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[Qemu-devel] [PATCH v6 03/11] dump: Add API to write vmcore
From: |
Qiao Nuohan |
Subject: |
[Qemu-devel] [PATCH v6 03/11] dump: Add API to write vmcore |
Date: |
Sun, 5 Jan 2014 15:27:36 +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>
---
dump.c | 28 ++++++++++++++++++++++++++++
1 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/dump.c b/dump.c
index 89baeab..764db39 100644
--- a/dump.c
+++ b/dump.c
@@ -726,6 +726,34 @@ 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)
{
GuestPhysBlock *block;
--
1.7.1
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, (continued)
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Andreas Färber, 2014/01/07
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Qiao Nuohan, 2014/01/13
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Laszlo Ersek, 2014/01/13
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Qiao Nuohan, 2014/01/13
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Laszlo Ersek, 2014/01/13
- Re: [Qemu-devel] [PATCH v6 06/11] dump: add API to write dump header, Qiao Nuohan, 2014/01/13
[Qemu-devel] [PATCH v6 05/11] dump: add support for lzo/snappy, Qiao Nuohan, 2014/01/05
[Qemu-devel] [PATCH v6 03/11] dump: Add API to write vmcore,
Qiao Nuohan <=
[Qemu-devel] [PATCH v6 11/11] Add 'query-dump-guest-memory-capability' command, Qiao Nuohan, 2014/01/05
[Qemu-devel] [PATCH v6 02/11] dump: Add API to write header of flatten format, Qiao Nuohan, 2014/01/05
[Qemu-devel] [PATCH v6 04/11] dump: Add API to write elf notes to buffer, Qiao Nuohan, 2014/01/05
[Qemu-devel] [PATCH v6 10/11] dump: Make kdump-compressed format available for 'dump-guest-memory', Qiao Nuohan, 2014/01/05