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libnetlink: check flag NLM_F_DUMP_INTR during dumps 

When this flag is set, it means that dump was interrupted and result may be
inconsistent.

Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
This commit is contained in:
Nicolas Dichtel 2013-03-22 06:34:02 +00:00 committed by Stephen Hemminger
parent e8740e42ec
commit 16f02e145e
1 changed files with 9 additions and 1 deletions
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10
lib/libnetlink.c
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@ -194,6 +194,7 @@ int rtnl_dump_filter_l(struct rtnl_handle *rth,
.msg_iovlen = 1, .msg_iovlen = 1,
}; };
char buf[16384]; char buf[16384];
int dump_intr = 0;
iov.iov_base = buf; iov.iov_base = buf;
while (1) { while (1) {
@ -230,6 +231,9 @@ int rtnl_dump_filter_l(struct rtnl_handle *rth,
h->nlmsg_seq != rth->dump) h->nlmsg_seq != rth->dump)
goto skip_it; goto skip_it;
if (h->nlmsg_flags & NLM_F_DUMP_INTR)
dump_intr = 1;
if (h->nlmsg_type == NLMSG_DONE) { if (h->nlmsg_type == NLMSG_DONE) {
found_done = 1; found_done = 1;
break; /* process next filter */ break; /* process next filter */
@ -254,8 +258,12 @@ skip_it:
} }
} }
if (found_done) if (found_done) {
if (dump_intr)
fprintf(stderr,
"Dump was interrupted and may be inconsistent.\n");
return 0; return 0;
}
if (msg.msg_flags & MSG_TRUNC) { if (msg.msg_flags & MSG_TRUNC) {
fprintf(stderr, "Message truncated\n"); fprintf(stderr, "Message truncated\n");