On 03/11/2012 07:19 PM, Glauber Costa wrote:
> On 03/09/2012 03:20 PM, Jeff Liu wrote:
>> Introduce a new disk space parse strategy routine for cgroup quota
>> supports.
>> disk_space_parse() is simply copied from mmparse() with Petabytes and
>> Terabytes parse.
>>
>> Signed-off-by: Jie Liu<jeff.liu@xxxxxxxxxx>
>> ---
>> include/linux/res_counter.h | 3 ++
>> kernel/res_counter.c | 58
>> +++++++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 61 insertions(+), 0 deletions(-)
>>
>> diff --git a/include/linux/res_counter.h b/include/linux/res_counter.h
>> index c9d625c..f8ce315 100644
>> --- a/include/linux/res_counter.h
>> +++ b/include/linux/res_counter.h
>> @@ -79,6 +79,9 @@ typedef int (*write_strategy_fn)(const char *buf,
>> unsigned long long *val);
>> int res_counter_memparse_write_strategy(const char *buf,
>> unsigned long long *res);
>>
>> +int res_counter_diskspace_parse_write_strategy(const char *buf,
>> + unsigned long long *res);
>> +
>> int res_counter_write(struct res_counter *counter, int member,
>> const char *buffer, write_strategy_fn write_strategy);
>>
>> diff --git a/kernel/res_counter.c b/kernel/res_counter.c
>> index 34683ef..42c1623 100644
>> --- a/kernel/res_counter.c
>> +++ b/kernel/res_counter.c
>> @@ -145,6 +145,64 @@ u64 res_counter_read_u64(struct res_counter
>> *counter, int member)
>> }
>> #endif
>>
>> +/*
>> + * Copy from memparse(), add terabytes, petabytes parse support.
>> + */
> Don't see a reason for that. It is all bytes and such, just add the
> modifiers you want to the normal parse...
ok, I'll take care.
Thanks,
-Jeff
>
>> +unsigned long long disk_space_parse(const char *ptr, char **retptr)
>> +{
>> + char *endptr; /* local pointer to end of parsed string */
>> + unsigned long long ret = kstrtoull(ptr,&endptr, 0);
>> +
>> + switch (*endptr) {
>> + case 'P':
>> + case 'p':
>> + ret<<= 10;
>> + case 'T':
>> + case 't':
>> + ret<<= 10;
>> + case 'G':
>> + case 'g':
>> + ret<<= 10;
>> + case 'M':
>> + case 'm':
>> + ret<<= 10;
>> + case 'K':
>> + case 'k':
>> + ret<<= 10;
>> + endptr++;
>> + default:
>> + break;
>> + }
>> +
>> + if (retptr)
>> + *retptr = endptr;
>> +
>> + return ret;
>> +}
>> +
>> +int res_counter_diskspace_parse_write_strategy(const char *buf,
>> + unsigned long long *res)
>> +{
>> + char *end;
>> +
>> + /* return RESOURCE_MAX(unlimited) if "-1" is specified */
>> + if (*buf == '-') {
>> + *res = kstrtoull(buf + 1,&end, 10);
>> + if (*res != 1 || *end != '\0')
>> + return -EINVAL;
>> + *res = RESOURCE_MAX;
>> + return 0;
>> + }
>> +
>> + /* FIXME - make memparse() take const char* args */
>> + *res = disk_space_parse((char *)buf,&end);
>> + if (*end != '\0')
>> + return -EINVAL;
>> +
>> + /* FIXME - need to return *res as block aligned? */
>> + return 0;
>> +}
>> +
>> int res_counter_memparse_write_strategy(const char *buf,
>> unsigned long long *res)
>> {
>
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