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btrfs-progs: qgroup limit: error out if input value is negative

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If we pass a negative value to command qgroup limit, btrfs-progs
would convert it to unsigned long long silently. That's a little
confusing to user, why I can limit my quota to a negative value.

This patch add a check in parse_limit, if the input value is negative,
error out to user.

Reported-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Dongsheng Yang <yangds.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Dongsheng Yang 2015-06-03 17:27:03 +08:00 committed by David Sterba
parent ea496435d5
commit d9fd7cc0f5
1 changed files with 4 additions and 0 deletions
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4
cmds-qgroup.c
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@ -116,6 +116,10 @@ static int parse_limit(const char *p, unsigned long long *s)
*s = CLEAR_VALUE;
return 1;
}
if (p[0] == '-')
return 0;
size = strtoull(p, &endptr, 10);
switch (*endptr) {
case 'T':