This patch fixes an issue where snmpdf was not returning the

correct total disk size and available disk size when the size

of the filesystem is larger than 1TB.This bug is already fixed

in the community and the fix is available from the net-snmp

version 5.6 onwards.The fix here slightly differs from the community

since the patch in the community is applied on net-snmp version 5.6 .

This patch is taken from the below link.

--- net-snmp-5.4.1/agent/mibgroup/host/hr_storage.c Thu May 21 23:47:45 2015

+++ net-snmp-5.4.1/agent/mibgroup/host/hr_storage.c Thu May 21 23:55:59 2015

@@ -505,6 +505,7 @@

int exact, size_t * var_len, WriteMethod ** write_method)

{

int store_idx = 0;

+ int factor = 0;

static char string[1024];

struct HRFS_statfs stat_buf;

void *ptr;

@@ -558,6 +558,12 @@

mem = (netsnmp_memory_info*)ptr;

}

+/* Scaling factor for large filesystems */

+ if (store_idx > NETSNMP_MEM_TYPE_MAX) {

+ unsigned long long tmp = stat_buf.f_blocks;

+ while (tmp > 0x7fffffff)

+ tmp >>= 1, factor++;

+ }

switch (vp->magic) {

@@ -593,9 +599,9 @@

case HRSTORE_UNITS:

if (store_idx > NETSNMP_MEM_TYPE_MAX)

#if HRFS_HAS_FRSIZE

- long_return = stat_buf.f_frsize;

+ long_return = stat_buf.f_frsize << factor;

#else

- long_return = stat_buf.f_bsize;

+ long_return = stat_buf.f_bsize << factor;

#endif

else {

if ( !mem || mem->units == -1 )

@@ -605,7 +611,7 @@

return (u_char *) & long_return;

case HRSTORE_SIZE:

if (store_idx > NETSNMP_MEM_TYPE_MAX)

- long_return = stat_buf.f_blocks;

+ long_return = stat_buf.f_blocks >> factor;

else {

if ( !mem || mem->size == -1 )

goto try_next;

@@ -614,7 +620,7 @@

return (u_char *) & long_return;

case HRSTORE_USED:

if (store_idx > NETSNMP_MEM_TYPE_MAX)

- long_return = (stat_buf.f_blocks - stat_buf.f_bfree);

+ long_return = (stat_buf.f_blocks - stat_buf.f_bfree) >> factor;

else {

if ( !mem || mem->size == -1 || mem->free == -1 )

goto try_next;