mirror of
https://github.com/checkpoint-restore/criu.git
synced 2026-07-18 09:05:10 +00:00
164ccc095f
Kill all the macros for reading/writing image parts. New API looks like * write_img_buf/write_img Write an object into an image. Reports 0 for OK, -1 for error. The _buf version accepts object size as an argument, the other one uses sizeof() * read_img_buf/read_img Reads an object from image. Reports 0 for OK, -1 for error or EOF. * read_img_buf_eof/read_img Reads an object from image. Reports 1 for OK, 0 for EOF and -1 for error. This is not symmetrical with the previous one, but it was done deliberately to make it possible to write code like ret = read_img_bug_eof(); if (ret <= 0) return ret; /* 0 means OK, all is done, -1 means error was met */. ... /* 1 means object was read, can proceed */ Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
41 lines
953 B
C
41 lines
953 B
C
#include <linux/types.h>
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#include <sys/socket.h>
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#include <linux/netlink.h>
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#include <string.h>
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#include <unistd.h>
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#include "libnetlink.h"
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#include "util.h"
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int parse_rtattr(struct rtattr *tb[], int max, struct rtattr *rta, int len)
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{
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memset(tb, 0, sizeof(struct rtattr *) * (max + 1));
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while (RTA_OK(rta, len)) {
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if ((rta->rta_type <= max) && (!tb[rta->rta_type]))
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tb[rta->rta_type] = rta;
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rta = RTA_NEXT(rta,len);
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}
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if (len)
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pr_warning("Trimmed RTA: len %d, rta_len %d\n", len, rta->rta_len);
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return 0;
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}
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int nlmsg_receive(char *buf, int len, int (*cb)(struct nlmsghdr *))
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{
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struct nlmsghdr *hdr;
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for (hdr = (struct nlmsghdr *)buf; NLMSG_OK(hdr, len); hdr = NLMSG_NEXT(hdr, len)) {
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if (hdr->nlmsg_seq != CR_NLMSG_SEQ)
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continue;
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if (hdr->nlmsg_type == NLMSG_DONE)
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return 0;
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if (hdr->nlmsg_type == NLMSG_ERROR) {
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pr_err("Error getting sockets list\n");
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return -1;
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}
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if (cb(hdr))
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return -1;
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}
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return 1;
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}
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