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[Qemu-devel] [PATCH v5 3/9] dump: Add API to write vmcore
From: |
Qiao Nuohan |
Subject: |
[Qemu-devel] [PATCH v5 3/9] dump: Add API to write vmcore |
Date: |
Tue, 9 Jul 2013 15:30:08 +0800 |
Function is used to write vmcore. If flag_flatten is specified, flatten format
will be used. In flatten format, data is written block by block in vmcore.
struct MakedumpfileDataHeader is used to indicate the offset and size of a data
block.
struct MakedumpfileDataHeader {
int64_t offset;
int64_t buf_size;
};
Signed-off-by: Qiao Nuohan <address@hidden>
Reviewed-by: Zhang Xiaohe <address@hidden>
---
dump.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/dump.c b/dump.c
index f04d4fc..6f14b8d 100644
--- a/dump.c
+++ b/dump.c
@@ -714,6 +714,34 @@ static int write_end_flat_header(int fd)
return 0;
}
+static int write_buffer(int fd, bool flag_flatten, off_t offset, void *buf,
+ size_t size)
+{
+ size_t written_size;
+ MakedumpfileDataHeader mdh;
+
+ if (flag_flatten) {
+ mdh.offset = cpu_to_be64(offset);
+ mdh.buf_size = cpu_to_be64(size);
+
+ written_size = qemu_write_full(fd, &mdh, sizeof(mdh));
+ if (written_size != sizeof(mdh)) {
+ return -1;
+ }
+ } else {
+ if (lseek(fd, offset, SEEK_SET) < 0) {
+ return -1;
+ }
+ }
+
+ written_size = qemu_write_full(fd, buf, size);
+ if (written_size != size) {
+ return -1;
+ }
+
+ return 0;
+}
+
static ram_addr_t get_start_block(DumpState *s)
{
RAMBlock *block;
--
1.7.1
- [Qemu-devel] [PATCH v5 0/9] Make 'dump-guest-memory' dump in kdump-compressed format, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 1/9] dump: Add argument to write_elfxx_notes, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 2/9] dump: Add API to write header of flatten format, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 3/9] dump: Add API to write vmcore,
Qiao Nuohan <=
- [Qemu-devel] [PATCH v5 7/9] dump: Add APIs to operate DataCache, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 4/9] dump: Add API to write elf notes to buffer, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 6/9] dump: Add API to write dump_bitmap, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 9/9] dump: Make kdump-compressed format available for 'dump-guest-memory', Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 8/9] dump: Add API to write dump pages, Qiao Nuohan, 2013/07/09
- [Qemu-devel] [PATCH v5 5/9] dump: add API to write dump header, Qiao Nuohan, 2013/07/09