From 5d31babe5c7d854d6b8470bc9fa67a698926e65d Mon Sep 17 00:00:00 2001 From: qiaonuohan Date: Tue, 18 Feb 2014 14:11:28 +0800 Subject: dump: add API to write vmcore Function is used to write vmcore in flatten format. In flatten format, data is written block by block, and in front of each block, a struct MakedumpfileDataHeader is stored there to indicate the offset and size of the data block. struct MakedumpfileDataHeader { int64_t offset; int64_t buf_size; }; Signed-off-by: Qiao Nuohan Reviewed-by: Laszlo Ersek Signed-off-by: Luiz Capitulino --- dump.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'dump.c') diff --git a/dump.c b/dump.c index f233b3e54c..238ffa5917 100644 --- a/dump.c +++ b/dump.c @@ -728,6 +728,27 @@ static int write_end_flat_header(int fd) return 0; } +static int write_buffer(int fd, off_t offset, const void *buf, size_t size) +{ + size_t written_size; + MakedumpfileDataHeader mdh; + + 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; + } + + 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; -- cgit v1.2.1