian);
+ block_size = s->page_size;
+ dh->block_size = cpu_convert_to_target32(block_size, endian);
+ sub_hdr_size = sizeof(struct KdumpSubHeader32) + s->note_size;
+ sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size);
+ dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian);
+ /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */
+ dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX),
+ endian);
+ dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian);
+ bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2;
+ dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian);
+ memcpy(&(dh->utsname.machine), "i686", 4);
+
+ if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) {
+ status |= DUMP_DH_COMPRESSED_ZLIB;
+ }
+#ifdef CONFIG_LZO
+ if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) {
+ status |= DUMP_DH_COMPRESSED_LZO;
+ }
+#endif
+#ifdef CONFIG_SNAPPY
+ if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) {
+ status |= DUMP_DH_COMPRESSED_SNAPPY;
+ }
+#endif
+ dh->status = cpu_convert_to_target32(status, endian);
+
+ if (write_buffer(s->fd, 0, dh, size) < 0) {
+ dump_error(s, "dump: failed to write disk dump header.\n");
+ ret = -1;
+ goto out;
+ }
+
+ /* write sub header */
+ size = sizeof(KdumpSubHeader32);
+ kh = g_malloc0(size);
+
+ /* 64bit max_mapnr_64 */
+ kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian);
+ kh->phys_base = cpu_convert_to_target32(PHYS_BASE, endian);
+ kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian);
+
+ offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
+ kh->offset_note = cpu_convert_to_target64(offset_note, endian);
+ kh->note_size = cpu_convert_to_target32(s->note_size, endian);
+
+ if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
+ block_size, kh, size) < 0) {
+ dump_error(s, "dump: failed to write kdump sub header.\n");
+ 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_elf32_notes(buf_write_note, s) < 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");
+ ret = -1;
+ goto out;
+ }
+
+ /* get offset of dump_bitmap */
+ s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) *
+ block_size;
+
+ /* get offset of page */
+ s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) *
+ 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 = NULL;
+ KdumpSubHeader64 *kh = NULL;
+ size_t size;
+ int endian = s->dump_info.d_endian;
+ uint32_t block_size;
+ uint32_t sub_hdr_size;
+ uint32_t bitmap_blocks;
+ uint32_t status = 0;
+ uint64_t offset_note;
+
+ /* write common header, the version of kdump-compressed format is 6th */
+ size = sizeof(DiskDumpHeader64);
+ dh = g_malloc0(size);
+
+ strncpy(dh->signature, KDUMP_SIGNATURE, strlen(KDUMP_SIGNATURE));
+ dh->header_version = cpu_convert_to_target32(6, endian);
+ block_size = s->page_size;
+ dh->block_size = cpu_convert_to_target32(block_size, endian);
+ sub_hdr_size = sizeof(struct KdumpSubHeader64) + s->note_size;
+ sub_hdr_size = DIV_ROUND_UP(sub_hdr_size, block_size);
+ dh->sub_hdr_size = cpu_convert_to_target32(sub_hdr_size, endian);
+ /* dh->max_mapnr may be truncated, full 64bit is in kh.max_mapnr_64 */
+ dh->max_mapnr = cpu_convert_to_target32(MIN(s->max_mapnr, UINT_MAX),
+ endian);
+ dh->nr_cpus = cpu_convert_to_target32(s->nr_cpus, endian);
+ bitmap_blocks = DIV_ROUND_UP(s->len_dump_bitmap, block_size) * 2;
+ dh->bitmap_blocks = cpu_convert_to_target32(bitmap_blocks, endian);
+ memcpy(&(dh->utsname.machine), "x86_64", 6);
+
+ if (s->flag_compress & DUMP_DH_COMPRESSED_ZLIB) {
+ status |= DUMP_DH_COMPRESSED_ZLIB;
+ }
+#ifdef CONFIG_LZO
+ if (s->flag_compress & DUMP_DH_COMPRESSED_LZO) {
+ status |= DUMP_DH_COMPRESSED_LZO;
+ }
+#endif
+#ifdef CONFIG_SNAPPY
+ if (s->flag_compress & DUMP_DH_COMPRESSED_SNAPPY) {
+ status |= DUMP_DH_COMPRESSED_SNAPPY;
+ }
+#endif
+ dh->status = cpu_convert_to_target32(status, endian);
+
+ if (write_buffer(s->fd, 0, dh, size) < 0) {
+ dump_error(s, "dump: failed to write disk dump header.\n");
+ ret = -1;
+ goto out;
+ }
+
+ /* write sub header */
+ size = sizeof(KdumpSubHeader64);
+ kh = g_malloc0(size);
+
+ /* 64bit max_mapnr_64 */
+ kh->max_mapnr_64 = cpu_convert_to_target64(s->max_mapnr, endian);
+ kh->phys_base = cpu_convert_to_target64(PHYS_BASE, endian);
+ kh->dump_level = cpu_convert_to_target32(DUMP_LEVEL, endian);
+
+ offset_note = DISKDUMP_HEADER_BLOCKS * block_size + size;
+ kh->offset_note = cpu_convert_to_target64(offset_note, endian);
+ kh->note_size = cpu_convert_to_target64(s->note_size, endian);
+
+ if (write_buffer(s->fd, DISKDUMP_HEADER_BLOCKS *
+ block_size, kh, size) < 0) {
+ dump_error(s, "dump: failed to write kdump sub header.\n");
+ 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, offset_note, s->note_buf,
+ s->note_size) < 0) {
+ dump_error(s, "dump: failed to write notes");
+ ret = -1;
+ goto out;
+ }
+
+ /* get offset of dump_bitmap */
+ s->offset_dump_bitmap = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size) *
+ block_size;
+
+ /* get offset of page */
+ s->offset_page = (DISKDUMP_HEADER_BLOCKS + sub_hdr_size + bitmap_blocks) *
+ 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)
{
GuestPhysBlock *block;
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-29 20:57:38 +0000