dump: add members to DumpState and init some of them
add some members to DumpState that will be used in writing vmcore in
kdump-compressed format. some of them, like page_size, will be initialized
in the patch.
Signed-off-by: Qiao Nuohan <qiaonuohan@cn.fujitsu.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
diff --git a/dump.c b/dump.c
index 2b940bd..3a1944e 100644
--- a/dump.c
+++ b/dump.c
@@ -79,6 +79,16 @@
uint8_t *note_buf; /* buffer for notes */
size_t note_buf_offset; /* the writing place in note_buf */
+ uint32_t nr_cpus; /* number of guest's cpu */
+ size_t page_size; /* guest's page size */
+ uint32_t page_shift; /* guest's page shift */
+ uint64_t max_mapnr; /* the biggest guest's phys-mem's number */
+ size_t len_dump_bitmap; /* the size of the place used to store
+ dump_bitmap in vmcore */
+ off_t offset_dump_bitmap; /* offset of dump_bitmap part in vmcore */
+ off_t offset_page; /* offset of page part in vmcore */
+ size_t num_dumpable; /* number of page that can be dumped */
+ uint32_t flag_compress; /* indicate the compression format */
} DumpState;
static int dump_cleanup(DumpState *s)
@@ -796,6 +806,14 @@
return -1;
}
+static void get_max_mapnr(DumpState *s)
+{
+ GuestPhysBlock *last_block;
+
+ last_block = QTAILQ_LAST(&s->guest_phys_blocks.head, GuestPhysBlockHead);
+ s->max_mapnr = paddr_to_pfn(last_block->target_end, s->page_shift);
+}
+
static int dump_init(DumpState *s, int fd, bool paging, bool has_filter,
int64_t begin, int64_t length, Error **errp)
{
@@ -864,6 +882,16 @@
qemu_get_guest_simple_memory_mapping(&s->list, &s->guest_phys_blocks);
}
+ s->nr_cpus = nr_cpus;
+ s->page_size = TARGET_PAGE_SIZE;
+ s->page_shift = ffs(s->page_size) - 1;
+
+ get_max_mapnr(s);
+
+ uint64_t tmp;
+ tmp = DIV_ROUND_UP(DIV_ROUND_UP(s->max_mapnr, CHAR_BIT), s->page_size);
+ s->len_dump_bitmap = tmp * s->page_size;
+
if (s->has_filter) {
memory_mapping_filter(&s->list, s->begin, s->length);
}